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A Wideband Low-Profile All-Metal Cavity Slot Antenna With Filtering Performance for Space-Borne SAR Applications

Fang, Xiaochuan, Wang, Wei, Huang, Guan-Long, Luo, Qi, Zhang, Hongtao (2019) A Wideband Low-Profile All-Metal Cavity Slot Antenna With Filtering Performance for Space-Borne SAR Applications. IEEE Antennas and Wireless Propagation Letters, 18 (6). pp. 1278-1282. ISSN 1536-1225. (doi:10.1109/LAWP.2019.2914604) (KAR id:75532)

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http://dx.doi.org/10.1109/LAWP.2019.2914604

Abstract

This letter presents a wideband all-metal cavity slot antenna with a filtering performance for space-borne synthetic aperture radar applications. The proposed antenna element consists of a metal cavity and several radiation slots. It is fabricated by aluminium through milling and welding process, the techniques of which are reliable for the space environment. Benefiting from multiresonances of the cavity and slots, the antenna is able to obtain a wide operating bandwidth. Additionally, the cavity has a very low profile of 2.8 mm, equivalent to 0.093 wavelength at the central operating frequency. An 8 × 12 antenna array is designed, fabricated, and measured for performance verification. The measured impedance bandwidth with S 11 <;-10 dB is achieved from 7.2 to 12.2 GHz, giving a relative bandwidth of 51%. Furthermore, it shows good filtering characteristic with more than 20 dB out-of-band rejections, which is capable to suppress unwanted interferences and contribute to a good electromagnetic compatibility design

Item Type: Article
DOI/Identification number: 10.1109/LAWP.2019.2914604
Uncontrolled keywords: All-metal cavity, filtering, low-profile, spaceborne synthetic aperture radar (SAR), wideband
Divisions: Faculties > Sciences > School of Engineering and Digital Arts
Depositing User: Qi Luo
Date Deposited: 24 Jul 2019 11:41 UTC
Last Modified: 12 Aug 2019 15:28 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/75532 (The current URI for this page, for reference purposes)
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