摘要
The Twin-Loop Antenna(TLA)has been widely used because of itsbroadband property and simply feeding,and some modified structures have been devel-oped from its prototype by Chinese engineers.But the exact design theory for TLA accord-ing to the impedance calculation has not yet been published.In this paper,the impedanceof loop in a TLA is analysed and computed by using the method of moments,and the de-sign formulae and a two-step optimization program for extending the bandwidth of inputimpedance of TLA are detailed.An example of optimized design shows that the bandwidthcan be increased up to 36.4% for VSWR≤1.10,which is wider than the bandwidth of ra-diation pattern.
The Twin-Loop Antenna(TLA)has been widely used because of its broadband property and simply feeding,and some modified structures have been devel- oped from its prototype by Chinese engineers.But the exact design theory for TLA accord- ing to the impedance calculation has not yet been published.In this paper,the impedance of loop in a TLA is analysed and computed by using the method of moments,and the de- sign formulae and a two-step optimization program for extending the bandwidth of input impedance of TLA are detailed.An example of optimized design shows that the bandwidth can be increased up to 36.4% for VSWR≤1.10,which is wider than the bandwidth of ra- diation pattern.
