Patent ID: 11876303
Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 21:
22. An antenna module, comprising:
an array of circular patch antenna elements for 360° end-fire scanning;
a Butler matrix having one or more submatrices, each of the submatrices including:
two input 90° hybrids each having two outputs and two inputs for selectively receiving signals from a transceiver; and
two output 90° hybrids each having two outputs and two inputs, the two inputs of each output 90° hybrid being coupled to an output of different ones of the input 90° hybrids, each output of the output 90° hybrids being coupled to a different one of the circular patch antenna elements.