Tunable Ring Resonator Filter for Duplexer
- 1 October 2008
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
This paper proposes a novel ring resonator filter that has tunable capabilities for the center frequency, bandwidth, and out-of-band characteristic. The filter comprises ring resonators, switches, and tunable reactive elements such as varactors and tunable stubs. The newly proposed ring resonator incorporates varactors and switches that are connected to tunable elements. The varactors are used to change the center frequency. The point of the proposed filter is that the bandwidth can be varied without varying the center frequency, and the tunable elements make the skirt characteristics near the center frequency to be asymmetric with respect to the center frequency, which is suitable for constructing duplexers.Keywords
This publication has 7 references indexed in Scilit:
- Center Frequency and Bandwidth Tunable Filter Employing Tunable Comb-Shaped Transmission Line Resonators and J-invertersPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2006
- Wide tuning-range planar filters using lumped-distributed coupled resonatorsIEEE Transactions on Microwave Theory and Techniques, 2005
- 6-15 GHz RF MEMS tunable filtersPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Bandwidth and central frequency control on tunable bandpass filter by using MEMS cantileversPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Tunable duplexer having multilayer structure using LTCCPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- A K-band (HTS,gold)/ferroelectric thin film/dielectric diplexer for a discriminator-locked tunable oscillatorIEEE Transactions on Applied Superconductivity, 1999
- Transmission-line analysis of a capacitively coupled microstrip-ring resonatorIEEE Transactions on Microwave Theory and Techniques, 1997