Wideband Circularly Polarized mm-Wave Array Antenna Using H-Shaped Low-Axial-Ratio Apertures
[EN] An H-shaped all-metal radiating element comprising an active and a coupled slot has been proposed to design wideband high-efficiency circularly polarized antenna arrays. The proper excitation of several modes on the coupled slot enables a wide axial ratio (AR) bandwidth with high circular polar...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/205651 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/205651 |
| Access Level: | acceso abierto |
| Palabra clave: | Antenna arrays Circular polarization Gap waveguide Satellite communications Slotted waveguide arrays TEORÍA DE LA SEÑAL Y COMUNICACIONES |
| Sumario: | [EN] An H-shaped all-metal radiating element comprising an active and a coupled slot has been proposed to design wideband high-efficiency circularly polarized antenna arrays. The proper excitation of several modes on the coupled slot enables a wide axial ratio (AR) bandwidth with high circular polarization (CP) purity. To feed an array of such radiating elements, a simple and scalable two-layer corporate network, implemented in groove gap waveguide (GGW) technology, is conceived. Those good frequency properties have been confirmed by the fabrication of a prototype, whose experimental results report a 1-dB AR bandwidth of 22%. In addition, a peak radiation efficiency of 97% with good pattern stability and an impedance bandwidth of 21% with high return loss have been measured. The high CP purity demonstrated by these wideband apertures makes them particularly suitable for Ka-band satellite communications' antennas. |
|---|