Terahertz radiation mixer

Details Terahertz radiation mixer Terahertz radiation mixer

2005-04-25

2008-05-20

Phu, Sanh D. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S209000, C455S293000, C455S331000, C455S333000, C257S019000, C257S192000, C257S270000

Reexamination Certificate

active

07376403

ABSTRACT:
A terahertz radiation mixer comprises a heterodyned field-effect transistor (FET) having a high electron mobility heterostructure that provides a gatable two-dimensional electron gas in the channel region of the FET. The mixer can operate in either a broadband pinch-off mode or a narrowband resonant plasmon mode by changing a grating gate bias of the FET. The mixer can beat an RF signal frequency against a local oscillator frequency to generate an intermediate frequency difference signal in the microwave region. The mixer can have a low local oscillator power requirement and a large intermediate frequency bandwidth. The terahertz radiation mixer is particularly useful for terahertz applications requiring high resolution.

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