A Novel Metasurface-Based Monopulse Antenna with Improved Sum and Difference Beams Radiation Performance

A Novel Metasurface-Based Monopulse Antenna with Improved Sum and Difference Beams Radiation Performance

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This paper proposes a novel metasurface-based monopulse antenna.A Latest Product Releases & Innovations – Stay Updated! multimode pyramidal horn with four ports is selected as the feed of the proposed monopulse antenna.The 3-dB couplers and the optimized waveguide phase shifters are employed to design the monopulse comparator.In order to obtain good sum and difference beams performance, metasurfaces are mounted on a bowl structure to radiate the electromagnetic wave from the sub-reflector.An experimental prototype of the proposed design has been fabricated and measured at Ku-band.

The measured results show that the gain ratio between the sum and difference beams is 2.8 dB and 3.7 6-0 igora vibrance dB, respectively.More importantly, the peak gain of the sum beam at 16 GHz is 27.1 dB, without considering the loss of the comparator, with a corresponding aperture efficiency of about 41.

4%.This indicates that the proposed structure is beneficial for improving the sum and difference beams performance of the monopulse antenna, which is suitable for tracking platforms.