Simsek DEMIR

PUBLICATIONS

Publications

Journal Papers

  1. Demirel K, Yazgan E, Demir Ş, Akın T; A folded leg Ka-band RF MEMS shunt switch with amorphous silicon (a-Si) sacrificial layer, Microsystem Technologies, 2016, pp. 1-10.

  2. Eslamloo, Masoud Khoubroo; Mohammadi, Pejman; Demir, Simsek; Khoubrou, Mina; Miniaturized Wideband Branch-Line Hybrid Coupler with Capacitive Effect and Defected Ground Structure (DGS), Indian Journal of Science and Technology, 8 (35), 2015.

  3. Demirel K, Yazgan E, Demir Ş, Akın T; Cantilever type radio frequency microelectromechanical systems shunt capacitive switch design and fabrication. J. Micro/Nanolith. MEMS MOEMS. 2015, 14(3), 35005 (1-10).

  4. C. Cetintepe, E. Sagiroglu Topalli, S. Demir, O. Aydin Civi, and T. Akin, "A Fabrication Process based on Structural Layer Formation Using Au-Au Thermocompression Bonding for RF MEMS Capacitive Switches and Their Performance", International Journal of Microwave and Wireless Technologies / Volume 6 / Special Issue 05 / October 2014, pp 473-480.

  5. C. Cetintepe, S. Demir, "Multipath Characteristics of Frequency Diverse Arrays Over a Ground Plane", " in Antennas and Propagation, IEEE Transactions on , vol.62, no.7, pp.3567-3574, July 2014

  6. I. Comart, K. Topalli, S. Demir, T. Akin, "Microwave Characterization of a Wafer-Level Packaging Approach for RF MEMS Devices Using Glass Frit Bonding", IEEE Sensors Journal, vol. 14, no. 6, pp. 2006-2011, 2014.

  7. P. Mohammadi and S. Demir, "Substrate Integrated Waveguide Unequal Power Divider with Adjustable Dividing Ratio", Journal of Electrical Engineering, Vol. 14, no. 2, pp. 168-172, 2014.

  8. P. Mohammadi and S. Demir, "Loss Reduction in Substrate Integrated Waveguide Structures", Progress In Electromagnetics Research C, Vol. 46, 125-133, 2014.

  9. A. Hayrettin Yuzer, Simsek Demir, "Low order nonlinear amplifier model with distributed delay terms", Turk. J. Elec. Eng. & Comp. Sci., 22, (2014), 1007-1016. DOI: 10.3906/elk-1208-25.

  10. N. Sahan, S.Demir, "Designing an Octave-Bandwidth Doherty Amplifier Using a Novel Power Combination Method", Progress In Electromagnetics Research B, Vol. 56, 327-346, 2013.

  11. N. Sahan, S.Demir, "Analysis, Design Optimization and Performance Comparison of Bias Adapted and Asymmetrical Doherty Power Amplifiers", Progress In Electromagnetics Research B, Vol. 54, 337-356, 2013.

  12. A. Vural, O. Sengül, S. Demir & A. Hizal, "Height Estimation for Ballistic Platforms using Differential Measurements", IEEE Trans. Aerosp. Electron. Syst., vol. 49 (4), pp.2657-66, October 2013

  13. Unlu, M.; Demir, S.; Akin, T., "A 15–40-GHz Frequency Reconfigurable RF MEMS Phase Shifter," IEEE Trans. on MTT , vol.61, no.8, pp.2865,2877, August 2013.

  14. T. Eker, S. Demir, A. Hizal, "Exploitation of Linear Frequency Modulated Continuous Waveform (LFMCW) for Frequency Diverse Arrays", IEEE Trans. on Antennas and Propagation, vol. 61, no. 7, July 2013, pp 3546-3553.

  15. Unlu, M.; Demir, S.; Akin, T., "Triple stub circuit topology as simultaneous insertion phase, amplitude and impedance control circuit for phased array applications," Microwaves, Antennas & Propagation, IET , vol.6, no.13, pp.1399,1406, October 23 2012.

  16. P. Mohammadi, S. Demir, "Multi-Layer Substrate Integrated Waveguide E-Plane Power Divider" Progress In Electromagnetics Research C, Vol. 30, pp. 159-172, 2012

  17. M. Unlu, K. Topalli, H. I. Atasoy, S. Demir, O. A. Civi, T. Akin, "Hybrid Connection of RF MEMS and SMT Components in an Impedance Tuner", AEU Int. Journal of Electronics and Communication, August 2010, pp 748-756.

  18. M. Secmen, S. Demir and A. Hizal, "E-Plane Sectoral Horn Power Divider", IET Proc.-Microw. Antennas Propag., vol. 4, no. 2, Feb. 2010, pp. 191-199.

  19. K. Topalli, E. Erdil, O. A.Civi, S. Demir, S. Koc, and T. Akin, "Tunable Dual-Frequency RF MEMS Rectangular Slot Ring Antenna", Sensors and Actuators A: Physical, vol. 156, no 2, Dec. 2009, pp. 373-380.

  20. K. Topalli, M. Unlu, H. Atasoy, S. Demir, O. Civi, and T. Akin, "Empirical Formulation of Bridge Inductance in Inductively Tuned RF MEMS Shunt Switches", Progress In Electromagnetics Research, PIER 97, 343-356, 2009.

  21. N. Sahan, M. E. Inal, S. Demir,C. Toker, "High Power 20-100 MHz Linear and Efficient Power Amplifier Design", IEEE Transaction on Microwave Theory and Techniques, vol. 56, pp 2032-2039, Sept. 2008.

  22. S. Kurt, S. Demir, A. Hizal, "Zero Crossing Counter for Accuracy Improvement of FMCW Range Detection," Turkish Journal of Electrical Engineering and Computer Sciences, vol 16, no.2, 2008.

