Summary
International Symposium on Antennas and Propagation
2015
Session Number:S3.1
Session:
Number:S3.1.6
Design of a Cavity-backed Slot Array Unit Cell on Inverted Microstrip Gap Waveguide
Jinlin Liu, Abbas Vosoogh, Ashraf Uz Zaman, Per-Simon Kildal,
pp.-
Publication Date:2015/11/9
Online ISSN:2188-5079
Summary:
Inverted microstrip gap waveguide is advantageous for millimeter wave application because of its low-loss, self-packaging characteristics and cost-effectiveness. In this work a planar gap waveguide slot array is presented. It is fed by a corporate distribution network realized in inverted microstrip gap waveguide. The structure consists of three layers. The top layer contains subarrays of 2 × 2 radiating slots. This is backed by an air-filled groove gap waveguide cavity. This cavity layer is fed by the inverted microstrip gap waveguide distribution network formed in the air-gap between the middle and bottom layer. The paper presents a design of the 2 × 2 subarray, i.e. the unit cell using simulations in an infinite array environment. The simulation results show that the S11 is below -11 dB over 57-66 GHz frequency band covering 14% bandwidth, and the simulated directivity is about 39 dBi when evaluated for a 32 × 32 element slot array antenna.