Broadband square microstrip patch antenna with suspended parasitic element

An experimental investigation is presented on the impedance bandwidth of an electromagnetically coupled, probe-fed square microstrip patch antenna with suspended parasitic. A bandwidth of 25.5 % is achieved around a center frequency of 5.441 GHz. Measurements on gain and patterns are also presented. The antenna presented is small in the overall size, i.e. 55 mm * 55 mm, and suitable for use in planar and conformal arrays. It could find application in the industrial, scientific and medical (TSM) frequency band as well as in the 3G wireless local area network.