Multiport Connectors
Multiport Connectors

SV Microwave is proud to offer size 8, 12 and 16 coaxial contacts for the D38999 housing and standard inserts, as well as for ARINC and Micro-D styles. Size 8 contacts are available in DC to 40 GHz versions, size 12 are available from DC to 60 GHz and size 16 are available from DC to 65 GHz.

High frequencies are achieved through our unique "Float Mount" technology designed into the contacts. This technology allows for consistent microwave performance while maintaining tight mechanical tolerances. These contacts exhibit superior electrical performance and, unlike other blindmate connectors, will maintain an accurate phase length when mated.

Termination types range from board mounting to semi-rigid and flexible cable. Designs are available to fit standard MIL-C-17 RG cables including .141" and .085" semi-rigid cables as well as a variety of custom and low loss flexible cables.

These contacts also use standard interfaces that are based on MIL-STD-348 and can be used with any D38999 insert. This allows your application the ability to continue to use the D38999 connector while expanding the use to include microwave transmission lines. No custom connectors or separate RF interfaces are needed.

Coordination between Amphenol divisions has produced high frequency contacts for a number of proprietary designs as well. SV and Amphenol Aerospace have collaborated to introduce high frequency contacts into their HDB3 and LRM connectors, the Amphenol Backplane Systems’ VIPER series and Amphenol Air LB’s SIM Modular Interconnection . We also produce custom multiport blocks with standard cavity sizes and SV proprietary designs.

These new contacts have enabled SV to combine RF-Microwave and D/C signal and power in hybrid harnesses. Our hybrid harnesses provide simplified interconnection and smaller package size to aid both designers and operators in the field.


Multiport High Frequency Contacts
Size 8, 12 and 16 coaxial contacts
For M38999, ARINC 404 and 600, MIL-DTL-83527 and VITA connectors
Amphenol HDB3, LRM, VIPER, SIM



  • Compatible with all Size 8, 12 and 16 D38999 inserts
  • Superior electrical performance
  • Accurate phase length when mated
  • Operating frequency range up to  DC to 65 GHz


  • Military Communication Terminals
  • Shipboard and Airborne Systems
  • Phased Array Radars
  • High Density Multiport Requirements
  • Harsh Environment Applications




(Mated pair - RG 405 Semi-Rigid Cable)



DC - 40 GHz

Nominal Impedance

50 Ohms


1.05 + .01f (GHz)

RF Transmission Loss

.03 x ?¯f (GHz)

Insulation Resistance

10,000 Megohms Min.

Contact Resistance

            Center Contact 6.0

            Outer Contact 3.0

            Outer Contact to Cable


6.0 Milliohms Max.

3.0 Milliohms Max.

0.5 Milliohms Max.

Dielectric Withstanding Voltage

1,000 Volts RMS

Corona Extinction Voltage at 70,000 Ft.

250 Volts Min.

RF High Potential at 5 MHz

500 Volts RMS

RF Leakage

Interface Only

–(80-fGHz) dB Min.

(fully mated)


Materials and Finish

Body and Sleeve

Stainless Steel per AMS-5640 Alloy UNS S30300 Type 1


Brass per ASTM B16, Alloy UNS C36000

Contact and Lock Ring

Beryllium Copper per ASTM B196 Alloy UNS C17300, Td04


PTFE per ASTM D1710, Type 1, Grade 1, Class B


Stainless Steel per ASTM A313 Type 631

Rear Body and Contacts

Gold per ASTM B488 Type II, Code C, Class 1.27

over Nickel per AMS-QQ-N-290 Class 1

over Copper per MIL-C-14550

Passivated per AMS-2700, Type 2



Temperature Rating

–65°C to +125°C (Semi-Rigid)

Corrosion (Salt Spray)

MIL-STD-202, Method 101, Condition B


MIL-STD-202, Method 204, Condition D, 20 Gs


MIL-STD-202, Method 213, Condition I, 100 Gs

Thermal Shock

MIL-STD-202, Method 107, Condition B, –65°C to +125°C

Moisture Resistance

MIL-STD-202, Method 106, Less Step 7B

Barometric Pressure (Altitude)

MIL-STD-202, Method 105, Condition C, 70,000 Ft.