An Artificial Magnetic Conductor Backed Electrically Large Zero-Phase-Shift Line Grid-Loop Near-Field Antenna

2017 ◽  
Vol 65 (4) ◽  
pp. 1599-1606 ◽  
Author(s):  
Yunjia Zeng ◽  
Zhi Ning Chen ◽  
Xianming Qing ◽  
Jian-Ming Jin
Keyword(s):  
Phase Shift ◽  
Near Field ◽  
Magnetic Conductor ◽  
Artificial Magnetic Conductor ◽  
Zero Phase

A Directional, Closely Spaced Zero-Phase-Shift-Line Loop Array for UHF Near-Field RFID Reader Antennas

2018 ◽  
Vol 66 (10) ◽  
pp. 5639-5642 ◽  
Author(s):  
Yunjia Zeng ◽  
Zhi Ning Chen ◽  
Xianming Qing ◽  
Jian-Ming Jin
Keyword(s):  
Phase Shift ◽  
Near Field ◽  
Rfid Reader ◽  
Zero Phase

Design of a Near-Field Nonperiodic Zero Phase Shift-Line Loop Antenna With a Full Dispersion Characterization

2017 ◽  
Vol 65 (5) ◽  
pp. 2666-2670 ◽  
Author(s):  
Yunjia Zeng ◽  
Zhi Ning Chen ◽  
Xianming Qing ◽  
Jian-Ming Jin
Keyword(s):  
Phase Shift ◽  
Near Field ◽  
Loop Antenna ◽  
Zero Phase

scholarly journals Broadband RCS Reduction of Antenna with AMC Using Gradually Concentric Ring Arrangement

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Fuwei Wang ◽  
Yuhui Ren ◽  
Ke Li
Keyword(s):  
Phase Shift ◽  
Phase Difference ◽  
Frequency Band ◽  
New Method ◽  
Concentric Ring ◽  
Magnetic Conductor ◽  
Artificial Magnetic Conductor ◽  
Reflection Phase ◽  
Zero Degree ◽  
Incident Waves

This paper proposes a new method to the broadband RCS reduction with the artificial magnetic conductor (AMC) surfaces. The AMC surfaces can introduce a zero-degree reflection phase shift to incident waves. The phase difference between the antenna and AMC structures is 180°. Therefore, the AMC structures can be used to achieve RCS reduction. However, the bandwidth of zero-degree reflection phase of AMC structures is very narrow. In light of this, a novel gradually concentric ring arrangement AMC (GCRA-AMC) which can be applied to achieve the broadband RCS reduction is presented. The simulated and measured results show that the radiation performance of antennas is preserved when the GCRA-AMC is used. The RCS of the antenna with GCRA-AMC has been considerably reduced in a broad frequency band. The largest RCS reduction is more than 17 dB.

Review of Zero-Phase-Shift-Line Loop Antennas for UHF Near-Field RFID Readers

2017 ◽  
Vol 1 (4) ◽  
pp. 245-252 ◽  
Author(s):  
Zhi Ning Chen ◽  
Xianming Qing ◽  
Jin Shi ◽  
Yunjia Zeng
Keyword(s):  
Phase Shift ◽  
Near Field ◽  
Loop Antennas ◽  
Zero Phase ◽  
Rfid Readers

scholarly journals A Low-Profile HF Meandered Dipole Antenna with a Ferrite-Loaded Artificial Magnetic Conductor

2021 ◽  
Vol 11 (5) ◽  
pp. 2237
Author(s):  
Oh Heon Kwon ◽  
Won Bin Park ◽  
Juho Yun ◽  
Hong Jun Lim ◽  
Keum Cheol Hwang
Keyword(s):  
High Frequency ◽  
Dipole Antenna ◽  
Unit Cell ◽  
Operating Frequency ◽  
High Permeability ◽  
Magnetic Conductor ◽  
Artificial Magnetic Conductor ◽  
Low Profile ◽  
Compact Size ◽  
Binary Genetic Algorithm

In this paper, a low-profile HF (high-frequency) meandered dipole antenna with a ferrite-loaded artificial magnetic conductor (AMC) is proposed. To operate in the HF band while retaining a compact size, ferrite with high permeability is applied to the unit cell of the AMC. The operating frequency bandwidth of the designed unit cell of the AMC is 1.89:1 (19–36 MHz). Thereafter, a meandered dipole antenna is designed by implementing a binary genetic algorithm and is combined with the AMC. The overall size of the designed antenna is 0.06×0.06×0.002 λ3 at the lowest operating frequency. The proposed dipole antenna with a ferrite-loaded AMC is fabricated and measured. The measured VSWR bandwidth (<3) covers 20–30 MHz on the HF band. To confirm the performance of the antenna, a reference monopole antenna which operates on the HF band was selected, and the measured receiving power is compared with the result of the proposed antenna with the AMC.

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