Multiband, Circular Microstrip Patch Antenna for Wireless Applications

This research article describes the design of a circular-shaped microstrip patch antenna in detail. The circular shaped microstrip antenna is designed to resonate at 10 frequency bands from 3.2 to 19.1 GHz and hence it can be used for advance wireless communication applications. The designed antenna can be used in small handheld devices supporting communication protocols like Bluetooth 2.0, Bluetooth Low Energy, Wireless Fidelity (Wi-Fi), Zigbee IEEE 802.15. 4, 2G/3G/4G/LTE-A, and 5G. The designed antenna can resonate at 10 different frequencies from 3.2 to 19.1 GHz (3.2, 5.3, 7.4, 9.6, 11.7, 13.2, 13.2, 13.7, 15.3, and 19.1 GHz). The bands of frequencies are specifically designed frequencies on which the designed circular-shaped microstrip patch antenna would work and can be modified and redesigned to work for a different dedicated application/protocol operating between the ranges of 3.2–19.10 GHz. At 10 different frequencies specified here, the observed values of S-parameter are lower than − 10 dB. The voltage standing wave ratios of the antenna at above frequencies are in between 1 and 2. As the antenna shows narrow band communication capabilities at these frequencies, the antenna can be used for a definite purpose with a definite frequency with no interference with other wireless communication system.