A compact uniform circular array antenna for circularly polarized higher-order OAM beam generation through modes superposition.
Keywords
A compact uniform circular array antenna design is presented and validated to generate a resultant sixth-order OAM beam via superposition of fifth-order OAM from ring patch elements and first-order OAM from the array. The antenna operates at 3.55 GHz, achieve…
Study snapshot
Abstract
This paper presents the design and validation of a compact uniform circular array (UCA) antenna for the generation of a higher-order orbital angular momentum (OAM) beam. The array combines the fifth-order OAM generated by individual ring patch antenna elements with the first-order OAM mode of the array to radiate the resultant sixth-order OAM beam through mode superposition. A dual-feed configuration is employed to achieve a 90-degree phase difference using differential feed lengths. Sequential rotation of elements ensures circular polarization without the need for complex feeding networks. Characteristic Mode Analysis (CMA) confirms the excitation of TM61 degenerate modes from ring patch antenna responsible for the fifth-order OAM radiation. The antenna operates at 3.55 GHz and achieves significant mode purity with an axial ratio below 3 dB. The proposed design is a single-layer, low-profile antenna that is suitable for narrowband OAM-based wireless sensor and communication systems, enabling high-order mode generation with a reduced number of array elements.
AI evidence extraction
Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.
Main findings
A compact uniform circular array antenna design is presented and validated to generate a resultant sixth-order OAM beam via superposition of fifth-order OAM from ring patch elements and first-order OAM from the array. The antenna operates at 3.55 GHz, achieves an axial ratio below 3 dB, and CMA indicates excitation of TM61 degenerate modes associated with fifth-order OAM radiation.
Outcomes measured
- Antenna design for higher-order OAM beam generation
- Circular polarization performance (axial ratio < 3 dB)
- Mode purity (significant mode purity reported)
- Excitation of TM61 degenerate modes (CMA confirmation)
- Operation at 3.55 GHz
View raw extracted JSON
{
"study_type": "engineering",
"exposure": {
"band": "RF",
"source": null,
"frequency_mhz": 3550,
"sar_wkg": null,
"duration": null
},
"population": null,
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"outcomes": [
"Antenna design for higher-order OAM beam generation",
"Circular polarization performance (axial ratio < 3 dB)",
"Mode purity (significant mode purity reported)",
"Excitation of TM61 degenerate modes (CMA confirmation)",
"Operation at 3.55 GHz"
],
"main_findings": "A compact uniform circular array antenna design is presented and validated to generate a resultant sixth-order OAM beam via superposition of fifth-order OAM from ring patch elements and first-order OAM from the array. The antenna operates at 3.55 GHz, achieves an axial ratio below 3 dB, and CMA indicates excitation of TM61 degenerate modes associated with fifth-order OAM radiation.",
"effect_direction": "unclear",
"limitations": [],
"evidence_strength": "insufficient",
"confidence": 0.74,
"peer_reviewed_likely": "yes",
"keywords": [
"uniform circular array",
"UCA",
"orbital angular momentum",
"OAM",
"circular polarization",
"ring patch antenna",
"Characteristic Mode Analysis",
"CMA",
"TM61",
"3.55 GHz",
"mode superposition",
"axial ratio",
"wireless sensor",
"communication systems"
],
"suggested_hubs": []
}AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.
Identifiers and source
DOI: 10.1371/journal.pone.0337197
PubMed: 41616022