scholarly journals Tri Band CP Slot Antenna Backed with Dual FSS Reflector

2019 ◽  
Vol 8 (6S2) ◽  
pp. 924-927
Keyword(s):  
Circular Polarization ◽  
Simple Structure ◽  
Frequency Selective Surface ◽  
High Gain ◽  
Slot Antenna ◽  
Dual Frequency ◽  
Circularly Polarized ◽  
Feed Line ◽  
Slot Structure ◽  
Peak Gain

A tri band, Multi layer circularly Polarized (CP) slot antenna backed with dual frequency Selective surface with incremental feed-line is designed and fabricated. The design consists of two crescent shaped slots with incremental feed line and two reflectors. The half moon shaped structure employs circular polarization with beam tiled problem can be overcome by dual slot structure backed with FSS, a high gain is obtained. The measured results offer an 11.84 %( 4.21 GHz–4.74 GHz), 11.83 %( 5.9-6.7 GHz), 5.9 %( 7.9-8.4 GHz) CP bandwidth. By introducing the dual FSS reflector, 11.1 dBi of peak gain is also obtained at 6 GHz which is greatly enhanced when compared with the antenna without FSS. A high gain is obtained with simple structure for CP bandwidth is simulated and measured.

scholarly journals Metallic Reflector-Based X-Band Circularly Polarized Hollow Dielectric Resonator Antenna for High Gain in UWB Applications

2021 ◽  
Author(s):  
SACHIN KUMAR YADAV ◽  
Amanpreet Kaur ◽  
Rajesh Khanna
Keyword(s):  
Circular Polarization ◽  
Dielectric Resonator ◽  
Near Field ◽  
Axial Ratio ◽  
High Gain ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Circularly Polarized ◽  
X Band ◽  
Peak Gain

Abstract A circularly polarized hollow dielectric resonator antenna (CPHDRA) is designed for X-band applications. Rectangular dielectric resonator (RDR) is used as a radiator element, fed by a quarter-wave transformer (QWT) feedline. By performance of the RDR antenna, an air cylindrical rod structure is extracted from RDR to enhance the gain and impedance bandwidth. Two parasitic strips are placed on the top of the RDR to achieve circular polarization with reported ≤ 3-dB axial ratio (AR) bandwidth for X-band applications. In this article, UWB antenna covers range from 2.74 to 10.4GHz by using asymmetrical defective ground structure (DGS). In near field of the dielectric resonator, three different radiating modes namely HE11δ, HE21δ, HE23δ, and HE32δ are at 4.4, 6, 8.8, and 9.9 GHz. For the generation of circular polarization (CP), two orthogonal modes are generated at 8.8 and 9.9 GHz as per XZ and YZ planes. It has reported 23.8 % (8 to 10.1 GHz) of 3-dB AR bandwidth. The simulated and measured impedance bandwidths are 118.46 % and 121.12 % along with a peak gain of 6.55 dB without the use of a metallic reflector. By using a metallic reflector suspended in the bottom side of the substrate with a distance of 13.1mm is reported along with the peak gain of 9.8 dBi.

A Compact Wideband Dual-Circular Polarization CPW-Fed Slot Antenna

2020 ◽  
Vol 35 (10) ◽  
pp. 1200-1206
Author(s):  
Zhao Jiang ◽  
Shi Huang ◽  
Zhi Wang ◽  
Xiao Zhao ◽  
Ting Wan
Keyword(s):  
Circular Polarization ◽  
Standing Wave ◽  
Simple Structure ◽  
Coplanar Waveguide ◽  
Axial Ratio ◽  
Voltage Standing Wave Ratio ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Feed Line

A compact wideband coplanar waveguide (CPW) excited slot antenna with dual-circular polarization (DCP) is presented and fabricated in this paper. Two inverted-L-shaped patches are implanted in a square slot to achieve wideband DCP characteristic. The feed line is terminated on an inverted-L-shaped patch. Moreover, two rectangular slots are added on the corners of the antenna to improve the bandwidth of axial ratio (AR) and the voltage standing wave ratio (VSWR). The simulated results show that the designed antenna can generate a good impedance bandwidth of 70.4% and a 3-dB AR bandwidth of 48.6%, respectively. This antenna possesses the qualities of small size, simple structure, and good dual-circular polarization.

scholarly journals A Wideband Circularly Polarized Slot Antenna Backed by a Frequency Selective Surface

2019 ◽  
Vol 19 (3) ◽  
pp. 166-171 ◽  
Author(s):  
Puneeth Kumar Tharehalli Rajanna ◽  
Karthik Rudramuni ◽  
Krishnamoorthy Kandasamy
Keyword(s):  
Frequency Selective Surface ◽  
Slot Antenna ◽  
Circularly Polarized ◽  
Frequency Selective

A polarization and band reconfigurable cross-slot antenna for multiband application

2019 ◽  
Vol 11 (10) ◽  
pp. 1054-1060
Author(s):  
Kapil Saraswat ◽  
A. R. Harish
Keyword(s):  
Electric Field ◽  
Ground Plane ◽  
Slot Antenna ◽  
Circularly Polarized ◽  
Design Concepts ◽  
Feed Line ◽  
Polarized Waves ◽  
Linearly Polarized ◽  
Microstrip Feed Line ◽  
Microstrip Feed

AbstractA polarization and band reconfigurable cross-slot antenna for multiband applications is presented in this paper. The antenna consists of four p–i–n diodes embedded in the cross-shaped slot in a ground plane and excited by a microstrip feed line. The p–i–n diodes are placed in such a way that they produce multiple bands, with linearly and circularly polarized (CP) radiation. By switching the states of the p–i–n diodes, the sense of rotation of the electric field in CP radiation can be reconfigured. The proposed structure can be configured to produce two bands that radiate linearly polarized waves or three bands, where, two are linearly polarized and one is CP. The proposed design concepts are validated bythe CST studio suite as well as measurementsare carried out on fabricated prototypes.

Sign in / Sign up

Export Citation Format

Share Document