A Circularly Polarized Microstrip Antenna with Dual Circular Polarization Using a 90° Hybrid Coupler and Proximity-Coupled Feeding for LTE 43 5G Applications
This paper presents a circularly polarized (CP) microstrip antenna with dual circular polarization that is fed using a 3 dB 90° hybrid coupler to ensure dual-CP radiation. The proximity-coupled structure is used as a feeding technique to obtain a larger operational bandwidth that covers the standard...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
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| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/14/24/11877 |
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| Summary: | This paper presents a circularly polarized (CP) microstrip antenna with dual circular polarization that is fed using a 3 dB 90° hybrid coupler to ensure dual-CP radiation. The proximity-coupled structure is used as a feeding technique to obtain a larger operational bandwidth that covers the standard LTE 43 of the 5G mid-band applications (3.6–3.8 GHz). The antenna was fabricated on an FR4 dielectric substrate with overall dimensions of 66.1 × 35 × 1.6 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msup><mrow><mi mathvariant="normal">m</mi><mi mathvariant="normal">m</mi></mrow><mrow><mn>3</mn></mrow></msup></mrow></semantics></math></inline-formula>. A circular patch was formed as a radiating element, with four identical slits that were etched on the patch to guarantee the presence of CP radiation at the required mid-band of the 5G frequency range. The measured impedance bandwidth (BW) of this antenna was 10.6% (3.46–3.85 GHz), while the 3 dB axial ratio bandwidth (ARBW) was 8.2% along the range (3.50–3.80 GHz). The measured average gain was about 1.3 dBi along the antenna impedance bandwidth. |
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| ISSN: | 2076-3417 |