Compact low-cost 4 elements microstrip antenna array for WLAN

A new 4 element antenna array topology of microstrip E shaped patches for use in WLAN applications is introduced. The operating frequency range is from 3.4 to 3.8 GHz. The array is mounted on a low-cost FR4 substrate and is fed by a standard 50 Ohm coaxial feed. A special combined series I corporate feeding network is incorporated directly in the array. The design chosen makes the array very compact and low cost. The size of the ground plane is 250 by 55 mm only. In the operating frequency range the gain of the array is more than 13 dB and the main beam direction is normal to the ground plane. The array is designed using a fnll wave solver based on the moment method.