A high‐gain cavity‐backed slot antenna using a perfect magnetic conductor ground plane and multilayered superstrates

2020 ◽  
Author(s):  
Majid Kialashaki ◽  
Ali Khaleghi ◽  
Mahboubeh Taraji
Keyword(s):  
Ground Plane ◽  
High Gain ◽  
Slot Antenna ◽  
Magnetic Conductor ◽  
Perfect Magnetic Conductor

A Low-Profile Broadband Circularly Polarised Wide-Slot Antenna with an Artificial Magnetic Conductor Reflector

2021 ◽  
Vol 36 (6) ◽  
pp. 740-746
Author(s):  
Fangfang Fan ◽  
Xiao Fan ◽  
Xiaoyu Wang ◽  
Zehong Yan
Keyword(s):  
Communication Systems ◽  
Ground Plane ◽  
Axial Ratio ◽  
High Gain ◽  
Slot Antenna ◽  
Magnetic Conductor ◽  
Average Gain ◽  
Artificial Magnetic Conductor ◽  
Low Profile ◽  
Metal Plates

In this letter, a novel broadband circularly polarisation (CP) wide-slot antenna with an artificial magnetic conductor (AMC) as the reflector is presented. The wide-slot antenna is composed of a knife-shaped radiator and an improved ground plane. A broadband CP characteristic can be achieved by slotting the ground plane to make it an asymmetric ground shape. However, the average gain of the wide-slot antenna is only about 3 dBic because of bidirectional radiation. An AMC reflector is adopted to enhance the gain of the wide-slot antenna without introducing a high profile similar to the PEC reflector. In addition, the four metal plates are vertically placed around the antenna to broaden the axial ratio (AR) bandwidth of the antenna with the AMC reflector. The measurement results show that the 3dB AR bandwidth of the proposed CP antenna is 32.4% (2.35GHz─3.26GHz), the average gain is 6.5dBic in the AR bandwidth and the value of VSWR in the AR bandwidth is less than 2. The size of the antenna is 0.84λ0× 0.84λ0× 0.13λ0 at the centre frequency of 2.805 GHz. The proposed antenna has a low profile, broad AR bandwidth and high gain, thereby being a good candidate for various wireless communication systems.

Analysis of Wideband Antenna Performance over Dual Band Artificial Magnetic Conductor (AMC) Ground Plane

2015 ◽  
Vol 735 ◽  
pp. 273-277 ◽  
Author(s):  
Raimi Dewan ◽  
M.K.A. Rahim ◽  
Mohamad Rijal Hamid ◽  
M.F.M. Yusoff
Keyword(s):  
Coplanar Waveguide ◽  
Ground Plane ◽  
Surface Current ◽  
Dual Band ◽  
Magnetic Conductor ◽  
Wideband Antenna ◽  
Antenna Performance ◽  
Perfect Magnetic Conductor ◽  
Additional Resonance ◽  
Unit Cells

A Coplanar Waveguide (CPW) wideband antenna operates from 2.69 GH to 6.27 GHz which act as reference antenna (RA) has been designed. A Dual Band AMC (DBAMC) unit cells have been proposed to operate at 2.45 GHz and 5.8 GHz. AMC is a metamaterial which mimics the behavior of zero reflection phase of Perfect Magnetic Conductor (PMC) at resonance frequency which not naturally existed in nature. Subsequently the antenna is incorporated with AMC unit cell, herein referred as Antenna with Dual Band AMC (ADBAMC). The DBAMC succesfully excites additional resonance at 2.45 GHz outside the initial operating range of standalone CPW wideband antenna. Incorporation of DBAMC to antenna achieves back lobe suppression at 2.45 GHz and 5.8 GHz. The overall average gain of AMC incorporated antenna is improved from 2.69 to 6.29 GHz as opposed to the standalone reference CPW wideband antenna. Study of surface current is also presented and discussed.

scholarly journals A High-gain and Low-scattering Waveguide Slot Antenna of Artificial Magnetic Conductor Octagonal Ring Arrangement

2016 ◽  
Vol 25 (1) ◽  
pp. 46-52 ◽  
Author(s):  
X. Liu ◽  
J. Gao ◽  
X. Y. Cao ◽  
Y. Zhao ◽  
W. Q. Li ◽  
...  
Keyword(s):  
High Gain ◽  
Slot Antenna ◽  
Magnetic Conductor ◽  
Artificial Magnetic Conductor ◽  
Waveguide Slot ◽  
Waveguide Slot Antenna

scholarly journals A Novel High-Gain Quad-Band Antenna with AMC Metasurface for Satellite Positioning Systems

2019 ◽  
Vol 9 (5) ◽  
pp. 4581-4585 ◽  
Author(s):  
A. Bousselmi ◽  
A. Gharsallah ◽  
T. P. Vuong
Keyword(s):  
Ground Plane ◽  
High Gain ◽  
Magnetic Conductor ◽  
Positioning Systems ◽  
Satellite Positioning ◽  
Compact Size ◽  
Radar Applications ◽  
Galileo Satellite ◽  
Wireless Communications Systems ◽  
Good Agreement

In this paper, a new design single feed multi-band antenna is presented. The proposed antenna is designed to operate at the 1.278GHz, 2.8GHz, 5.7GHz, and 10GHz frequency bands which cover the Galileo satellite positioning system (1.278GHz), WLAN (2.8GHz), WIMAX (5.7GHz) and the radar applications (10GHz), respectively. The antenna has a compact size, it is printed on an FR4 substrate of dimensions (60mm×27.5mm×1.67mm) placed on a ground plane of 60mm×17.5mm×0.035mm dimensions. To improve the radiation performance of the proposed antenna, an artificial magnetic conductor (AMC) was used as a reflector plane with dimensions of 13.5mm × 13.5mm × 1mm. The simulated and measured results are in good agreement and show the significant improvement of the gain value of the multiband antenna with AMC which is a required propriety for novel wireless communications systems.

