products / Tower Top Amplifiers (TTA)

Tower Top Amplifiers

Filtronic’s “SGG” Series TTA systems operate in the 700MHz and 800MHz public safety bands. The Tower Amplifiers (SAC00x) combined with the Control or Multicoupler Units (SEG00x) provide clients with a single, high-performance, high reliability, integrated tower top system solution for mission-critical radio networks.

700 and 800 MHz Tower Top Amplifier

Filtronic’s TTA systems are fully compliant with the most stringent public safety RF specifications. The amplifiers have excellent system flatness across the passband and low system noise figure while retaining linearity and out-of-band rejection. This provides optimum inbound coverage and dependable performance in mission-critical applications.


A key feature of the platform is smart redundancy, which continuously monitors the health of the balanced quadrature-coupled amplifiers. In the case of a failure in one of the amplifiers, the system can continue to operate using the redundant amplifier. If both amplifiers are lost the system will function in a bypass mode.

The TTA system features gain flatness across the band typically less than 0.5 dB, third order intermodulation of greater than +13dBm, noise figure of typically less than 2.5dB, and a high performance preselector filter. This gives radio system operators the confidence knowing their mission-critical networks will reliably operate with resilient connections and higher quality audio, especially in congested environments.

A complete, receive signal tower top amplifier system designed for 700 and 800 MHz communication networks.

  • Easy to order using one-part number for the entire system.
  • Available in diversity or non-diversity options
  • Robust lightning strike and IIP3 performance verified by industry standard testing.
  • Best in class design based on years of Tower Mounted Amplifier development experience.

The compact TTA units measure approximately 9 x 6.8 x 2 inches (229 x 173 x 51 mm) and weigh less than 3.6kg (8 lb.). The space saving 1RU rack-mounted control units have model options with eight output ports, expandable to either 16 or 32 ports using optional expansion kits.
For more information on Electrical and Mechanical specifications please contact us.

SGG Series with Control Unit

SGG Series TTA with Multicoupler Unit

SGG Series with Control Unit

SGG Series TTA with Multicoupler Unit

SGG Series with Control Unit

Tower Amplifier System with Control Unit

Features & Benefits


  • Available in diversity and non-diversity models
  • Superior system flatness at ≤ 0.5 dB, which is the maximum variation in gain across the band offering improved noise figure at the band edges.
  • System IIP3 3rd order intercept point typically >13.9 dBm for in-band emissions. This allows for improved linearity and reduction of IM products.
  • High rejection preselector which reduces the risk of ‘desense’.
  • Compact footprint; Control Unit or Multicoupler are only 1RU high for up to 16 outputs, and 2RU for 32 outputs.
  • Low weight & physical size; Amplifier (< 8 lbs. and 174 cu. in volume) reduces tower loading.

SGG Series TTA with Multicoupler Unit

Tower Amplifier System with Control Unit and Multicoupler

Features & Benefits


  • Available in diversity and non-diversity models
  • Base model outfitted with eight output ports, expandable to either 16 or 32 ports using optional expansion kits.
  • Superior system flatness at ≤ 0.5 dB, which is the maximum variation in gain across the band offering improved noise figure at the band edges.
  • System IIP3 3rd order intercept point typically >13.9 dBm for in-band emissions. This allows for improved linearity and reduction of IM products.
  • High rejection preselector which reduces the risk of ‘desense’.
  • Compact footprint; Control Unit or Multicoupler are only 1RU high for up to 16 outputs, and 2RU for 32 outputs.
  • Low weight & physical size; Amplifier (< 8 lbs. and 174 cu. in volume) reduces tower loading.