Abstract
This paper reports a new design of broadband monopole patch antenna. The proposed antenna possess corner truncated rectangular patch with slits and defected ground structure, these modifications considerably improves the impedance bandwidth to 41.29% over a wideband (5.1–7.59 GHz). The design is appropriate for wireless communication including WLAN IEEE 802.11 g/a (5.15–5.35 GHz and 5.725–5.825 GHz) and C Band (4–8 GHz) applications. An antenna prototype is fabricated using FR-4 with an electrical permittivity of 4.4. Experimental and numerical simulations of antenna’s radiation characteristic are also reported and exhibits good concurrence.
Highlights
Microstrip patch antennas are favoured over other antenna configurations due to its features appropriate primarily for applications operative in higher frequency range including RF and microwave region
In its modest form the microstrip antennas has patch positioned on the top with negligible thickness as compared to dielectric substrate placed in the middle, followed by ground plane at the bottom
The antenna structure has ground plane which is defected with three rectangular slots and modified U-shaped rectangular patch
Summary
Microstrip patch antennas are favoured over other antenna configurations due to its features appropriate primarily for applications operative in higher frequency range including RF and microwave region. Due to rapid growth of microwave and wireless communication applications, the role of small-sized devices such as compact antennas is increasing day by day. The various techniques including use of multiple resonators, etching slots in the antenna geometry, stacked patches, shorting pin, introduction of air gap for obtaining improved radiation performance have been reported in past [14,15,16,17,18]. In order to protect the microstrip patch antennas from the adverse effects of dielectric and surface wave losses, use of defected ground structures is one of the methods to mitigate such kinds of losses. The antenna structure has ground plane which is defected with three rectangular slots and modified U-shaped rectangular patch. The properties like reflection coefficient, bandwidth, gain, radiation patterns, and voltage standing wave ratio (VSWR) are simulated and verified experimentally for the proposed geometry
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