【摘要】 本文设计了一种四频段共体圆极化微带天线．在800～2500MHz内各频段辐射元贴片优化安置在一个200×180mm2的基片上，使各自的波束特性、极化特性和阻抗特性相互之间影响很小。实测结果，VSWR≤1．3，轴比（r）小于3dB，各辐射元之间的频响电平隔离度一般大于25dB，增益约5dB。更多还原

【Abstract】 A circular polarized rectangular microstrip antenna of co-body with four bands is designed. Ranging from 800MHz to 2500MHz, each radiation patch is optimized on a 200×180mm2 substrate, so that the affection of half-power beamwidths, polarizations and input impedances among four bands is minimized. Test results are: VSWR≤1. 3, axis-ratio less than 3dB. The isolation between patches in each band is more than 25dB (in general). The gain is equal to approximately.更多还原