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Wideband Stacked Microstrip Antenna with Rectangular and Triangular Parasitic Patches for 860MHz Band

직사각형 및 삼각형 기생패치를 이용한 860MHz 대역 광대역 적층 마이크로스트립 안테나

  • Received : 2016.04.04
  • Accepted : 2016.04.12
  • Published : 2016.05.31

Abstract

A wideband stacked patch antenna with parasitic elements, rectangular and triangle shaped patches, is proposed. Two different shaped parasitic elements are placed in the above of main rectangular microstrip patch antenna in order to achieve wide bandwidth for 860 MHz band. Coupling between the main patch and parasitic patches is realized by thick air gap. The gap and locations of parasitic patches are found to be the main factor of the wideband impedance matching. The proposed antenna is designed and fabricated on a ground plane with small size of $119mm{\times}109mm$ for application of compact transceivers. The fabricated antenna on an FR4 substrate shows that the minimum measured return loss is below -11.68dB at 824 MHz and an impedance band of 818~919 MHz(11.7%) at 10dB return loss level. The measured radiation patterns are similar to those of a conventional patch antenna with maximum gain of 2.11 dBi at 824 MHz.

Keywords

Wideband;Parasitic patch;Stacked patch;Microstrip patch antenna

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