• Title, Summary, Keyword: Filtering power divider

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Novel Filtering Power Divider with External Isolation Resistors

  • Lu, Yun-Long;Wang, Shun;Dai, Gao-Le;Li, Kai
    • ETRI Journal
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    • v.37 no.1
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    • pp.61-65
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    • 2015
  • In this paper, a novel filtering power divider with external isolation resistors is presented. The proposed power divider can be considered as an integration of a bandpass filter and a Gysel power divider. Based on the circuit topology, a high-order filtering power divider can be easily realized. Odd- and even-mode models are employed to analyze the filtering and power splitting functions. For demonstration, a third-order filtering power divider operating at 1.5 GHz is designed and implemented. The measured results exhibit an isolation between the output ports that is better than 20 dB at around the center frequency.

New UWB 1:2 Power Divider with Flat In-Band Splitting and Bandpass Filtering Functions

  • Duong, Thai Hoa;Kim, Ihn-Seok
    • Journal of electromagnetic engineering and science
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    • v.10 no.1
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    • pp.28-34
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    • 2010
  • This paper introduces a new U.S. ultra-wideband(UWB: 3.1~10.6 GHz) 1:2 power divider based on a single section Wilkinson type configuration. The divider provides very flat in-band power splitting, high isolation, low insertion loss, sharp roll-off bandpass filtering, and DC blocking characteristics. The circuit consists of a $\lambda$/4 Y resonator, three capacitively coupled $\lambda$/2 short-circuited lines, and a resistor between the two output ports. The circuit structure was simulated with ADS and HFSS, and realized with low-temperature co-fired ceramic(LTCC) green tape, which has a dielectric constant of 7.8. $|S_{11}|$ better than 10 dB, $|S_{21}|$ and $|S_{31}|$ less than 3.2 dB, with both $|S_{22}|$ and $|S_{32}|$ measured as better than 12 dB for the whole UWB band. Measurement results agree closely with HFSS simulation results. The power divider has a compact size of $4\times9\times0.6mm^3$.

Design of a Miniature Power Divider Based on the CRLH Zeroth Order Resonator with the Bandpass Filtering for the Military Satellite (군 위성통신 중계기용 대역통과 여파기 특성을 갖는 CRLH O-차 공진 기반 소형 전력분배기의 설계)

  • Eom, Da-Jeong;Kahng, Sung-Tek;Song, Choong-Ho;Woo, Chun-Sik;Park, Do-Hyun
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.37 no.8C
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    • pp.637-644
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    • 2012
  • In this paper, a new compact power divider is suggested. Instead of the quarter wavelength transmission line(TX-line)s for the branches of the conventional Wilkinson's power divider design method, we use our composite right- and left-handed(CRLH) TX-line zeroth order resonator(ZOR) bandpass filters of one twelfth wavelength and reduce the physical length of the power divider. Besides, the filters in the branches can secure the passband for power-division. To validate the proposed power divider, we take an L-band for millitary satellaite transponder as the test case and the performances of the circuit and full-wave simulation results with the CRLH properties of the structure are shown with the dispersion curve and E-field at the ZOR. The measurement is compared with the simulation results. Also, the size reduction effect by the proposed scheme is addressed