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FM Sidemount Antennas
828 Series

These FM sidemount antennas are designed for FM broadcasting applications which require circular polarization and low windloads.  The stainless steel design ensures that the antenna will give years of trouble free performance in the most hostile environments. The higher power series are pressurized to add further environmental protection.  Elements will tolerate a degree of light icing but for more severe environments, 828 antennas can be supplied with radomes. Contact RFS for details.  All 828 series antennas can be arrayed in any number of levels to suit most applications. The parallel feed system facilitates the customization of null fill and beam tilt to suit customer requirements.  The standard 828 antenna series is for high power applications; for medium power select the 828MP series. Both series have three models designed for bandwidth of 10 MHz. Additional factory tuning is available to achieve superior return loss specifications.  A wideband series of the 828 antenna, 828HP, covers the entire FM band from 88 to 108 MHz and utilizes half wavelength spacing.  The wide variety of possible configurations ensures that this antenna range meets the needs of most users on both price and performance.


  • Rugged stainless steel construction for maximum corrosion protection
  • Low downward radiation
  • Various power ratings available
  • Mixed polarization
  • Broadband operation to facilitate antenna sharing
  • 828 and 828HP series pressurized
  • 828MP series designed specifically for un-pressurized operation
  • Low windload to minimize tower or mast costs
  • Radomes are an available option for all 828 series
  • Temperature range -40 to + 60 degrees C available.

828 Series showing 828-8 Antenna

Technical features


Product LineAntenna TV
Product TypeBand II (VHF) 828-12 FM Sidemount Antennas

Electrical Specifications

Frequency Range MHz88 - 108
Operating Frequency Ranges MHz88 - 98
94 - 104
98 - 108
Gain per Plane of Polarization dBd8.76
Return Loss dB20 Note 1
Power Rating kW50
Input/Power Rating CommentPower ratings are for single input models. Dual input cavity versions can provide higher power ratings. Contact RFS for details. Connector types and impedance may be varied to suit customer requirements, contact RFS for details.
Impedance (unbalanced) Ω50

Mechanical Specifications

Number of Levels12
Input ConnectorSingle element 7/8" EIA
Array 7/8" EIA
1-5/8" EIA
3-1/8" EIA
Mounting (Standard) mm (in)Brackets for 60mm (2-3/8") pole mount
Effective Area Front (full antenna) No Ice m² (ft²)0.05 (0.54) Single Bay
Effective Area Front (full antenna) with 12.5mm(0.5") Radial Ice m² (ft²)0.05 (0.54) Single Bay
Effective Area Side (full antenna) No Ice m² (ft²)0.19 (2.04) Single Bay
Effective Area Side (full antenna) 12.5mm (0.5") Radial Ice m² (ft²)0.19 (2.04) Single Bay
Pressurization Operational kPa (psi)10 - 25 (1.5 - 3.6)
Pressurization Test kPa (psi)100 (15)
Weight kg (lb)7.5 (17) Single Bay

Packaging Information

Shipping Weight, Kg (lb)kg (lb)7.5 ()

External Document Links


Note 1 Arrays are factory tuned for a broadband performance and a return loss of 20dB across the specified bandwidth is achieved. Optional factory tuning for optimum narrow band performance will achieve a 30dB return loss over +/- 1MHz from the specified frequency. Arrays may be supplied un-tuned with a resulting return loss of 14dB.
Note 2 Array power ratings are limited by the radiator and power divider input connectors used. Typical limits are : 7-16 DIN 3.5kW, 7/8"" EIA 5kW, 1-5/8"" EIA 10kW and 3-1/8"" EIA 40kW.
Note 3 Mechanical specifications: For 828MP and 828 the single bay Effective Area Front is 0.05 sq m (0.54 sq ft), Effective Area Side is 0.19 sq m (2.04 sq ft). For 828HP, single bay Effective Area Front is 0.06 sq m (0.65 sq ft), Effective Area Side is 0.25 sq m (2.35 sq ft).