정보통신설비학회논문지 (Journal of The Institute of Information and Telecommunication Facilities Engineering)

한국정보통신설비학회 (Korea Institute of Information and Telecommunication Facilities Engineering)
권호 표지

A Broadband Microstrip Array Antenna for 3G Smart Antenna System Testbed

  • Rashid, Zainol Abidin Abdul (Faculty of Engineering, Department of Electrical, Electronics and System Engineering University Kebangsaan Malaysia) ;
  • Islam, Mohammad Tariqul (Faculty of Engineering, Department of Electrical, Electronics and System Engineering University Kebangsaan Malaysia) ;
  • Jiunn, Ng Kok (Faculty of Engineering, Department of Electrical, Electronics and System Engineering University Kebangsaan Malaysia)
  • 발행 : 2007.03.30
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초록

A compact and broadband $4{\times}1$ array antenna was developed for 3G smart antenna system testbed. The $4{\times}1$ uniform linear array antenna was designed to operate at 1.885 to 2.2GHz with a total bandwidth of 315MHz. The array elements were based on the novel broadband L-probe fed inverted hybrid E-H (LIEH) shaped microstrip patch, which offers 22% size reduction to the conventional rectangular microstrip patch antenna. For steering the antenna beam, a commercial variable attenuator (KAT1D04SA002), a variable phase shifter (KPH350SC00) with four units each, and the corporate 4-ways Wilkinson power divider which was fabricated in-house were integrated to form the beamforming feed network. The developed antenna has an impedance bandwidth of 17.32% ($VSWR{\leq}1.5$), 21.78% ($VSWR{\leq}2$) with respect to center frequency 2.02GHz and with an achievable gain of 11.9dBi. The design antenna offer a broadband, compact and mobile solution for a 3G smart antenna testbed to fully characterized the IMT-2000 radio specifications and system performances.

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