Passive and active signal conditioning specialists

Our engineering team are industry experts in designing high performance filters, combiners, and amplifiers that deliver world-class performance and reliability.

Passive & active RF solutions

Filtronic has a long history in the design and manufacture of leading-edge coverage enhancement products for the wireless industry. We are a key supplier of advanced high performance RF communications products to the telecommunications infrastructure and critical communications markets. Our products are used in wireless communication equipment, point-to-point communication systems and adjacent aerospace and defence sectors. Download our latest technologies brochure here

Lumped element filters

We understand filter topology and can work with the perfect technology for each challenge, while offering rapid prototyping and reduced development cycles.
  • Narrowband and broadband designs available
  • High pass, low pass
  • Band pass, band stop and multiplexer form
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Metal cavity filters

Filtronic has extensive expertise of machined and cast metal cavity filters. Cavity filters offer the user very low insertion loss, steep skirt selectivity, and narrower bandwidths than discrete component filters.
  • Low loss
  • Tight rejection specifications
  • High power
  • Low passive interm
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Suspended substrate filters

500MHz to 26GHz
Suspended Substrate Stripline (SSS) is traditionally a printed circuit technology that can be used for both broadband and narrowband filters.
  • Suitable for high pass and low pass filters that can be cascaded together to form broadband band pass filters and multiplexers
  • Utilising printed circuit technology
  • Repeatable performance across narrowband and broadband applications
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Thin film filters

3GHz - 114GHz
Surface mountable thin film filters are available in band pass, band stop, high pass and low pass configurations.
  • Perfect for space critical applications
  • Frequency range suitable from 3GHz to 114GHz


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Small cell filters

Maximum performance for the smallest space is critical when space is at a premium. As data demand continues to grow and technology continues to reduce in size, small cell sites become increasingly attractive.
  • Ideal where size, weight and performance are key
  • Thin wall filters
  • Use of different materials eg magnesium, mixed mode filters and advanced ceramics
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Cross band combiners

Cross-band combiners are used to combine multiple frequency bands and are technology independent. They consist of wideband filters for each required band combined with a common junction to enable each band to be presented to a common antenna connection
  • Supports different technologies; GSM, UMTS, CDMA, WCDMA and LTE
  • Covers wide range of wireless frequency bands; 700, 800, 900, 1200, 1800, 2100 and 2600MHz
  • Signals from multiple base stations
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Filtronic welcomes delegation of MPs from BEIS Select Committee focussed on semiconductor supply.

21 September 2022

Filtronic collaborates in launching North East Advanced Material Electronics cluster group

27 July 2022

Filtronic introduces E-band active diplexers with integral PAs and LNAs

15 June 2022

Filtronic unveiling a new range of Active Diplexers at IMS 2022