Electromagnetics, Antennas and Microwaves
Monopulse Wideband Waveguide Based Travelling Wave Antenna Array
A novel, travelling-wave, waveguide-based antenna array structure with dual-plane monopulse capability is developed. It is an end-fed, broad wall longitudinal slotted, ridged waveguide-based printed antenna array. Even if the structure is scalable, it is designed to operate in S-band. The structure consists of printed antennas on two interleaved waveguide arrays whose dimensions are shrinked to make interleaving operation possible to keep inter-element spacings the same in both the azimuth and elevation cuts. The inherently wideband printed antennas are excited via probes inserted into the waveguides to generate proper sum and di erence patterns. These are expected to eliminate the narrow frequency characteristics of slots on the waveguides, and to improve the bandwidth. Besides, the modelling of the array is performed by a code implementation, which chooses the preoptimized array elements with proper radiation control parameters, and cascades their scattering parameters, in MATLAB. A method to improve radiation patterns is also presented.
Prof. Dr. Özlem Aydın Çivi