products / Microwave & mmWave Components

Microwave & mmWave Components

The Filtronic component range includes GaN & GaAs amplifiers, MMICs, diplexers and filter products covering a wide frequency range from DC – 110GHz.

GaN Amplifiers

Microwave Filters and Diplexers

mmWave Filters and Diplexers

E-Band Power Amplifier

Ultra High Capacity Data Links

GaN Amplifiers

Microwave Filters and Diplexers

mmWave Filters and Diplexers

E-Band Power Amplifier

Ultra High Capacity Data Links

GaN Amplifiers

GaN technology offers significant performance advantages in the application of point-to-point microwave and backhaul transceivers.


The range of point-to-point backhaul radio links operating in the lower frequency microwave bands can be significantly increased by the addition of high-power booster amplifiers. Using GaN technology, these amplifiers offer excellent power added efficiency over more traditional class A products.

Utilising our expertise and years of experience in design and manufacturing of high-frequency products, Filtronic has developed a family of extremely compact, high-efficiency amplifier modules based on our proprietary GaN power FET technology.

Filtronic GaN amplifiers are manufactured using our in-house high-reliability chip and wire assembly processes. Our GaN power amplifiers offer very high RF power of above 50W, while providing excellent efficiency and superior linearity. Integrated coupled RF output enables pre-distortion and power detection.

Currently, these products are aimed at the traditional long-haul radio bands, 6GHz to 11GHz. However, development is planned to explore the feasibility of our GaN technology to enable cost-effective, increased power solutions at higher frequencies.

Filtronic amplifiers suit multiple applications including RF testing – where high efficiency, high output power and linearity are the key requirements.

Please contact us to enquire about the existing product range or if you would like Filtronic to quote to design and manufacture a product solution.

Microwave Filters and Diplexers

Filtronic has extensive knowledge and expertise in the design, development and production of microwave filters that dates back to 1977.


Our team of highly experienced engineers work with customers to ascertain optimum technologies dependent upon specific filter requirements, e.g. size, response, power handling, insertion loss and rejection.

Core competencies available include metal cavity filters, ceramic, combline, interdigital, lumped element, suspended substrate and thin-film.

Ceramic Filters

Combline / Interdigital

Lumped Element

Metal Cavity

Suspended Substrate Stripline

Thin Film Filters

Ceramic Filters

Combline / Interdigital

Lumped Element

Metal Cavity

Suspended Substrate Stripline

Thin Film Filters

Ceramic Filters

Filtronics unique in-house ceramic facility offers a rapid turn around, ideal for prototyping and proof-of-concept for new designs.


Filter capability includes TE, TEM, TM, Quasi-TM, ceramic combline etc. dependent upon the required filter performance and size.

Metallisation of ceramic parts allow different modes of operation to be achieved, e.g. TEM and TM.

New material development, pressing, machining, firing, grinding and metallisation are processes available to meet the demanding requirements of new ceramic filters.

Combline / Interdigital

Although very similar to cavity 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.

Multiplexers can be formed by coupling band pass filters together at a common transformer junction. Both contiguous and non-contiguous types are available. Diplexers, for example, are often used in applications such as Tx/Rx communications systems, where a common antenna is shared.

In some applications requiring wider bandwidths and where flatter group delay is important, we can use interdigital structures. The electrical and mechanical characteristics are similar to combline but the resonators are longer and are alternately inverted. The longer resonators result in a lower upper stopband frequency.

Lumped Element

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. Various filter prototypes are used combining capacitive or inductive coupling to produce asymmetric or symmetric responses.

Filtronic pays particular attention to the selection of components and the design of the housing so that parasitic resonances and waveguide modes are suppressed to ensure broad, spurious free stopbands.

Metal Cavity

Filtronic Broadband has extensive expertise of machined and cast metal cavity filters. Traditionally supporting the wireless infrastructure business, where typical demands include low loss, tight rejection specifications, high power and low passive interm


Typical products include, band pass and band stop filters, cross-band and in-band combiners for antenna sharing, multiplexers and tunable filters, either factory tuned or field reconfigurable.

All designs are fully modelled prior to release using the latest electrical, mechanical and thermal modelling tools ensuring designs remain compliant over severe temperature ranges.

All filters are 100% tested using Filtronic’s in-house fully automated test suite; recording all RF parameters.

Suspended Substrate Stripline

Suspended Substrate Stripline (SSS) is traditionally a printed circuit technology that can be used for both broadband and narrowband filters; typical frequency range 500MHz to 26GHz.


The wide range of realizable impedance values makes this medium particularly suitable for high pass and low pass filters that can be cascaded together to form broadband band pass filters and multiplexers.

Generalised Chebychev filter prototype designs result in highly selective band edges with low passband loss and high stopband attenuation.

As suspended substrate is a printed technology it exhibits very repeatable performance, and devices can be made with very tight amplitude and phase tracking.

For some higher power applications, rather than use a substrate, solid metal bars are suspended in air forming low PIM filter structures.

Thin Film Filters

Surface mountable thin film filters are available in band pass, band stop, high pass and low pass configurations.


High dielectric constant, low loss substrate enables significant size reduction for space critical applications.

Frequency range suitable from 3GHz to 110GHz.

mmWave Filters and Diplexers

Waveguide diplexer products developed and manufactured to high-end customer specifications for Point-to-Point and Point-to-Multipoint volume applications covering the frequency range from 4 to 110 GHz.


Utilising innovative engineering solutions, Filtronic highly experienced engineers design custom filters and diplexers to exacting performance levels, but implemented in low-cost die-cast or machined fabrication.

Custom software enables highly accurate no tune designs and rapid development lead times. Integration of couplers and isolators supports lowest cost system solutions and flexibility of variants minimising customer logistics.

Products have capabilities, through high levels of integration, to offer cost effective solutions incorporating high-frequency rejection filters to 110GHz, RF loop and isolators as required.

Please contact us if you would like Filtronic to quote for the design and manufacture of a product solution.

Cerus

Cerus, the 71-76GHz boost power amplifier from Filtronic Broadband, delivers market-leading transmit power, enabling extended link distances for high capacity E-band point-to-point radios.


With a compact design incorporating an internal RF power detector and temperature sensor, it can be easily integrated with Filtronic transmitter modules.

  • Supports high order modulation schemes including 256QAM.
  • Demonstrated operation at +30dBm QPSK.
  • Small form factor only 40 x 40 x 47mm.

Ultra High Capacity Data Links

  • Proven technology solution

  • Multi-channel n x 10Gbps

  • Proven High power amplifiers for extended range


Filtronic’s proven technology solutions enable the next generation of ultra-high capacity long-range data links. Extensive knowledge and experience in microwave and mmWave integration ensures that system performance is optimised and size is minimised.

Innovative architectures with a focus on high levels of integration minimise size, weight and power and enable deployment of multi-channel systems in a small envelope.

  • High-power, multi-channel configuration supports >10Gbps in each 2GHz bandwidth.

Flexible system configurations can be optimised to meet customer specific system requirements and applications; for example, ultra-low noise receivers.