scholarly journals Low-Profile Wideband Unidirectional Circularly Polarized Metasurface-Based Bowtie Slot Antenna

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Cho Hilary Scott Nkimbeng ◽  
Heesu Wang ◽  
Ikmo Park
Keyword(s):  
Slot Antenna ◽  
Circularly Polarized ◽  
Low Profile

A printed wide-beamwidth circularly polarized antenna via two pairs of radiating slots placed in a square contour

2016 ◽  
Vol 9 (3) ◽  
pp. 649-656 ◽  
Author(s):  
Neng-Wu Liu ◽  
Lei Zhu ◽  
Wai-Wa Choi
Keyword(s):  
Ground Plane ◽  
Large Angle ◽  
Axial Ratio ◽  
Dielectric Substrate ◽  
Slot Antenna ◽  
Radiation Patterns ◽  
Circularly Polarized ◽  
Low Profile ◽  
Orthogonal Pairs ◽  
Good Agreement

A low-profile circularly polarized (CP) slot antenna to achieve a wide axial-ratio (AR) beamwidth is proposed in this paper. The radiating patch consists of two orthogonal pairs of parallel slots etched symmetrically onto a ground plane. Firstly, our theoretical study demonstrates that the CP radiation can be satisfactorily achieved at the broadside, when the vertical and horizontal paired-slots are excited in the same amplitude with 90° phase difference. Secondly, the principle of CP radiation of the proposed antenna on an infinite ground plane is described. Through analyzing the spacing between two parallel slots, the |Eθ| and |Eφ| radiation patterns can be made approximately identical with each other over a large angle range. As such, the slot antenna achieves a wide AR beamwidth. After that, the 3 dB AR beamwidth with respect to the size of a finite ground plane is investigated to constitute a practical CP antenna on a finite ground plane. In final, the proposed CP antenna with a 1–4 probe-to-microstrip feeding network is designed and fabricated on a finite ground plane of a dielectric substrate. Measured results are shown to be in good agreement with the simulated ones about the gain, reflection coefficient, AR bandwidth, and radiation patterns. Most importantly, a wide 3 dB AR beamwidth of 126° and low-profile property with the height of 0.036λ0 are achieved.

A low-profile wideband circularly polarized CPW slot antenna

2020 ◽  
pp. 153534
Author(s):  
Alireza Gharaati ◽  
Mohammad Saeid Ghaffarian ◽  
Hossein Saghlatoon ◽  
Mahdi Behdani ◽  
Rashid Mirzavand
Keyword(s):  
Slot Antenna ◽  
Circularly Polarized ◽  
Low Profile

scholarly journals A Low Profile High Gain Ultra Lightweight Circularly Polarized Annular Ring Slot Antenna for Airborne and Airship Applications

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 155048-155056
Author(s):  
Nouman Rasool ◽  
Huang Kama ◽  
Muhammad Abdul Basit ◽  
Mujeeb Abdullah
Keyword(s):  
High Gain ◽  
Slot Antenna ◽  
Circularly Polarized ◽  
Annular Ring ◽  
Low Profile

scholarly journals Substrate Integrated Waveguide Fed Cavity Backed Slot Antenna for Circularly Polarized Application

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Xiao Hong Zhang ◽  
Guo Qing Luo ◽  
Lin Xi Dong
Keyword(s):  
Axial Ratio ◽  
Slot Antenna ◽  
Substrate Integrated Waveguide ◽  
Circularly Polarized ◽  
Low Profile ◽  
Spurious Radiation ◽  
Metal Layers ◽  
Polarization Level ◽  
Slot Structure ◽  
Polarized Radiation

A novel planar low-profile cavity-backed slot antenna for circularly polarized applications is presented in this paper. The low-profile substrate integrated waveguide (SIW) cavity is constructed on a single PCB substrate with two metal layers on the top and the bottom surfaces and metallized via array through the substrate. The SIW cavity is fed by a SIW transmission line. The two orthogonal degenerate cavities resonanceTM110mode are successfully stimulated and separated. The circularly polarized radiation has been generated from the crossed-slot structure whose two arms’ lengths have slight difference Its gain is higher than 5.4 dBi, the peak cross-polarization level is lower than −22 dB, and the maximum axial ratio (AR) is about −1.5 dB. Compared with the previous presented low-profile cavity-backed slot antenna work, the spurious radiation from the proposed antenna’s feeding element is very low and it has less interference on the following circuits.

