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US 7,095,998 B2Granted
Mixer and converter using same
AssigneeMurata Manufacturing Co., Ltd.
InventorsRyo Tatsumi, Mitsuhiro Matsumoto, Tomoya Bando
Life of this patent
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Abstract
A mixer, which is a single balanced mixer, includes an LO port for inputting an LO signal, an RF port for inputting an RF signal, an IF port for outputting an IF signal, a balun for converting an unbalanced signal into a balanced signal, and a pair of mixer diodes connected in series. The mixer further includes a high-pass filter for blocking LO and IF signals and passing an RF signal and a low-pass filter for blocking LO and RF signals and passing an IF signal.
Claims17
A mixer comprising:
- a balun including two balanced lines each having a first end that is short-circuited and a second end that defines a balanced terminal, and an unbalanced line having a first end that is free and a second end that defines an unbalanced terminal;
- a pair of mixer diodes connected to respective ones of the balanced terminals;
- an LO port connected to the unbalanced terminal;
- a high-pass filter;
- an RF port connected to a node between said mixer diodes through said high-pass filter;
- a low-pass filter;
- and
- an IF port connected to the node between said mixer diodes through said low-pass filter;
- wherein said balun, said pair of mixer diodes, said high-pass filter, and said low-pass filter are integrated into a multilayer substrate that includes a plurality of sheet layers stacked on each other;
- and
- the multilayer substrate has first external terminals that respectively define said LO port, said RF port, and said IF port at the side surfaces thereof, and has second external terminals that define a ground, at least one of the second external terminals being arranged between two of the first external terminals.
8 more elements
Dependencies are inferred from the claim text.