  23. K. Topalli, O. Aydin Civi, S. Demir, S. Koc, and T. Akin, "A Monolithic Phased Array using 3-bit Distributed RF MEMS Phase Shifters," IEEE Trans. Microwave Theory Tech. Techniques, vol.56, pp. 270-277, February 2008.

  24. M. Secmen, S. Demir and A. Hizal, "Dual-Polarized T/R Antenna System Suitable for FMCW Altimeter Radar Applications", IEE Proc.-Microw. Antennas Propag.,Vol 153, No 5, October 2006, pp 407-412.

  25. K. Topalli, M. Unlu, S. Demir, O. A. Civi, S. Koc, and T. Akin, "A New Approach for Modeling Distributed MEMS Transmission Lines", IEE Proc.-Microw. Antennas Propag., Vol. 153, No. 2, April 2006, pp. 152-162.

  26. A. Telli, S. Demir, M. Askar, "CMOS planar spiral inductor modeling and low noise amplifier design", Microelectronics Journal, Volume 37, Issue 1, January 2006, pp. 71-78.

  27. H. Coskun, A. Mutlu, S. Demir, "A Multi-tone Model of Complex Enveloped Signals and Its Application in Feedforward Circuit Analysis", IEEE Trans on Microwave Theory and Techniques, Volume: 53 Issue: 6, Part 2, June 2005, pp. 2171- 2178.

  28. S. Demir, "Comments on "A Different Perspective on Taper Efficiency for Array Antennas"", IEEE Trans on Antennas and Propagation, vol 53, March 2005.

  29. S. Demir, "Efficiency Calculation of Feed Structures and Optimum Number of Antenna Elements in a Sub Array For Highest G/T", IEEE Trans on Antennas and Propagation, vol 52, no 4, April 2004, pp. 1024-1029

  30. H. Coskun, S. Demir, "A Mathematical Characterization and Analysis of a Feedforward Circuit for CDMA Applications", IEEE Trans. on Microwave Theory and Tech., vol. 51, pp. 767-777, March 2003.

  31. S. Demir, "Design of Wideband Impedance Transformers", IEEE Antennas and Propagation Magazine, Vol 45, no5, Oct 2003, pp 71-72.

  32. S. Demir, 'Can Wilkinson Power Divider Be Replaced by a Novel Structure', Science Journal of Army Academy, vol. 1, no.1, pp. 69-80, 1999.

  33. S. Demir, C. Toker, 'Optimum Design of Feed Structures for high G/T Passive and Active Antenna Arrays', IEEE Trans. on Antennas and Propagation, vol. AP-47, pp. 443-452, March 1999.

    Translations

  34. Angus Kennedy, The Internet, Rough Guides, 1999, Internet, Dost Kitabevi, 2000.

    Patents

  35. 2009/09880 Proximity Fuze, TPE Faydali Model, Registration Date: 22.11.2010.

  36. WO 2011/034511, EP2478585, US 2012/0194296 A1, "Simultaneous Phase and Amplitude Control Using Triple Stub Topology and its Implementation using RF MEMS Technology".

    Invited Talks

    International Conferences

  37. Bayraktar, Omer; Sevinc, Yusuf; Civi, Ozlem Aydin; Demir, Simsek; Koc, Sencer; Ka-band phased array antenna with circular rim, 2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2015, pp. 2479-2480

  38. Bayraktar, O.; Kobal, E.; Sevinc, Y.; Cetintepe, C.; Comart, I.; Demirel, K.; Topalli, E.S.; Akin, T.; Demir, S.; Civi, O.A., "RF MEMS based millimeter wave phased array for short range communication," in Antennas and Propagation (EuCAP), 2015 9th European Conference on , vol., no., pp.1-5, 13-17 April 2015.

  39. Suna, Gonca; Akkul, Mustafa; Demir, Şimşek; Yıldırım, Nevzat; Comparison of efficient power combining techniques, Radio Science Meeting (Joint with AP-S Symposium), 2014 USNC-URSI, 2014, p. 216.

  40. Suna, Gonca; Eker, Taylan; Akkul, Mustafa; Incebacak, Mustafa; Demir, Simsek; Yildirim, Nevzat; 15 W power amplifier modules using coaxial waveguide combining by planar probes, 2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2014, pp. 647-648.

  41. Yuzer, Ahmet Hayrettin; Bassam, Seyed Aidin; Ghannouchi, Fadhel M; Demir, S; Memory polynomial with shaped memory delay profile and modeling the thermal memory effect, Electronics, Circuits, and Systems (ICECS), 2013 IEEE 20th International Conference on, 2013, pp. 585-588.

  42. Hizal, A., Demir, S., “Pulsed FMCW Waveform Design for LPI Radars Based on Stretch Processing”, European Radar Conference, Amsterdam, Netherlands, Oct. 2012.

  43. K. K. Tokgöz,Ç. Çetintepe, S. Demir, “1-6GHz UWB Phase Shifter Design and Implementation with Surface Micromachining”, Antennas and Propagation (EUCAP), 2012 6th European Conference on , vol., no., pp.2933-2937, 26-30 March 2012.

  44. Ozgehan Kiliç, Ilker Comart, Simsek Demir, Tayfun Akin, “3-bit CPW Phase Shifter Implemented by a Reduced Branch Line Coupler”, 13th MEMSWAVE, Antalya, Turkey, 2012.

  45. Ilker Comart, Çagri Çetintepe,Simsek Demir, Tayfun Akin, “A 35GHz High Isolation RF MEMS SPDT Switch”, 13th MEMSWAVE, Antalya, Turkey, 2012.

  46. Çagri Çetintepe, Kaan Demirel, Simsek Demir, Tayfun Akin, “A 5-bit DMTL Phase Shifter with Analog Tuning Capabilities” , 13th MEMSWAVE, Antalya, Turkey, 2012.

  47. Korkut Kaan Tokgöz, Simsek Demir, Tayfun Akin, “Surface Micromachining Implementation of S-Band 4-bit Phase Shifter”, 13th MEMSWAVE, Antalya, Turkey, 2012.

