| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized microstrip patch antenna of low loss. SOLUTION: A transmission system circuit of an antenna system consists of only a power distributor 12, transmission high frequency amplifiers 13a, 13b, isolators 14a, 14b and a patch antenna element 15. Since a signal with large power amplified by the two transmission high frequency amplifiers 13a, 13b is fed to the patch antenna element 15 not via a power combiner, the antenna system has a low loss. Furthermore, since the power distributor 12, the transmission high frequency amplifiers 13a, 13b, the isolators 14a, 14b and the patch antenna element 15 are integrated on a dielectric board 10, the antenna system can be miniaturized.
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