US 9,812,777 B2
Load balancing of dual-polarized antennas
Martin Johansson, Molndal (SE); Sven Petersson, Savedalen (SE); and Bo Goransson, Sollentuna (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed by TELEFONAKTIEBOLAGET L M ERICSSON (PUBL), Stockholm (SE)
Filed on Dec. 20, 2013, as Appl. No. 14/137,953.
Claims priority of application No. PCT/EP2013/077537 (WO), filed on Dec. 19, 2013.
Prior Publication US 2015/0180121 A1, Jun. 25, 2015
Int. Cl. H01Q 3/24 (2006.01); H01Q 25/04 (2006.01); H01Q 1/24 (2006.01); H01Q 21/24 (2006.01); H01Q 21/28 (2006.01); H04B 7/06 (2006.01)
CPC H01Q 3/24 (2013.01) [H01Q 1/246 (2013.01); H01Q 21/24 (2013.01); H01Q 21/28 (2013.01); H01Q 25/04 (2013.01); H04B 7/0617 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for load balancing of a dual-polarized N/2-column antenna arrangement, the method being performed by a coupler module, comprising the steps of:
receiving a first plurality of signals from a first set of N/2 power amplifiers of an N-channel radio;
receiving a second plurality of signals from a second set of N/2 power amplifiers of the N-channel radio;
directing a first summation of energy of the first plurality of signals to a first single output port of the coupler module connected to a first polarization of a first column of the dual-polarized N/2-column antenna arrangement;
directing a second summation of energy of the second plurality of signals to a second single output port of the coupler module connected to a second polarization of a second column of the dual-polarized N/2-column antenna arrangement;
directing a first zero energy of the first plurality of signals to at least a third single output port of the coupler module, wherein the first zero energy comprises leakage energy from the first plurality of signals, said leakage energy from the first plurality of signals substantially equal to zero; and
directing a second zero energy of the second plurality of signals to at least a fourth single output port of the coupler module, wherein the second zero energy comprises leakage energy from the second plurality of signals, said leakage energy from the second plurality of signals substantially equal to zero.