Abstract
The theory of bandpass-to-bandstop reconfigurable filters is developed in this work, and example filters are demonstrated. Designs are developed that allow for reconfigurable response shape and independent bandwidths in the bandpass and bandstop modes of the filter. These capabilities could potentially be useful in dynamic, open spectrums, concurrent transmit-receive systems, and multimode antenna array applications. The demonstrated filters were fabricated using substrate integrated evanescent-mode cavity resonators. The resonators are tuned using deformation of a copper membrane induced by a piezoelectric actuator. In measurement, a 1.06% 3-dB bandwidth bandpass filter with 2.6-dB passband insertion loss was switched to a 0.82% 3-dB S11 bandwidth bandstop filter with 45 dB of isolation.
Original language | English |
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Article number | 5634149 |
Pages (from-to) | 3770-3779 |
Number of pages | 10 |
Journal | IEEE Transactions on Microwave Theory and Techniques |
Volume | 58 |
Issue number | 12 PART 1 |
DOIs | |
Publication status | Published - 2010 Dec |
Externally published | Yes |
Keywords
- Adaptive filters
- cavity resonator filters
- elliptic filters
- switched filters
- tunable filters
ASJC Scopus subject areas
- Radiation
- Condensed Matter Physics
- Electrical and Electronic Engineering