Performance Analysis of an Aperture Coupled Microstrip Stacked Patch Antenna For WLAN Applications
Abstarct- In this paper microstrip stacked patch antenna with 10mm air gap using aperture coupling technique at frequency of 5.8 GHz has been discussed. Microstrip antennas suffer from a biggest drawback of narrow bandwidth and this can be improved by a technique called aperture coupling and further by stacking of antennas without increase in surface area of antenna. Without stacking bandwidth comes out to be 310 MHz and with stacking the bandwidth increases to 440 MHz. The airgap of 10mm is used between the two patches. The gain and directivity has also been increased. The bandwidth has been increased upto 42 % in this design. The application of this design is in WLAN and WIMAX. The simulation is done using CST 2010 software.
Keywords: Stacking, WLAN, Air gap, VSWR, Gain, Directivity
Introduction
In present days antenna design has become more challenging because of the demand for wireless systems and small size antenna has been increased. For this microstrip antennas are designed. The microstrip patch antennas are basically low profile antennas and have various advantages like small size, low cost, light weight, ease of fabrication and ease of installation and integration with feed networks. But it has one biggest drawback of narrow bandwidth because the range of frequency bands at which antenna can work properly has been limited. In recent years much work has been done to increase both the bandwidth and radiation efficiency of antenna with the help of aperture coupling technique and further by stacking of antennas [1]. In aperture coupling technique, two substrates are used. On the top of first substrate the patch is e...
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...vector network analyser.
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