Data Sheet: GORE® Microwave Sealed Airframe Assemblies
United States
Includes description, typical uses, sample applications, features and benefits, technical specifications, and ordering information.
High-Performance Vapor-Sealed Cable Assemblies for Airborne Applications
With superior electrical performance, Gore Microwave Sealed Airframe Assemblies (7-Series) are specifically designed for airframe microwave interconnect needs. These assemblies are qualified for aerospace applications and meet the MIL-T-81490 mechanical and environmental requirements (listed in Table 2) for airframe cables.
Gore Microwave Sealed Airframe Assemblies are vapor sealed to prevent the ingress of water vapor, jet fuel, and other contaminants to ensure that they maintain their electrical performance over the entire life cycle. They provide consistently reliable performance with longer service life and reduced system downtime, resulting in lower life cycle costs for the aircraft operator.
These assemblies are designed to satisfy the most stringent specification requirements of the next generation of military and commercial aircraft.
Typical Applications
- Airframe interconnects for electronic defensive systems (signal detection, interception, identification)
- Electronic payload interconnects including active electronically scanned array (AESA) radar
- Commercial and business aircraft SATCOM connectivity
Benefits of Gore Microwave Sealed Airframe Assemblies
- Durable vapor sealing prevents ingress of contaminants
- Flexible cable assemblies for ease of installation
- Easy routing in confined spaces due to small diameter
- Outstanding shielding effectiveness from durable cable construction
- Low insertion loss for a given diameter
- Maintains insertion loss, return loss, and phase performance over entire life cycle
- Meets the mechanical and environmental requirements for airframe cables defined in MIL-T-81490
- Comprehensive qualification data available to support product claims
Table 1: Specifications*
Electrical Properties
| Cable Type | 7G | 75 | 7E | 7L | 7M |
|---|---|---|---|---|---|
| Max Frequency (GHz) | 40.0 | 18.0 | 18.0 | 7.0 | 2.0 |
| Impedance (ohms) | 50 ± 1 | 50 ± 1 | 50 ± 1 | 50 ± 1 | 50 ± 1 |
| Dielectric Constant | 1.4 | 1.4 | 1.4 | 1.4 | 1.4 |
| Insertion Loss at Max Frequency dB/m (dB/ft) | 2.56 (0.78) | 1.05 (0.32) | 0.62 (0.19) | 0.33 (0.10) | 0.129 (0.04) |
| Velocity of Propagation | 85% | 85% | 85% | 85% | 85% |
| Time Delay ns/m (ns/ft) | 3.94 (1.2) | 3.94 (1.2) | 3.94 (1.2) | 3.94 (1.2) | 3.94 (1.2) |
| Shielding Effectiveness (dB to Max Frequency) | > 90 | > 90 | > 90 | > 90 | > 90 |
Mechanical / Environmental Properties
| Cable Type | 7G | 75 | 7E | 7L | 7M |
|---|---|---|---|---|---|
| Outer Diameter mm (in) | 3.80 (0.150) | 5.30 (0.210) | 8.50 (0.335) | 12.32 (0.485) | 14.35 (0.565) |
| Mass g/m (oz/ft) | 36.0 (0.39) | 63.0 (0.67) | 150.0 (1.61) | 262.0 (2.82) | 328.0 (3.52) |
| Minimum Bend Radius mm (in) | 19.0 (0.75) | 25.0 (1.0) | 50.0 (2.0) | 62.5 (2.5) | 80.0 (3.15) |
| Center Conductor | Solid | Solid | Solid | Stranded | Solid |
| Operating Temperature °C (°F) | -58 to +200a (-72 to +392) | -58 to +200a (-72 to +392) | -58 to +200a (-72 to +392) | -58 to +200a (-72 to +392) | -58 to +200a (-72 to +392) |
| Crush Resistance kgf/cm (lb/in) | 8.95 (50.0) | 8.95 (50.0) | 8.95 (50.0) | 8.95 (50.0) | 8.95 (50.0) |
* All values listed are nominal
a Contact a Gore representative for applications with an operating temperature > 175°C.
Table 2: Qualification Summary
Summary of the qualification compliance for Gore Microwave Sealed Airframe Assemblies.
| Examination or Test | Specification | Status |
|---|---|---|
| Seal - Vapor Leakage | MIL-STD-202, Notice 9, Method 112E, paragraph 5, Condition C, Procedure IV | Compliant |
| Temperature Shock | MIL-STD-810, Method 503.2 | Compliant |
| Vibration | MIL-STD-810, Method 514.3, Procedure I | Compliant |
| Power Handling Capability | MIL-T-81490, paragraph 4.7.13 | Compliant |
| Flexure | MIL-T-81490, paragraph 4.7.15 | Compliant |
| Tensile Load | MIL-T-81490, paragraph 4.7.17 | Compliant |
| Concentrated Load | MIL-T-81490, paragraph 4.7.18 | Compliant |
| Abrasion | MIL-T-81490, paragraph 4.7.19 | Compliant |
| Sand and Dust | MIL-STD-810, Method 510.2, Procedure I | Compliant |
| Humidity | MIL-STD-810, Method 507 | Compliant |
| Salt Fog | MIL-STD-810, Method 509, Exposure ≥ 96 hours | Compliant |
| Dielectric Withstanding Voltage | MIL-STD-202, Method 301 | Compliant |
| Icing/Freezing Rain | MIL-STD-810, Method 521.0 | Compliant |
| Fungus Resistance | MIL-STD-810, Method 508.3 | Compliant |
| Rain - Drip | MIL-STD-810, Method 506.2, Procedure II | Compliant |
| Rain - Blowing Rain | MIL-STD-810, Method 506.2, Procedure I | Compliant |
| Corona Extinction Voltage | MIL-C-17, paragraphs 3.7.5 and 4.8.6 | Compliant |
Ordering Information
To place an order for GORE® Microwave Sealed Airframe Assemblies, please contact your Gore sales associate or visit gore.com for additional ordering information.
NOTICE — USE RESTRICTIONS APPLY
Not for use in food, drug, cosmetic or medical device manufacturing, processing, or packaging operations.
GORE and designs are trademarks of W. L. Gore & Associates ©2015 W. L. Gore & Associates, Inc. GMCA-0052-R2-DAT-US-NOV15