Analysis and design of tapered slot antenna with high gain for ultra‐wideband based on optimisation of the metamaterial unit layout

2017 ◽  
Vol 11 (6) ◽  
pp. 907-914 ◽  
Author(s):  
Lei Sang ◽  
Xiangxiang Li ◽  
Tao Chen ◽  
Guoqiang Lv
Keyword(s):  
High Gain ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Analysis And Design

scholarly journals Low Side Lobe Tapered Slot Antenna with High Gain Using Gradient Refractive Index Metamaterial for Ultra Wideband Application

2017 ◽  
Vol 6 (4) ◽  
pp. 63-69 ◽  
Author(s):  
R. Singha ◽  
D. Vakula
Keyword(s):  
Refractive Index ◽  
Beam Width ◽  
Parallel Line ◽  
Side Lobe ◽  
High Gain ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Side Lobe Level ◽  
Beam Focusing ◽  
Gradient Refractive Index

A broadband gradient refractive index (GRIN) metamaterial is used to improve the gain of the tapered slot antenna. The proposed metamaterial is capable of reducing the side lobe level of the antenna. The gradient refractive index (GRIN) metamaterial is constructed by using non-resonant parallel-line unit cells with different refractive index. Due to the non-resonant structure, the proposed unit cell exhibits low loss and large frequency bandwidth. The metamaterial, whose effective refractive index is lower than that of the substrate on which the antenna is printed. Therefore, the proposed metamaterial is act as a regular lens in beam focusing. The GRIN metamaterial is integrated in front of the antenna which has the capability to manipulate electromagnetic wave accurately. The measurement results indicate that the reflection coefficient of the antenna is below -10 dB over the frequency band from 3 to 11 GHz. The radiation pattern of the antenna shows the beam width becomes narrow and directive with low side lobe level. The peak gain is increased by 2.1 dB at 9.5 GHz.

Analysis and design of tapered slot antenna for ultra-wideband applications

2009 ◽  
Vol 14 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Yuan Yao ◽  
Wenhua Chen ◽  
Bin Huang ◽  
Zhenghe Feng ◽  
Zhijun Zhang
Keyword(s):  
Ultra Wideband ◽  
Slot Antenna ◽  
Analysis And Design

Ultra-wideband and high gain antipodal tapered slot antenna with planar metamaterial lens

2021 ◽  
pp. 1-11
Author(s):  
Ziye Wang ◽  
Zhengwei Yang ◽  
Xiao Zhao ◽  
Linyan Guo ◽  
Minjie Guo
Keyword(s):  
Ground Penetrating Radar ◽  
Imaging System ◽  
Single Layer ◽  
High Gain ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Planar Lens ◽  
Unit Cells ◽  
Ground Penetrating

Abstract To solve the problems of low gain, narrow bandwidth, and poor radiation directivity of conventional ground penetrating radar antenna, this paper proposes an ultra-wideband and high-gain antipodal tapered slot antenna (ATSA) with planar metamaterial lens. As a constituent part of this lens, a new non-resonant metamaterial unit cell is introduced and analyzed by the full-wave simulation tool. The single-layer planar lens composed of the designed unit cells with different sizes is placed in the maximum radiation direction of the ATSA to greatly enhance its radiation capability. The proposed planar lens antenna has a wide impedance bandwidth of 107.4% (2.41–8 GHz) and −3 dB gain bandwidth of 54.5% (4–7 GHz), respectively. The gain increases averagely by 6.0 dB in the whole operating frequency band, and the peck gain reaches 15.4 dBi at 5.5 GHz. And its excellent performance shows a high application prospect in ground penetrating radar and microwave imaging system.

scholarly journals Dual-Polarized Dual-Loop Double-Slot Antipodal Tapered Slot Antenna for Ultra-Wideband Radar Applications

Electronics ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1377
Author(s):  
Guangyao Yang ◽  
Shengbo Ye ◽  
Feng Zhang ◽  
Yicai Ji ◽  
Xiaojuan Zhang ◽  
...  
Keyword(s):  
Low Frequency ◽  
High Gain ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Loop Structure ◽  
Cross Polarization ◽  
Dual Polarized ◽  
Wideband Radar ◽  
Better Than

The miniaturized high-gain antenna is required in portable, ultra-wideband radar systems. However, the miniaturization, ultra-wideband and high gain often restrict each other in the antenna design. In this paper, a dual-polarized, double-slot, antipodal tapered slot antenna with a double-layer, dual-loop structure and novel slot edges is presented. The proposed magnetic dual-loop structure has the capacity to reduce the low cut-off frequency of the double-slot tapered slot antenna by weakening the resonance and coupling. In addition, the high gain, low sidelobe level (SLL), and low cross-polarization level are achieved in the boresight direction. A novel gradient slot profile is designed to improve the low-frequency directivity of the tapered slot antenna without affecting the matching. To feed the antenna elements, a kind of wideband, balun-divider structure is designed. The dual-polarized antenna is combined by two orthogonal elements in a cross configuration without galvanic contact or influence to performance. The measured results show that the impedance bandwidth of the proposed antenna is 0.6~4 GHz, and the maximum gain is 11 dBi. The isolation between the two antenna ports is better than 32 dB, and the cross-polarization discrimination (XPD) is better than 20 dB.

scholarly journals Gain Enhancement of Double-Slot Vivaldi Antenna using Corrugated Edges and Semicircle Director for Microwave Imaging Application

2021 ◽  
Vol 21 (2) ◽  
pp. 85
Author(s):  
Findi Nur Witriani ◽  
Yahya Syukri Amrullah ◽  
Fajri Darwis ◽  
Taufiqqurrachman Taufiqqurrachman ◽  
Yusuf Nur Wijayanto ◽  
...  
Keyword(s):  
Medical Profession ◽  
High Gain ◽  
Microwave Imaging ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Gain Enhancement ◽  
Imaging Application ◽  
Vivaldi Antenna ◽  
Compact Design ◽  
Slot Structure

Microwave imaging, such as images for radiological inspection in the medical profession, is one of the applications utilized in ultra-wideband (UWB) frequency ranges. The Vivaldi antenna is one of the most popular antennas for this purpose. The antenna is utilized because of its simple, lightweight, and compact design, as well as its excellent efficiency and gain capabilities. In this work, we present a high-gain Vivaldi antenna for microwave imaging applications. The proposed Vivaldi antenna is designed using a double-slot structure method with the addition of corrugated edges and a semicircle director aimed at improving the gain. The antenna is designed to operate at frequencies ranging from 3.1 to 10.6 GHz. Based on the modeling findings, the suggested antenna attain a bandwidth of 7.5 GHz with operating frequencies from 3.1 GHz to 10.6 GHz for a VSWR of less than two. In comparison to a typical single slot antenna, the suggested antenna provides a substantial boost in gain performance. The increase in gain is proportional to the frequency of operation. The constructed antenna has a lower bandwidth than the simulated one, with operating frequencies of 3.5 GHz – 3.75 GHz and 4.25 – 10.89 GHz, respectively, and useable bandwidths of 250 MHz and 6.64 GHz. All these results suggest that the antenna is suitable for microwave imaging 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.

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