Widely tunable multiband reconfigurable patch antenna for wireless applications

A design of a low profile reconfigurable microstrip patch antenna is presented. The antenna consists of four sup-patches connected to one feed line, each sub-patch generates a single band. By placing a variable capacitor at the input of the sub-patches, the impedance matching frequency of the antenna can be tuned over a wide range starting from 0.92 GHz to 2.98 GHz with total tunability rang of 2060 MHz. The proposed antenna designed to operate in the Global System for Mobile communication (GSM900, 880–960 MHz)/ Digital Communication System (DCS1800, 1710–1880 MHz)/ Universal Mobile Telecommunication System (UMTS, 1920–2170 MHz)/ Wireless Local Area Network (WLAN, 2400–2483.5 MHz)/ and Worldwide Interoperability for Microwave Access (WiMAX, 2495–2700 MHz). The total size of the proposed antenna is 50 × 50 mm² which is suitable for small wireless devices.