Radio Frequency Systems company website is optimized for recent browsers :
IE9+, Chrome 31+, Firefox 31+, Opera 28+, Safari 7+

My e-catalog

FM Sidemount Antennas
CPF Series

The CPF series of FM antennas are designed for low wind load, low cost, single channel requirements. These antenna elements are circularly polarized with an omnidirectional pattern. A choice of two input connector sizes provides power ratings of 500 W or 2.5 kW per bay. An optional radome fully enclosing the radiating element is also available for sites where icing is likely. The antennas are designed to be sidemounted to a vertical pole and a wide range of mounting brackets are available for this purpose.
Multiple element arrays are supplied as a complete package including power dividers and distribution cables. An optional input tuner ensures optimum VSWR performance after installation as it enables the effects of tower steelwork to be eliminated. Beam tilt and null fill can be provided on request.


  • Single channel operation
  • Rugged stainless steel construction
  • Low cost
  • Low windload
  • Power rating of up to 20kW for an 8 bay antenna
  • Optional radome available for icing conditions
  • Optional Input tuner ensures optimum VSWR
  • Parallel (Corporate) feed network provides low downward radiation.

CPF Series showing CPF500-1 antenna

Technical features


Product LineAntenna TV
Product TypeBand II (VHF) CPF2500-4 FM Sidemount Antennas

Electrical Specifications

Frequency Range MHz87.5 - 108
Gain per Plane of Polarization dBd3
Circularity in free space dB +/- 2
Return Loss dB>20 (typically >26dB)
Power Rating kW10.0 (1-5/8" EIA i/p connector)
Impedance (unbalanced) Ω50

Mechanical Specifications

Number of Levels4
Input ConnectorSingle element 7-16 DIN
Array 7-16 DIN
1-5/8" EIA
Mounting (Standard) mm (in)38 to 64 mm diameter mounting pipe (not supplied)
Effective Area Front (full antenna) No Ice m² (ft²)0.22 (2.4)
Effective Area Front (full antenna) with 12.5mm(0.5") Radial Ice m² (ft²)0.22 (2.4)
Effective Area Side (full antenna) No Ice m² (ft²)0.033 (0.35) - Single Bay
Effective Area Side (full antenna) 12.5mm (0.5") Radial Ice m² (ft²)0.033 (0.35) - Single Bay
Weight kg (lb)23.1 (51)

Packaging Information

Shipping Weight, Kg (lb)kg (lb)23.1 ()


MaterialStainless Steel
Material - RadomeStainless Steel
Material - InsulatorsStainless Steel
Material - Support Pole / MountingStainless Steel
Material - RadiatorsStainless Steel
Material - Reflecting ScreenStainless Steel

CPF antenna element with radome (semi transparent for illustration purposes only)

External Document Links