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MILTECH Overview
TIMES MICROWAVE SYSTEMS produces the MILTECH™ family of hermetically sealed flexible RF and microwave transmission line assemblies optimized for military and other demanding applications. These cables exhibit extremely long life in the rigorous environments found in airborne, shipboard, and ground based applications.
Detailed information regarding the performance of these sealed transmission lines is found in the individual TMS specifications.
Typical Performance Specifications
Electrical Characteristics
Tested Frequency Range | .5 to 18 GHz (10GHz for MILTECH 480) |
Characteristic Impedance | 50 Ohms |
VSWR | 1.4:1 maximum; add .05 per angle |
Insertion Loss | per TMS Detail Specification |
Velocity of Propagation | per TMS Detail Specification |
Maximum Operating Voltage | 2500 Volts (1000 volts with SMA) |
RF Leakage | -90 dB maximum per foot over Tested Frequency Range including connectors |
Insertion Loss Stability | In accordance with MIL-T-81490 |
VSWR Stability | In accordance with MIL-T-81490 |
Mechanical Characteristics
Operating Temperature Range | -55 to +150 degrees C (200 C maximum available on request) |
Chemical Resistance | In accordance with MIL-T-81490 and MIL-C-87104 |
Flexure | In accordance with MIL-C-87104 |
Salt Fog | In accordance with MIL-T-81490 and MIL-C-87104 |
Humidity | In accordance with MIL-T-81490 and MIL-C-87104 |
Abrasion Resistance | In accordance with MIL-T-81490 and MIL-C-87104 / .020" edge |
Cable Connector Tensile Strength | per TMS Detail Specification |
Vapor Leakage | 1x10-5 cc/sec/ft of Helium maximum including connectors |
Vibration | In accordance with MIL-T-81490 |
Shock | In accordance with MIL-T-81490 |
MILTECH™ Assembly Performance Overview
Electrical Characteristics - All of the MILTECH cable assemblies noted above provide true low loss, low VSWR - and inherently stable - performance. These sealed transmission line products provide the longest service life available.
Mechanical Characteristics - These cable assemblies are designed, manufactured, and tested to provide reliable interconnections in the most demanding installations and environments. This unparalleled combination of bending, torque, and tensile strengths guarantee a long service life.
Insertion Loss - Each TMS detail specification presents a graph of loss vs. frequency for the assembly. Also included are a table of losses at various frequencies, and an equation to be used for calculating losses at specific frequencies.
Testing - Each Cable Assembly is measured for Insertion Loss and VSWR over the Test Frequency Range per the TMS detail specification.
Connectors - All of the connectors used in these cable assemblies are of a precision Stainless Steel design which meet or exceed the requirements of MIL-C-39012. They are uniquely designed to provide maximum electrical, mechanical, and environmental performance.
Connector materials include: Gold Plated Beryllium Copper for Contacts, PTFE (Polytetrafluoroethylene) Dielectrics, and Bodies and Coupling Nuts of Stainless Steel.
Replaceable Front End Connector Types thread onto a factory installed Universal Intermediate Section. This design approach provides for easy replacement of a connector in the event of damage, or when the need arises to change to a different type of interface or angular configuration.
Cable Construction and Materials - The vapor sealed cable materials include: Silver Plated Copper strips and round wires for the Conductors, Polytetrafluoroethylene Tape for the Dielectric Core, Aluminum Backed Tape Interlayer Seals, Outer Vapor Seals of FEP / Composite Tapes, and an Outer Jacket of Nomex®.
ORDERING INFORMATION
Creating a complete TMS part number is described in the applicable TMS specification.
Cable assemblies with special requirements are issued distinct TMS part numbers.
Contact your Times Microwave Systems representative for additional information.
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