Textile Artificial Magnetic Conductor Waveguide Sheet with Wire Dipoles for Body Centric Communication

2013 ◽  
Vol 64 (3) ◽  
Author(s):  
Kamilia Kamardin ◽  
Mohamad Kamal A. Rahim ◽  
Noor Asmawati Samsuri ◽  
Mohd Ezwan Jalil ◽  
Izni Husna Idris ◽  
...  
Keyword(s):  
Radiation Pattern ◽  
Ground Plane ◽  
High Gain ◽  
Magnetic Conductor ◽  
Artificial Magnetic Conductor ◽  
S Parameters ◽  
Phase Reflection

A textile Artificial Magnetic Conductor (AMC) sheet-like waveguide with wire dipoles were designed to investigate the possibility of improving transmission between antennas. The textile AMC sheet is made of fleece fabric with conductive patches and ground plane made of SHIELDIT fabric. The AMC surface is designed to have in-phase reflection at 2.45GHz with the objective to enhance the transmission between antennas. The S-parameters performance of the two antennas with textile AMC sheet was investigated thoroughly. The effect of different antennas’ placement and distance was also considered. Measurements were conducted rigorously to validate the simulated findings. Results show that the S21 transmission between antennas improved significantly when having the AMC waveguide sheet beneath them. Directive radiation pattern with high gain was also achieved with the proposed AMC sheet-like waveguide.

A Compact High Gain Multiband Bowtie Slot Antenna with Miniaturized Triangular Shaped Metallic Ground Plane

2021 ◽  
Vol 36 (7) ◽  
pp. 935-945
Author(s):  
Zaheer Dayo ◽  
Qunsheng Cao ◽  
Yi Wang ◽  
Permanand Soothar ◽  
Imran Khoso ◽  
...  
Keyword(s):  
High Performance ◽  
Frequency Tuning ◽  
Material Selection ◽  
Ground Plane ◽  
Surface Current ◽  
High Gain ◽  
Radiation Efficiency ◽  
Slot Antenna ◽  
Density Peak ◽  
Antenna Structure

This paper presents a new compact, high gain and multiband planar bowtie slot antenna. The antenna structure comprises of dielectric substrate, copper conducting sheet, fillet triangular-shaped slots, and a chamfered metallic ground plane. The proposed antenna model is fed with the 50 Ω standard grounded coplanar waveguide (GCPW) feedline. The designed antenna is low profile with compact dimensions of 0.379λ×0.186λ×0.012λ at 2.39 GHz frequency. Stable multi-resonant behavior of frequencies is obtained with the material selection, slots dimensions and position. Moreover, the parametric study has been carried out in order to validate the frequency tuning mechanism and impedance matching control. The novelty of designed antenna lies in high performance features which have been achieved with ultra-compact (0.039λ×0.022λ) modified triangular shaped metallic ground plane. The proposed antenna is fabricated and experimentally verified. The antenna key features in terms of return loss, surface current distribution, peak gain, radiation efficiency and radiation patterns have been analyzed and discussed. The designed radiator exhibits the excellent performance including strong current density, peak realized gain of 6.3 dBi, 95% radiation efficiency, wide fractional bandwidth of 39.5% and good radiation characteristics at in-band frequencies. The simulation and measured results are in good agreement and hence make the proposed antenna a favorable candidate for the advanced heterogeneous wireless communication applications.

Design of asymmetrically slotted hexagonal patch antenna for high-gain UWB applications

2014 ◽  
Vol 7 (5) ◽  
pp. 571-577
Author(s):  
Raghupatruni Venkat Siva Ram Krishna ◽  
Raj Kumar ◽  
Nagendra Kushwaha
Keyword(s):  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Plane ◽  
Frequency Selective Surface ◽  
High Gain ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Capacitive Reactance ◽  
Uwb Applications

A compact slot antenna for high-gain ultra wideband applications is presented. The slot is asymmetrically cut in the ground plane and is a combination of two rectangles. A hexagonal patch with two stepped coplanar waveguide-feed is used to excite the slot. The capacitive reactance of the hexagonal patch is neutralized by the inductive reactance created by the asymmetric slot and results into wider impedance matching. The measured impedance bandwidth of the proposed antenna is 11.85 GHz (2.9–14.75 GHz). The radiation patterns of the proposed antenna are found to be omni-directional in the H-plane and bi-directional in the E-plane. To enhance the gain of the antenna, a compact three-layer frequency selective surface (FSS) is used as a reflector. The overall thickness of the FSS is 3.5 mm. There is 4–5 dBi improvement in antenna gain after application of the FSS. The measured and simulated results are in good agreement.

Sign in / Sign up

Export Citation Format

Share Document