A W-band Choke-Ring Encircled Focal Plane Array of Full-Metal Elements for Deep Reflector Antennas with over 50%-Efficiency High Cross-Over Beams

Citation Author(s):
Viktor
Chernikov
Chalmers University of Technology
Artem
Vilenskiy
Chalmers University of Technology
Sam
Agneessens
Ericsson AB, Radio Access Technologies
Lars
Manholm
Ericsson AB, Radio Access Technologies
Marianna
Ivashina
Ericsson AB, Radio Access Technologies
Submitted by:
Viktor Chernikov
Last updated:
Wed, 05/15/2024 - 07:13
DOI:
10.21227/21ec-9n14
Data Format:
License:
0
0 ratings - Please login to submit your rating.

Abstract 

The presented DataSet is dedicated to a W-band (92-96 GHz) focal plane array (FPA) for 50 dBi-reflector antennas intended for the next-generation point-to-point communication links with antenna mast sway compensation. The FPA comprises seven metal waveguide elements arranged in a hexagonal lattice, ensuring the cross-over level of the corresponding reflector beams above -6 dB. The primary challenge of this design is to realize efficient illumination of the reflector for the on-axis and off-axis beams, while keeping a minimum beamforming complexity (i.e., one element per beam) and overcoming array implementation challenges associated with high frequencies. This is accomplished by (i) a high decoupling level of the FPA elements (<-24 dB) and shaping their individual element patterns via a dedicated aperture pin structure between them; and (ii) encircling the FPA aperture with a periodically perforated choke ring pair to further improve the illumination by off-set elements. The FPA performance, evaluated on an offset parabolic reflector with F/D=0.35, exhibits 52-68% efficiency, close beam overlap, and good impedance matching. Measurements of the FPA prototype support predicted results for all characteristics; the latter are competitive with state-of-the-art solutions.

Instructions: 

The DataSet is presented as STEP files, which could be opened in most of the CAD softwares, Ansys HFSS, or CST. The DataSet consist of the three FPA layers and its assembly.

Funding Agency: 
VINNOVA
Grant Number: 
ENERGETIC 2021-01337