Combiner/splitter
AssigneeQorvo US, Inc.
InventorsTimothy M. Gittemeier, Michael Roberg
Life of this patent
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Abstract
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.
Claims23
A combiner/splitter (10) comprising:
- a first trifilar transformer (12) having a first outer transmission element (14) electrically connected between a first port node (P1) and a first intermediate node (N1);
- a second trifilar transformer (16) having a second outer transmission element (18) electrically connected between the first intermediate node (N1) and a second port node (P2);
- a third trifilar transformer (20) having a third outer transmission element (22) electrically connected between the first port node (P1) and a second intermediate node (N2);
- a fourth trifilar transformer (24) having a fourth outer transmission element (26) electrically connected between the second intermediate node (N2) and a third port node (P3), wherein the second port node P2 and the third port node P3 are different nodes through which different signals from different external sources can be received, and each of the first trifilar transformer (12), the second trifilar transformer (16), the third trifilar transformer (20), and the fourth trifilar transformer (24) is configured to utilize magnetic coupling to perform impedance transformations;
- and
- a resistor (R1) and a capacitor (C1) electrically connected in series between the second port node (P2) and the third port node (P3) to increase isolation between the second port node (P2) and the third port node (P3).
A wireless communication device comprising:
- a plurality of antennas;
- a baseband processor;
- transmit circuitry configured to receive encoded data from the baseband processor and to modulate a carrier signal with the encoded data;
- and
- a combiner/splitter coupled between the plurality of antennas and the transmitter circuitry, the combiner/splitter comprising:
- a first trifilar transformer (12) having a first outer transmission element (14) electrically connected between a first port node (P1) and a first intermediate node (N1);
- a second trifilar transformer (16) having a second outer transmission element (18) electrically connected between the first intermediate node (N1) and a second port node (P2);
- a third trifilar transformer (20) having a third outer transmission element (22) electrically connected between the first port node (P1) and a second intermediate node (N2);
- a fourth trifilar transformer (24) having a fourth outer transmission element (26) electrically connected between the second intermediate node (N2) and a third port node (P3), wherein the second port node P2 and the third port node P3 are different nodes through which different signals from different external sources can be received, and each of the first trifilar transformer (12), the second trifilar transformer (16), the third trifilar transformer (20), and the fourth trifilar transformer (24) is configured to utilize magnetic coupling to perform impedance transformations;
- and
- a resistor (R1) and a capacitor (C1) electrically connected in series between the second port node (P2) and the third port node (P3) to increase isolation between the second port node (P2) and the third port node (P3).
Dependencies are inferred from the claim text.