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과기엄장
Science Mosaic
2015年
8期
110-115
,共6页
微带天线%大带宽%短路面%泡沫介质层%HFSS%同轴馈电
微帶天線%大帶寬%短路麵%泡沫介質層%HFSS%同軸饋電
미대천선%대대관%단로면%포말개질층%HFSS%동축궤전
Microstrip Antenna%Wide Bandwidth%Shorting Wall%Foam Dielectric Layer%HFSS%Coaxial Feed
本文设计了一种改进的大带宽的微带天线. 该天线采用相对介电常数接近于空气的泡沫介质层;通过在介质基片上开长方体槽,减小了馈电探针的长度,从而减小了探针电感对输入阻抗的影响,并且在贴片与接地板之间引入短路面, 相当于在天线贴片与接地板之间形成了一个电壁, 能够降低天线的谐振频率,从而可以减小天线的尺寸、展宽天线带宽;短路面的使用也减小了天线的尺寸. HFSS仿真结果表明,当回波损耗S11<-10dB时,天线覆盖了1.51~4.66GHz的频率范围,相对带宽达到了102.1%,该天线结构简单,性能良好.
本文設計瞭一種改進的大帶寬的微帶天線. 該天線採用相對介電常數接近于空氣的泡沫介質層;通過在介質基片上開長方體槽,減小瞭饋電探針的長度,從而減小瞭探針電感對輸入阻抗的影響,併且在貼片與接地闆之間引入短路麵, 相噹于在天線貼片與接地闆之間形成瞭一箇電壁, 能夠降低天線的諧振頻率,從而可以減小天線的呎吋、展寬天線帶寬;短路麵的使用也減小瞭天線的呎吋. HFSS倣真結果錶明,噹迴波損耗S11<-10dB時,天線覆蓋瞭1.51~4.66GHz的頻率範圍,相對帶寬達到瞭102.1%,該天線結構簡單,性能良好.
본문설계료일충개진적대대관적미대천선. 해천선채용상대개전상수접근우공기적포말개질층;통과재개질기편상개장방체조,감소료궤전탐침적장도,종이감소료탐침전감대수입조항적영향,병차재첩편여접지판지간인입단로면, 상당우재천선첩편여접지판지간형성료일개전벽, 능구강저천선적해진빈솔,종이가이감소천선적척촌、전관천선대관;단로면적사용야감소료천선적척촌. HFSS방진결과표명,당회파손모S11<-10dB시,천선복개료1.51~4.66GHz적빈솔범위,상대대관체도료102.1%,해천선결구간단,성능량호.
This paper designs a modified wide bandwidth microstrip antenna. The antenna uses foam dielec-tric layer whose relative permittivity is close to the air. By opening a cuboid groove on the dielectric substrate, and reducing the length of the feeding probe, we can reduce the probe inductance's effect to the input impedance. And by introducing a short road between the patch and ground plate, which is equivalent to forming an electrical wall between the antenna patch and the ground plate, we can reduce the resonant frequency of the antenna, which can reduce the size and broaden the bandwidth of the antenna. HFSS simulation results show that when the return loss S11<-10dB, the antenna covers the frequency range from 1.51GHz to 4.66GHz, with relative bandwidth reaching 102.1%. The antenna has good performance and simple structure.
