Abstract:
This brief presents a novel frequency reconfigurable microstrip non-reciprocal bandpass filter based on time-modulated microstrip \lambda _{g}/2 resonators. The modul...Show MoreMetadata
Abstract:
This brief presents a novel frequency reconfigurable microstrip non-reciprocal bandpass filter based on time-modulated microstrip \lambda _{g}/2 resonators. The modulation is achieved by loading both ends of the \lambda _{g}/2 transmission line resonators with time-modulated capacitors. The modulation voltage source is connected at the center of the resonator, where there is a natural voltage null, and a single inductor is used to further enhance the biasing isolation. The wideband nature of this isolation scheme enables the tuning of the devices over a wide frequency range. With more than 30-dB RF to modulation isolation, the proposed resonator structure also enables low insertion loss by eliminating RF signal leakage to the modulation ports. A 3-pole bandpass filter example is simulated and measured, showing a minimal insertion loss of 3.9dB, a 20-dB isolation bandwidth of 42MHz at 1.0GHz, and frequency tuning range of 885–1031MHz.
Published in: IEEE Transactions on Circuits and Systems II: Express Briefs ( Volume: 68, Issue: 2, February 2021)
Funding Agency:
School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing, China
Department of Electrical and Computer Engineering, University of California at Davis, Davis, CA, USA
Department of Electrical and Computer Engineering, University of California at Davis, Davis, CA, USA
Department of Information and Communication Technologies, Technical University of Cartagena, Murcia, Spain
Department of Electrical and Computer Engineering, University of California at Davis, Davis, CA, USA
Department of Electrical and Computer Engineering, University of California at Davis, Davis, CA, USA
Contents School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing, China
Department of Electrical and Computer Engineering, University of California at Davis, Davis, CA, USA
Department of Electrical and Computer Engineering, University of California at Davis, Davis, CA, USA
Department of Information and Communication Technologies, Technical University of Cartagena, Murcia, Spain
Department of Electrical and Computer Engineering, University of California at Davis, Davis, CA, USA
Department of Electrical and Computer Engineering, University of California at Davis, Davis, CA, USA
