Circularly polarized planar monopole antenna for ultrawideband applications

Abstract

A broadband circularly polarized (CP) planar monopole antenna is proposed here for ultrawideband (UWB) communication. The antenna is composed of a modified annular ring patch fed by a tapered microstrip line and a rectangular semiground plane on the opposite side of the substrate. Capability of generating wide axial ratio bandwidth (ARBW) is another feature of the proposed antenna. Wide ARBW is achieved by introducing a rectangular slot and a stub in the ground plane. The CP antenna has an impressive ARBW of 5.52 GHz (81.42%, 4.02-9.54 GHz) within the UWB frequency range (3.

CPW-Fed Super-Wideband Antenna With Modified Vertical Bow-Tie-Shaped Patch for Wireless Sensor Networks

“…Using the U-shaped feedline, the reported design attained a working band ranging from 3.1-13.2 GHz. The antenna reported in [5] demonstrates better miniaturization with an overall footprint of 580 mm 2 when compared to the patch antenna with modified partial ground plane [7], a diamond-shaped radiating patch with partial multi-slotted ground plane [8], bird face-shaped patch with a single slotted limited ground plane [10], modified slotted U-shaped antenna [11], hibiscus petal-shaped radiator and small trapezoid ground plane [12], modified annular ring-shaped radiator with rectangular semi ground [13], corner truncated rectangular patch with single slotted ground plane [14], the circular patch with iterations of a hexagonal slot [16], annular ring-shaped radiator with small ground plane [18], circular radiator with hexagonal-square-shaped fractal geometry and partial ground plane [20], and semi-circular radiator with small trapezoid ground plane [23]. However, in microstrip line-fed antennas, the space available on both sides of the substrate is not entirely used resulting in elevated fabrication cost during mass production.…”

A new type of compact ultra‐wideband planar fractal antenna with WLAN band rejection

“…Fractal geometries are also commonly used to achieve UWB characteristics with lower cutoff frequency . In the published literature, several UWB antenna designs with notch band characteristics in allocated frequency bands have been reported …”

Broadband Circular Polarised Printed Antennas for Indoor Wireless Communication Systems: A Comprehensive Review

“…These conducting components are etched on a dielectric material plane (substrate) with known properties and dimensions. These antennas fall into two different configurations in terms of the location of the ground plane, feeding line and radiator patch; that is, they can be microstrip-fed printed monopole antennas (Figure 20) [117] or CPW-fed printed monopole antennas [16] (Figure 21). To address the relentless demand for minimising the number of indoor antenna elements within an indoor environment, designers have focused on BCPPMAs with circular polarisation that can cover most wireless communication bands.…”

“…These conducting components are etched on a dielectric material plane (substrate) with known properties and dimensions. These antennas fall into two different configurations in terms of the location of the ground plane, feeding line and radiator patch; that is, they can be microstrip-fed printed monopole antennas ( Figure 20 ) [ 117 ] or CPW-fed printed monopole antennas [ 16 ] ( Figure 21 ).…”

“… A microstrip-fed monopole: ( a ) front side; ( b ) back view; ( c ) measured radiation patterns at 5.2 GHz [ 117 ]. …”