Cryogenic Filters RF Coaxial High Frequency Microwave Millimeter Wave Radio

Cryogenic Filters RF Coaxial High Frequency Microwave Millimeter Wave Radio

Features:

High Stopband Rejection

Applications:

Telecom
Laboratory Test
Receivers
Instrumentation

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Cryogenic filters

Cryogenic filters are specialized electronic components designed to operate efficiently in cryogenic environments (typically at liquid helium temperatures, 4K or below). These filters allow low-frequency signals to pass through while attenuating higher-frequency signals, making them essential in systems where signal integrity and noise reduction are critical. They are widely used in quantum computing, superconducting electronics, radio astronomy, and other advanced scientific and engineering applications.

Features:

1. Cryogenic Performance: Radio frequency cryogenic filters designed to operate reliably at extremely low temperatures (e.g., 4K, 1K, or even lower). Materials and components are selected for their thermal stability and lowthermal conductivity to minimize heat load on the cryogenic system.
2. Low Insertion Loss: Ensures minimal signal attenuation within the passband, which is crucial for maintaining signal integrity in sensitive applications like quantum computing.
3. High Attenuation in the Stopband: Effectively blocks high-frequency noise and unwanted signals, which is critical for reducing interference in low-temperature systems.
4. Compact and Lightweight Design: Optimized for integration into cryogenic systems, where spaceand weight are often limited.
5. Wide Frequency Range: Can be designed to cover a broad range of frequencies, froma few MHz toseveral GHz, depending on the application.
6. High Power Handling: Capable of handling significant power levels without performance degradation, which is important for applications like quantum computing and radio astronomy.
7. Low Thermal Load: Minimizes heat transfer to the cryogenic environment, ensuring stableoperation of the cooling system.

Applications:

1. Quantum Computing: Coaxial cryogenic filters ued in superconducting quantum processors to filter control and readout signals, ensuring clean signal transmission and reducing noise that could decohere qubits. Integratedinto dilution refrigerators to maintain signal purity at millikelvin temperatures.
2. Radio Astronomy: Employed in cryogenic receivers of radio telescopes to filter out high-frequency noise and improve the sensitivity of astronomical observations. Essential for detecting weak signals from distant celestial objects.
3. Superconducting Electronics: High frequency cryogenic filters used in superconducting circuits and sensors to filter out high-frequency interference, ensuring accurate signal processing and measurement.
4. Low-Temperature Experiments: Microwave cryogenic filters applied in cryogenic research setups, such as studies of superconductivity or quantum phenomena, to maintain signal clarity and reduce noise.
5. Space and Satellite Communication: Utilized in cryogenic cooling systems of space-basedinstruments to filter signals and improve communication efficiency.
6. Medical Imaging: Millimeter wave cryogenic low pass filters used in advanced imaging systems like MRI (Magnetic Resonance Imaging) that operate at cryogenic temperatures to enhance signal quality.

Qualwave supplies cryogenic low pass filters and cryogenic infrared filters to meet different requirements. The cryogenic filters are widely used in many applications.

Cryogenic Low Pass Filters
Part Number	Passband (GHz)	Insertion Loss (dB,Max.)	VSWR (Max.)	Stopband Attenuation (dB)	Connectors
QCLF-11-40	DC~0.011	1	1.45	40@0.023~0.2GHz	SMA
QCLF-500-25	DC~0.5	0.5	1.45	25@2.7~15GHz	SMA
QCLF-1000-40	0.05~1	3	1.58	40@2.3~60GHz	SSMP
QCLF-8000-40	0.05~8	2	1.58	40@11~60GHz	SSMP
QCLF-8500-30	DC~8.5	0.5	1.45	30@15~20GHz	SMA

Cryogenic Infrared Filters
Part Number	Attenuation (dB)	Connectors	Operating Temperature (Max.)
QCIF-0.3-05	0.3@1GHz, 1@8GHz, 3@18GHz	SMA	5K (-268.15℃)
QCIF-0.7-05	0.7@1GHz, 5@8GHz, 6@18GHz	SMA	5K (-268.15℃)
QCIF-1-05	1@1GHz, 24@8GHz, 50@18GHz	SMA	5K (-268.15℃)
QCIF-3-05	3@1GHz, 50@8GHz, 50@18GHz	SMA	5K (-268.15℃)