Gain-Enhanced of Triangular Microstrip Antenna Using Artificial Magnetic Conductor

This paper presents improvement of insert feed microstrip antenna with types of types of metamaterials. The antenna and the metamatrials were printed on a thin substrate, Rogers RT5880 with 0.254 mm thickness. Two types of metamaterials were introduced; Artificial Magnetic Conductor (AMC) and Frequency Selective Surface (FSS). The metamaterials were placed on the bottom of the antenna with no gap. Four cases were analyzed; antenna alone, antenna with AMC, antenna with FSS and antenna with multi-layer of FSS-AMC. Performances of the antenna were evaluated in terms of return loss, useful bandwidth and realized gain. The resonating frequency was shifted but still operate well at 28 GHz. Improvements in useful bandwidth from antenna alone and as it worked with all types of metamaterials. The realized gain was effectively improved from 1.76 dB up to 6.16 dB for the fourth cases. The design of insert feed microstrip antenna with types of thin metamaterials can be applied as a flexible applications in advanced sensors.

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A Broadband Artificial Magnetic Conductor Reflecting Screen and Application in Microstrip Antenna for Radar Cross-Section Reduction

IEEE Antennas and Wireless Propagation Letters ◽

10.1109/lawp.2018.2791662 ◽

2018 ◽

Vol 17 (3) ◽

pp. 405-409 ◽

Cited By ~ 12

Author(s):

Pei Yao ◽

Binzhen Zhang ◽

Junping Duan

Keyword(s):

Cross Section ◽

Microstrip Antenna ◽

Radar Cross Section ◽

Magnetic Conductor ◽

Artificial Magnetic Conductor

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Low Scattering Microstrip Antenna Based on Broadband Artificial Magnetic Conductor Structure

Materials ◽

10.3390/ma13030750 ◽

2020 ◽

Vol 13 (3) ◽

pp. 750 ◽

Cited By ~ 1

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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