  48. Ronaghzadeh, A., Demir, S.,"Efficiency improvement of power amplifiers without degraded linearity using a new topology and control method", 2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011, August 2011.

  49. Mohammadi, P., Demir, S., "Two layers substrate integrated waveguide power divider",2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011, August 2011.

  50. Civi, O.A., Demir, S., Akin, T., "Reconfigurable antennas using RF-MEMS research in Turkey", (2011) IEEE MTT-S International Microwave Symposium Digest.

  51. Ozgehan Sahin and Simsek Demir, "Design of a Two Layer Aperture-Coupled Unequal Power Divider", 10th Mediterranean Microwave Symposium, METU NCC, Güzelyurt,NCTR, August 25-27, 2010.

  52. Gokhan Boyacioglu and Simsek Demir, "Wideband Phase Shifter Design using Lange Coupler and Radial Stubs",10th Mediterranean Microwave Symposium, METU NCC, Güzelyurt,NCTR, August 25-27, 2010.

  53. Eser Erkek and Simsek Demir,"S-Band Hybrid 4 Bit Phase Shifter", 10th Mediterranean Microwave Symposium, METU NCC, Güzelyurt,NCTR, August 25-27, 2010.

  54. Caner Guclu, Cagri Cetintepe, Ozlem Aydin Civi,Simsek Demir and Tayfun Akin, "35 GHz Phased Array Antenna using DMTL Phase Shifters", 10th Mediterranean Microwave Symposium, METU NCC, Güzelyurt,NCTR, August 25-27, 2010.

  55. Ahmet Hayrettin Yuzer and Simsek Demir, "A Nonlinear Model for Amplifiers with Memory", 10th Mediterranean Microwave Symposium, METU NCC, Güzelyurt,NCTR, August 25-27, 2010.

  56. Hakki Ilhan Altan, Özlem Aydin Civi and Simsek Demir, "X-Band High Power Ferrite Phase Shifter",10th Mediterranean Microwave Symposium, METU NCC, Güzelyurt,NCTR, August 25-27, 2010.

  57. Ozgehan Sahin and Simsek Demir, "Design of a Defected Ground Beam Forming Network", 10th Mediterranean Microwave Symposium, METU NCC, Güzelyurt,NCTR, August 25-27, 2010.

  58. Ozan Dogan Gürbüz, Kagan Topalli, Mehmet Ünlü, Simsek Demir, Tayfun Akin, “A 35 GHz Coplanar Waveguide Power Divider”, 10th Mediterranean Microwave Symposium, METU NCC, Güzelyurt,NCTR, August 25-27, 2010.

  59. A. H. Yuzer, S. Demir, "Behavioral Modeling of Asymmetric Intermodulation Distortion of Nonlinear Amplifier", PIERS 2010, Cambridge, USA, July 2010.

  60. A. H. Yuzer, S. Demir, "A New Phase Measurement Technique for RF Power Amplifier Only Measuring Magnitudes" , PIERS 2010, Cambridge, USA, July 2010.

  61. T. Eker, S. Demir, A. Hizal, "Design and Implementation of Frequency Diverse Array (FDA) using Linear Frequency Modulated Continuous Waveform (LFMCW)", Int. Symp. on Microwave and Optical Tech., ISMOT 2009, New Delhi, India, Dec. 16-19, 2009.

  62. A. H. Yüzer, S. Demir, "Improved Behavioral Modeling of Nonlinear Amplifiers with Phase Asymmetry", 5th International Advanced Technologies Symposium (IATS’09), May 13-15, 2009, Karabuk, Turkey, pp. 580-584.

  63. K. Topalli, O. Bayraktar, M. Unlu, O. Aydin Civi, S. Demir, and T. Akin, "Reconfigurable antennas by RF MEMS technology", 30th ESA Antenna Workshop on Antennas for Earth Observation, Science, Telecommunications and Navigation Space Missions, pp.497-500, Noordwijk, The Netherlands, 27-30 May 2008

  64. K. Topalli, M. Ünlü, I. Istanbulluoglu, H. I. Atasoy, Ö. Bayraktar, Ö. Aydin Çivi, S. Demir, S. Koç, and T. Akin, "Reconfigurable RF MEMS Devices and Antennas," 5th International Conference on Electrical and Electronics Engineering (ELECO 2007), pp.204-209, Bursa, Turkey, 5-9 December 2007.

  65. Bayraktar, O.; Topalli, K.; Unlu, M.; Civi, O. Aydin; Demir, S.; Akin, T., "Beam Switching Reflectarray using RF MEMS Technology",2007 European Conference on Antennas and Propagation, EuCAP 2007, Edinburgh, UK.

  66. M Secmen, S Demir, A Hizal, O A Civi, "An Elliptically Polarized Axial-Mode Helical Antenna with a Conformal Polarizer" 2007 European Conference on Antennas and Propagation, EuCAP 2007, Edinburgh, UK.

  67. K. Topalli, O. Aydin Civi, S. Demir, S. Koc ve T. Akin, "Dual-Frequency Reconfigurable Slot Dipole Array with a CPW-Based Feed Network using RF MEMS Technology for X- and Ku-Band Applications," 2007 IEEE AP-S International Symposium, June 10-15, 2007.

  68. M. Unlu, H. I. Atasoy, S. Demir, O. A. Civi, S. Koc ve T. Akin, "Double Stub and Triple Stub RF MEMS Impedance Tuners," 2007 MEMSWAVE International Conference, Barcelona, 2007.

  69. K. Topalli, O. A. Civi, S. Demir, S. Koc ve T. Akin, "Monolithically Integrated MEMS Phased Array," 2007 MEMSWAVE International Conference, Barcelona, 2007.

  70. E.U. Temocin, H.I. Atasoy, M. Unlu, K. Topalli, I. Istanbulluoglu, O. Bayraktar, S. Demir, O.A. Civi, S. Koc, T. Akin, “Planar Spiral Inductors with MEMS Technology”, 2007 MEMSWAVE International Conference, Barcelona, 2007.

