Analysis of a Low-Profile Reconfigurable Wideband L-shaped Printed Antenna for 5G/ISM-Band Applications

A low-profile frequency reconfigurable L-shaped printed antenna operating in microwave frequency band is presented in this article. The proposed antenna is fabricated on FR4 material having δ of 0.02, relative permittivity of 4.4 and thickness of 1.6 mm. HSCH 3486 PIN diode is inserted in between the feed line and the L-shaped structure for switching. The proposed antenna is resonating at 3.5 GHz and 6.6 GHz and offered an impedance bandwidth of 0.9 GHz and 3.5 GHz. Voltage standing wave ratio of the antenna is less than 1.5 at both the resonating frequencies. Efficiency of the designed antenna is 87% and 3 dBi gain of the antenna is 4.61 dBi. The proposed antenna is simulated by utilizing finite element method tool Ansoft HFSS v13 and the simulated results are experimentally validated. Due to its compact size the proposed antenna can be used for 5G-sub-6GHz and ISM band, X-band satellite communication applications.