Semi rigid cables for cryogenic applications

Cryogenic Components

Semi-Rigid Cables for Cryogenic (Super Low Temperature) Application

We offer wide variety of superconducting semi-rigid coaxial cables for cryogenic applications, from which you can select based on such features as heat conductivity, flexibility, insertion loss, permeability, or thickness to meet your specific requirements. They are low in heat conductivity, minimizing inflow of the heat from the high-temperature end. Frequency : DC-40GHz (DC-65GHz upon request). Impedance is 50Ω with or without connectors

Specifications and Model No. - Table 1

Characteristics	Model Number	Outer diameter φ	Heat quantity μw/k *note1**		Insertion Loss dB/m at 10GHz
Characteristics	Model Number	Outer diameter φ	4K-20K	4K-100K	300K	110K	77K	20K	4K
Minimum heat conduction	ULT-01	2.2mmφ (0.085")	35	167	5.32	4.07	3.85	2.49	2.39
Flexible and low heat conduction	ULT-02	2.2mmφ (0.085")	60	177	4.65	3.67	3.26	2.85	2.75
Minimum insertion loss	ULT-03	2.2mmφ (0.085")	84	350	2.69	2.06	1.7	1.2	1.14
Non-magnetic	ULT-04	2.2mmφ (0.085")	146	493	2.87	2.29	1.96	1.47	1.47
Low heat conduction and low insertion loss	ULT-05	2.2mmφ (0.085")	65	196	2.60	2.25	1.85	1.31	1.24
Thin	ULT-10	1.19mmφ	50	170	4.40	3.50	3.03	2.60	2.45
Very Thin	ULT-20	0.86mmφ	28	94	6.58	4.33	4.11	2.75	2.65
Ultra Thin	ULT-30	0.33mmφ	1.6	4.6	72	56	51	44	42

(General example: Cupronickel) Note that Insertion loss is larger.

Characteristics

Model

Number

Outer diameter φ

Heat quantity μw/k note*1

Insertion Loss dB/m at 10GHz

4K-20K

4K-100K

300K

110K

77K

20K

Larger insertion loss

0.085"

229

10.10

9.56

9.43

9.37

8.5

note*1 : Heat quantity required for one end of 10 cm long cable (excluding connectors) to reach 20 K or 100 K when 4 K

heat anchor is applied to the other end of the cable.

Specifications and Model No. - Table 2

Model Number	Minimum bending radius mm (to the center of cables)	Standard Insertion Loss dB/m(25°C)				Material		Available connector
Model Number		1GHz	10GHz	20GHz	40GHz	Inner conductor	Outer conductor	Available connector
ULT-01	12	1.64	5.32	6.98	11.17	SBC	SUS304	SMA, APC2.9, APC2.4, APC1.85
ULT-02	8	1.87	6.05	9.56	12.71	SBS	SUS304
ULT-03	12	0.82	2.69	3.49	5.65	SBC	Cu70μm+SUS304
ULT-04	10	1.205	2.87	5.0	6.03	SBS	BS
ULT-05	12	0.90	2.80	4.60	7.30	SBS	Cu5μm+SUS304
ULT-10	6.5	1.40	4.70	6.80	9.87	SBC	SBC	SMA, MMCX, GPO
ULT-20	3.2	2.0	6.58	9.44	14.5	BC	BC
ULT-30	1.5	21.1	66.9	94.7	140.5	SUS304	SUS304

(Example: Cupronickel)
Model Number	Minimum bending radius mm (to the center of cables)	Standard Insertion Loss dB/m(25°C)				Material
Model Number		1GHz	10GHz	20GHz	40GHz	Inner conductor	Outer conductor
-	12	3.1	10.1	14.2	21.2	Cupronickel	Cupronickel

SBC: Silver plated beryllium copper (plate thickness 2.5 μm) SPC: Silver plated annealed copper wire

SBS: Silver plated brass (plate thickness 3.5 μm) BC: Beryllium copper

Order model example

ULT-03-SMA(M)SMA(F)-0500

Cable type – connector name – Connector phase front length (mm)