| Autor: |
U-Yen, Kongpop, Wollack, Edward J., Doiron, Terence A., Papapolymerou, John, Laskar, Joy |
| Předmět: |
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| Zdroj: |
IEEE Transactions on Microwave Theory & Techniques; Mar2006, Vol. 54 Issue 3, p1237-1244, 8p, 5 Black and White Photographs, 1 Chart, 10 Graphs |
| Abstrakt: |
In this paper, we propose a compact planar bandpass filter design with wide stopband. The double split-end quarter-wave-length (03BB/4) resonator is introduced to reduce the resonator size while providing additional transmission zeros. Optimal split-end length is determined to provide transmission zeros that attenuate the two lowest spurious resonance frequencies. The singly loaded quality factor (Qsi) of the optimal-length 03BB/4 stepped-impedance resonator (SIR) is also analytically derived. Using the proposed technique to design an Nth-order filter, N + 1 controllable transmission zeros are generated and used to suppress spurious frequency responses. The experimental design shows that the sixth-order filter can provide a very broad stopband of 8.5 times the fundamental frequency with at least 37.8 dB of attenuation using the SIRs with a stepped-impedance ratio (R) of 0.528. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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