Abstract
In this study, a triple-band suspended microstrip antenna with symmetrical U-slots is proposed for modern wireless communication systems. The antenna is specifically designed to acquire application in WLAN and WiMAX communication. Symmetrical U-slots in the radiator patch increase the number of resonances and improve the gain response. An appropriate air height was maintained between the ground plane and the radiator patch layer for improving bandwidth operation. The impedance characteristics of the antenna are enhanced using probe feeding techniques. The proposed compact antenna is designed on a single dielectric substrate of (30×25×1.56) mm3 . Parametric analysis of the proposed structure has been realized using IE3D software. This prototype exhibits maximum impedance bandwidth of 750 MHz and gain response of 7.28 dBi. The performance of the structure at three resonating bands i.e., at 3.3 GHz, 3.78 GHz and 5.3 GHz facilitate it to be applicable for WLAN/WiMAX systems.
Highlights
Microstrip antenna offers extensive applications in wireless communication systems due to its low profile, light weight and ease of integration with the RF/Microwave systems [1]
Single-feed microstrip antenna using multi-element radiator patch with a common input point was invented by C. kaloi [4] in 1981
It has been observed that adding all the slots onto the radiator patch leads to achieve a good return loss (│S11│)
Summary
Microstrip antenna offers extensive applications in wireless communication systems due to its low profile, light weight and ease of integration with the RF/Microwave systems [1]. In some cases it is desirable to incorporate a single antenna which can support two or more applications simultaneously. A single-element microstrip antenna with shorting pins was investigated for dual-frequency operation [5]. In [6], the authors used CPW feeding technique to enhance the impedance bandwidth of patch antenna. Several research works have been carried out using U-slots to obtain wideband characteristics [11,12,13] These U-slots create discontinuities in the current flow path, creating multiple paths for current flow of the patch surface. This enables the microstrip antenna to show multiband behavior
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