Design of compact adaptive rf matching circuits using square split ring resonators

Hyunjin Park, Kathleen L Melde, William R. Eisenstadt

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

One challenge in the design of an adaptive software defined match control (SDMC) circuits at low RF frequencies is miniaturization. By integrating the SDMC system with the antenna, the impedance of the circuit and input port of the antenna can be matched automatically. Miniaturization is natural at shorter wavelengths (in the millimeter wave bands), yet quite difficult at low RF frequencies (1-2GHz). Previous designs using loaded transmission line stubs, with tuning devices placed on the stubs, have demonstrated excellent tunabilty, but are too large [1]-[4]. Moderate size reduction can be achieved by fabricating the SDMC circuits on high εr materials and by folding the stubs. This paper presents the design of SDMC circuits using square split ring resonators (SSRRs). SSRRs are highly coupled transmission line structures that consist of two coupled rings and are electrically small resonators of coupled LC elements. Varactor diodes are placed at the open ends of each coupled ring. Prior works on tunable SSRR structures have focused on adaptive filters that are designed for a 50 Ω input and output impedances. SDMCs, on the other hand, use a 50 Ω input impedance and a frequency dependent output impedance to fulfill the difficult task of matching the reactive part of the antenna impedance. The use of SDMCs with SSRRs requires innovative approaches in order to integrate and isolate the diode bias control circuits. This approach uses vertical interconnects are used to create the bias circuits.

Original languageEnglish (US)
Title of host publication2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010
DOIs
StatePublished - 2010
Event2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010 - Toronto, ON, Canada
Duration: Jul 11 2010Jul 17 2010

Other

Other2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010
CountryCanada
CityToronto, ON
Period7/11/107/17/10

Fingerprint

Resonators
Networks (circuits)
Antennas
Electric lines
Diodes
Varactors
Adaptive filters
Millimeter waves
Tuning
Control systems
Wavelength

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture

Cite this

Park, H., Melde, K. L., & Eisenstadt, W. R. (2010). Design of compact adaptive rf matching circuits using square split ring resonators. In 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010 [5561991] https://doi.org/10.1109/APS.2010.5561991

Design of compact adaptive rf matching circuits using square split ring resonators. / Park, Hyunjin; Melde, Kathleen L; Eisenstadt, William R.

2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010. 2010. 5561991.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Park, H, Melde, KL & Eisenstadt, WR 2010, Design of compact adaptive rf matching circuits using square split ring resonators. in 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010., 5561991, 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010, Toronto, ON, Canada, 7/11/10. https://doi.org/10.1109/APS.2010.5561991
Park H, Melde KL, Eisenstadt WR. Design of compact adaptive rf matching circuits using square split ring resonators. In 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010. 2010. 5561991 https://doi.org/10.1109/APS.2010.5561991
Park, Hyunjin ; Melde, Kathleen L ; Eisenstadt, William R. / Design of compact adaptive rf matching circuits using square split ring resonators. 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010. 2010.
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