scholarly journals A High Gain Dual Polarized Ultra-Wideband Array of Antenna for Chipless RFID Applications

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 73702-73712 ◽  
Author(s):  
Fatemeh Babaeian ◽  
Nemai Chandra Karmakar
Keyword(s):  
High Gain ◽  
Ultra Wideband ◽  
Chipless Rfid ◽  
Wideband Array ◽  
Dual Polarized ◽  
Rfid Applications

scholarly journals Compact Dual-Polarized Vivaldi Antenna with High Gain and High Polarization Purity for GPR Applications

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 503
Author(s):  
Hai-Han Sun ◽  
Yee Hui Lee ◽  
Wenhao Luo ◽  
Lai Fern Ow ◽  
Mohamed Lokman Mohd Yusof ◽  
...  
Keyword(s):  
Impedance Matching ◽  
High Gain ◽  
Ultra Wideband ◽  
Compact Antenna ◽  
Oblique Position ◽  
Vivaldi Antenna ◽  
Dual Polarized ◽  
Ground Penetrating ◽  
Low Dispersion ◽  
Polarized Radiation

A compact ultra-wideband dual-polarized Vivaldi antenna is proposed for full polarimetric ground-penetrating radar (GPR) applications. A shared-aperture configuration comprising four Vivaldi elements for orthogonal polarizations is designed to reduce the low-end operating frequency and improve the port isolation with a compact antenna size. The directivity of the antenna is enhanced by the oblique position of the radiators and the implementation of a square loop reflector. Experimental results demonstrate that the antenna has very good impedance matching, port isolation, and dual-polarized radiation performance, with low dispersion characteristics across band of interest from 0.4 GHz to 3.0 GHz. GPR measurements with the designed antenna show that the antenna maintains good detection capability even for objects buried in a highly conductive soil.

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 Long reading range for the frequency coded Chipless RFID system based on reflectarray antennas

2018 ◽  
Vol 10 (2) ◽  
pp. 187-195 ◽  
Author(s):  
Maher Khaliel ◽  
Ahmed El-Awamry ◽  
Abdelfattah Fawky ◽  
Thomas Kaiser
Keyword(s):  
Antenna Arrays ◽  
Radio Frequency Identification ◽  
High Gain ◽  
Ultra Wideband ◽  
Pencil Beam ◽  
Rfid System ◽  
Chipless Rfid ◽  
Reader Antenna ◽  
Frequency Identification ◽  
Beam Characteristics

AbstractThis work proposes the utilization of a high gain and pencil beam reflectarray (RA) antenna at the reader of the frequency coded (FC) chipless radio-frequency identification (RFID) system to minimize the environmental reflections and increase the reading range. Moreover, the reader antenna should operate over ultra wideband (UWB) range of frequencies to accommodate multiple bits. However, the conventional antenna arrays cannot operate over UWB range of frequencies with high gain and pencil beam characteristics. Therefore, a novel UWB RA antenna dedicated to the chipless RFID reader is developed. The developed RA antenna operates over UWB range of frequencies from 4 to 6GHzto fulfill the requirements of the FC chipless RFID system. Therefore, the antenna is successfully integrated with the FC chipless RFID tags, and a reading range of 1mis achieved.

scholarly journals High Gain of Directional Ultra-Wideband Array Antenna Using Flat Reflector Structure for Microwave Imaging

2019 ◽  
Vol 557 ◽  
pp. 012018
Author(s):  
Mohd Aminudin Jamlos ◽  
W A Mustafa ◽  
Wan Khairunizam ◽  
I Zunaidi ◽  
Z M Razlan ◽  
...  
Keyword(s):  
High Gain ◽  
Microwave Imaging ◽  
Array Antenna ◽  
Ultra Wideband ◽  
Wideband Array

scholarly journals Towards an Efficient Chipless RFID System for Modern Applications in IoT Networks

2021 ◽  
Vol 11 (19) ◽  
pp. 8948
Author(s):  
Wazie M. Abdulkawi ◽  
N. Nizam-Uddin ◽  
Abdel Fattah A. Sheta ◽  
Ibrahim Elshafiey ◽  
Abdullah M. Al-Shaalan
Keyword(s):  
High Capacity ◽  
High Gain ◽  
Antenna System ◽  
Ultra Wideband ◽  
Rfid Tag ◽  
Rectangular Patch ◽  
System A ◽  
Rfid System ◽  
Chipless Rfid ◽  
Performance Validation

In this article, we present the design and validation of an efficient chipless RFID system. A multi-resonator chipless tag is designed and tested for high bit coding capacity. A high gain, ultra-wideband step-shape rectangular patch (USRP) antenna is proposed to validate the specificity of the tag in terms of its operation. The devised antenna is evaluated for various performance parameters, which recommend its suitability for testing and validation of high-capacity tags that can be deployed in modern applications, particularly in the Internet of Things (IoT) networks. A measurement setup is established to achieve performance validation of the tag over a significant range of 40 cm. There is close agreement between the measured and simulated results, which suggests that the proposed antenna system can be adopted in a similar measurement setup to test and validate the performance of any chipless RFID tag operating in the same bandwidth meant for IoT networks.

scholarly journals Wideband Dual-Polarized VHF Antenna for Space Observation Applications

Sensors ◽  
2020 ◽  
Vol 20 (15) ◽  
pp. 4351
Author(s):  
Alexandru Tatomirescu ◽  
Alina Badescu
Keyword(s):  
Radiation Pattern ◽  
Group Delay ◽  
High Gain ◽  
Antenna Element ◽  
Frequency Bandwidth ◽  
Radio Emissions ◽  
Relative Bandwidth ◽  
Pattern Stability ◽  
Dual Polarized ◽  
Delay Variation

This work presents the design for an antenna element that can be used in radio arrays for the monitoring and detecting of radio emissions from cosmic particles’ interactions in the atmosphere. For these applications, the pattern stability over frequency is the primary design goal. The proposed antenna has a high gain over a relative bandwidth of 88%, a beamwidth of 2.13 steradians, a small group delay variation and a very stable radiation pattern across the frequency bandwidth of 110 to 190 MHz. It is dual polarized and has a simple mechanical structure which is easy and inexpensive to manufacture. The measurements show that the ground has insignificant impact on the overall radiation pattern.

High Gain Printed Ultra Wideband Antenna Concept

2007 ◽  
Author(s):  
Veselin Brankovic ◽  
Adalbert Jordan ◽  
Djordje Simic ◽  
Jens Weber ◽  
Jagjit Bal
Keyword(s):  
High Gain ◽  
Ultra Wideband ◽  
Wideband Antenna
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