A Novel Ultrawideband Transmitarray Design Using Tightly Coupled Dipole Elements

Cai, Yuan-Ming, Li, Wenting, Li, Ke, Gao, Steven, Yin, Yingzeng, Zhao, Luyu, Hu, Wei (2019) A Novel Ultrawideband Transmitarray Design Using Tightly Coupled Dipole Elements. IEEE Transactions on Antennas and Propagation, 67 (1). pp. 242-250. ISSN 0018-926X. (doi:10.1109/TAP.2018.2878079) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided)

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Abstract

One of the key challenges in transmitarray (TA) designs is its narrow bandwidth. To overcome this limitation, this paper proposes a novel design of ultrawideband TA antenna based on tightly coupled dipole arrays (TCDAs). The array consists of 20 × 10 unit cells, and each unit cell is composed of a pair of short dipoles connected with a section of meandered transmission line. The size of each unit cell is 20 mm × 10 mm, which is about 0.2λ × 0.1λ, where λ is the wavelength in free space at the lowest working frequency of the TA. By utilizing the strong coupling between adjacent units of the TA, the bandwidth of the TA is improved significantly. To verify the design concept, one prototype of the proposed TA is fabricated and measured. The prototype demonstrates good performance over a bandwidth of 104%, i.e., from 3.0 to 9.5 GHz, which is significantly wider than that of other TAs reported in the literature. Within the working band of the TA antenna, the radiation pattern is stable and no distortion or splitting of the main beam of the antenna is observed. This is the first time that the TA based on TCDA is reported.

Item Type: Article
DOI/Identification number: 10.1109/TAP.2018.2878079
Divisions: Faculties > Sciences > School of Engineering and Digital Arts
Depositing User: Steven Gao
Date Deposited: 05 Jun 2019 10:51 UTC
Last Modified: 05 Jun 2019 14:34 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/74263 (The current URI for this page, for reference purposes)
Gao, Steven: https://orcid.org/0000-0002-7402-9223
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