Stacked Square-Ring Microstrip Slot Antenna for Broadband Characteristics

광대역 특성을 위한 적층형 정사각형 링 마이크로스트립 슬롯 안테나

A method for miniaturization of microstrip patch antenna without degrading its radiation characteristics is investigated. The ring geometry introduces additional parameters to the antenna that can be used to control its resonance frequency and bandwidth. For a single square ring increasing the size of patch decreases the resonance frequency and bandwidth. To match the antenna to a transmission line and also enhance its bandwidth. the square ring patch is stacked by a square ring patch. The computed results are compared with experiment and good agreement is obtained.