Abstract
In this paper, an inverted suspended circular patch antenna with circular polarization is proposed for wireless local area network (WLAN) operating at 2.4 GHz frequency. The antenna was designed based on inverted suspended circular patch with an air gap between substrate and ground plane layer at distance of 10 mm. L-probe technique is used in this antenna design in order to feed the signal from SMA probe to the feedline of the circular patch structure. The design and simulation process are done by using Computer Simulation Technology (CST) software. Antenna performances in term of return loss, resonant frequency, bandwidth, gain, directivity, axial ratio, total efficiency and radiation pattern at 2.4 GHz frequency are discussed. The comparison result of simulation and measurement show that the proposed circular polarized antenna obtained bandwidth more than 100 MHz with gain and return loss achieved more than 5 dB and -13 dB at 2.4 GHz.
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