Abstract
A planar microstrip patch super-wideband antenna is presented for short distance wireless communication applications. The antenna is comprised of a simple patch and a ground plane and etched on two sides of a 1.6 mm-thick standard FR4 substrate material with a relative permittivity of 4.5 and loss tangent (0.02). The proposed antenna possesses a compact size of 29 × 20.5 mm2 with an electrical dimension of 0.25 λ × 0.18 λ. To enhance the operating bandwidth, the ground plane is modified by adding seven small rectangular slots on its upper side. Through numerical studies, it is found that insertion of the slots enhances the coupling between the patch and ground plane resulting in achievement of a super-wide operating band. From the measurements, it is observed that the fabricated prototype antenna has a bandwidth from 2.63 to more than 18 GHz, a symmetric omnidirectional radiation characteristic and the maximum peak gain of 5.85 dBi which makes it a suitable transceiver for short distance communication applications.
Highlights
The advent of the new information era has ushered in a new dimension in wireless communication technology, which has significantly influenced and benefited the human life
To be a suitable transceiver, an antenna has to be of low profile, convenient weight, low cost and congenial to the design of the mounting devices
It is evident from the figure that the fabricated design achieved a band from 2.63 GHz to more than 18 GHz for voltage standing wave ratio (VSWR) ≤ 2 which makes it suitable to be used in WiMAX, wireless fidelity (WiFi), wireless local area network (WLAN), UWB, C-band, X-band communication and microwave imaging applications
Summary
The advent of the new information era has ushered in a new dimension in wireless communication technology, which has significantly influenced and benefited the human life. A 41 × 41 mm size planar wearable antenna was presented by Ali et al (2016) The layout of this design comprises of a circular patch and a defected rectangular ground structure and achieved a bandwidth of 11.4 GHz. In 2016, Tran and Park propose a circular polarized resonant cavity antenna with high gain characteristics (Tran & Park 2016). To achieve a bandwidth of 3.1 GHz, a pair of complementary slots was inserted on the ground plane of the design proposed by Ghosh et al (2016) Though many of these reported antennas exhibit a wide operating band, some possess big sizes that limit their integration in portable devices while others possess complex layout resulting in cost ineffective for much production. The designed antenna achieved a super-wide bandwidth (2.85 GHz to around 18 GHz) due to proper impedance matching in between ground plane and patch
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