新型曲折线全向型陶瓷天线及阵列的设计与仿真测试

Design and Simulation of New Meander-Line Omni Directional Ceramic Antenna and Array

基于移动通信终端设备对天线体积的要求,设计了一种新型的曲折线结构全向型陶瓷天线,其谐振频率为1.85GHz,S11=-15.5dB,最大尺寸为0.06λ0。对陶瓷天线二元阵列进行了仿真与测试,发现虽然在陶瓷中可以很好地控制单元天线的相位,但是在空气中由于干涉效应不明显,并不能很好地控制方向图。故设计各单元天线独立馈电的阵列时,单元间距应该达到可以与λ0相比拟的程度。

The size of the antenna must be compact enough for the mobile communication terminals. Thus a new omni directional ceramic antenna using meander lines is designed. Its resonant frequency is 1.85 GHz, 511=-15.5 dB, the largest dimension of the antenna is 0. 06λ0（λ0 is the free space wavelength）. Simulation and measurement of the ceramic antenna array indicate that the phases of the antennas can be controlled on the ceramic substrate b S S ut the radiation pattern can not be controlled in the air, as aresult of the inconspicuous interference effect. o in the design of antenna array, the elements are all fed independently, the distance between any two elements hould be in the same order of magnitude withλ0.