Laser Controlled Loop Antenna

A new type of antenna system has been proposed - a configurable loop antenna with laser control. It is shown that the addition of semiconductor elements of the photoresistor type to the elements of the outer contour of the loop antenna makes it possible to significantly expand the functionality of the loop antenna and control the antenna characteristics using an external laser source. The paper presents the results of studies of characteristics of the transmission coefficient S11 of loop antennas composed of metal and semiconductor elements. It has been found that when a semiconductor element (photoresistor) is exposed to laser radiation, it is possible to effectively control the wave impedance of the antenna. In the range 0.3-800 MHz, the dependences of the voltage standing wave ratio (VSWR) and impedance on the radiation power of the laser module are obtained.