一种改进的宽带微带天线设计

设计了一款工作于470~860 MHz的改进微带天线,并对其进行了性能仿真和参数优化。所设计的天线使用高介电常数的介质基片,并在其上下表面使用对称放置的半椭圆形金属铜片,利用椭圆曲线的渐变特性来达到展宽带宽的目的。在保证足够带宽和频率要求的前提下,这种设计缩小了天线的尺寸,可方便用作车载电视和手持电视等设备的接收天线。

Design of an Improved Wideband Microstrip Antenna

In this paper,an improved wideband microstrip antenna is analyzed and designed,it works in the frequency range between 470 MHz and 860 MHz.It utilizes high permittivity dielectric substrate,with symmetrical semiellipse metal patches placed at its upper and lower surfaces.The bandwidth is broadened due to gradient characteristic of the elliptic curve.On the premise of enough bandwidth and frequency,the proposed design reduces the size of antenna a lot,which can be used for vehicle mounted and hand-held TV receivers.