TY - GEN
T1 - Reconfigurable-order bandpass filter for frequency agile systems
AU - Sigmarsson, Hjalti H.
AU - Lee, Juseop
AU - Peroulis, Dimitrios
AU - Chappell, William J.
PY - 2010
Y1 - 2010
N2 - This paper presents a tunable bandpass filter with a reconfigurable filter order. The proposed filter consists of an array of tunable resonators with variable inter-resonator coupling structures between adjacent cavities. This allows the frequency selectivity of the filter to be adjusted for the given spectral environment without any geometrical modifications to the filter structure. To demonstrate the concept a 2 × 2 resonator array is fabricated using substrate integrated evanescent-mode cavity resonators at 3.2 GHz. Each resonator has an adjustable frequency response and can be tuned from 2.77 to 3.55 GHz. The filter has two separate signal paths, either through two or four resonators. The reconfigurable inter-resonator coupling is implemented with floating vias inside a coupling iris. The vias are connected using variable capacitors and can be included or excluded from the iris by adjusting the capacitance. This structure shows the potential for the inclusion of reconfigurable-order filters in future agile radio systems.
AB - This paper presents a tunable bandpass filter with a reconfigurable filter order. The proposed filter consists of an array of tunable resonators with variable inter-resonator coupling structures between adjacent cavities. This allows the frequency selectivity of the filter to be adjusted for the given spectral environment without any geometrical modifications to the filter structure. To demonstrate the concept a 2 × 2 resonator array is fabricated using substrate integrated evanescent-mode cavity resonators at 3.2 GHz. Each resonator has an adjustable frequency response and can be tuned from 2.77 to 3.55 GHz. The filter has two separate signal paths, either through two or four resonators. The reconfigurable inter-resonator coupling is implemented with floating vias inside a coupling iris. The vias are connected using variable capacitors and can be included or excluded from the iris by adjusting the capacitance. This structure shows the potential for the inclusion of reconfigurable-order filters in future agile radio systems.
KW - Bandpass filters
KW - Cavity filters
KW - Evanescent-mode filters
KW - Tunable filters
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U2 - 10.1109/MWSYM.2010.5518024
DO - 10.1109/MWSYM.2010.5518024
M3 - Conference contribution
AN - SCOPUS:77957809565
SN - 9781424477326
T3 - IEEE MTT-S International Microwave Symposium Digest
SP - 1756
EP - 1759
BT - 2010 IEEE MTT-S International Microwave Symposium, MTT 2010
T2 - 2010 IEEE MTT-S International Microwave Symposium, MTT 2010
Y2 - 23 May 2010 through 28 May 2010
ER -