Modified Binomial Power Distribution Beamformer for Switched-Beam Circular Array
Journal
14th European Conference on Antennas and Propagation, EuCAP 2020
Date Issued
2020
Author(s)
Abstract
In this paper, we proposed a modified binomial power distribution circular beamforming network (BFN) with a single input port at the center and 12 antenna ports uniformly located along the outer rim of the BFN for full 360° azimuth coverage switched-beam circular antenna array. By combining and interleaving three modified binomial power distribution circuits (PDCs) with three two-way power combining circuits, a compact full horizontal plane coverage beam-switching beamformer is formed. While six switches are needed in the proposed BFN, a simplified prototype BFN without the switches is fabricated and tested for preliminary verification. Measured results agree well with those simulated. The proposed 1 \times 12 modified binomial power distribution circular beamformer possesses several advantages over conventional circular BFN designs, including compact size, single-layered structure, and a wide bandwidth up to 11.4% centered at 5.6 GHz. ? 2020 EurAAP.
Subjects
Beamforming; Beamforming networks (BFN); Circular antenna arrays; Circular arrays; Layered Structures; Measured results; Power combining; Power distributions; Switched beams; Beam forming networks
SDGs
Type
conference paper