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- Title
Compact low‐profile wideband open‐ended rectangular waveguide antenna with corrected radiation patterns.
- Authors
Sun, Jingwen; Li, Teng; Dou, Wenbin
- Abstract
A compact low‐profile wideband open‐ended rectangular waveguide (RWG) antenna is proposed in the Ka‐band with corrected radiation patterns. The antenna is developed on a piece of metal with the same size as the standard flange of WR‐28 waveguide to facilitate the integration. To improve the impedance matching, waveguide steps are introduced at the open end of RWG. Three grooves are then presented on the top of antenna to suppress the surface waves. Finally, the grooves are modified at the corner to reduce the difference of radiation patterns in the E‐plane and H‐plane. To verify the proposed antenna, a prototype is fabricated and measured. The impedance bandwidth of 27.3–35.6 GHz (in a fraction of 26.3%) with S11<−20dB is realized. The corresponding gain over the operating band ranges from 9.1 to 10.2 dBi. Similar radiation patterns are measured in the E‐plane and H‐plane. This antenna is quite promising as a feeding source for the applications of reflectarray, reflector, transmitarray, and lens.
- Subjects
ANTENNA radiation patterns; WAVEGUIDE antennas; SURFACE wave antennas; SUBSTRATE integrated waveguides; IMPEDANCE matching; SLOT antennas
- Publication
International Journal of RF & Microwave Computer-Aided Engineering, 2022, Vol 32, Issue 9, p1
- ISSN
1096-4290
- Publication type
Article
- DOI
10.1002/mmce.23285