Abstract
This article presents a bandwidth enhancing technique using a modified ground plane with diagonal edges, rectangular slot, and T-shape cut for the design of compact antennas. The proposed low-cost, compact-size circular patch antenna on 3 cm 5.1 cm printed circuit board (FR-4) is designed and validated through simulations and experiments. Results show that the T-shaped ground plane with the presence of the diagonal cuts at the top corners and the rectangular slots can increase the bandwidth. Return losses of 19 and 26 dB for the first and second resonant frequencies, respectively, can be achieved when the depth of the diagonal cut is 5 mm, the dimension of each rectangular slot is mm, and the T-shaped size is mm, providing a 28.67% wider bandwidth than FCC standard.
Highlights
Ultra-wideband (UWB) technology has been regarded as one of the most promising wireless technologies that have a capability of revolutionizing high data rate transmission
To further improve the bandwidth of the antenna, we removed the top corners of the ground plane, resulting in symmetrical diagonal edges
The results show that an accumulation of ground plane modifications introduces an extra return loss dip, resulting in the optimal bandwidth
Summary
Ultra-wideband (UWB) technology has been regarded as one of the most promising wireless technologies that have a capability of revolutionizing high data rate transmission. Where C denotes the maximum transmit data rate, B stands for the channel bandwidth, and SNR is the signal-to-noise ratio. From this principle, the transmit data rate can be enhanced by increasing either the bandwidth occupation or the transmission power. Applications of corner cut technique have been previously employed to improve the impedance bandwidth for microstrip patch antennas [4,5,6]. The preliminary simulation results of our proposed antenna are compared with the measured ones. Following this introduction, the rest of the paper is organized as follows.
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