3-way balun for planar-type double balanced mixer
AssigneeElectronics and Telecommunications Research Institute
InventorsJin-Cheol Jeong, In-Bok Yom, Dong-Pil Chang, Inkwon Ju
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Abstract
Provided is a 3-way balun for a double balanced mixer. This research provides a 3-way balun available for a planar-type double balanced mixer and a planar-type double balanced mixer employing the same. The 3-way balun includes a first output unit for receiving and outputting an input signal of a predetermined frequency; and second and third output units connected to the first output unit and outputting signals whose phase is different by 180 from a phase of a signal of the first output unit and amplitude is a half of an amplitude of the signal outputted from the first output unit.
Claims8
A 3-way balun, comprising:
- a first output unit for receiving and outputting an input signal of a predetermined frequency;
- and
- second and third output units connected to the first output unit, and outputting signals whose phase is different by 180 from a phase of a signal of the first output unit and amplitude is a half of an amplitude of the signal outputted from the first output unit.
A doubl balanced mixer using a 3-way balun, comprising:
- a first balun for receiving a first frequency signal and outputting two signals having a phase difference of 180 from each other;
- a second balun including second and third output ports for receiving a second frequency signal and outputting signals having the same phase and amplitude as the second frequency signal, and a first output port having an amplitude twice as strong as the signal outputted from the second and third output port and a phase difference of 180 from the signal outputted from the second and third output port;
- first and second coils connected between output ports of the first balun;
- two diodes connected in series from the second output port of the second balun to the first output port of the second balun;
- two diodes connected in series from the first output port of the second balun to the third output port of the second balun,
- wherein one output port of the first balun is connected to a contact point of the diodes serially connected to the first and second output ports of the second balun, and the other output port of the first balun is connected to a contact point of the diodes serially connected to the first and third output ports of the second balun, and
- an output port is connected to the first and second coils.
Dependencies are inferred from the claim text.