Patent ID: 11867735
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Telecommunications (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method of determining voltage standing wave ratios, VSWR, of an antenna array having multiple subarrays, each subarray having two branches, each of the two branches having different polarizations so that a subarray is dual-polarized, the method comprising:
grouping the branches of the antenna array to form a number of groups, each group being formed so that nearest branches in a group differ in polarization and so that nearest branches in a row of branches in the group are separated by at least one branch not in the group; and
for each group:
combining reflected signals from the branches of the group to produce a first signal YREFL and combining forward signals from the branches of the group to produce a second signal YFWD;
calculating a reflected power PREFL from a product of the first signal YREFL and a matrix X of orthogonal signals corresponding to transmission signals coupled to the branches of the group;
calculating a forward power PFWD from a product of the second signal YFWD and the matrix X; and
calculating a VSWR for the group based on the reflected power PREFL and the forward power PFWD.