Stripline bandpass filters with step-impedance resonators
DOI:
https://doi.org/10.3103/S0735272711030071Keywords:
stripline, step-impedance resonator, bandpass filter, frequency responseAbstract
Research results for stripline bandpass filters with step-impedance resonators formed on Al2O3 (Alumina, polycor) and operating in the frequency band 1500–2500 MHz are presented in this article. Use of step-impedance resonators breaks repetition factor in frequency positioning of passbands in such filters. This allows suppressing harmonics of output signal in transmitters and widening stopband for parasitic signals in receivers.
References
G. L. Matthaei, L. Young, and Е. М. Т. Jones, Microwave Filters, Impedance-Matching Networks, and Coupling Structures (McGraw-Hill, New York–San Francisco–Toronto–London, 1964; Svyaz’, Moscow, 1971).
J.–S. Hong and M. J. Lancaster, Microstrip Filters for RF. Microwave Application (Wiley, New York, 2001).
M. Sagawa, M. Makimoto, and S. A. Yamashita, “Design Method of Bandpass Filters Using Dielectric-Filled Coaxial Resonators,” IEEE Trans. 33, No. 2, 152 (1985).
K. Hano and K. A. Savamoto, “Bandpass Filter Using Direct–Coupled quarter–wavelength Coaxial Dielectric Resonator,” Microwave Journal, No. 11, 141 (1987).
А. L. Feldstein (ed.), Handbook on Elements of Microstrip Devices (Svyaz’, Moscow, 1979) [in Russian].
