A micro-strip antenna.

摘要

A linear polarization strip antenna which comprises a dielectric substrate (60) whose backside is fitted with a conductive ground film, a power supply strip line (64) which is formed of a conductive fiim and on the surface of the dielectric substrate (60), and a linear polarization radiation element (66). The strip line (64) and radiation element (66) are electromagnetically coupled together. A diode (70) is connected between a top end of the strip line (64) and a ground terminal. The top end of the strip line (64) is selectively set at an open or grounded state according to the conductive state of the diode (70) to vary the mode of electromagnetic coupling between the strip line (64) and radiation element (66), thereby changing the direction in which the radiated electromagnetic wave is polarized.