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

Model No. upj020020001108-07

KEYCOM offers a variety of semi-rigid coaxial cables for cryogenic applications, shown below in Table 1,
from which you can select in view of features such 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.
Operating frequency is DC-40GHz by default, but available up to 65GHz upon request.
The characteristic impedance is 50Ω.

【Related Contents】
👉 We can also provide NbTi-NbTi Superconducting Coaxial Cables.
👉 Cryogenic Products Line-up
👉 Bias-Tee for Cryogenic

Specifications and Model No. - Table 1

Part No.	Feature	Max. operating frequency (GHz)	External conductor		Dielectric		Internal conductor		Thermal conductivity (uW・cm/k)	Insertion loss (dB/m) at 10GHz
Part No.	Feature	Max. operating frequency (GHz)	Outer diameter(mm)	Material	Outer diameter(mm)	Material	Outer diameter(mm)	Material	Thermal conductivity (uW・cm/k)	300K	110K	77K	20K	4K
ULT-01	Minimal heat conductivity	66	2.20 [0.86 inch type]	SUS304	1.62	Foamed PTFE	0.51	SBC	170	5.32	4.07	3.85	2.49	2.39
ULT-04	Non-magnetic			BS				SBS	250	2.87	2.29	1.96	1.47	1.47
ULT-05	Low heat conductivity and low insertion loss			Cu（5μm） +SUS304				SBS	325	4.10	2.80	2.70	1.95	1.90
ULT-06	Easy to bend			CuNi				SCuNi	210	3.70	2.43	2.31	1.55	1.49
ULT-07	Easy to bend			CuNi				CuNi	60	10.50	9.50	9.00	8.00	7.20
ULT-08	Low heat			SUS304				SSUS	200	7.70	6.47	6.25	4.89	4.79
ULT-10	Thin	119	1.19 [047 inch type]	BC	0.94		0.29	SBC	170	4.70	3.80	3.33	2.90	2.75
ULT-11	Thin			CuNi				SCuNi	100	6.70	5.60	5.45	4.25	4.17
ULT-12	Thin			CuNi				CuNi	14	19.00	17.50	17.00	16.00	15.00
ULT-13	Low heat			SUS304				SSUS	99	8.80	7.80	7.40	7.00	6.90
ULT-20	Very thin	170	0.86 [034 inch type]	BC	0.66		0.20	BC	50	11.50	11.30	11.0	10.80	10.50
ULT-21	Very thin			CuNi				SCuNi	70	9.58	8.50	7.50	7.00	6.50
ULT-22	Very thin			CuNi				CuNi	9.5	21.91	17.90	15.50	14.50	13.50
ULT-23	Low heat			SUS304				SSUS	67	12.59	12.10	11.50	10.30	9.90
ULT-24	Very thin			BC				SBC	50	11.50	7.24	6.87	4.60	4.45
ULT-30	Ultra thin	430	0.33 [013 inch type]	SUS304	0.26		0.08	SUS304	4.6	66.90	52.00	47.40	40.10	39.00

*SBC: Silver plated beryllium copper (plate thickness 2.5 μm), BS:Brass, SBS: Silver plated brass (plate thickness 3.5 μm), BC: Beryllium copper, CuNi: Cupronickel, SCuNi: Silver plated cupronickel, SSUS: Silver plated SUS304
*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

Part No.	Normal insertion loss(dB/m25 °C)					Min. bending radius(mm)	Applicable connector
Part No.	1GHz	10GHz	20GHz	40GHz	60GHz	Min. bending radius(mm)	Applicable connector
ULT-01	1.64	5.32	6.98	11.17	17.3	12.0	SMA, APC2.9, APC2.4, APC1.85, GPPO(SSMP)
ULT-04	1.21	2.87	5.00	7.30	9.1	10.0
ULT-05	1.50	4.10	5.10	7.80	11.70	12.0
ULT-06	1.17	3.70	5.23	7.77	11.88	8.0
ULT-07	3.32	10.50	14.85	21.00	25.72	12.0
ULT-10	1.40	4.70	6.80	9.87	14.9	6.5
ULT-11	2.6	7.0	10.5	14.0	20.0	6.5
ULT-12	5.4	16.5	23.0	34.0	42.5	6.5
ULT-13	4.68	12.59	16.58	22.88	28.8	7.0
ULT-20	3.65	11.5	16.4	24.08	29.9	3.2
ULT-21	3.66	9.58	13.89	20.21	25.71	3.2
ULT-22	7.12	21.97	30.94	44.0	54.0	3.2
ULT-23	4.68	12.59	16.58	22.88	28.8	4.0
ULT-24	3.65	11.5	16.4	24.08	29.9	3.2
ULT-30	21.10	66.90	94.70	140.50	215.0	1.5

Connector type	MMCX	SMA	2.9mm(K)	2.4mm	1.8mm(V)	GPO(SMP)	GPPO(SMPM)
Max. operating frequency (GHz)	6	18.5	40 or (46)	50	60 or (65)	40	60 or (65)

Order model example

ULT	-	03	-	SMA(m)SMA(ｆ)	-	0500
		Cable type		Connector name		Connector phase front length (mm)