• Title, Summary, Keyword: 헤어핀공진기

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Design and Fabrication of A Doppler Radar for Motion Detector Using Frequency Tunable Hairpin Resonator (주파수 가변형 헤어핀공진기를 이용한 동작감지용 도플러 레이더센서의 제작 및 설계)

  • Kim, Eun-Su;Kim, Gue-Chol
    • The Journal of the Korea institute of electronic communication sciences
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    • v.13 no.5
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    • pp.931-936
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    • 2018
  • We designed an x-band radar for motion detector using a frequency tunable hairpin ring resonator. The proposed doppler radar sensor can vary the oscillation frequency by applying a hairpin resonator using a varactor diode to the oscillator, and this can also reduce the size by transmitting and receiving a signal from Tx/Rx dual antenna. The fabricated doppler radar sensor was fabricated in $30{\times}24mm$, and it was confirmed that the pulse width difference occurred according to the distance from the object. The measurement results showed oscillation at 10.525GHz. We confirmed that it is enough to use as radar for motion detection from the measured results.

Microstrip Bandpass Filter for Spurious Resonant Mode Rejection using Metameterial Transmission Line (메타매질 전송선로를 이용한 불요 공진모드 제거용 마이크로스트립 대역통과 필터)

  • Yang, Doo-Yeong;Lee, Min-Soo
    • The Journal of the Korea Contents Association
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    • v.9 no.12
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    • pp.566-571
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    • 2009
  • In this paper, microstrip bandpass filter combined DCRLH metameterial-cells with a hairpin resonator is designed and fabricated to be transferred only fundamental passband signal, and removed a spurious resonant mode occurring when filter design using a microstrip transmission line is done. The bandpass filter is composed of CCRLH hairpin resonator and DCRLH interdigit metameterial-cells. The hairpin resonator with CCRLH property is implemented between two DCRLH interdigit metameterial-cells with DCRLH property, which is parallel to input port and output port. The interdigit metameterial-cells suppress spurious harmonics occurring on the higher order frequency and improve a filter performance. Insertion loss of the fabricated microstrip bandpass filter on the passband from 1.91GHz to 2.41GHz is 0.2dB, and attenuation on the stopband from 3GHz to 7.7GHz is bellower than -30dB. Therefore, this filter has a good performance for both mobile communications of WCDMA and wireless internet of WiBro.

A Study on Design and Fabrication on X-Band Oscillator for radar system (레이더 시스템용 X-Band 발진기의 설계 및 제작에 관한 연구)

  • 손병문;강중순
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.5 no.7
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    • pp.1210-1218
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    • 2001
  • In this paper, A X-band voltage-controlled hair-pin resonator oscillator(VCHRO) is able to a local oscillator or a signal source in transmitter/receiver of a microwave communication system for mobile radar, is designed and fabricated In order to apply mobile radar system is used the hair-pin resonator stronger on shock or vibration than the dielectric resonator, and also, in order to improvement the phase noise and output power is used a system of serial feedback format A hair-pin resonator was simulated by momentum method of HP ADS and then a oscillator circuit was designed that operates at 10.525 GHz by nonlinear method in harmonic balance simulation. The HRO generated output power of 6.93 dBm at 10.525 GHz, phase noise of -57.74 dBc at 100 kHz offset from carrier and the 2'nd harmonic was suppressed -23.90 dBc.

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