Harmonic mixer having two transistors driven complimentarily
First Claim
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1. A harmonic mixer for mixing a local signal LO with an intermediate signal IF to generate an output signal RF that contains frequency components of 2×
- fLO±
fIF, where fLO and fIF are frequencies of the local signal LO and the intermediate signal IF, respectively, the harmonic mixer comprising;
an input transmission line coupled to an input terminal that receives the intermediate signal therein;
an output transmission line coupled to an output terminal that outputs the output signal therefrom;
a first transistor and a second transistor connected in parallel to each other between the input transmission line and the output transmission line, the first transistor and the second transistor being complementarily driven by the local signal; and
a balun that receives the local signal and outputs two signal complementary to each other,wherein the first transistor is driven by one of the two signals, and the second transistor is driven by another of the two signals.
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Abstract
A harmonic mixer that suppresses the degradation of the conversion efficiency is disclosed. That harmonic mixer includes an input transmission line, an output transmission line, and two transistors connected in parallel between the input transmission line and the output transmission line. Two transistors are complementarily driven by a local signal LO and generate an output signal RF with frequencies of 2×fLO±fIF, where fLO and fIF are frequencies of a local signal LO and an intermediate signal IF.
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Citations
11 Claims
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1. A harmonic mixer for mixing a local signal LO with an intermediate signal IF to generate an output signal RF that contains frequency components of 2×
- fLO±
fIF, where fLO and fIF are frequencies of the local signal LO and the intermediate signal IF, respectively, the harmonic mixer comprising;an input transmission line coupled to an input terminal that receives the intermediate signal therein; an output transmission line coupled to an output terminal that outputs the output signal therefrom; a first transistor and a second transistor connected in parallel to each other between the input transmission line and the output transmission line, the first transistor and the second transistor being complementarily driven by the local signal; and a balun that receives the local signal and outputs two signal complementary to each other, wherein the first transistor is driven by one of the two signals, and the second transistor is driven by another of the two signals. - View Dependent Claims (2, 3, 4, 5, 11)
- fLO±
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6. A harmonic mixer for mixing a local signal LO with an intermediate signal IF to generate an output signal RF that contains frequency components of 2×
- fLO±
fIF, where fLO and fIF are frequencies of the local signal and the intermediate signal IF, respectively, the harmonic mixer comprising;an input transmission line coupled to an input terminal that receives the intermediate signal therein; an output transmission line coupled to an output terminal that outputs the output signal therefrom; and a first transistor and second transistor connected in parallel to each other between the input transmission line and the output transmission line, the first transistor and the second transistor being complementarily driven by the local signal; and a first filter connected between the input terminal and the input transmission line, the first filter substantially blocking frequency components of the local signal, wherein the first filter is a low-pass filter including an inductor and two capacitors, the inductor being put between the input transmission line and the input terminal, the capacitors being put between the inductor and a ground, the inductor and the two capacitors forming a π
(pi)-arrangement. - View Dependent Claims (8, 9, 10)
- fLO±
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7. A harmonic mixed for mixing a local signal LO with an intermediate signal IF to generate an output signal RF that contains frequency components of 2×
- fLO±
fIF, where fLO and fIF are frequencies of the local signal and the intermediate signal IF, respectively, the harmonic mixer comprising;an input transmission line coupled to an input terminal that receives the intermediate signal herein; an output transmission line coupled to an output terminal that outputs the output signal therefrom; and a first transistor and second transistor connected in parallel to each other between the input transmission line and the output transmission line, the first transistor and the second transistor being complementarily driven by the local signal; and a first filter connected between the input terminal and the input transmission line, the first filter substantially blocking frequency components of the local signal, wherein the first filter is a low-pass filter including a transmission line and two capacitors, the transmission line being put between the input transmission line and the input terminal, the capacitors being put between the transmission line and a ground, the transmission line and the two capacitors forming a π
(pi)-arrangement, andwherein the transmission line has an electrical length corresponding to a quarter wavelength of the local signal.
- fLO±
Specification