Rigid line coupling element 52-120 BT


SPINNER Rigid Coaxial Lines components - robust performance

A rigid coaxial transmission line is mainly used in broadcast systems to transmit radio frequency signals between transmitter and combiners as well as between combiners and the antenna. The advantage of rigid coaxial lines is that the radiation leakage and attenuation, especially at higher frequencies, is lower than with flexible coaxial cables. This means that greater power can be transmitted, and higher shielding attenuation can be achieved.

Outstanding RF characteristics, best possible passive intermodulation and VSWR

The Rigid line coupling element 52-120 BT enables you to transmit high-frequency signals reliably and flawlessly with optimum protection of your sensitive equipment in a power range up to 140 kW @ 100 MHz (at +40 °C ambient temperature), 92 kW @ 230 MHz (at +40 °C ambient temperature), 47 kW @ 860 MHz (at +40 °C ambient temperature) 1) with maximum passive intermodulation (IM3).

It supports the use of the following frequency bands : Band 1, Band 2, Band 3, Band 4/5

The positive characteristics are briefly summarised: outer conductor system aluminum / aluminum-alloy, quick and simple assembly, no special tools required, PTFE insulation, for indoor application.

With the flaring technique system (BT) the outer conductor tube is flared by using a SPINNER flaring tool. The different components are connected together with coupling elements. The electrical contact at the outer conductor is done via a metallic ring which is mounted on periphery of the insulation disc of the coupling element. The very stable connection ensures a high RF tightness and repeatable electrical length. The BT flaring technique system is provided for indoor application and is designed to handle the maximum RF power up to 860 MHz. Please take into consideration that for rigid lines inner supports are necessary depending on the wanted line length. The inner supports prevent the inner conductor from sagging.

RF characteristics

Number of interfaces:
Interface type:
52-120 BT (50 Ω)
Interface direction:
Waveguide component type:
Coupling element
Frequency range:
DC to 890 MHz
Frequency band:
Band 4/5, Band 3, Band 1, Band 2
Cut-off frequency:
1.0 GHz (H11 mode)
Average power rating:
140 kW @ 100 MHz (at +40 °C ambient temperature)
92 kW @ 230 MHz (at +40 °C ambient temperature)
47 kW @ 860 MHz (at +40 °C ambient temperature) 1)
Proof voltage rating:
22 kV
Proof voltage rating remark:
(at sea level (NN))
Insertion loss coefficient /100m:
0.24 dB @ 100 MHz (at +20 °C ambient temperature)
0.36 dB @ 230 MHz (at +20 °C ambient temperature)
0.69 dB @ 860 MHz (at +20 °C ambient temperature)

Mechanical characteristics

Weight, approx.:
1.31 kg

Further remarks

• outer conductor system aluminum / aluminum-alloy
• quick and simple assembly
• no special tools required
• PTFE insulation
• for indoor application
also 57.0 kW @ 860 MHz possible, in this case it is necessary to paint the rigid line with a black, heat resistant varnish
Customs tariff number:



Product data sheet – 528101 – CB-L-196-197-DS.pdf


Installation instructions – 528101 – M36127.pdf