一种小型CDMA扩频宽带天线计算机辅助设计

A Computer Aided Design of a Mini-type CDMA Spread Spectrum Broad Band Antenna

为了研制一种直接序列与跳时混合扩频的小型宽带通信天线,采用了近代天线理论的矩量法分析和计算机进行辅助设计,获得了带宽在35 MHz^116 MHz频率范围,驻波系数ρ<2.5,天线高度为1.4 m的小型码分多址宽带扩频通信天线。应用Fortran语言编制的计算机程序,能迅速地设计出符合要求的小型扩频宽带通信天线。该天线体积很小,能较好地保证某混合扩频通信电台的抗干扰试验。

This paper introduces a design method of a mini-type Direct Sequence/Time Hopping （DS/TH） hybrid spread spectrum broad band antenna based on matrix-measure method of modern antenna theory and computer aided design. A mini-type Code Division Multiple Access（CDMA） spread spectrum broad band antenna is obtained with bandwidth of 35 MHz to 116 MHz, standing wave coefficient p〈2.5, antenna height of 1.4 meters. The volume of this antenna is much smaller than most other analogous broad band antennae. A hybrid spread spectrum communication radio set with this antenna has finished anti-jamming testing. In the antenna design process, the antenna size can be amended until the requirements are met. The computer programs in Fortran language can design out this mini-type spread spectrum broad band antenna quickly.