  71. Secmen, M.; Demir, S.; Hizal, A.; Eker, T.,"Frequency Diverse Array Antenna with Periodic Time Modulated Pattern in Range and Angle",IEEE Radar Conference 2007, April 2007, pp 427-430.

  72. M. Secmen, S. Demir, L. Alatan, O. A. Civi, A. Hizal, "A Compact Corporate Probe Fed Antenna", Proc of 1st European Conference on Antennas and Propagation 2006.

  73. O. Bayraktar, K. Topalli, M. Unlu, I. Istanbulluoglu, E. U. Temocin, H. I. Atasoy, O. A. Civi, S. Demir, S. Koc, T. Akin, "Reconfigurable Reflectarray Using RF MEMS Technology", Proc of 1st European Conference on Antennas and Propagation 2006.

  74. E. Erdil, K. Topalli, M. Unlu, I. Istanbulluoglu, E. U. Temocin,H I. Atasoy, O. Bayraktar, O. A. Civi, S. Demir, S S. Koc, T. Akin, "Reconfigurable Slot Antenna with Fixed-Fixed Beam Type RF MEMS Capacitors", Proc of 1st European Conference on Antennas and Propagation 2006.

  75. M. Unlu, K. Topalli, H. I. Atasoy, E. U. Temocin, I. Istanbulluoglu, O. Bayraktar, S. Demir, O. A. Civi, S. Koc, and T. Akin, "A Reconfigurable RF MEMS Triple Stub Impedance Matching Network", 2006 European Microwave Conference, EUMC 2006, Manchester, UK, September 2006, pp. 1370-1373.

  76. H. I. Atasoy, M. Unlu, K. Topalli, I. Istanbulluoglu, E.U. Temocin, O. Bayraktar, S.Demir, O. Civi, S. Koc, and T. Akin, "Investigation of On-Wafer TRL Calibration Accuracy Dependence on Transitions and Probe Positioning", 2006 European Microwave Conference, EUMC 2006, Manchester, UK, September 2006, pp. 1582-1585.

  77. S. Onat, L. Alatan, S. Demir, "Design and Implementation of a Triple-Band Re-Configurable Microstrip Antenna", 2006 European Conference on Wireless Technology, ECWT 2006, Manchester, UK, Sept 2006.

  78. H.I.Atasoy, K.Topalli, M.Unlu, I.Istanbulluoglu, E.U.Temocin, O.Bayraktar, S.Demir, O.A.Civi, S.Koc and T.Akin, "Metal-to-Metal and Capacitive Contact RF MEMS Shunt Switch Structures", in Proc of MEMSWAVE 2006, pp. 154-156, June 2006, Orvieto, Italy.

  79. M. Unlu, K. Topalli, H. I. Atasoy, E. U. Temocin, I. Istanbulluoglu, O. Bayraktar, S. Demir, O. A. Civi, S. Koc, and T. Akin, "A Reconfigurable RF MEMS Impedance Tuner for Impedance Matching of a Two-Stage Low Noise Amplifier", in Proc of MEMSWAVE 2006, pp. 115-118, June 2006, Orvieto, Italy.

  80. K. Topalli, M.Unlu, O. Aydin Civi, S. Demir, S.Koc, T.Akin "A Monolithic Phased Array using 3-bit DMTL RF MEMS Phase Shifters" IEEE Antennas and Propagation Society International Symposium, 2006, pp 517-520

  81. M. Secmen, S. Demir, A. Hizal, N. Candan, "Comparison of the Detection Performance of an FMCW Coastal Surveillance Radar for V and H Polarizations", IRS2006, Int. Microwaev and Radar Symposium, Krakow, Poland, 24-26 May 2006, pp 291-294.

  82. K. Topalli, E. Erdil, S. Onat, M. Unlu, O. Aydin Civi, S. Demir, L. Alatan, T. Akin, "Reconfigurable dual frequency antennas by MEMS technology", Joint ICECom/COST 284 paper at ICECom in Dubrovnik, 12-14 Oct. 2005

  83. E.Erdil, S. Onat, K. Topalli, I. Istanbulluoglu, M. Unlu, S. Demir, L. Alatan, O. Aydin Civi, S. Koc, and T. Akin "Reconfigurable antenna structures using MEMS technology", MEMSWAVE 2005, Switzerland, June 2005, pp 35-38.

  84. Onat, S.; Unlu, M.; Alatan, L.; Demir, S.; Akin, T.,"Design of a re-configurable dual frequency microstrip antenna with integrated RF MEMS switches", IEEE Antennas and Propagation Society International Symposium, 2005, Volume: 2A 3-8 July 2005, pp 384- 387 vol. 2A

  85. K. Topalli, M. Unlu, S. Demir, O. Aydin Civi, S. Koc, and T. Akin, "A Parametric Modeling Study On Distributed Mems Transmission Lines", MEMSWAVE 2004, Sweden, June 2004, pp I13-I16.

  86. Topalli, K.; Unlu, M.; Sagkol, H.; Demir, S.; Civi, O.A.; Koc, S.; Akin, T, "A new model for distributed MEMS transmission lines", IEEE Antennas and Propagation Society Symposium, 2004, vol 3, USA, June 2004, pp 2855-2858.

  87. Onat, S.; Alatan, L.; Demir, S, "Design of triple-band reconfigurable microstrip antenna employing RF-MEMS switches", IEEE Antennas and Propagation Society Symposium, 2004, vol 2, USA, June 2004, pp 1812-1815.

  88. M. Unlu, K. Topalli, S. Demir, O. A. Civi, S. Koc, and T. Akin, "Design And Modeling Of A Reconfigurable Triple Stub Impedance Matching Network Using Distributed Mems Transmission Lines", MEMSWAVE 2004, Sweden, June 2004, pp I17-I20.

