Characteristic mode analysis of a compact circularly polarized rotated square slot antenna

Presented in this paper is a circularly polarized (CP) wide 45° rotated slot antenna with a broad bandwidth. Characteristic mode analysis is initially carried out to show that, by simply rotating a square slot, CP waves can be radiated if it is properly excited. A simple 50 Ω feedline is then design...

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Bibliographic Details
Published in:Microwave and optical technology letters Vol. 65; no. 6; pp. 1762 - 1769
Main Authors: Oteng Gyasi, Kwame, Boukarkar, Abdelheq, Obeng Kwakye, Kingsford Sarkodie, Ellis, Mubarak Sani, Ahmed, Abdul‐Rahman, Kponyo, Jerry John, Basit, Muhammad Abdul, Shoaib, Nosherwan
Format: Journal Article
Language:English
Published: New York Wiley Subscription Services, Inc 01.06.2023
Subjects:
Antenna radiation patterns
Bandwidths
Broadband
broadband antennas
characteristic mode analysis
Circular polarization
circularly polarized antennas
microstrip slot antennas
Slot antennas
ISSN:0895-2477, 1098-2760
Online Access:Get full text
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Summary:Presented in this paper is a circularly polarized (CP) wide 45° rotated slot antenna with a broad bandwidth. Characteristic mode analysis is initially carried out to show that, by simply rotating a square slot, CP waves can be radiated if it is properly excited. A simple 50 Ω feedline is then designed to excite the slot for the generation of broadband CP waves. The antenna has a total volume of 30 × 30 × 1.6 mm3. Measurement results indicate a broad S11 ≤ −10 dB impedance bandwidth of 85.7% (3.2–8 GHz), a broadband 3 dB axial ratio bandwidth of 57.1% (3.5–6.3 GHz) and a peak gain of 3.6 dBi are obtained by the antenna. The proposed antenna possesses stable radiation patterns as well as relatively flat gain over its operational bandwidth in addition to being compact. It can thus be used for wireless technologies such as WiMAX 3.5 and 5.5 GHz, WLAN 5.2 and 5.8 GHz in addition to Industrial, Scientific, and Medical 5.8 GHz.
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ISSN:0895-2477
1098-2760
DOI:10.1002/mop.33616