HCA air dielectric cables are high-power coaxial transmission lines designed for efficient RF signal transmission in broadcast, cellular, and microwave systems. They use air as the primary dielectric with a helical spacer, enabling extremely low signal loss and high power handling for long-distance RF feedlines.

 

Key Benefits

• Very low attenuation for efficient long-distance RF transmission
• High power handling capability for broadcast and high-power transmitters
• Excellent shielding with corrugated copper outer conductor
• Low VSWR and low intermodulation distortion for stable RF performance
• Better heat dissipation due to air dielectric design

 

Top Sellers

HCA78-50JM	7/8″ Air Dielectric Cable
HCA158-50JM	1-5/8″ Air-Dielectric Coaxial Cable, 50 ohm, Low Loss and High Power Rating
HCA300-50JM	3″ Low Loss Air Dielectric Cable
HCA400-50JM	4″ Low Loss Air Dielectric Cable

 

Typical Specifications

Parameter	Typical Value
Characteristic Impedance	50 Ω
Maximum Frequency	~3 GHz
Velocity Factor	~93%
Dielectric Type	Air with helical polyethylene spacer
Outer Conductor	Corrugated copper
Attenuation	Very low compared with foam coax
Peak Power Rating	Up to ~70 kW (depending on size)
VSWR	~1.2 typical

Example: a 7/8″ HCA cable can handle ~73 kW peak power with very low insertion loss.

 

Available Cable Sizes

Typical HCA cable sizes include:

Size	Typical Application
7/8″	Small broadcast or cellular feedlines
1-1/8″	Medium RF systems
1-5/8″	High-power base stations
2-1/4″	Broadcast transmitters
3″ – 6-1/8″	High-power broadcast or radar systems

Larger cables provide lower attenuation and higher power capacity.

 

Frequency Range

Typical supported frequency range:

Frequency	Typical Applications
VHF	Radio broadcasting
UHF	TV broadcasting
700 MHz – 2.7 GHz	Cellular networks
Up to ~3 GHz	Microwave communication

These cables are widely used in broadcast and high-power RF transmission systems.

 

Transmission Line Type

• Air-dielectric coaxial transmission line
• Inner conductor supported by helical dielectric spacers
• Corrugated copper outer conductor
• Characteristic impedance 50 Ω

Air dielectric cables offer lower loss and higher power capability compared to foam dielectric cables.

 

Common Connector Types

Typical connector interfaces include:

Connector Type	Typical Use
EIA flange connectors (1-5/8″, 3-1/8″, 4-1/2″, 6-1/8″)	High-power broadcast systems
7/16 DIN connectors	Cellular infrastructure
N-type connectors	Smaller RF equipment
Gas-stop / gas-pass connectors	Pressurized cable systems

These connectors maintain high power handling and impedance matching.

 

Typical Applications

HCA air dielectric cables are commonly used in:

• TV and radio broadcast transmitters
• High-power cellular base stations
• Microwave communication links
• Radar systems
• Antenna feedlines for large RF systems

 

Simple Explanation

• Air dielectric cable (HCA) → designed for very high power RF transmission
• CELLFLEX feeder cable → low-loss cable for cellular infrastructure
• RADIAFLEX cable → radiating cable acting as a distributed antenna