• Title/Summary/Keyword: Switchable Frequency, Equilateral-Triangular, Microstrip, PIN Diode

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Switchable Frequency of an Equilateral Triangular Microstrip Antenna with PIN Diodes (PIN 다이오드를 이용한 정삼각형 마이크로스트립 안테나의 동작 주파수 변환)

  • 김보연;성영제;김영식
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.15 no.11
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    • pp.1090-1099
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    • 2004
  • In this paper a novel design of equilateral-triangular microstrip antenna using PIN diode fur switching the resonant frequency is presented and experimentally studied. The proposed antenna has changed the resonant frequency by length of spur-lines on the patch, and PIN diodes are utilized to switch the spur-line on and off. The shape of the spur-line is changed according to the on and off states of PIN diode and the equilateral triangular microstrip antenna has different resonant frequencies in accordance with them. The resonant frequency is 1.22 GHz with off states since the surface currents flow the periphery of T shape spur-lines, while the resonant frequency is 1.82 GHz with on states since the surface currents are little effect with the conventional equilateral triangular microstrip antenna. The radiation pattern of the proposed antenna has a good linear polarization with the cross polarization of -20 dB both with on and off states.