Alternative Architectures for Narrowband Varactor-Tuned Bandpass Filters
NAVAL RESEARCH LAB WASHINGTON DC
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A unique design approach for narrowband tunable bandpass filters is presented which focuses on engineering the tuned center-frequency dependence of the coupling coefficient between adjacent resonators. New architectures are presented and equations for the coupling coefficient are derived from energy expressions. A microstrip prototype with independentlytunable center frequency and bandwidth was built and tested and exhibits excellent performance.
- Electrical and Electronic Equipment
- Radiofrequency Wave Propagation