Product Announcements

May 2014
Tel: +44 1751 476600
Fax: +44 1751 473519

A1 Microwave Ltd., is a leading UK designer and manufacturer of waveguide and coaxial filters, diplexers and waveguide assemblies for satcoms, radars, instrumentation and fixed communications microwave links. A1 employs world-beating design and simulation software to produce "right first time" designs with optimum performance. Standard and custom-designed products are offered from 100MHz to 50GHz.

X Band Filter for TWTA and Magnetrons

x band filterA1 Microwave has recently developed the PB1751WA for radar applications. This filter is placed at the output of a travelling wave tube amplifier or magnetron and it provides suppression of any spurious and harmonic signals prior to transmission.  It operates around 9.4 GHz and provides over 60 dB of rejection from 6 to 9 GHz and from 10 to 20 GHz. The typical insertion loss is 0.4 dB and it can handle peak power levels of up to 30 KW. We can provide filters to meet specific frequency requirements as well as custom mechanical solutions to comply with any difficult size and weight constraints.

Filters for Wireless Links

The PB1629WA is an ultra-compact waveguide output assembly for a Ku band satcom power amplifier. This assembly covers a passband of 13.75 to 14.5 GHz and includes a bandpass filter, a harmonic filter, a forward power monitor and flexible waveguide output section. This has an overall insertion loss of less than 0.4 dB. Custom versions or with different input/output locations are possible.

K & KA Band Filters

For K and Ka band satcom frequency converters A1 Microwave has a broad range of both standard and custom designed filters. The new part PB1691CB shown above covers a passband from 19.2 to 19.7 GHz and provides rejection of greater than 60 dB below 18.25 GHz and better than 25 dB rejection above 20 GHz. The insertion loss is 1 dB and the filter has coaxial K connectors.

C Band Power Combiner

Following on from the X band Magic Tee combiner described in our last newsletter A1 Microwave has now released its new C band power combiner model PB1722WA. This is used to combine two C band high power amplifiers, to boost the out signal level. This is based on waveguide hybrid technology and covers the C band uplink frequency range from 5.85 to 6.725 GHz. The combiner has a very closely matched phase response to enable efficient power combing. It includes a high power load and a detection coupler.

Waveguide to Coax Adaptors

A1 Microwave has a broad range of standard waveguide to coaxial adaptors. These cover C, X, Ku, K and Ka band frequency ranges. We maintain stocks which enables fast delivery of parts. Shown in the photo above is our new PB1706WT. This adaptor covers the frequency range from 18 to 22.5 GHz and has a precision K connector at the output. The length is only 30mm.

Standard Waveguide Components

A1 Microwave provides many waveguide components. These include straight sections, bends, twists, flexibles and transitions. In the Waveguide Manufacturing section of our website ( there are data sheets for these standard components with full part number build up capability to fully define your requirement. We keep stocks of various waveguide sizes to enable standard products to be built and despatched promptly.

We will also be pleased to supply waveguide sections and components on a build to print basis or form, fit and function replacements for any existing or obsolete waveguide runs or filters. We can work from detailed drawings or can measure up from any existing parts and reproduce rugged and reliable products.


17 - 20 June, 2014  |  CommunicAsia 2014 Singapore