• Title, Summary, Keyword: The Diplexer Matching Network

Search Result 3, Processing Time 0.047 seconds

Designing a Wideband Antenna Using Diplexer Matching Network for Tactical Vehicles (다이플렉서 정합구조를 이용한 전술차량형 광대역 안테나 설계)

  • Cho, Ji-Haeng;Dong, Moon-Ho
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.29 no.9
    • /
    • pp.661-667
    • /
    • 2018
  • Tactical communication radio systems that employ software defined radios(SDRs) have been developed for achieving high-speed data transmissions and voice communications. Such systems possess multiband and multichannel features, and can potentially replace several existing radio systems. This paper proposes a design for wideband antennas by incorporating a diplexer matching network for tactical vehicles. The proposed antenna design includes two radiators(upper and lower) and a diplexer matching network connected to the end of the feed line such that the LC matching networks are interleaved in the lower radiator and spring mount. By employing the diplexer matching network, the designed antenna can perform wideband impedance matching for the fifty ohm feed line. The designed LC networks aid in varying the effective electrical length of the antenna according to the operation frequency. The primary objective behind adjusting the electrical length is to vary the current distribution above and below the LC networks. The proposed antenna was fabricated and tested in an open site. The obtained evaluation results show that the designed antenna can achieve a relative bandwidth of 190% with a VSWR value of 3.5:1, and can attain good antenna gains over VHF and UHF bands.

Design and implementation of Broadband Antenna/Diplexer for dual-band handsets (이중대역 단말기용 광대역 안테나 및 다이플렉서 설계 및 구현)

  • 김재호;김영태;박준석;천창율;임재봉;신재완;강현규;정중성;황희용
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
    • /
    • /
    • pp.149-152
    • /
    • 2002
  • In this paper, We have designed an internal chip type-ceramic antenna and diplexer for dual-band handset applications. for increasing bandwidth, antennas used a meander line structure with L, C matching network. The designed diplexer is based on the multi-layered structure for the purpose of the LTCC applications. We have given a notch using resonator for elevated attenuation characteristics.

  • PDF

Research Dual Band Power Amplifier using PBG Structure (PBG 구조를 이용한 Dual Band 전력증폭기 연구)

  • 전익태;서철헌
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.15 no.8
    • /
    • pp.788-793
    • /
    • 2004
  • This paper proposes new configuration for the dual power amplifier that operates at 5.8 GHz for the wireless LAN and 1.8 GHz for the PCS. It dose not select the input signal but amplify the dual band signals simultaneously. Broadband diplexer is used at the input to separate the dual band signals. Output power of each amplifier is 1 W. The PBG is employed to improve the performance of power amplifier. Generally, the PBG is employed at the end of output matching network. But in this paper, the PBG is employed in the load pull output matching circuit of amplifer to maximize the output power.