| 摘要 |
<p>Electronically rotatable polarization antenna feed apparatus includes a pair of probes oriented in an orthogonal relationship to each other (90 degrees apart) and the probes extend through the rear wall of a waveguide. The probes are connected through low noise amplifiers to variable resistors or variable gain amplifiers. The signal to noise ratio of the desirable polarization signal from the two probes is maximized and the undesirable polarization signal from the two probes is cancelled. If desired, polarization components from the two probes may be combined so that both the horizontal and the vertical polarization signals may be used simultaneously. The apparatus may be used with linearly polarized signals and with circularly polarized signals. <IMAGE></p> |
