A dual‐frequency inverted‐F antenna for UAVs transceiver application

Abstract

AbstractA dual‐frequency inverted‐F antenna operating in the ultrahigh frequency band is presented. The proposed antenna includes an inverted F‐shaped radiator and a dual‐frequency loading circuit. The dual‐frequency loading circuit is located between the short pin and the ground. The dual‐frequency loading circuit presents a short‐circuit state at the low‐frequency band and an open‐circuit state at the high‐frequency band. By introducing the dual‐frequency loading circuit, the proposed antenna possesses dual‐frequency performance compared with the traditional inverted‐F antenna. The resonant frequencies of the proposed antenna can be controlled by adjusting the component values of the dual‐frequency loading circuit. A prototype was fabricated and measured to validate the method. The height of the fabricated antenna is 40 mm at 713 MHz. The bandwidths of the fabricated prototype are 713–779 MHz and 858–920 MHz. The proposed antenna possesses vertical polarization, which shows that the proposed antenna has broad application prospects in unmanned aerial vehicles communication systems.