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J. Martin SahayarajPublished Date :
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ABSTRACT:
A Novel Design of Microstrip Antenna paper discusses the design and testing of a microstrip patch antenna for WLAN use at 2.4 GHz. Two feeding techniques—microstrip line feed and coaxial probe feed—were applied. We chose these methods because they are easy to fabricate and provide stable results. We used ADS2009 to simulate the antennas. The microstrip line-fed antenna showed a return loss of –12.5 dB, a beamwidth of 110°, and a gain of 6 dB. In contrast, the coaxial-fed antenna showed better performance with a return loss of –29 dB, a beamwidth of 150°, and a gain of 4 dB. Both antennas were built using an FR4 substrate with a dielectric constant of 4.6 and thickness of 1.6 mm. The coaxial-fed antenna resonated at exactly 2.4 GHz. The microstrip-fed antenna resonated at 2.404 GHz.
INTRODUCTION:
Wireless Local Area Networks (WLANs) play a crucial role in modern communication systems. As demand for high-speed wireless connectivity grows, engineers continue to improve antenna performance. The Microstrip Patch Antenna for WLAN stands out due to its compact size, ease of fabrication, and ability to integrate with printed circuit boards.In WLAN applications, one major challenge is multipath interference. When wireless signals reflect off surfaces and arrive at the antenna with different phases, they cause signal distortion. To reduce this effect, we need antennas that offer stable performance and directional radiation patterns.In this study, we designed and tested two microstrip patch antennas for the 2.4 GHz WLAN band. We used microstrip line feed and coaxial probe feed techniques, both chosen for their simplicity and effectiveness. Simulations using ADS2009 helped us evaluate key performance parameters, including return loss, beamwidth, and gain.We fabricated the antennas on FR4 substrate with a dielectric constant of 4.6 and thickness of 1.6 mm. The coaxial-fed antenna resonated at 2.4 GHz, while the microstrip-fed version resonated at 2.404 GHz. Both designs delivered reliable results, with the coaxial feed offering slightly better performance.
