MICROSTRIP PATCH ANTENNA USING PIEZOELECTRIC SUBSTRATES

摘要

A method of shifting the resonant frequency by applying an electric field to a microstrip patch antenna using a quartz substrate is disclosed. It is suggested that the resonant frequency of the microstrip patch antenna can be controlled by an electric field using piezoelectric material as its substrate. The inventor fabricated microstrip patch antennas using X-cut, Y-cut and Z-cut quartz substrates. When an electric field of 400V/mm was applied, the frequency shifts of X-cut quartz microstrip patch antennas, whose resonant frequency were 6GHz, 8GHz and 10GHz, were 33.11MHz, 42.13MHz and 55.27MHz, respectively. These frequency shifts of X-cut quartz antennas were almost twice the frequency shifts of Y-cut and Z-cut quartz antennas.