@article{jin_ortiz_mortazawi_2004, title={Design and performance of a new digital phase shifter at X-band}, volume={14}, ISSN={["1531-1309"]}, DOI={10.1109/LMWC.2004.832049}, abstractNote={A new digital phase shifter design at X-band is presented. The phase shifter operates based on converting a microstrip line to a rectangular waveguide and thus achieving the phase shift by changing the wave propagation constant through the medium. As a proof of principle, a 3-b phase shifter has been designed and constructed using PIN diode switches. An average insertion loss of 1.95 dB and phase shift error of less than 4/spl deg/ at 10.6 GHz are achieved.}, number={9}, journal={IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS}, author={Jin, Z and Ortiz, S and Mortazawi, A}, year={2004}, month={Sep}, pages={428–430} }
 @article{tombak_maria_ayguavives_jin_stauf_kingon_mortazawi_2003, title={Voltage-controlled RF filters employing thin-film barium-strontium-titanate tunable capacitors}, volume={51}, ISSN={["1557-9670"]}, DOI={10.1109/TMTT.2002.807822}, abstractNote={Tunable lowpass and bandpass lumped-element filters employing barium-strontium-titanate (BST)-based capacitors are presented. A new metallization technique is used, which improves the quality factor of the tunable BST capacitors by a factor of two. The lowpass filter has an insertion loss of 2 dB and a tunability of 40% (120-170 MHz) with the application of 0-9 V DC bias. The bandpass filter (BPF) has an insertion loss of 3 dB and a tunability of 57% (176-276 MHz) with the application of 0-6 V DC. The third-order intercept point of the BPF was measured to be 19 dBm with the application of two tones around 170 MHz.}, number={2}, journal={IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES}, author={Tombak, A and Maria, JP and Ayguavives, FT and Jin, Z and Stauf, GT and Kingon, AI and Mortazawi, A}, year={2003}, month={Feb}, pages={462–467} }