  89. Coskun, H.; Mutlu, A.; Demir, S, "An alternative multi-tone representation of complex signals for feedforward systems", IEEE Radio and Wireless Conference, 2004, USA, Sept 2004, pp 507-510.

  90. S. Demir, O. Civi, "A Different Perspective On Scan Blindness Of Antenna Arrays", Joint Spanish URSI/COST 284 Workshop in Barcelona, Spain, 8-10 Sep. 2004.

  91. S. Onat, L. Alatan, S. Demir, "The effect of slot shape & size on the dual-frequency operation of microstrip patch antenna and triple-band reconfigurable microstrip antenna with RF-MEMS switches", Joint Spanish URSI/COST 284 Workshop in Barcelona, 8-10 Sep. 2004.

  92. H. Coskun, A. Mutlu, S. Demir, "Presentation of a Multi-tone Model and Its Application to Feedforward Circuit Analysis", European Microwave Conference, EUMC 2004, Netherlands, Oct 2004, pp 209-212.

  93. M. Unlu, K. Topalli, S. Demir, O. Civi, S. Koc, T Akin, "A parametric modelling study on Distributed MEMS Transmission Lines", European Microwave Conference 2004, EUMC 2004, Netherlands, Oct 2004, pp 1157-1160.

  94. Telli, A.; Demir, S.; Askar, M., "Practical performance of planar spiral inductors", IEEE International Conference on Electronics, Circuits and Systems, 2004. ICECS 2004, Israel, Dec 2004, pp 487-490.

  95. K. Topalli, H. Sagkol, M. Ünlü, S. Onat, Ö. Aydin Çivi, S. Demir, S. Koç, L. Alatan, T. Akin, "Microwave Circuit Components and Reconfigurable Antennas Using RF MEMS Technology" Proceeding of 4th COST284 Management Committee Meeting & Workshop with INICA, 19 September 2003, Berlin-Germany (http://www.cost284.com/).

  96. S. Demir, "Antenna Array Feed Network Topology Determination with Frequency Bandwidth Considerations", 2003 IEEE Int. Antennas and Propagation Symposium, June 22-27, 2003, Ohio, USA, Vol 3., pp 942-945.

  97. S. Demir, "Matching Circuit Design Using Ant Colony Optimization Method", 2003 IEEE Int. Antennas and Propagation Symposium, June 22-27, 2003, Ohio, USA, Vol 2, pp 84-87.

  98. A. H. Coskun, S. Demir, "A CDMA System Wideband Feedforward Linearizer Design Based on an Analytical Model", 2003 RAWCON Conference, August 10-13, 2003, Boston, USA, pp. 191-194.

  99. A. H. Coskun, S. Demir, "Application of an Analytical Model to an Actual CDMA System Feedforward Linearizer", 2003 European Microwave Conference, EUMW 2003, Munich, Germany, pp. 773-776.

  100. A. Telli, S. Demir, M. Askar, "Planar Spiral Inductor Modelling For RFIC Design", 2003 International Conference on VLSI, Las Vegas, Nevada, USA, pp.138-142.

  101. E. Turan, S. Demir, "An All 50 Ohm Divider/Combiner Structure", Proceedings of IEEE MTT International Microwave Symposium, Seattle, 2002, pp. 105-108.

  102. A. Cemil, S. Demir, "An Approach of Thinning Planar Phased Array Antenna by Using Finite Difference Method", Proceedings of IEEE AP-S International Symposium, Texas, 2002, Vol. I, pp. 632-635.

  103. M. Unlu, K. Topalli, H. Sagkol, S.Demir, O. A. Civi, S. S. Koc, T. Akin, "RF MEMS Adjustable Impedance Matching Network and Adjustable Power Divider", Proceedings of IEEE AP-S International Symposium, Texas, 2002, Vol II, pp. 26-29.

  104. S. Demir, "A Better Approximation of Small Reflections For Synthesis of Impedance Matching Networks For Antenna Arrays", Proceedings of IEEE AP-S International Symposium, Texas, 2002, Vol. III, pp. 802-805.

  105. H. Sagkol, K. Topalli, M. Unlu, O. A. Civi, S. S. Koc, S.Demir T. Akin, "A Monolithic Phased Array With RF MEMS Technology", Proceedings of IEEE AP-S International Symposium, Texas, 2002, Vol. IV, pp. 760-763.

  106. M. Unlu, K. Topalli, H. Sagkol, S.Demir, O. A. Civi, S. S. Koc, T. Akin, "New MEMS Switch Structures For Antenna Applications", Digest of USNC/URSI National Radio Science Meeting, Texas, 2002, p134.

  107. A. Celebi, S. Demir, N. Günalp, C. Toker, 'Systematic Extraction and Scaling of TOM Parameters for GaAs MESFETs', Proceedings of the 8th International Symposium on Microwave and Optical Technology, Quebec, Canada, June 19-23, 2001, pp.127-130 .

  108. S. Demir, C. Toker, A. Hizal, 'Noise in the Presence of Coupling Among Antenna Elements' , 28th European Microwave Conference, EUMC 98, Amsterdam, the Netherlands, 5-9 Oct. 1998, pp. 612-617.

  109. S. Demir, 'Optimum Number of Antenna Elements in a Sub Array for Highest G/T', Proceedings of IEEE AP-S International Symposium, Atlanta, 1998, pp. 1192-1195.

  110. S. Demir, C. Toker, 'Antenna Array Feed Network Efficiency and the Antenna Noise Temperature' , 1998 URSI Int.Symp. on Electromagnetic Theory, Thessaloniki, Greece, 25-28 May 1998, pp. 118-120.

  111. S. Demir, C. Toker, A. Hizal, 'A Novel Low Noise Active Circuit Replacement Criteria for Parallel Fed Large Scale Active Antenna Arrays' , 27th European Microwave Conference, EUMC 97, Jerusalem, Israel, 8-12 Sept. 1997, pp. 56-61.

