交換螺旋天線上的接收器極性會改變從右手到左手的極化嗎?


1

我正在評估螺旋天線,並想嘗試一種比其設計的反向圓極化。我確實知道它是平衡的並且沒有其他組件可以防止極性反轉,因此,只要我注意連接器周圍的接地問題,就不會損壞接收器或天線。

我是否正確地認為,簡單地顛倒與接收器的連接也會顛倒天線的圓極化?

3

What do you mean by reversing connection? If you just swap the ground and center wire of the feeding coaxial you create 180 phase shift, not change the polarization.

The polarization of a helix antenna is determined by the rotation direction of the helix (right handed helix radiates right handed circular polarization). If you want to change the helix designed for RHCP to radiate LHCP, you must re-wire the entire helix. http://en.wikipedia.org/wiki/Helical_antenna


3

No. Reversing the conductors of the feed line produces a 180° phase shift (which is generally completely irrelevant) and has no effect on polarization.

One way you could reverse the polarization without modifying the antenna would be to reflect the signal once.