1.37mm RF Cable: Antennas, Assembly, Features & Applications | Eteily
Introduction
As IoT devices become smaller, smarter, and more compact, the internal RF link becomes increasingly important to overall wireless performance. One such critical connector is the 1.37mm RF cable, which is frequently utilized in modern IoT, wireless modules, routers, cameras, and embedded systems.
Eteily Technologies provides and integrates 1.37mm RF cable assemblies designed for tiny antenna connections where space, flexibility, and signal integrity are crucial.
This blog describes what:
What is a 1.37mm cable?
Which antennas utilize 1.37mm cables?
How are 1.37mm cable assemblies made?
Features, specs, and practical applications
What is a 1.37mm RF Cable?
A 1.37mm RF cable is a micro-coaxial cable with an outside diameter of about 1.37 mm that is used to transmit RF signals over small distances inside miniature electronic devices.
It is often combined with:
IPEX, MHF, and UFL connectors
Board-to-antenna connections
Internal antenna routing for space-constrained designs
Despite its small size, the 1.37mm cable can carry high-frequency RF signals with a steady impedance and low insertion loss over short distances.
Which antennas use 1.37mm cables?
1.37mm RF cables are commonly used with internal and external tiny antennas where flexibility and a small bend radius are required.
1. Internal antennas.
PCB trace antennas
Flexible Printed Circuit (FPC) antennas
Ceramic Chip Antennas
Use Case: Connecting antenna elements inside enclosures to the RF module.
External Compact Antennas
LTE/4G stub antennas
WiFi and Bluetooth antennas
GNSS patch antennas
LPWAN antennas (LoRa and NB-IoT)
Use Case: Connecting RF signals from a PCB to an external antenna using IPEX-to-SMA or IPEX-to-IPEX assemblies.
3. Module-based RF systems
Wi-Fi Modules
LTE Cat-1 and Cat-M modules
GNSS modules
Zigbee/Thread modules
These modules often incorporate IPEX/MHF connectors, hence 1.37mm cable assemblies are the industry standard.
How is a 1.37mm cable assembly put together?
A 1.37mm cable assembly is more than simply a cable; it's a precise RF component.
Step-by-step Assembly Process
1. Cable preparation.
Micro-coaxial cable cut to the appropriate length.
The outer jacket was removed with micron-level precision.
Shield braid and dielectric are carefully exposed.
2. Connector Termination.
IPEX/MHF connector crimped or soldered.
The center conductor is properly aligned.
Shield grounded to the connector shell.
3. Impedance Control.
Maintaining a 50Ω typical impedance.
It prevents signal reflection and mismatch.
4. Testing and Validation.
The continuity test
VSWR and insertion loss testing.
Mechanical pull and flex testing.
At Eteily Technologies, all cable assemblies are RF tested rather than visually inspected.
Key Specifications of 1.37mm RF Cable
Ultra-compact diameter (1.37 mm).
Excellent flexibility in confined spaces.
Stable 50Ω impedance.
Compatible with micro RF connectors (IPEX, MHF, and U.FL).
Supports multiple-band frequencies.
Lightweight, low-profile
Technical Specifications for 1.37mm Cable
Applications for 1.37mm RF Cable
1. IoT devices.
Smart Meters
Asset trackers
Environmental sensors
2. Wireless Communication Devices.
Wi-Fi Routers
Bluetooth hubs
ZigBee gateways
3. Cellular devices
LTE/4G modules
NB-IoT and Cat-M devices
Vehicle telematics units
4. GNSS and Navigation Systems.
GPS trackers
Fleet management systems
Drones and robots
5. Consumer and Industrial Electronics
Smart cameras
POS terminals
Industrial control units
Why It's Important to Choose 1.37mm Cable
Using a low-quality micro RF cable can lead to:
Reduced antenna range.
Higher VSWR
Increased packet losses
Reduced battery life.
A properly built 1.37mm cable guarantees that antenna performance corresponds to the RF design objective.
Eteily Technologies Expertise
At Eteily Technologies, we offer:
Custom-length 1.37mm cable assemblies.
IPEX-to-SMA and IPEX-to-IPEX setups.
Antenna + cable + connector match
RF performance validation support
Conclusion
The 1.37mm RF cable is a modest but essential component of modern wireless devices. It allows for reliable RF signal transfer between antennas and modules in tiny designs, ranging from IoT sensors to LTE gateways.
Choosing the suitable 1.37mm cable assembly, along with the appropriate antenna and connector, is critical for obtaining maximum range, efficiency, and dependability.
Eteily Technologies is your trusted partner for specialized RF cable assemblies and antenna solutions.
Contact Us
Eteily Technologies India Pvt. Ltd.
📫 Address: B28 Vidhya Nagar, Near SBI Bank,
📍 District: Bhopal, PIN: 462026, Madhya Pradesh
🌐 Website:https://eteily.com