scholarly journals A Compact CPW-Fed Low-Profile Wideband Circularly Polarized Slot Antenna with a Planar Ring Reflector for GNSS Applications

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Jiade Yuan ◽  
Yujie Li ◽  
Zhimeng Xu ◽  
Jiamin Zheng
Keyword(s):  
Global Navigation Satellite System ◽  
Coplanar Waveguide ◽  
Axial Ratio ◽  
Satellite System ◽  
Slot Antenna ◽  
Navigation Satellite ◽  
Circularly Polarized ◽  
Low Profile ◽  
Global Navigation Satellite ◽  
Center Ring

A compact low-profile wideband circularly polarized slot antenna for global navigation satellite system (GNSS) is presented. The antenna comprises a planar slot radiator with a coplanar waveguide (CPW) feed and a modified ring-shaped reflector to achieve unidirectional radiation. The modified reflector is an inner square patch with four slantly cut corners, a center ring, and an outer ring with a notch; they significantly reduce the separation between the antenna radiator and reflector and therefore the overall antenna height. The overall dimensions are λ0/3 × λ0/3 × λ0/30 (λ0 denotes the free space wavelength at lower frequency). The measured −10 dB bandwidth of |S11|, 3-dB axial ratio (AR) bandwidth, and maximum gain are of 1.53–2.28 GHz, 1.558–1.672 GHz, and 5.87 dBi, respectively. The proposed antenna is simple without any additional feeding networks or shorting probes.

A low-profile triple-band circularly polarized wide slot antenna for wireless systems

2018 ◽  
Vol 11 (1) ◽  
pp. 67-75 ◽  
Author(s):  
Shilpee Patil ◽  
A. K. Singh ◽  
Binod K. Kanaujia ◽  
R. L. Yadava
Keyword(s):  
Ground Plane ◽  
Wireless Systems ◽  
Axial Ratio ◽  
Slot Antenna ◽  
Slot Antennas ◽  
Circularly Polarized ◽  
Rectangular Patch ◽  
Low Profile ◽  
Good Agreement ◽  
Triple Band

AbstractA simple design for triple-band circularly polarized (CP) wide slot antennas is proposed and experimentally investigated. The proposed antenna having a microstrip-fed rectangular patch with T-shaped notch for triple-band operation and a modified wide square slot on ground plane for CP operation. The measured 10 dB reflection bandwidths are 1.24% (≈340 MHz from 2.56 to 2.9 GHz), 9.63% (≈430 MHz from 4.25 to 4.68 GHz), and 5.34% (≈490 MHz from 8.93 to 9.42 GHz). The generated 3 dB axial ratio bandwidths of the proposed antenna are 7.54, 8.98, and 1.65% at operating frequencies around 2.65, 4.45, and 9.09 GHz, respectively. The measured peak gains within the 3 dB axial ratio bands are 3.03, 3.5, and 5.64 dBi. The simulated and measured results for the return loss, axial ratio, and antenna gain show a good agreement, which validate the antenna design.

Design of Dual Band Dual Sense Circularly Polarized Wide Slot Antenna with C-shaped Radiator for Wireless Applications

Frequenz ◽  
2018 ◽  
Vol 72 (7-8) ◽  
pp. 343-351 ◽  
Author(s):  
Shilpee Patil ◽  
A. K. Singh ◽  
Binod K. Kanaujia ◽  
R. L. Yadava
Keyword(s):  
Ground Plane ◽  
Axial Ratio ◽  
Dual Band ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Circularly Polarized ◽  
Wireless Applications ◽  
Centre Frequency ◽  
Low Profile ◽  
Peak Gain

Abstract A low profile wide slot antenna for dual band and dual sense circular polarization (CP) is proposed here and is simulated by using HFSS simulation software.The proposed antenna having a C shaped patch for dual band operation and a wide square slot etched on the ground with two strips for CP operation. In between radiating patch and ground plane, designed antenna has a layer of easily available dielectric (FR-4) material. Proposed antenna shows an impedance bandwidth of 13.8 % at 2.38 GHz of centre frequency and 9.7 % at 4.43 GHz of centre frequency for lower and upper band respectively. The 3-dB axial ratio (AR) bandwidths for lower and upper band are 18.8 % (at 2.44 GHz of centre frequency) and 13.3 % (at 4.29 GHz of centre frequency), respectively. The peak gain for the lower and upper band is found as 4.1 dBi and 3.3 dBi, respectively. A close agreement has been found between the simulated and the measured results.

Sign in / Sign up

Export Citation Format

Share Document