Novel Artificial Magnetic Conductor for 5G Application

2017 ◽  
Vol 5 (3) ◽  
pp. 636 ◽  
Author(s):  
Maizatun Muhamad ◽  
Maisarah Abu ◽  
Zahriladha Zakaria ◽  
Hasnizom Hassan
Keyword(s):  
Band Gap ◽  
Angular Stability ◽  
The Novel ◽  
Magnetic Conductor ◽  
Dispersion Diagram ◽  
Artificial Magnetic Conductor ◽  
Patch Shape ◽  
Reflection Phase ◽  
Specific Frequency

A design of novel bendable Artificial Magnetic Conductor (AMC) structures has been presented in this paper in two selected of frequencies at 5G application. These designs started with a square patch shape and continued with the combination of circular and Jerusalem shape which resonate at a frequency of 18 GHz and 28 GHz. Details of the theory and the structures of AMCs are explained. The reflection phase, bandwidth, angular stability and dispersion diagram were studied. The simulated results plotted that the novel AMC has good bandwidth and size is reduced by 53 percent and 55 percent for both frequencies. Other than that, it is also proved that the novel AMC has a stable reflection phase and no band gap performs at the specific frequency. The good performances of this novel AMC make it useful in order to improve antenna’s performance.

scholarly journals Novel Flexible Artificial Magnetic Conductor

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
M. E. de Cos ◽  
F. Las-Heras
Keyword(s):  
Reflection Coefficient ◽  
Oblique Incidence ◽  
Stability Margin ◽  
Laser Micromachining ◽  
Anechoic Chamber ◽  
Angular Stability ◽  
Polarization Angle ◽  
Magnetic Conductor ◽  
Artificial Magnetic Conductor

A novel flexible uniplanar AMC design is presented. An AMC prototype is manufactured using laser micromachining and it is characterized under flat and bent conditions by measuring its reflection coefficient phase in an anechoic chamber. The designed prototype shows broad AMC operation bandwidth (6.96% and higher) and polarization angle independency. Its angular stability margin, when operating under oblique incidence, is also tested obtaining±8°as limit for a 14.4 cm × 14.4 cm prototype.

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.

A wideband, compact, high gain, low-profile, monopole antenna using wideband artificial magnetic conductor for off-body communications

2021 ◽  
pp. 1-10
Author(s):  
Bidisha Hazarika ◽  
Banani Basu ◽  
Arnab Nandi
Keyword(s):  
High Gain ◽  
Monopole Antenna ◽  
Impedance Bandwidth ◽  
Magnetic Conductor ◽  
Artificial Magnetic Conductor ◽  
Reflection Phase ◽  
Low Profile ◽  
Independent Behavior ◽  
Integrated Antenna ◽  
Body Loading

Abstract A wideband staircase pattern defected ground monopole antenna integrated with an artificial magnetic conductor (AMC) reflector has been proposed for C-band (4–8 GHz) and ITU band (8.01–8.5 GHz) applications. The integrated antenna consists of a staircase antenna at top, a 2 × 2 AMC reflector at the bottom and an air substrate as gap between them. The AMC offers 18.5% ± 90° reflection phase bandwidth from 6.10 to 7.32 GHz. The AMC layer has achieved mu-negative properties in the designated band. The AMC proffers polarization independent behavior in the respective frequency band depicting robustness in AMC reflection phase characteristics. The integrated antenna has offered a wide impedance bandwidth of 2.78 GHz (42.8% at 6.5 GHz and 34.1% at 8.15 GHz) due to the defected ground monopole. The integration of wideband AMC beneath the staircase monopole antenna alters the out of phase radiation to in-phase planer pattern which enhances the peak gain up to 9.7 dB. It reduces the 1-g averaged specific absorption rate to 0.223 and 0.324 W/kg at the two designated bands. The structure maintains almost similar bandwidth and gain due to artificial human body loading.

scholarly journals Low Scattering Microstrip Antenna Based on Broadband Artificial Magnetic Conductor Structure

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 750 ◽  
Author(s):  
Muhammad Saleem ◽  
Xiao-Lai Li
Keyword(s):  
Microstrip Antenna ◽  
Energy Reduction ◽  
Destructive Interference ◽  
Magnetic Conductor ◽  
Artificial Magnetic Conductor ◽  
Reflection Phase ◽  
Radiation Properties ◽  
Unit Cells ◽  
Zero Degree ◽  
A New Technique

In this summary, we have suggested a new technique in which destructive interference principle is incorporated into a chessboard like a reflective screen, and the proposed antenna realizes a remarkable in-band and also out-of-band backscattered energy reduction by using a metasurface (MS). Two different MS unit cells are designed to provide the resonant frequency with a zero-degree reflection phase. Metasurface unit cells are configured in a chessboard-like reflector screen to achieve the reflection phase difference of 180° ± 37° over a broadband range of frequencies to redirect the scattering field into four quadrants. It is implemented to reduce the backscattered energy level of the microstrip antenna, which is based on destructive interference principle. The simulations indicate that the proposed antenna possesses significant backscattered energy reduction from 6 GHz to 16 GHz in both x– and y– polarization and also −10 dB backscattering reduction at antenna working band (7.4–7.8 GHz) is covered. Moreover, the radiation performance is preserved well and artificial magnetic conductor (AMC) unit cells work at different frequencies which are not influenced on the radiation properties. The bistatic performance of the antenna at different frequencies is also presented. Measurements and simulations of the fabricated design coincide well and the proposed design is verified and validated successfully.

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