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US 12,719,519 B2Granted
Mixer circuit
AssigneeNTT, Inc.
InventorsTeruo Jo, Daisuke Kitayama, Hiroyuki Takahashi, Takeshi Sakamoto
Life of this patent
Estimating the term…
Abstract
The mixer circuit includes a mixer, an LO matching circuit inserted between an LO signal terminal and a first terminal of the mixer, an IF matching circuit inserted between the IF signal terminal and a second terminal of the mixer, and an RF matching circuit inserted between an RF signal terminal and a third terminal of the mixer. In the RF matching circuit, a reflection characteristic is set such that a minimum value of reflection loss appears on a high-frequency side of the frequency of the LO signal.
Claims15
A mixer circuit comprising:
- a mixer configured to receive a local oscillator (LO) signal and one of an intermediate frequency (IF) signal or a radio frequency (RF) signal, and output the RF signal or the IF signal;
- an LO matching circuit between a LO signal terminal and a first terminal of the mixer, the LO matching circuit being configured to match an impedance of the LO signal terminal with an impedance of the first terminal of the mixer viewed from the LO signal terminal;
- an IF matching circuit between an IF signal terminal and a second terminal of the mixer, the IF matching circuit being configured to match an impedance of the IF signal terminal with an impedance of the second terminal of the mixer viewed from the IF signal terminal;
- and
- a RF matching circuit between an RF signal terminal and a third terminal of the mixer, the RF matching circuit being configured to match an impedance of the RF signal terminal with an impedance of the third terminal of the mixer viewed from the RF signal terminal,
- wherein the RF matching circuit has a reflection characteristic set such that a minimum value of a reflection loss appears on a high-frequency side of a frequency of the LO signal.
3 more elements
A mixer circuit comprising:
- a mixer configured to receive a local oscillator (LO) signal and one of an intermediate frequency (IF) signal or a radio frequency (RF) signal, and output the RF signal or the IF signal;
- an LO matching circuit between a LO signal terminal and a first terminal of the mixer, the LO matching circuit being configured to match an impedance of the LO signal terminal with an impedance of the first terminal of the mixer viewed from the LO signal terminal;
- an IF matching circuit between an IF signal terminal and a second terminal of the mixer, the IF matching circuit being configured to match an impedance of the IF signal terminal with an impedance of the second terminal of the mixer viewed from the IF signal terminal;
- and
- a RF matching circuit between an RF signal terminal and a third terminal of the mixer, the RF matching circuit being configured to match an impedance of the RF signal terminal with an impedance of the third terminal of the mixer viewed from the RF signal terminal,
- wherein the IF matching circuit has a reflection characteristic set such that a minimum value of a reflection loss appears on a higher frequency side than direct current (DC).
3 more elements
A mixer circuit comprising:
- a mixer configured to receive a local oscillator (LO) signal and one of an intermediate frequency (IF) signal or a radio frequency (RF) signal, and output the RF signal or the IF signal;
- an LO matching circuit between a LO signal terminal and a first terminal of the mixer, the LO matching circuit being configured to match an impedance of the LO signal terminal with an impedance of the first terminal of the mixer viewed from the LO signal terminal;
- an IF matching circuit between an IF signal terminal and a second terminal of the mixer, the IF matching circuit being configured to match the impedance of the IF signal terminal with the impedance of the second terminal of the mixer viewed from the IF signal terminal;
- and
- a RF matching circuit between an RF signal terminal and a third terminal of the mixer, the RF matching circuit being configured to match the impedance of the RF signal terminal with the impedance of the third terminal of the mixer viewed from the RF signal terminal,
- wherein the RF matching circuit has a reflection characteristic set such that a minimum value of a reflection loss appears on a high-frequency side of a frequency of the LO signal, and the IF matching circuit has a reflection characteristic set such that a minimum value of a reflection loss appears on a higher frequency side than direct current (DC).
3 more elements
Dependencies are inferred from the claim text.