Patent ID: 8013686

Claim:
A miniaturized multilayer hybrid-phase signal splitter circuit with an input/output having a first port, a second port, a third port, and a fourth port, wherein when the first port receives a first input signal, a pair of opposite-phase output signals are outputted respectively at the second port and the third port; whereas when the fourth port receives a second input signal, a pair of in-phase output signals are outputted respectively at the second port and the third port; the miniaturized multilayer hybrid-phase signal splitter circuit comprising: a multilayer substrate, which includes at least a first layout plane, a second layout plane, and a third layout plane; a first transmission line, which is laid on the first layout plane of the multilayer substrate and has a first end and a second end, and whose first end is connected to the first port; a second transmission line, which is laid on the first layout plane of the multilayer substrate and has a first end and a second end, and whose first end is connected to the second end of the second transmission line; a third transmission line, which is laid on the second layout plane of the multilayer substrate and has a first end and a second end, and whose first end is connected to a grounding point and whose second end is connected to the second port; a fourth transmission line, which is laid on the second layout plane of the multilayer substrate and has a first end and a second end, and whose first end is connected to the third port and whose second end is connected to a grounding point; a fifth transmission line, which is laid on the third layout plane of the multilayer substrate and has a first end and a second end, and whose first end is connected to the fourth port and whose second end is connected to a grounding point; and a sixth transmission line, which is laid on the third layout plane of the multilayer substrate and has a first end and a second end, and whose first end is connected to a grounding point and whose second end is connected to the fourth port.