A novel asymmetric patch reflectarray antenna with ground ring slots for 5G communication systems
The narrow bandwidth and low gain performances of a reflectarray are generally improved at the cost of high design complexity, which is not a good sign for high-frequency operation. A dual resonance asymmetric patch reflectarray antenna with a single layer is proposed in this work for 5G communicati...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | en |
| Published: |
MDPI AG
2020
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| Online Access: | http://eprints.utem.edu.my/id/eprint/25268/2/NOVEL%20ELECTRONICS-09-01450-V2%20%281%29.PDF http://eprints.utem.edu.my/id/eprint/25268/ https://www.mdpi.com/2079-9292/9/9/1450/htm https://doi.org/10.3390/electronics9091450 |
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| Summary: | The narrow bandwidth and low gain performances of a reflectarray are generally improved at the cost of high design complexity, which is not a good sign for high-frequency operation. A dual resonance asymmetric patch reflectarray antenna with a single layer is proposed in this work for 5G communication at 26 GHz. The asymmetric patch is developed from a square patch by tilting its one vertical side by a carefully optimized inclination angle. A progressive phase range of 650◦ is acquired by embedding a circular ring slot in the ground plane of the proposed element for gain improvement. A 332-element, center feed reflectarray is designed and tested, where its high cross polarization is suppressed by mirroring the orientation of asymmetric patches on its surface. The asymmetric patch reflectarray offers a 3 dB gain bandwidth of 3 GHz, which is 4.6% wider than the square patch reflectarray. A maximum measured gain of 24.4 dB has been achieved with an additional feature of dual linear polarization. Simple design with wide bandwidth and high-gain of asymmetric patch reflectarray make it suitable to be used in 5G communications at high frequencies. |
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