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US 12,633,636 B2Granted
High frequency heterodyne mixer
AssigneeThruvision Limited
InventorsChristopher Mark Mann, Stephen Paul Marsh
Life of this patent
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Abstract
Devices and methods for a detection system and heterodyne mixer having a local oscillator (LO) input, a radio frequency (RF) input, an intermediate frequency (IF) output, and a suspended waveguide structure that has a quartz substrate and patterned metal transmission line with a plurality of suppression slots.
Claims23
A heterodyne mixer apparatus, comprising:
- a first input;
- a second input;
- an output;
- a suspended signal transmission element comprising a plurality of suppression slots and at least one filter element;
- and
- a diode circuit mounted on the suspended signal transmission element,
- wherein the suspended signal transmission element further comprises:
- a substrate having a first and second surface;
- and
- a transmission line on the first surface, wherein the transmission line is a patterned metal microstrip transmission line comprising one or more of the suppression slots and filter elements.
7 more elements
A detector apparatus, comprising:
- one or more mixers;
- one or more feedhorns coupled to a radio frequency (RF) input of at least one of the mixers;
- a local oscillator coupled to a local oscillator (LO) input of the at least one mixer;
- an output channel coupled to an intermediate frequency (IF) output of the at least one mixer;
- and
- one or more of a low noise amplifier, power detector, and analog-to-digital converter connected to the output channel and configured to process an output IF signal from the at least one mixer,
- wherein the at least one mixer comprises:
- a suspended signal transmission element comprising a plurality of suppression slots and one or more filter elements;
- and
- a diode circuit mounted on the suspended signal transmission element,
- wherein the detector is a terahertz camera, and
- wherein the one or more mixers comprises a plurality of mixers optimized at 250 GHz and a plurality of mixers optimized at 375 GHz.
9 more elements
A heterodyne mixer apparatus, comprising:
- a first input;
- a second input;
- an output;
- a suspended signal transmission element comprising a plurality of suppression slots and at least one filter element;
- a diode circuit mounted on the suspended signal transmission element;
- and
- a housing having a first mounting shelf, a second mounting shelf, and a cavity,
- wherein the suspended signal transmission element is mounted in the cavity and on the first and second mounting shelves to form an air gap between the suspended element and the housing on at least two sides of the suspended waveguide.
5 more elements
A heterodyne mixer apparatus, comprising:
- a first input;
- a second input;
- an output;
- a suspended signal transmission element comprising a plurality of suppression slots and at least one filter element;
- a diode circuit mounted on the suspended signal transmission element;
- a housing having a cavity;
- a first wire connected to the output;
- and
- a second wire connected to an inductively tuned capacitive pad and a surface of the housing,
- wherein the diode circuit is at least partially mounted to the inductively tuned capacitive pad.
7 more elements
Dependencies are inferred from the claim text.