Bandwidth Improvement of Rectangular Patch Antenna Using Multiple Slots

2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall) Pub Date : 2019-12-01 DOI:10.1109/PIERS-Fall48861.2019.9021647

D. Madhavi, SUDHAKAR ALAPATI

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Abstract

A rectangular patch antenna with multiple slots is proposed in this paper to improve the bandwidth characteristics. The rectangular patch antenna consists of C-shaped patch lying along the feed line on both sides of it and the inner inverted U-slot along with the primary U-slot. Proposed antenna exhibits multi-resonant characteristics with the inclusion of several structures which are termed as multi-resonant structures. The notch band of 5.2-6 GHz (impedance bandwidth of 0.8 GHz) is observed by introducing U-slot and the corresponding gain is 4.587 dB at 7 GHz. The notch band antenna eliminates the interference caused by WLAN systems. The U-slot design is further extended by introducing inverted U-slot and C-slots. Hence, the segmented triple operating band has a -10 dB impedance bandwidth of 1 GHz (4-5 GHz), 10MHz (5.725-5.825 GHz) and 1.7GHz (7.8-9.5GHz). The maximum gain for the tri-band antenna is 6.024 dB at 8.5 GHz. The tri-band antenna gets return loss above -10 dB for WLAN and WiMAX frequency bands so as to avoid interference.

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多槽矩形贴片天线的带宽改进

为了提高天线的带宽特性，本文提出了一种多槽矩形贴片天线。矩形贴片天线由其两侧沿馈线的c型贴片和沿主u型槽的内倒u型槽组成。所提出的天线具有多谐振特性，其中包含几种称为多谐振结构的结构。通过引入u型槽，可以观察到5.2 ~ 6 GHz的陷波带(阻抗带宽为0.8 GHz)，在7 GHz时对应的增益为4.587 dB。陷波带天线消除了无线局域网系统造成的干扰。u型槽的设计进一步扩展，引入倒u型槽和c型槽。因此，分段三重工作频带具有1 GHz (4-5 GHz)， 10MHz (5.725-5.825 GHz)和1.7GHz (7.8-9.5GHz)的-10 dB阻抗带宽。三波段天线在8.5 GHz时的最大增益为6.024 dB。三波段天线在WLAN和WiMAX频段回波损耗在- 10db以上，以避免干扰。

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2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)

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