Abstract
A multilayer antenna structure proposed to enhance the performance of patch antenna used for WLAN applications. The antenna composed of three layers of Rogers RO3010 located above a feeder patch antenna. Adding superstrate (dielectric) layers above feeding patch improved the overall performance of antenna. An agreement between simulated and measured results was achieved in terms of return loss, gain, and operating bandwidth. The proposed antenna had achieved gain of 11.30 dB, Front-to-Back (F/B) ratio of 18 dB, and gain variation around 0.6 dB over the Scientific, Industrial, and Medical ISM band (5.725 - 5.875) GHz. The simulated and measured return loss, resonant frequency, gain and bandwidth for the proposed design are presented. Computer Simulation Technology (CST Microwave studio) was used as a simulation environment for this design.
Highlights
Microstrip patch antenna shows many features such as being a low-cost antenna with low weight and operating within multiple resonant frequencies, while it is suffering disadvantages such as narrow operating bandwidth, low gain, high side lobe level (SLL), and low radiation efficiency[1]–[3]
The antenna had achieved a maximum gain of 14.4 dB at 5.8 GHz.[18] had presented an antenna composed of an feeding patch (FP) covered with FR4 superstrate layer and 4×4 partially reflecting surfaces (PRS) array
The FP was covered by FR4 superstrate and 55× PRS array located at the height of 0.5 λo from the ground plane
Summary
Microstrip patch antenna shows many features such as being a low-cost antenna with low weight and operating within multiple resonant frequencies, while it is suffering disadvantages such as narrow operating bandwidth, low gain, high side lobe level (SLL), and low radiation efficiency[1]–[3]. The antenna had achieved a maximum gain of 14.4 dB at 5.8 GHz.[18] had presented an antenna composed of an FP covered with FR4 superstrate layer and 4×4 PRS array. The antenna achieved gain less than 17 dB over the ISM band [19] had enhanced the gain of a patch antenna from 9.4 dB to 18.3 dB due to using a circular array of PRS printed on the bottom of FR4 superstrate with dimensions of 181×181 mm for the superstrate layer and the ground plane. The work in [20] had achieved a gain of 22.4 dB due to printing 3×3 and 9×9 arrays of PRS on FR4 layers which were located at half free space wavelength (λo) and 1.5λo, respectively, above FP. The antenna had achieved 12.7 dB maximum gain [19]
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