VHF / UHF-地面圓極化天線


1

在過去的20年中,我主要從事高頻工作,最近剛在我的棚屋中安裝了2m / 70cm的移動台,用於基站工作。我不喜歡在HF頻段不合作的情況下工作FM單工和中繼器,並希望為這些頻段建立波束。

圓偏振光束對地面通信有什麼負面或正面影響?一個沒有根據的假設是,它對於中繼器工作(垂直極化)和SSB / CW(水平極化)均適用。

(我也很想有一個天線,如果妥協很小的話,將來可以用於衛星工作)

1

Circular polarization can be seen as half horizontal and half vertical polarization. Therefore, between a circularly polarized antenna and a linearly polarized antenna, half the signal will be lost (-3 dB gain).

The only disadvantages of a circularly polarized antenna are that loss and the additional complexity (phasing, mechanical structure, weight). If you're OK with that, go right ahead!