Wideband and high-gain triple-offsets-fed ring-slot antenna backed by a ground plane

2004 ◽  
Vol 41 (3) ◽  
pp. 161-163 ◽  
Author(s):  
Yong-Woong Jang ◽  
Hiroyuki Arai
Keyword(s):  
Ground Plane ◽  
High Gain ◽  
Slot Antenna

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.

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.

UWB circularly polarised slot antenna with modified ground plane and L‐shaped radiator

2018 ◽  
Vol 54 (15) ◽  
pp. 918-920 ◽  
Author(s):  
Rui Xu ◽  
Jianying Li ◽  
Jie Liu ◽  
Shi Gang Zhou ◽  
Kun Wei
Keyword(s):  
Ground Plane ◽  
Slot Antenna

Broadband RCS reduction and high gain waveguide slot antenna with orthogonal array of polarisation‐dependent AMC

2013 ◽  
Vol 49 (21) ◽  
pp. 1312-1313 ◽  
Author(s):  
Yi Zhao ◽  
Xiang‐yu Cao ◽  
Jun Gao ◽  
Wen‐qiang Li
Keyword(s):  
Orthogonal Array ◽  
High Gain ◽  
Slot Antenna ◽  
Waveguide Slot ◽  
Waveguide Slot Antenna

HIGH-GAIN SLOT ANTENNA WITH PARASITIC PATCH AND WINDOWED METALLIC SUPERSTRATE

2010 ◽  
Vol 15 ◽  
pp. 27-36 ◽  
Author(s):  
Zhi-Hong Tu ◽  
Qing-Xin Chu ◽  
Qiu-Yi Zhang
Keyword(s):  
High Gain ◽  
Slot Antenna ◽  
Parasitic Patch

Coplanar waveguide-fed ISM band implantable crossed-type triangular slot antenna for biomedical applications

2013 ◽  
Vol 6 (2) ◽  
pp. 167-172 ◽  
Author(s):  
Srinivasan Ashok Kumar ◽  
Thangavelu Shanmuganantham
Keyword(s):  
Biomedical Applications ◽  
Biomedical Application ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
High Gain ◽  
Slot Antenna ◽  
Center Frequency ◽  
Ism Band ◽  
High Data ◽  
Implantable Antenna

A novel coplanar waveguide fed Industrial, Scientific, and Medical (ISM) band implantable crossed-type triangular slot antenna is proposed for biomedical applications. The antenna operates at the center frequency of 2450 MHz, which is in ISM band, to support GHz wideband communication for high-data rate implantable biomedical application. The size of the antenna is 78 mm3 (10 mm × 12 mm × 0.65 mm). The simulated and measured bandwidths are 7.9 and 8.2% at the resonant frequency of 2.45 GHz. The specific absorption rate distribution induced by the implantable antenna inside a human body tissue model is evaluated. The communication between the implanted antenna and external device is also examined. The proposed antenna has substantial merits such as miniaturization, lower return loss, better impedance matching, and high gain over other implanted antennas.

Sign in / Sign up

Export Citation Format

Share Document