A wide band microstrip antenna for portable cordless telephones

The microstrip antenna is one of the most preferable for small portable digital cordless telephones, especially when a built-in antenna is required. Most portable cordless telephones require the antenna to have an impedance bandwidth of at least, 3 or 4 % at 900 MHz. A very compact wide band microstrip antenna is presented where both the driven and the parasitic elements are partially shorted double C-patches on a very small ground plane.