• Title, Summary, Keyword: 마이크로스트립 대역통과필터

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Design of Coupled Microstrip BandPass Filter on Composite Dielectric Substrate (복합 유전체기판상에 결합 마이크로스트립 대역통과필터의 설계)

  • 문승찬;김익수
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.26 no.8B
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    • pp.1041-1047
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    • 2001
  • 초고주파 회로에서 광범위하게 이용되는 평행 결합 마이크로스트립 대역통과필터는 2차 스프리어스 통과대역으로 필터의 응용을 제한한다. 이와 같은 문제를 해결하기 위해서 복합 유전체기판을 사용하는 방법을 제시하였다. closed-form 해석방법을 이용하여 복합 유전체기판상에 결합 마이크로스트립 선로를 해석하고 중심주파수 9GHz에서 정규화 대역폭 20%을 갖는 필터를 제작하였다. 단층기판을 갖는 필터와 비교하면 복합기판을 이용한 필터는 스프리어스 통과대역이 개선됨을 보였다.

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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.

Design of Asymmetrical Coupled Microstrip BandPass Filter on Composite Dielectric Substrate (복합 유전체기판상에 비대칭 결합 마이크로스트립 대역통과필터의 설계)

  • Kim Ik-Soo;Moon Seung-Chan
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.1A
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    • pp.77-83
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    • 2004
  • Parallel coupled microstrip bandpass filter is widely used in microwave circuits. But this filter limits the filter applications because of the narrow bandwidth and the spurious passband at twice the basic passband frequency. In order to solve this problem, a method of the asymmetrical coupled microstrip lines on composite dielectric substrate is presented. Closed form method is used to analyze the asymmetrical coupled microstrip lines on composite dielectric substrate. An experimental filter is fabricated over $33\%$ bandwidth centered at 9GHz. Compared with the filter on a single substrate, this filter on composite substrate shows improvement of the spurious passband.

Improvement of the Microstrip Patch Bandpass Filter using Interdigital Couping Structure and Embeded Slot (깍지 낀 결합 구조와 슬롯을 이용한 마이크로스트립 패치 대역통과필터의 특성 개선)

  • Kim, Hyun;Lim, Hyun-Jun;Yoon, Hyun-Bo
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.12 no.4
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    • pp.487-493
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    • 2001
  • In this paper, A new microstrip bandpass filter is proposed. The novelty of the proposed structures is to use a interdigital capacitor and embeded slot that are fanned on a patch resonator such that its insertion loss and size can be significantly reduced simultaneously. As a result, it is found that the resonant frequency of patch filter designed at 5 GHz is decreased to 1.8946 GHz and the insertion loss is reduced from -2.168 dB to -0.379 dB. This proposed filter has small size and low insertion loss in comparison with the conventional parallel edge coupled bandpass filter.

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A Study of Developing Band Pass Filter for Radio Astronomy Equipments (전파천문학 기기용 BPF의 개발에 관한 연구)

  • Lee Je-Hun;Kim Dong-Il;Che Seung-Hun;Song Young-Man
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • pp.121-125
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    • 2006
  • The frequency band $10.5GHz{\sim}10.7GHz$ provides some of the best angular resolutions that using many large and accurate radio telescopes. Developing high-performanced Bandpass Filter is needed for these equipments receive low power signals from the space. In this paper, Bandpass Filter for Radio Astronomy equipments is proposed. It is designed by Microstrip Line for good pass characteristic and suppressing unwanted signals. Center frequency is 10.6 GHz and band width is 5% of Center frequency. Manufactured Bandpass Filter is suitable for Radio Astronomy Equipments. Because the measured results agree well with the simulation results.

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A Study of Developing Band Pass Filter for Radio Astronomy Equipments (전파천문 기기용 BPF의 개발에 관한 연구)

  • Lee Je-Hun;Kim Dong-Il;Che Seung-Hun;Song Young-Man
    • Journal of Navigation and Port Research
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    • v.30 no.5
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    • pp.363-367
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    • 2006
  • The frequency band $10.5GHz\sim10.7GHz$ provides some of the best angular resolutions using many large and accurate radio telescopes. Developing high performance Bandpass Filter is needed for these equipments to receive low power signals from the space. In this paper, suggests Bandpass Filter for Radio Astronomy equipments. Designed by Microstrip Line for good pass characteristic and suppressing not necessary signals cause of using high frequency. Center frequency is 10.6 GHz and band width is 5% of Center frequency. Manufactured Bandpass Filter is suitable for Radio Astronomy Equipments. Bemuse it matches up to the result by simulate.

