Cryogenic Single Directional Couplers

Features:

Broadband
Low Insertion Loss

Applications:

Amplifiers
Transmitter
Laboratory Test
Radar

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Cryogenic single directional couplers

Cryogenic single directional coupler is a microwave device specifically designed for low-temperatureenvironments (such as liquid helium temperature, 4K or lower), mainly used for directional coupling and isolation of signals in low-temperature systems. It is an indispensable component in fields such as quantum computing, superconducting electronics, and radio astronomy.

Features:

1. Low temperature performance: In extremely low temperature environments (such as 4K or lower), device materials and structures need to have good thermal stability and low thermal loss. Typically, superconducting materials such as niobium or low-temperature compatible materials such as specific ceramics and composite materials are used for manufacturing.
2. High directionality: Single directional couplers have high directionality and can couple input signals from one port to another while minimizing leakage of reverse signals.
3. Low insertion loss: In low-temperature environments, the insertion loss of the device is extremely low, ensuring maximum signal transmission efficiency.
4. High isolation: Isolation is a key indicator in directional couplers. Low temperature single directional couplers typically have higher isolation at low temperatures, effectively preventing signal reflectionand interference.
5. Broadband performance: Many low-temperature single directional couplers are designed for wideband operation to meet the needs of different application scenarios.
6. Compact design: Due to the limited space of low-temperature systems, low-temperature singledirectional couplers are typically designed to be very compact, making them easy to integrate intolow-temperature thermostats or dilution refrigerators.

Applications:

1. Quantum computing: In superconducting quantum computers, low-temperature single directional couplers are used for the transmission and isolation of microwave signals, ensuring the control of quantum bits and the accuracy of signal reading. For example, a low-temperature microwave link used to connect quantum processors and roomtemperature electronic systems.
2. Radio Astronomy: In the low-temperature receiver of a radio telescope, a single directional coupler is used for signal coupling and isolation to improve the sensitivity and signal-to-noise ratio of thereceiver.
3. Superconducting Electronics: In superconducting electronic systems, low-temperature singledirectional couplers are used for the distribution and isolation of microwave signals, ensuring thestability and performance of the system.
4. Low temperature measurement system: In low-temperature experimental platforms, singledirectional couplers are used for coupling and measuring microwave signals, such as in the testing of superconducting resonators or quantum devices.
5. Space communication: In deep space exploration missions, low-temperature single directional couplers can be used in low-temperature receivers to improve the sensitivity and efficiency of signal reception.

Qualwave supplies broadband cryogenic single directional couplers in a wide range from 4GHz to 8GHz. The couplers are widely used in many applications.