Circularly polarized inverted stacked high gain antenna with frequency selective surface

Abstract

In this work; the novel design of dumbbell shaped frequency selective surface (FSS) is demonstrated as superstrate. The array of this designed FSS structure is incorporated on two different antennas; (1) Microstrip Patch Antenna (MPA), and (2) Inverted Stacked Microstrip Patch Antenna (ISMPA). The FSS unit cell reflection magnitude is nearly 0.95 in the vicinity of both antennas resonance frequencies. Based on the ray tracing phenomenon multiple reflections occur between superstate and ground plane. So by this phenomenon the gain of circular patch and the ISMPA is enhanced by 6.02 dBic and 5.1 dBic respectively. In the measured results, the impedance bandwidth of MPA and ISMPA are 6.66% (5.8-6.2 GHz) at 6 GHz center frequency and 5.3%

Gain enhancement of a quad notched CPW fed UWB antenna

“…Previous to this work, different researchers [12][13][14] have also proposed quad notched antenna with different techniques but with the less gain. Different techniques for high gain antenna is reported [15][16][17][18][19][20][21] recently by using concept of artificial magnetic conductor, 15 beam steering, 16 and metamaterial. 17 To achieve high gain one of the possible ways is stacked configuration 18-21 of the antenna, keeping the size same in horizontal plane.…”

An FSS‐employed UWB antenna system for high‐gain portable devices

“…Moreover, they may also be employed to alter the polarization state of an antenna . FSS superstrates offer low profile and less complex configuration as compared to bulky metallic reflectors employed in antennas …”

“…In Reference , a superstrate with vias is designed to improve gain of a resonant patch antenna having 5.65‐5.87 GHz band. A truncated dumbbell‐shaped FSS superstrate screen is reported in Reference . This superstrate enhances gain of a circularly polarized patch antenna having bandwidth of 5.2‐5.9 GHz by 6 dBi.…”

“…6 FSS superstrates offer low profile and less complex configuration as compared to bulky metallic reflectors employed in antennas. 7 In the reported literature, a number of FSS configurations are reported for performance, in particular gain enhancement of antennas. In Reference 8, a superstrate with vias is designed to improve gain of a resonant patch antenna having 5.65-5.87 GHz band.…”

A Compact and Stable Frequency Selective Surface for WLAN Applications

“…One of its main uses is the integration with antennas systems acting as radomes and subreflectors, the latter is applied to separate electromagnetic waves into different frequency bands. These applications also includes bandpass and bandstop spatial filters, absorbers, artificial electromagnetic bandgap materials, uses as superstrate of antenna or antenna array to enhance the directivity and gain [5], [6], [7]. Currently, FSS with polarization independent, angular stability, and multiband or wideband characteristics (transmission or reflection), has received special attention [8], [9], [10].…”