Abstract-Energy harvesting process can be done in many ways. One of them is by using rectenna. Rectenna is a combination of rectifier and antenna that can convert electromagnetic power into DC output voltage. The use of rectenna will disturb radio device because rectenna will absorb electromagnetic waves around the radio so a switch to adjust the time rectenna will work is necessary. As there is already an exclusive automatic switching method for rectenna and its neighboring device, which is Switch Operation Mode Rectenna, this research will discuss about the design of Switch Operation Mode Rectenna on radio by using 5V relay circuit, which functions as a regulator of radio and rectenna. This research also discusses how the effect of rectenna on the power received by FM 88-108 MHz radio.