Investigation on SIW Slot Antenna Array with Beam Scanning Ability

Author:

Li Yanfei12ORCID,Li Yang1

Affiliation:

1. State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China

2. Information Engineering School, Communication University of China, Beijing 100024, China

Abstract

A sparse substrate integrated waveguide (SIW) slot antenna array and its application on phase scanning are studied in this paper. The genetic algorithm is used to optimize the best arrangement for 8-element and 7-element sparse arrays over an aperture of 4.5λ0. Antenna arrays with feeding networks, for steering the main beam pointing to 0° and −15°, are demonstrated with the SIW technology. The comparison between the sparse array and the conventional uniformly spaced array with the same aperture are presented, which suggest that the same beam width can be obtained with the gain decreased by 0.5 or 1 dBi and the number of element reduced by 2 or 3, respectively. The sparse antenna array with beam scanning ability presented in this paper shows that, while the beam scanning in the range of ±15°, the gain fluctuation is less than 0.3 dBi and the side lobe level is lower than −10 dB.

Funder

National Key Technology Support Program

Publisher

Hindawi Limited

Subject

Electrical and Electronic Engineering

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