An orthomode transducer including a first Boifot junction and a second Boifot junction. Each of the first and second Boifot junctions includes a dual polarized port, a first lateral port, a second lateral port, the first and second lateral port being single polarized, and a third single polarized port along the propagation direction of a signal in the dual polarized port. A first power divider for coupling the first lateral port of the first Boifot junction with the first lateral port of the second Boifot junction to a third port. A second power divider for coupling the second lateral port of the first Boifot junction with the second lateral port of the second Boifot junction to a third port. A third power divider for coupling the third port of the first power divider with the third port of the second power divider to a fourth single polarization port.

A base station antenna, including power dividers, network calibration modules, and connectors. The base station antenna includes at least two phase shifters. At least one phase shifter is integrated with a combiner, the connectors are connected to the network calibration modules, and the network calibration modules are connected to the phase shifters. The one phase shifter integrated with the combiner is connected to the power divider, and at least one output port of the at least one other phase shifter is connected to the phase shifter integrated with the combiner. The base station antenna has an integrated design of phase shifters and combiners.

A base station antenna, including power dividers, network calibration modules, and connectors. The base station antenna includes at least two phase shifters. At least one phase shifter is integrated with a combiner, the connectors are connected to the network calibration modules, and the network calibration modules are connected to the phase shifters. The one phase shifter integrated with the combiner is connected to the power divider, and at least one output port of the at least one other phase shifter is connected to the phase shifter integrated with the combiner. The base station antenna has an integrated design of phase shifters and combiners.

A combiner/splitter is disclosed having a first trifilar transformer having a first outer transmission element electrically connected between a first port node and a first intermediate node. A second trifilar transformer has a second outer transmission element electrically connected between the first intermediate node and a second port node. A third trifilar transformer has a third outer transmission element electrically connected between the first port node and a second intermediate node. A fourth trifilar transformer has a fourth outer transmission element electrically connected between the second intermediate node and a third port node.

A combiner/splitter is disclosed having a first trifilar transformer having a first outer transmission element electrically connected between a first port node and a first intermediate node. A second trifilar transformer has a second outer transmission element electrically connected between the first intermediate node and a second port node. A third trifilar transformer has a third outer transmission element electrically connected between the first port node and a second intermediate node. A fourth trifilar transformer has a fourth outer transmission element electrically connected between the second intermediate node and a third port node.

A Wilkinson power combiner (202) is described that includes a high-pass, HP, frequency circuit (500, 550), wherein the HP frequency circuit (500, 550) comprises at least one of: (i) one input port (510) coupled to at least two output ports (512, 514) via at least two paths; and an input shunt inductor (520) coupling the input port (510) to ground; wherein the one input port (510) is coupled to the at least two output ports (512, 514) via respective series capacitances (230, 238) on the at least two paths, which in cooperation with the input shunt inductor (520) forms a first HP frequency circuit; and (ii) at least one resistor (554, 528)-inductor (552, 524), R-L isolation circuit (500, 550) configured to couple the at least two output ports (512, 514) that forms a second HP frequency circuit.

A Wilkinson power combiner (202) is described that includes a high-pass, HP, frequency circuit (500, 550), wherein the HP frequency circuit (500, 550) comprises at least one of: (i) one input port (510) coupled to at least two output ports (512, 514) via at least two paths; and an input shunt inductor (520) coupling the input port (510) to ground; wherein the one input port (510) is coupled to the at least two output ports (512, 514) via respective series capacitances (230, 238) on the at least two paths, which in cooperation with the input shunt inductor (520) forms a first HP frequency circuit; and (ii) at least one resistor (554, 528)-inductor (552, 524), R-L isolation circuit (500, 550) configured to couple the at least two output ports (512, 514) that forms a second HP frequency circuit.

A power divider includes an input capacitor, and first and second transmission lines (TLs). The first TL includes an input portion (IP), a transmission portion (TP) and an output portion (OP). The second TL includes a TP and an OP. The IP is for receiving an input signal, and is connected to the TPs of the first and second TLs. For each of the first and second TLs, the TP has a length that is one-twelfth of a target wavelength, and is connected to the OP. The OPs of the first and second TLs are for cooperatively outputting a pair of output signals which are in-phase and each of which has a frequency equal to that of the input signal. The input capacitor is connected between ground and the IP.

A power divider includes an input capacitor, and first and second transmission lines (TLs). The first TL includes an input portion (IP), a transmission portion (TP) and an output portion (OP). The second TL includes a TP and an OP. The IP is for receiving an input signal, and is connected to the TPs of the first and second TLs. For each of the first and second TLs, the TP has a length that is one-twelfth of a target wavelength, and is connected to the OP. The OPs of the first and second TLs are for cooperatively outputting a pair of output signals which are in-phase and each of which has a frequency equal to that of the input signal. The input capacitor is connected between ground and the IP.

A reconfigurable quadrature coupler is disclosed. The reconfigurable quadrature coupler includes an input port transmission line connected to a first port, a coupled port transmission line and a coupled port transformer connected between the coupled port transmission line and a second port. The coupled port transformer is configured to have a selectable second port reflection coefficient. The reconfigurable quadrature coupler further includes an isolation port transmission line and an isolation port transformer connected between the isolation transmission line and a third port. The isolation port transformer is configured to have a selectable third port reflection coefficient. Also included is a through port transmission line and a through port transformer connected between the through port transmission line and a fourth port. The through port transformer is configured to have a selectable fourth port reflection coefficient.