| CPC H01P 5/16 (2013.01) [H03F 3/20 (2013.01)] | 22 Claims |
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1. A quadrature coupler comprising:
first, second, third, and fourth ports;
first, second, third, and fourth inductors; and
first, second, third, fourth, fifth, and sixth capacitors, wherein
the first, second, and third capacitors are coupled in series between the first port and the fourth port, with a first intermediate node between the first and second capacitors, and with a second intermediate node between the second and third capacitors,
the fourth, fifth, and sixth capacitors are coupled in series between the second port and the third port, with a third intermediate node between the fourth and fifth capacitors, and with a fourth intermediate node between the fifth and sixth capacitors,
the first inductor is coupled between the first port and the second port,
the second inductor is coupled between the first intermediate node and the third intermediate node,
the third inductor is coupled between the second intermediate node and the fourth intermediate node, and
the fourth inductor is coupled between the fourth port and the third port.
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