Matching network antenna - Ham Radio End Fed Antenna with a 1:64 Matching Network

Additional elements in the antenna structure, which need not be directly connected to the receiver or transmitter, increase its directionality.

Although a square patch could be fed on two adjacent sides with the proper phases to obtain circularly polarized radiation, simpler circularly polarized patches have been developed.

The greater Q for a given impedance transformation ratio, the greater network phase shift becomes.

Resonant antennas usually use a linear conductor or element , or pair of such elements, each of which is about a quarter of the wavelength in length an odd multiple of quarter wavelengths will also be resonant.