US 2013/0093530 A1Published application

Marchand balun circuit

AssigneeHon Hai Precision Industry Co., Ltd.

InventorsEN-SHUO CHANG, PO-CHUAN HSIEH, YING-TSO LAI

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Abstract

A Marchand balun circuit includes a Marchand balun, an unbalanced matching circuit, and a balanced matching circuit. The Marchand balun includes an unbalanced terminal, and two balanced terminals. The unbalanced matching circuit includes a first and the second impedances which are connected between the unbalanced terminal and ground in series, and a first resistor which is connected between ground and a connection node of the first and the second impedances. The balanced matching circuit includes a third and a fourth impedances which are connected between one balanced terminal and ground in series, a fifth and a sixth impedance which are connected between the other balanced terminal and ground in series, a second resistor which is connected between ground and a connection node of the third and the fourth impedances, and a third resistor which is connected between ground and a connection node of the fifth and the sixth impedances.

Claims7

Dependent claims

A Marchand balun circuit comprising:

a Marchand balun comprising an unbalanced terminal and two balanced terminals;
and
a matching circuit comprising:
an unbalanced matching circuit comprising a first resistor, a first impedance, and a second impedance, wherein, the first impedance and the second impedance are connected between the unbalanced terminal and ground in series, the first resistor is connected between the ground and a first connection node of the first impedance and the second impedance;
and
a balanced matching circuit comprising a second resistor, a third resistor, a third impedance, a fourth impedance, a fifth impedance, and a sixth impedance, wherein, the third impedance and the fourth impedance are connected between one balanced terminal and the ground in series, the fifth impedance and the sixth impedance are connected between the other balanced terminal and the ground in series, the second resistor is connected between the ground and a second connection node of the third impedance and the fourth impedance, the third resistor is connected between the ground and a third connection node of the fifth impedance and the sixth impedance.

3 more elements

Dependencies are inferred from the claim text.