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Array of stacked leaky-wave antennas in groove gap waveguide technology
Nafsika Memeletzoglou1, Eva Rajo-Iglesias2
1Department of Signal Theory and Communications, University Carlos III, Madrid, 28911, Spain. nausika@tsc.uc3m.es.
Scientific Reports
|January 27, 2021
Summary
This study presents a novel stacked leaky-wave antenna array using groove gap waveguide technology. The design enhances directivity by 5 dB, achieving a focused pencil beam at 28 GHz.
Area of Science:
- Electromagnetics and Wave Propagation
- Antenna Theory and Design
- Microwave Engineering
Background:
- Leaky-wave antennas (LWAs) are crucial for directional wave transmission.
- Groove gap waveguide (GGW) technology offers advantages in high-frequency applications.
- Existing LWA designs may face limitations in directivity and beam focusing.
Purpose of the Study:
- To design and demonstrate a stacked array of LWAs utilizing GGW technology.
- To investigate the impact of inter-element distance on grating lobes and directivity.
- To achieve enhanced directivity and a pencil beam radiation pattern at 28 GHz.
Main Methods:
- A novel array configuration by stacking individual LWAs vertically.
- Uniform amplitude and phase feeding network with vertical coupling.
- Optimization of inter-element distance to suppress grating lobes.
- Phase correction at each element for maximum directivity.
Main Results:
- A stacked LWA array design achieving a pencil beam radiation pattern.
- Demonstrated directivity enhancement of +5 dB (24.5 dBi) compared to a single LWA (19.6 dBi).
- Successful suppression of grating lobes through optimized element spacing.
Conclusions:
- The proposed stacked LWA array in GGW technology effectively enhances directivity.
- Vertical stacking provides a viable method for achieving focused pencil beams.
- The design shows significant potential for high-performance microwave and millimeter-wave applications.
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