Radial line slot antenna design for monopulse Space Debris Radar

Abstract

Abstract-This paper shows the design of a radial line slot antenna for Space Debris Radar Applications. The monopulse antenna has two beams, sum and difference, and requires an amplitude and phase receiver for detection of the azimuth and elevation direction of arrival. The antenna is circular polarized, and this paper focus on the design of the receiver antenna. The paper shows the optimization process of the position and length of slots in the central frequency of 94 GHz and a first analysis of the feeding network. This design will be tested with the fabrication of a prototype Index Terms-radial line slot antenna, monopulse, antenna synthesis, radar, space debris.

Radial Line Slot Antenna Design With Groove Gap Waveguide Feed for Monopulse Radar Systems

“…However, this paper introduces an optimization algorithm to design the radiating structure and a new feeding structure more compact and almost lossless to get the excitation of both antenna patterns. The fundamentals of the antenna optimization were presented in [17] whereas in [18], the preliminary design of the feeding network was introduced. This work proposes a new way to excite an RLSA antenna to achieve the mentioned Σ and ∆ simultaneous patterns for monopulse operation by using a rectangular cavity excited by two coaxial probes (Σ and ∆ channels) coupled to the radial line through a circular slot in the cavity lid that conforms a short section of coaxial waveguide when combined with the central probe, Σ.…”