Performance enhancement of microstrip antenna using artificial magnetic conductor reflection phase characteristics

2021 ◽  
Author(s):  
Ali Jamali Arand ◽  
Bijan Abbasi Arand
Keyword(s):  
Microstrip Antenna ◽  
Performance Enhancement ◽  
Magnetic Conductor ◽  
Artificial Magnetic Conductor ◽  
Reflection Phase

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.

scholarly journals Improvements of trapezoid antenna gain using artificial magnetic conductor and frequency selective surface

2020 ◽  
Vol 20 (1) ◽  
pp. 281
Author(s):  
Siti Adlina Md Ali ◽  
Maisarah Abu ◽  
Siti Normi Zabri
Keyword(s):  
Human Body ◽  
High Frequency ◽  
Return Loss ◽  
Performance Enhancement ◽  
Frequency Selective Surface ◽  
Antenna Gain ◽  
Magnetic Conductor ◽  
Artificial Magnetic Conductor ◽  
Directive Antenna ◽  
Frequency Selective

<span>This paper presents the performance enhancement of the trapezoid antenna with Artificial Magnetic Conductor (AMC) and Frequency Selective Surface (FSS). The antenna, AMC and FSS structures are printed on 0.254 mm of RT/Duroid 5880 high frequency laminate. The performances of the antenna with and without AMC and FSS were evaluated. Three cases are analyzed; antenna alone, antenna with AMC and antenna with AMC-FSS. The 2x3 arrays of AMC and AMC-FSS were positioned at the back of the antenna with 6 mm air gap. The antenna alone works at 12 GHz, and shifted to 12.35 GHz and 12.33 GHz for case 2 and case 3, respectively. Despite the shift in the resonance, the antenna is still operating well at 12 GHz with a return loss            –16.70 dB for case 2 and–16.84 dB for case 3. Case 3 effectively enhanced the antenna gain from 4.43 dB to 6.74 dB and contributed to a directive antenna. Moreover, case 3 also successfully reduced the radiation of the antenna that penetrates into human body as the antenna is applied for on-body applications. </span>

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.

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