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A high-gain gap waveguide-based 16 × 16 slot antenna array with low sidelobe level for mmwave applications
Davood Zarifi1,2, Ali Sabbaghi Saber3, Ashraf Uz Zaman4
1School of Electrical and Computer Engineering, University of Kashan, Kashan, Iran. davood.zarifi@pg.edu.pl.
Scientific Reports
|December 29, 2024
Summary
This study introduces a high-gain Ka-band antenna array using ridge gap waveguide technology for efficient feeding. The design achieves low sidelobe levels, making it suitable for advanced communication systems.
Area of Science:
- Electrical Engineering
- Electromagnetics and Antennas
Background:
- Ka-band frequencies are crucial for high-bandwidth communication systems.
- Efficient antenna arrays with low sidelobe levels are needed for applications like vehicular radar and 5G.
Purpose of the Study:
- To design and validate a high-gain 16x16 slot antenna array for Ka-band applications.
- To achieve a low sidelobe level (SLL) and wide impedance bandwidth using novel feeding network technology.
Main Methods:
- A 16x16 array of cavity-backed slot antennas was designed.
- A tapered ridge gap waveguide feeding network was employed for unequal element feeding and reduced loss.
- A transition to a standard rectangular waveguide (WR-28) was implemented.
Main Results:
- The antenna array achieved a maximum gain of 28.9 dBi.
- An impedance bandwidth exceeding 17% was measured across the 27.5-32.6 GHz range.
- Sidelobe levels below -20 dB were recorded.
Conclusions:
- The proposed antenna array demonstrates high performance with significant gain and low SLL.
- The design is suitable for vehicular radar systems and high data rate millimeter-wave communications.
- Ridge gap waveguide technology effectively reduces feeding network losses.
