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

GaN amplifiers

GaN technology offers significant performance advantages in the application of point-to-point microwave and backhaul transceivers.
  • Ultra-compact GaN amplifier
  • For point-to-point microwave and backhaul
  • A range of extremely compact, high-efficiency amplifier modules based on our proprietary GaN power FET technology
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Custom filters

Filtronic produces a range of filters, including metal cavity filters, ceramic, combline, interdigital, lumped element, suspended substrate, waveguide and thin-film.
  • Key component in high performance wireless technology
  • Range of environmental conditions
  • Medium to extremely high frequency – MHz to GHz
  • Bespoke designs, working to a customer’s form factor
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Custom combiners

Using highly skilled and experienced engineers with an innovative approach, we offer bespoke design for all our product range including filters, combiners, and amplifiers.
  • Maximise base station investment
  • Delivering highest-in-class performance
  • Combiners for telecoms and critical communications
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Interference mitigation filters

Interference suppression filters provide a simple, cost effective and low loss solution for minimising spectral emissions and attenuating interference signals.
  • Extensive track record
  • Customised solutions
  • Cost effective
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Ceramic filters

Filtronic have a rich history in ceramic filter design and manufacture. Filter capability includes TE, TEM, TM, Quasi-T, ceramic combline etc. dependent upon the required filter performance and size.
  • Ability to design and manufacture
  • Higher Q, lower insertion loss
  • Better spectral efficiency
  • Narrow guardband
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Combline filters

Combline filters can be designed to have bandwidths of 1% to 50% of the centre frequency. Centre frequencies in the range of 100MHz to 20GHz are possible with stopbands extending to 5 times f0 . Wider stopbands are achievable with appropriate resonator loading.
  • Combline bandwidths of 1% to 50% of the centre frequency
  • Interdigital up to 100% bandwidth
  • Contiguous and non-contiguous types available
  • Extended stop bands achievable
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Lumped element filters

Lumped element technology is commonly used in applications where small size is required, especially at lower frequencies where transmission line devices might be excessively large. Both narrowband and broadband designs are available in high pass, low pass, band pass, band stop and multiplexer form.
  • Ideal for moderate to very wide bandwidths
  • Versatile topologies and multiple frequency bands
  • Perfect for applications where size and weight is important.
  • Can be designed for challenging environmental conditions such as high shock and vibration.
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Metal cavity filters

Filtronic has extensive expertise of machined and cast metal cavity filters.
  • Optimised rejection
  • Excellent for quick turnaround
  • Simplified design
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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, low pass and band pass filters
  • High pass and low pass can be cascaded together to form multi octave band pass filters and multiplexers
  • Utilising printed circuit technology
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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 size and weight critical applications
  • Frequency range suitable from 3GHz to 114GHz


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Small cell filters

With the lower power of small cell products, the main drivers to a successful product are compact size, low weight and both high performance and efficiency. The filter has a significant impact on all of these drivers, so it is important to consider these in the technology and design approach of the filters. ‍
  • Miniature high performance filters for 5G
  • Designed to extend the capacity, speed and efficiency of a radio network
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Cross band combiners

Filtronic offers a wide range of cross-band combiners for different scenarios in the infrastructure sharing market. The filters are designed for various combination of 700, 800, 900, 1200, 1800, 2100 and 2600MHz frequency bands.
  • 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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Unveiling the future of E-band

18 June 2024

Filtronic ushers in new leadership era with CEO Nat Edington

15 May 2024

King’s Award for Innovation 2024

7 May 2024

Filtronic launches into the future, securing a Strategic Partnership with SpaceX for Starlink constellation

24 April 2024