Design and Fabrication of Wideband High Pass Filter Using Left-Handed Transmission Line (LH 전송선을 이용한 광대역 고역통과 필터 설계 및 제작)

  • Yang, Doo-Yeong;Seo, Soo-Duk;Cho, Hak-Rae
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.18 no.2
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    • pp.260-267
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    • 2014
  • In this paper, the unit cell of LH structure using microstrip transmission line and chip capacitor is devised, and the reactive components of equivalent circuit are extracted from the proposed unit cell. And then, we have analyzed for the unit cell parameters and applied the characteristics to the wideband high pass filter design. This filter cascading several unit cells with high pass property has been implemented on microstrip transmission line, and the performance has been the band rejection characteristics of 62.9 dB in the stop band to 0~2.18 GHz and less than the insertion loss of 1.17 dB in the pass band from 3.0G Hz to 12.75 GHz.

Studies on the Microstrip Bandpass Filter Using Stepped Impedance Resonator and the Wideband Microstrip Bandpass Filter (스텝 임피던스 공진기를 이용한 마이크로스트립 대역통과 필터와 광대역 마이크로스트립 대역통과 필터에 관한 연구)

  • 박봉근;박동철
    • The Proceeding of the Korean Institute of Electromagnetic Engineering and Science
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    • v.2 no.4
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    • pp.10-16
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    • 1991
  • A microstrip bandpass filter using stepped impedance resonators and tapped input / output is realized with Teflon substrate, whose center frequency is 3.5 GHz and fractional bandwidth is 20%. In order to realize a wider bandwidth of 30%, the Crystal's design method and the input / output tapping scheme are used. Another microstrip filter designed as mentioned above is realized with Epsilam-10 substrate. This case shows good agreement between the theoretical responses and the measured ones.

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Implementation of Ultra-Wideband Microstrip Bandpass Filter for 10 Gb/s Wireless Transmission THz Transmitter and Receiver (10 Gb/s 무선 전송 THz 송수신기를 위한 초광대역 마이크로스트립 대역통과필터의 구현)

  • Lee, Won-Hui;Chung, Tae-Jin
    • The Journal of The Institute of Internet, Broadcasting and Communication
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    • v.11 no.4
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    • pp.1-8
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    • 2011
  • In this paper, a microstrip bandpass filter(BPF) with 3 dB bandwidth of more than 50 % at center frequency of 30 GHz was implemented. The implemented BPF is to be used as ASK(Amplitude Shift Keying) transmission and reception filters in IF band for THz transmitter and receiver capable of 10 Gb/s wireless data transmission. The microstrip BPF with ultra-wideband characteristics was implemented using a stepped-impedance lowpass filter(LPF) and a composite quarter-wave short stubs where the LPF is functioning as attenuating the upper stopband and quarter-wave short stubs is functioning as attenuating the lower stopband. The measured results are as follows; the insertion loss is 0.65 dB at 30 GHz, the stopband characteristics are -10 dB and -16 dB at 10 GHz and 50 GHz, respectively, and the passband flatness is ${\pm}0.5$ dB at 20~40 GHz.

Miniaturized Dual-Mode Microstrip Ring Resonator Using Open Stub for Bandpass Filter Applications (개방 스터브를 이용한 이중 모드 마이크로스트립 링 공진기의 소형화 및 대역 통과 필터 설계)

  • Choi, Sung-Soo;Park, Dong-Chul
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.18 no.6
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    • pp.674-679
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    • 2007
  • In this paper, the size of the dual-mode microstrip ring resonator is reduced by adding four open stubs, and bandpass filters having 100 MHz bandwidth are designed at the center frequency of 2 GHz. The size of the ring resonator can be controlled by varying the capacitance of the stubs, and the bandpass filter can be designed in two cases, which are two combinations of the stubs. Two bandpass filters are designed and fabricated by using the two-stage bandpass filter circuit model of the proposed structure, and the measured results show good agreement with the simulated results.