UWB circularly polarised slot antenna with modified ground plane and L-shaped radiator

Rui Xu; Jianying Li; Jie Liu; Shi Gang Zhou; Kun Wei

UWB circularly polarised slot antenna with modified ground plane and L-shaped radiator

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Author(s): Rui Xu¹ ; Jianying Li¹ ; Jie Liu¹ ; Shi Gang Zhou¹ ; Kun Wei¹
- Affiliations: 1: Department of Electromagnetic Field and Microwave Technology , Northwest Polytechnical University , People's Republic of China
Source: Volume 54, Issue 15, 26 July 2018, p. 918 – 920
DOI: 10.1049/el.2018.1346 , Print ISSN 0013-5194, Online ISSN 1350-911X

Received 18/04/2018, Published 14/06/2018

An UWB circularly polarised (CP) slot antenna with simple structure is presented in this Letter. By etching a simple C-shaped slot on the planar ground, adopting an L-shaped strip as a radiator, and employing an off-centre-fed structure, the proposed CP antenna can easily be realised with both wideband impedance bandwidth (IBW) and 3 dB axial-ratio bandwidth (ARBW). The impedance and ARBWs of this antenna can be further expanded by adding a matching stub and cutting an L-shaped slit on the lower ground. This antenna can realise a wideband IBW (S ₁₁ < −10 dB) of about 3.62 GHz (124.4%, 1.10–4.72 GHz) and 3 dB ARBW of about 3.6 GHz (115.2%, 1.26–4.68 GHz).

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UWB circularly polarised slot antenna with modified ground plane and L-shaped radiator

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