What Is TCOM Low Loss Coax Cable?

TCOM Cable is a low loss coaxial interconnection cable for ultra-high frequency (UHF) and super-high frequency (SHF) applications up to 10 GHz. The cable exhibits exceptional low loss characteristics of up to 10.6 dB per 100 feet at 10 GHz (TCOM-600). This cable has excellent passive intermodulation (PIM) properties of 155 decibels relative to the carrier (dBc) that help prevent intermodulation interference between LTE uplink transmitters and downlink receivers operating at closely spaced frequencies.  

TCOM cable from Times Microwave Systems has excellent bending properties and greater flexibility than competing cables. It has a 20-year outdoor service rating. TCOM coaxial cable has a characteristic impedance of 50-ohms.

How Is TCOM Coaxial Cable Constructed?


The cable has a solid pure copper conductor with a diameter that's between 0.037 inches and 0.0176  inches.


The dielectric is polyethylene foam with a dielectric constant between 1.42 and 1.56.

Internal Screen

The outer conductor that forms part of the dual-screen is made from aluminum tape.

External Screen

There's a secondary external screen made from a silver-plated copper wire braid that has excellent radio frequency suppression properties.


The jacket material depends upon the application and includes polyethylene (PE), low halogen polyethylene and polyurethane (PUR).

TCOM Cables for Different Applications

Standard TCOM cables have excellent ultra-violet (UV) resistance and a 20-year outdoor rating. The standard jacket is polyethylene, but you can also specify a polyurethane (PUR) jacket with a watertight rating indicated by the letters DB. Cables with the low halogen polyethylene jacket have the National Electrical Code (NEC) CMR rating as fire-retardant cables for indoor use as building risers.

Differences Between TCOM and LRM Coaxial Cable

TCOM and LRM cables from Times Microwave share many similarities, including almost identical sizes, similar low-loss attenuation properties, capacitance and impedance. Externally, the cables are similar and TCOM and LRM cables use the same connectors and connection tools.

The main difference is that LRM cables don't have the same passive intermod properties, so are not suitable for LTE and similar applications. Another difference is that you can get 50-ohm and 70-ohm LRM cables, whereas TCOM only comes with a 50-ohm characteristic impedance.

TCOM Applications

The primary application for TCOM cable is as a low PIM cable for cellular wireless base stations. With a dual-screen, TCOM cable has excellent radio frequency properties and you can use it as a low loss interconnection cable for UHF and microwave signals. The cable is suitable as a substitute for LRM cable types with the same dimensions.

TCOM Low Loss Cable Properties

Conductor: Solid Copper
Dielectric: Foam PE
Shield: Dual shield with aluminum tape on the inside and silver-coated copper braid outside
Jacket: PE or PUR
Passive Intermod Properties: Greater than 155 dBc (relative to carrier)
RF Shielding Effectiveness: Greater than 100 dB
Withstand Voltage: Depends on cable diameter but between 1,000 and 4,000 volts
Operating Temperature Range: -40°C to +85°C
Outdoor Life Rating: 20-years

Other TCOM Characteristics

Cable OD (in) dB Loss/100ft
at 10GHz
Peak Power
Minimum Bend
Radius (in)
TCOM-195 0.195 36.8 2.5 0.5
TCOM-200 0.200 33.7 2.5 0.5
TCOM-240 0.240 28.2 5.6 0.75
TCOM-300 0.300 22.7 10 0.88
TCOM-400 0.400 15.7 16 1.00
TCOM-500 0.500 12.7 22 1.25
TCOM-600 0.600 10.6 40 1.5

We can supply TCOM cable as pre-terminated assemblies on request. Contact us for further information regarding TCOM and other specialty low loss coaxial cable applications.