Design of a High-Performance 35GHz Monopulse Lens Antenna

Abstract

The lens antenna is one of favorable types of antenna at millimeter-wave frequencies since it is structurally simple and of small size. This paper presents a design of a high-performance 35GHz monopulse lens antenna with high aperture efficiency and low sidelobes for missile seeker applications. First, a lens is designed based on the antenna requirements. Next, a monopulse feed is designed utilizing tapered dielectric rods. For ease in the implementation of the monopulse comparator network, a 5-element configuration is adopted where the sum-channel element is separated from difference-channel elements. Finally the monopulse feed and the lens are combined to complete the antenna design. The designed antenna with a 16-wavelength diameter aperture has the sum-channel performance of 32.3dBi gain, 4.24° beamwidth,-28.4dB sidelobe level, and the difference-channel performance of 29.0dBi gain, 2.36° cross-over angle,-23.5dB sidelobe level, and null depth of greater than 40dB.

Design of a Ku-Band Monopulse Antenna with a Truncated Reflector and an Open-Ended Waveguide Feed

“…In [ 6 , 7 , 8 ], the monopulse feed was designed by leveraging a dielectric lens. In [ 9 ], researchers investigated a monopulse reflector antenna operating at 35 GHz for missile applications. In [ 10 ], a parabolic reflector with a compact monopulse feed was developed for earth observation use.…”