  112. S. Demir, C. Toker, A. Hizal, 'Design of an Active Microstrip Array Using a Microwave Circuit Simulator', IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications, Vancouver, BC, Canada, 23-26 Feb. 1997, pp 103-106.

  113. S. Demir, C. Toker, A. Hizal, 'Active Circuit Design to be Used in Conjunction with a Microstrip Patch Array Antenna', COST 245 ESA Workshop on Active Antennas, 1996.

  114. A. Hizal, S. Demir, L. Alatan, C.Bulutay, H. Yildiz, 'Performance of a 10GHz 32 Elements Receiving Planar Microstrip Array', COST 245 ESA Workshop on Active Antennas, 1996, pp. 205-209.


    National Conferences

  115. Ilker Comart, Simsek Demir, Tayfun Akin, "RF MEMS Teknolojisi Tabanli 12 GHZ ve 26 GHZ Çalisma Frekanslarinda Tek Giris Çift Çikis Anahtar Yapilari", URSI Ulusal Konferansi 2010, ODTU KKK, Güzelyurt, Kuzey Kibris Türk Cumhuriyeti, 25-27 Agustos 2010.

  116. Eser Erkek, Simsek Demir, "Üretim Ve Montaj Teknikleri :le Malzemelerin Tolerans Degerlerinin Tekrarlanabilirlik Üzerindeki Etkileri", URSI Ulusal Konferansi 2010, ODTU KKK, Güzelyurt, Kuzey Kibris Türk Cumhuriyeti, 25-27 Agustos 2010.

  117. Gökhan Boyacioglu, Simsek Demir, "Lange Baglaç ve Radyal Saplama Kullanimi :le Genis Bant Faz Kaydirici Tasarimi", URSI Ulusal Konferansi 2010, ODTU KKK, Güzelyurt, Kuzey Kibris Türk Cumhuriyeti, 25-27 Agustos 2010.

  118. Çagri Çetintepe, Ozan Dogan Gürbüz, Kagan Topalli, Mehmet Ünlü, Simsek Demir, Tayfun Akin, "Ka-Frekans Bandi için RF MEMS Paralel, Sigal-Degeçli Anahtar", URSI Ulusal Konferansi 2010, ODTU KKK, Güzelyurt, Kuzey Kibris Türk Cumhuriyeti, 25-27 Agustos 2010.

  119. Hakki Ilhan Altan, Özlem Aydin Çivi, Simsek Demir, "Ikiz-Toroid Yapidaki Ferit Faz Kaydiricilarda Yüksek Dereceli Modlarin Bastirilmasi", URSI Ulusal Konferansi 2010, ODTU KKK, Güzelyurt, Kuzey Kibris Türk Cumhuriyeti, 25-27 Agustos 2010.

  120. Erkek E., Boyacioglu G., Demir S., "Tüm-Geçiren Süzgeç yapisi ve Radyal stub kullanimi ile Cok Genis Bant Faz Kaydirici Tasarimlari",URSI Ulusal Konferansi 2008, Akdeniz Üniversitesi, Antalya, Türkiye, 20-22 Ekim 2008.

  121. Efe O., Demir S.,"Seri Bagli Reaktif Sonlandirilan Tek Asamada Dagitilmis 2-18 GHz Yükseltec", URSI Ulusal Konferansi 2008, Akdeniz Üniversitesi, Antalya, Türkiye, 20-22 Ekim 2008.

  122. Hakan Korkmaz, Simsek Demir, Bülent Sen, "Minyatür Baglaç ve Güç Bölücü Yapilari", URSI Ulusal Konferansi 2008, Akdeniz Üniversitesi, Antalya, Türkiye, 20-22 Ekim 2008.

  123. A. Hayrettin Yüzer, Simsek Demir, "Güç Yükselticilerde Davranissal Modelleme ile Arakipleme Bozulmasinin Modellenmesi", URSI Ulusal Konferansi 2008, Akdeniz Üniversitesi, Antalya, Türkiye, 20-22 Ekim 2008.

  124. Taylan EKER, Simsek Demir, Altunkan Hizal, "Frekans Kaymali Dizi Anteni Sisteminin Düzlemsel Frekans Modülasyonlu Isaret ile Gerçeklenmesi", URSI Ulusal Konferansi 2008, Akdeniz Üniversitesi, Antalya, Türkiye, 20-22 Ekim 2008.

  125. Cagri Cetintepe, Simsek Demir, Tayfun Akin, "RF MEMS Teknolojisi ile S-Bandi Tümlesik Bant-Geciren Filtre Yapisi", URSI Ulusal Konferansi 2008, Akdeniz Üniversitesi, Antalya, Türkiye, 20-22 Ekim 2008.

  126. Ilker Comart, Kagan Topalli, Simsek Demir, Tayfun Akin, "RF MEMS Yapilarin Glass Frit ile 0-Seviye Paketlemesi", URSI Ulusal Konferansi 2008, Akdeniz Üniversitesi, Antalya, Türkiye, 20-22 Ekim 2008.

  127. Ismail Bozkurt, Simsek Demir, "Aktif MIC ve MMIC Mikrodalga Frekans Carpici(x3) Tasarimi", URSI Ulusal Konferansi 2008, Akdeniz Üniversitesi, Antalya, Türkiye, 20-22 Ekim 2008.

  128. Hakki Ilhan Altan, Özlem Aydin Çivi, Simsek Demir, "Reggia-Spencer Ferrit Faz Kaydirici Tasarimi ve Üretimi", URSI Ulusal Konferansi 2008, Akdeniz Üniversitesi, Antalya, Türkiye, 20-22 Ekim 2008.

  129. Ayse Ünlü, Simsek Demir, "200-400MHz Vektör Modülatör Tasarim ve Üretimi", URSI Ulusal Konferansi 2008, Akdeniz Üniversitesi, Antalya, Türkiye, 20-22 Ekim 2008.

