Compact and wideband cavity-backed antenna with elliptical coupling slot and elliptical aperture for satellite communications transceiver applications

IF 1.6 4区地球科学 Q3 ASTRONOMY & ASTROPHYSICS

Radio Science Pub Date : 2025-02-01 DOI:10.1029/2024RS008120

Y. Asci;C. Turkmen;M. Secmen

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引用次数: 0

Abstract

A wideband full-metal cavity-backed antenna with elliptical coupling slot and elliptical aperture is proposed. The antenna consists of two elliptical structures, a coupling slot and a radiating aperture, which are placed on the feed waveguide side and the load side of a rectangular metal cavity resonator, respectively. By using an elliptical slot/aperture, the impedance bandwidth and gain of the antenna are found to be considerably improved in the same footprint and without increasing complexity compared to rectangular slot/aperture and also circular aperture. A prototype of the proposed wideband antenna is fabricated by using the additive manufacturing techniques of 3D printing with polylactic acid (PLA) material, which is covered with aluminum tape to validate the design at Ku-band for satellite communication (SatCom). The measured results show that the antenna has an impedance bandwidth of 4 GHz (10.86–14.86 GHz for |S11| < —15 dB), which gives a fractional bandwidth (FBW) of 31.1%. With low cross-polarization being less than — 25 dB at broadside, the antenna has a peak gain of 9 dBi. The proposed antenna is also compact, with a total volume of about 1.1λ0³ at the center frequency.

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来源期刊

Radio Science 工程技术-地球化学与地球物理

CiteScore

3.30

自引率

12.50%

发文量

112

审稿时长

1 months

期刊介绍： Radio Science (RDS) publishes original scientific contributions on radio-frequency electromagnetic-propagation and its applications. Contributions covering measurement, modelling, prediction and forecasting techniques pertinent to fields and waves - including antennas, signals and systems, the terrestrial and space environment and radio propagation problems in radio astronomy - are welcome. Contributions may address propagation through, interaction with, and remote sensing of structures, geophysical media, plasmas, and materials, as well as the application of radio frequency electromagnetic techniques to remote sensing of the Earth and other bodies in the solar system.