Microwave subharmonic mixer device
First Claim
1. A wide band microwave subharmonic mixer comprising:
- signal dividing means, responsive to a local oscillator signal, for dividing said local oscillator into a first signal and a second signal;
signal dividing and combining means for receiving a microwave signal and for outputting an intermediate frequency signal;
first and second balanced frequency converting means, each coupled to said signal dividing and combining means, said first converting means responsive to said first signal, said second converting means responsive to said second signal, said first and second converting means for converting said first and second signals, respectively, and said microwave signal into said intermediate frequency signal, said first and second converting means each comprising a pair of diodes;
a dielectric substrate;
coplanar transmission lines means, disposed on said substrate, for coupling said signal dividing means to said first and second converting means; and
slotted transmission line means, disposed on said substrate, for coupling said first and second converting means to said signal dividing and combining means.
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Accused Products
Abstract
A wide band microwave subharmonic mixer includes a signal divider, first and second balanced varistor frequency converters, and a signal combining and dividing circuit. A local oscillator signal is applied to the signal divider, which divides the local oscillator signal into first and second signals. The first signal is applied to the first frequency converter via a coplanar transmission line, while the second signal is applied to the second frequency converter via another coplanar transmission line. The first and second frequency converters each comprise a pair of diodes. Each pair of diodes may be externally polarized by a dc polarization current. The signal combining and dividing circuit receives a microwave signal, and couples the microwave signal to the first and second frequency converters via slotted transmission lines. The first and second frequency converters produce an intermediate frequency signal which is outputted via the frequency combining and dividing circuit. Flanking ground conductors of the coplanar transmission lines may be short-circuited at a predetermined distance from the pairs of diodes.
129 Citations
9 Claims
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1. A wide band microwave subharmonic mixer comprising:
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signal dividing means, responsive to a local oscillator signal, for dividing said local oscillator into a first signal and a second signal; signal dividing and combining means for receiving a microwave signal and for outputting an intermediate frequency signal; first and second balanced frequency converting means, each coupled to said signal dividing and combining means, said first converting means responsive to said first signal, said second converting means responsive to said second signal, said first and second converting means for converting said first and second signals, respectively, and said microwave signal into said intermediate frequency signal, said first and second converting means each comprising a pair of diodes; a dielectric substrate; coplanar transmission lines means, disposed on said substrate, for coupling said signal dividing means to said first and second converting means; and slotted transmission line means, disposed on said substrate, for coupling said first and second converting means to said signal dividing and combining means.
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2. A wide band microwave subharmonic mixer comprising:
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signal dividing means, adapted to receive a local oscillator signal, for dividing said local oscillator signal into a first signal and a second signal; signal dividing and combining means, adapted to receive a microwave signal and responsive to a first mixed signal and to a second mixed signal, for combining said first and second mixed signals to form an intermediate frequency signal; first mixing means, responsive to said first signal and to said microwave signal, for producing said first mixed signal; second mixing means, responsive to said second signal and to said microwave signal, for producing said second mixed signal; first coplanar transmission line means for coupling said first mixing means to said signal dividing means; second coplanar transmission line means for coupling said second mixing means to said signal dividing means; first slotted transmission line means for coupling said first mixing means to said signal dividing and combining means; and second slotted transmission line means for coupling said second mixing means to said signal dividing and combining means. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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Specification