  130. Mustafa Seçmen, Simsek Demir, Altunkan Hizal, Kenan Çaglar, Eyüp Tongel, “E-Düzlem Sektörel Boynuz Anten Güç Bölücü”, URSI Ulusal Konferansi 2006, Hacettepe Üniversitesi, Ankara, Türkiye, 6-8 Eylül 2006, pp. 122-124.

  131. Erdinç Erçil, Simsek Demir, M. Erim Inal, “X Bant Tek Tabanli Mikrodalga Entegre Devre (MMIC) 7 Bit Faz Kaydirici Tasarimi”, URSI Ulusal Konferansi 2006, Hacettepe Üniversitesi, Ankara, Türkiye, 6-8 Eylül 2006, pp. 370-372.

  132. Necip Sahan, M. Erim Inal, Canan Toker, Simsek Demir, “Genis Bantli Iletim Hatti Yüksek Güç RF Empedans Çeviricileri ve Balun Yapilari”, URSI Ulusal Konferansi 2006, Hacettepe Üniversitesi, Ankara, Türkiye, 6-8 Eylül 2006, pp. 392-394.

  133. Mehmet Ünlü, Kagan Topalli, Simsek Demir, Özlem Aydin Çivi, Sencer Koç, Tayfun Akin, “RF MEMS Teknolojisi ile Ayarlanabilir Empedans Uyumlama Devresi”, URSI Ulusal Konferansi 2006, Hacettepe Üniversitesi, Ankara, Türkiye, 6-8 Eylül 2006, pp. 407-409.

  134. H. I. Atasoy, K. Topalli, M. Ünlü, I. Istanbulluoglu, E. U. Temoçin, Ö. Bayraktar, S. Demir, Ö. Aydin Çivi, S. Koç, T. Akin, “RF MEMS Tekonolojisi ile Kapasitif ve Metal-Metal Baglantili Paralel Anahtar Yapilari”, URSI Ulusal Konferansi 2006, Hacettepe Üniversitesi, Ankara, Türkiye, 6-8 Eylül 2006, pp. 410-412.

  135. Kagan Topalli, Mehmet Ünlü, Özlem Aydin Çivi, Simsek Demir, Sencer Koç, Tayfun Akin, “RF MEMS Teknolojisi ile Tek Parça Faz Dizili Anten Yapisi”, URSI Ulusal Konferansi 2006, Hacettepe Üniversitesi, Ankara, Türkiye, 6-8 Eylül 2006, pp. 413-415.

  136. I. Istanbulluoglu, K. Topalli, E. U. Temoçin, H. I. Atasoy, M. Ünlü, Ö. Bayraktar, S. Demir, Ö. Aydin Çivi, S. Koç, T. Akin, “RF MEMS Tekonolojisi Kullanilarak Tasarlanmis Ayarlanabilir Bant Geçiren Baglanmis-Hat Süzgeç”, URSI Ulusal Konferansi 2006, Hacettepe Üniversitesi, Ankara, Türkiye, 6-8 Eylül 2006, pp. 416-418.

  137. H. I. Atasoy, M. Ünlü, K. Topalli, I. Istanbulluoglu, E. U. Temoçin, Ö. Bayraktar, S. Demir, Ö. Aydin Çivi, S. Koç, T. Akin, “TRL Kalibrasyonunda Uç Konumlandirmasi ve Geçislerin Etkileri”, URSI Ulusal Konferansi 2006, Hacettepe Üniversitesi, Ankara, Türkiye, 6-8 Eylül 2006, pp. 426-428.

  138. Necip Sahan, M. Erim Inal, Canan Toker, Simsek Demir, “Ultra Genis Bant Yüksek Güçlü RF Güç Yükselteci”, URSI Ulusal Konferansi 2006, Hacettepe Üniversitesi, Ankara, Türkiye, 6-8 Eylül 2006, pp. 429-431.

  139. A. Hayrettin Yüzer, Simsek Demir, “Vektör Modülatör MMIC Uygulama Devreleri”, URSI Ulusal Konferansi 2006, Hacettepe Üniversitesi, Ankara, Türkiye, 6-8 Eylül 2006, pp. 432-434.

  140. Taylan Eker, M. Erim Inal, Simsek Demir, “Xband 20 Yollu, Es Fazli, Genlik Dagilimli, Kayipsiz Güç Bölücüsünün Mikroserit Teknolojisi ile Tasarimi”, URSI Ulusal Konferansi 2006, Hacettepe Üniversitesi, Ankara, Türkiye, 6-8 Eylül 2006, pp. 435-437.

  141. Ö. Bayraktar, K. Topalli, M. Ünlü, I. Istanbulluoglu, E. U. Temoçin, H. I. Atasoy, S. Demir, Ö. Aydin Çivi, S. Koç, T. Akin, “RF MEMS Teknolojisi ile Yansitici Dizi Anteni Tasarimi”, URSI Ulusal Konferansi 2006, Hacettepe Üniversitesi, Ankara, Türkiye, 6-8 Eylül 2006, pp. 438-440.

  142. E. U. Temoçin, K. Topalli, M. Ünlü, I. Istanbulluoglu, H. I. Atasoy, , Ö. Bayraktar, S. Demir, Ö. Aydin Çivi, S. Koç, T. Akin, “Esdüzlemsel Dalga Klavuzundan Mikroserit Hatta Geçis Üzerine Çalismalar”, URSI Ulusal Konferansi 2006, Hacettepe Üniversitesi, Ankara, Türkiye, 6-8 Eylül 2006, pp. 448-450.

  143. Hakan Coskun, Ahmet Mutlu, Simsek Demir, "Kompleks Zarfli Sinyallerin Alternatif Çok Tonlu Gösterimi ve Ileribesleme Sistemlerine Uygulamalari", URSI Ulusal Konferansi 2004, Bilkent Üniversitesi, Ankara, Turkiye, Eylül 2004, pp 358-360.

