A compact broadband microstrip patch antenna for WiMAX/LAN/Wi-Fi/WLAN applications

727-732A broadband crucifix shape patch type microstrip antenna with rectangular modified ground plane has been presented. Two slots have been loaded on the rectangular ground plane and high gain wide-band response has been obtained. The -10dB bandwidth of the proposed antenna is around 6.3 GHz with a percentage bandwidth of 115%. Maximum positive gain of 4.32 dBi (measured) and multi operating frequencies at 2.46 GHz, 5.46 GHz and 7.52 GHz, respectively have been achieved. Different simulated antenna responses have been investigated with variation of slots dimensions and its position on the ground plane. The measured frequency band is 2.1 GHz to 8.88 GHz with a percentage of bandwidth 123.5%. The proposed antenna has been simulated using Ansoft designer software. Simulated results have been confirmed by measured results. The antenna is suitable for modern broadband wireless communication systems such as Bluetooth (2.4 – 2.485 GHz), WiMAX (3.4 – 3.6 and 3.7 – 4.2 GHz), LAN (5.47 – 5.725 GHz), WiFi 802.11y (3.6 – 3.7 GHz) and WLAN 802.11b/g/a (5.31 – 6.32 GHz)