Clockwise and counterclockwise circularly polarized wave common receiving apparatus for low noise converter

An apparatus for commonly receiving clockwise and counterclockwise circularly polarized waves for a low noise converter, comprising:

• first and second Hemt switching sections for receiving clockwise and counterclockwise circularly polarized wave signals of input probes installed adjacently to a rectangular microstrip patch through first and second feed lines, to selectively supply said signals to a low noise amplifier in accordance with the magnitude of the voltage of a low noise block converter;
• and a mixer for mixing output signals of said low noise amplifier with oscillation signals of a local oscillator to generate IF signals,
• wherein four input probes are installed adjacently to the edges of said rectangular microstrip patch;
• pairs of said four input probes adjacently positioned on said rectangular microstrip patch are commonly connected to said first and second feed lines;
• and
• the lengths of one of the probes of said common probes connected to said first and second feed lines shows a difference of .lambda..sub.g /4 relative to the other input probe of said common probes which is connected to either of said first or second feed lines.