Artificial Magnetic Conductor-based Millimeter Wave Microstrip Patch Antenna for Gain Enhancement

In this paper, a small (20 × 20 × 2.4 mm) loaded microstrip patch antenna (MPA) with an asymmetric artificial magnetic conductor (AMC) as a ground plane is designed for millimeter wave applications. Two AMC structures are proposed; one has the property of a 0° reflection phase around 28.4GHz, with a...

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Bibliographic Details
Published in:Journal of Telecommunications and Information Technology 2021, Vol.1 (2021), p.56-63
Main Authors: Belabbas, Khadidja, Khedrouche, Djamel, Hocini, Abdesselam
Format: Article
Language:English
Subjects:
Antennas
artificial magnetic conductor
Asymmetry
Bandwidths
Composite materials
Conductors
Design
Directivity
gain enhancemen
Geometry
Ground plane
Impedance matching
Microstrip antennas
microstrip patch antenna
millimeter wave
Millimeter waves
Musical performances
Patch antennas
Periodic structures
reflection phase
Structural stability
Unit cell
Wireless communications
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Summary:In this paper, a small (20 × 20 × 2.4 mm) loaded microstrip patch antenna (MPA) with an asymmetric artificial magnetic conductor (AMC) as a ground plane is designed for millimeter wave applications. Two AMC structures are proposed; one has the property of a 0° reflection phase around 28.4GHz, with a symmetric geometry, which makes the reflection phase insensitive to variations in both polarization and incident angle. This symmetric AMC structure ensures angular stability which is considered as a major requirement when periodic structures are used as antenna ground planes. The other structure is characterized by an asymmetric geometry and shows an interesting behavior around 28.6 GHz, where a discontinuity in the reflection phase appeared due to the fact that surface impedance nature changed from purely capacitive to purely inductive. This paper studies the effects of the two proposed AMC structures on the performance of MPAs, by using an array of 8 × 8 unit cell elements as an artificial ground plane. Simulation results show that an MPA with a symmetric AMC ground plane offers better impedance matching and a wider bandwidth. Compared with conventional MPAs, gain is enhanced and directivity is improved as well. As far as an MPA with an asymmetric AMC ground plane is concerned, its performance in terms of gain and directivity is higher than that of the conventional solution.
ISSN:1509-4553
1899-8852
DOI:10.26636/jtit.2021.148320