  144. Simsek Demir, Mustafa Seçmen, Altunkan Hizal, "FMCW Altimetre Radar Sistemlerinde Sirkülatör Kullanimina Alternatifler", URSI Ulusal Konferansi 2004, Bilkent Üniversitesi, Ankara, Turkiye, Eylül 2004, pp 152-154.

  145. Sinan ONAT , Simsek DEMIR, Lale ALATAN, "Farkli Yarik Sekilli Çift-Frekansli Mikroserit Yama Anten", URSI Ulusal Konferansi 2004, Bilkent Üniversitesi, Ankara, Turkiye, Eylül 2004, pp 354-356

  146. K. Topalli, M. Unlu, S. Demir, O Civi, S. Koc, T. Akin, "RF MEMS Teknolojisi ile Mikroserit ve Esdüzlemsel Dalga Klavuzu Hat Üstünde Paralel Anahtar Yapilari", URSI Ulusal Konferansi 2004, Bilkent Üniversitesi, Ankara, Turkiye, Eylül 2004, pp 370-372.

  147. Sinan ONAT, Lale ALATAN, Simsek DEMIR, "RF MEMS Anahtar Kontrollü Çoklu-Frekans Mikroserit Anten", URSI Ulusal Konferansi 2004, Bilkent Üniversitesi, Ankara, Turkiye, Eylül 2004, pp 99-101

  148. Yasemin YIGIT, Simsek DEMIR, "Kompozit Sag-Sol El Iletim Hatti ile Genis Yalitim Bantli 3dB Güç Bölücü/Birlestirici", URSI Ulusal Konferansi 2004, Bilkent Üniversitesi, Ankara, Turkiye, Eylül 2004, pp 367-370.

  149. K. Topalli, H. Sagkol, M. Unlu, O Civi, S. Demir, S. Koc, T. Akin, ”RF MEMS Teknolojisi ile Faz Dizili Anten”, URSI Ulusal Konferansi 2002, Istanbul, Turkiye, Eylül 2002, pp 134-137.

  150. H. Sagkol, M. Unlu, K. Topalli, O Civi, S. Demir, S. Koc, T. Akin, ”RF MEMS Teknolojisi ile Mikrodalga Faz Kaydiricilari”, URSI Ulusal Konferansi 2002, Istanbul, Turkiye, Eylül 2002, pp 138-141.

  151. M. Unlu, H. Sagkol, K. Topalli, O Civi, S. Demir, S. Koc, T. Akin, ”RF MEMS Teknolojisi ile Ayarlanabilir Empedans Uyumlama ve Güç Bölücü Devreleri”, URSI Ulusal Konferansi 2002, Istanbul, Turkiye, Eylül 2002, pp 142-145.

  152. M. Unlu, H. Sagkol, K. Topalli, O Civi, S. Demir, S. Koc, T. Akin, ”Anten uygulamalari için yeni MEMS anahtar Yapilari”, URSI Ulusal Konferansi 2002, Istanbul, Turkiye, Eylül 2002, pp 146-149.

  153. S. Demir, L. Alatan, Ö. Aydin, 'Alcak Yörünge Uydulari için Mobil Yer Istasyonu Antenleri (Mobile Ground Station Antennas for LEO Satellites - in Turkish)' , 1. Uluslararasi Uzay Sempozyumu Bildiri Kitabi, Ankara,Türkiye, 30-31 Mayis 2001, pp. 517-521.

  154. B. Kazandir, S. Yolcu, S. Demir, S. Camur, 'Elektromanyetik (EM) Tabanli Firlatma Sistemleri: Barut Teknolojisinden EM Teknolojilerine Geçis', Savunma Sempozyumu 2000, Türk Savunma Sanayii'nin Dünü, Bugünü, Yarini Sempozyumu Bildiri Kitabi, Ankara, Türkiye, 7-8 Kasim 2000, pp. 410-415.

  155. I. Durmus, A. Celebi, S. Demir, N. Günalp, C. Toker, 'MESFET Küçük Isaret Parametrelerinin Ölcüm yoluyla elde edilmesi (Obtaining MESFET Small Signal Model Parameters by Measurements - in Turkish)', Elektrik Elektronik Bilgisayar Mühendisliği 8. Ulusal Kongresi Bildiri Kitabi, Gaziantep Türkiye, 6-12 Eylül 1999, pp. 293-296.

  156. S. Demir, C. Toker, A. Hizal, 'A Novel Low Noise Active Antenna Array Analysis and Design Method', Electrical, Electronics and Computer Eng. 7. National Symp., Ankara, Turkey, 8-14 Sept. 1997, pp. 319-322 (in Turkish).

  157. S. Demir, C. Toker, 'Wideband Microwave Amplifier Design Using Feedback, MMIC Implementation and Measurement Results' , 6. National Electrical Eng. Symp., 1995 (in Turkish).

  158. S. Demir, C. Toker, 'Wideband Microwave Amplifier Design', 5. National Electrical Eng. Symp., 1993 (in Turkish).

  159. S. Demir, C. Bulutay, 'Wideband Microwave Amplifier Design Using Simulated Annealing' , 5. National Electrical Eng. Symp., 1993 (in Turkish).

    Technical Reports

  160. S. Demir, L. Alatan, Ö. Aydin, "A Phased Array Antenna Design for Mobile Satellite Communication", TÜBITAK-BILTEN Arastirma Projesi, Ankara, June 2001.

  161. T. Birand, G. Dural, T. Çiloglu, S. Demir, Uzaktan Algilama Radari için Anten Sistemi Sonuç Raporu, TÜBITAK-BILTEN Güdümlü Arastirma Projesi, Proje no 197E035 (EEE AG-BILTEN-228).

  162. S. Demir, "Final Report on Microstrip Receiver Beam Forming Network Studies in IRCTR", report nr. IRCTR-TD-002-99, TU Delft ITS-IRCTR, Delft, the Netherlands, March 12, 1999.

Last Update : September 12, 2006