Quadrature hybrid coupler, amplifier, and wireless communication device
AssigneePanasonic Corporation
InventorToshifumi Nakatani
Life of this patent
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Abstract
A transformer (101) includes four terminals (N1 to N4), and parasitic resistances (109 and 110) are present in the transformer (101). A coupling capacitor (102) is provided between the terminals (N1 and N3), and a coupling capacitor (103) is provided between the terminals (N2 and N4). Shunt capacitors (104 to 107) are respectively provided between the respective terminals (N1 to N4) and a ground. Further, a phase shifter (112) is electrically connected to the terminal (N2), and a phase shifter (113) having a phase delay larger than that of the phase shifter (112) is connected to the terminal (N3).
Claims13
A quadrature hybrid coupler comprising:
- a transformer that includes a first terminal, a second terminal, a third terminal and a fourth terminal;
- a first coupling capacitor that is provided between the first terminal and the third terminal;
- a second coupling capacitor that is provided between the second terminal and the fourth terminal;
- a first shunt capacitor, a second shunt capacitor, a third shunt capacitor and a fourth shunt capacitor that are respectively provided with the first terminal, the second terminal, the third terminal and the fourth terminal;
- a termination resistance that is connected to the fourth terminal;
- a termination capacitor that is connected to the fourth terminal and is connected in parallel with the termination resistance;
- a first phase shifter that is connected to the second terminal;
- and
- a second phase shifter that is connected to the third terminal, wherein
- a phase delay amount of the second phase shifter is larger than a phase delay amount of the first phase shifter.
Dependencies are inferred from the claim text.