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Harmonic-Suppressed Hairpin Bandpass Filter for the Microwave Radiometer

마이크로파 라디오미터를 위한 하모닉 억제 특성을 가진 헤어핀 필터

  • 윤태순 (호남대학교 이동통신공학과)
  • Received : 2014.08.04
  • Accepted : 2014.10.17
  • Published : 2014.10.31

Abstract

In this paper, for improving the performance of selecting and the sensitivity of the L-Band microwave radiometer for remote sensing of soil-moisture, the harmonic-suppressed hairpin bandpass filter is described. As the harmonic frequencies of the SIR can be controlled by the ratio of the impedance and electrical length, SIRs are used in the hairpin BPF for suppressing harmonics. Manufactured harmonic-suppressed hairpin BPF has the SIRs of three types and its harmonic is suppressed under 35 [dB] until 5 times of the center frequency of 1390 [MHz].

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