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Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
Published on: June 7, 2019
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A Novel Metasurface-Based Monopulse Antenna with Improved Sum and Difference Beams Radiation Performance
Jianing Zhao1,2, Li Hao1, Hao Li3,4
1College of Information Science and Engineering, Guilin University of Technology, Guilin 541006, China.
Micromachines
|November 11, 2022
Summary
This study introduces a novel metasurface antenna for improved monopulse tracking. The design enhances both sum and difference beams, offering superior performance for tracking platforms.
Area of Science:
- Electromagnetics
- Antenna Engineering
- Metamaterials
Background:
- Monopulse antennas are critical for target tracking.
- Existing designs face limitations in achieving optimal sum and difference beam performance.
- Metasurfaces offer unique electromagnetic wave manipulation capabilities.
Purpose of the Study:
- To propose and validate a novel metasurface-based monopulse antenna.
- To enhance the sum and difference beam characteristics of monopulse antennas.
- To demonstrate the suitability of the proposed design for tracking applications.
Main Methods:
- Utilized a multimode pyramidal horn as the antenna feed.
- Designed a monopulse comparator using 3-dB couplers and waveguide phase shifters.
- Integrated metasurfaces onto a bowl structure for electromagnetic wave radiation.
Main Results:
- Fabricated and measured an experimental prototype at Ku-band.
- Achieved a gain ratio of 2.8 dB and 3.7 dB between sum and difference beams.
- Attained a peak sum beam gain of 27.1 dB at 16 GHz with 41.4% aperture efficiency.
Conclusions:
- The proposed metasurface-based monopulse antenna significantly improves sum and difference beam performance.
- The design demonstrates high gain and aperture efficiency.
- The antenna is well-suited for advanced tracking platforms.
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