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Armms RF and Microwave Society
Book for the Nov 2018 conference »


Next Conference:

Monday 19th November to Tuesday 20th November 2018 at Wyboston Lakes, Wyboston


Young Engineer Sponsorship: The ARMMS RF & Microwave Society provides sponsorship for young engineers (28 or below) who have had papers accepted for presentation at each meeting. Sponsorship is £100 cash plus free attendance (including conference dinner and overnight accommodation). Potential candidates should identify themselves as eligible at time of submission and state their date of birth. This offer is limited to a maximum of 2 places per meeting.

Best Paper Award: The Steve Evans-Pughe prize is awarded to the best presenter at each meeting. The award is £200 for the best paper and £50 for the runner-up. The prize is sponsored by NI.

If you are interested in submitting a paper for presentation at this conference, please contact the technical coordinator (details below). Papers currently listed below are those already accepted. The deadline for submissions is October 5th. For all other enquiries please email




Wyboston Lakes
Great North Road
MK44 3AL


Avtar Virdee and Bal Virdee
Microwave Technology Ltd

Tel01604 654820


A Dual Channel SMT Packaged PA for 26GHz 5G

Stuart Glynn and Liam Devlin
Plextek RFI

Considerable effort is currently being expended on the development of mm-wave 5G components and systems operating in the key candidate bands. In Europe the Radio Spectrum Policy Group (RSPG) has identified the 26GHz Band (24.25 to 27.5GHz) as the ‘Pioneer Band’ for mm-wave 5G. This article describes the development of a dual channel Power Amplifier (PA) housed in a custom laminate SMT package that covers the full 26GHz 5G band. The PA MMIC was designed by Plextek RFI; it offers a gain of 22dB with an RF output power of 26dBm at P-1dB and a PAE of 30%. The laminate packaged dual band component was developed in collaboration with Filtronic with support from the UK’s Compound Semiconductor Applications Catapult (CSA Catapult). Details of the design, implementation and measured performance of both the MMIC and the dual channel packaged component will be presented.

Asymmetrical Doherty Power Amplifier for 8dB PBO and Dual Band Coverage

Raj Rayit
Saras Technology Ltd

Challenges of using Solid-State Sources for Microwave Cooking and Heating Applications

Kauser Chaudhry
Cardiff University

This paper outlines the challenges of using solid-state sources for microwave cooking and heating applications by characterizing cylindrical cavity resonator  impedance behaviour under variable loading conditions – represented by volumes of water ranging from 50mili-litres to 120mili-litres. Impedance variations due to changes in volume and temperature are captured to highlight hostile loading conditions at device plane,  limiting the use of solid-state sources for commercial applications. A circulator and high power load can be used to protect the device against these hostilities - at the expense of additional cost and reduced available power (due to reflections) to heat the load. The importance of maintaining a satisfactory impedance match between the source and load is studied and presented.

Design of Reconfigurable Power Dividers with Wide Tuning Ranges

Anqi Chen
Liverpool University

This paper presents and investigates a novel two-way power divider design with controllable operating frequencies by adding a pair of capacitors in parallel with the transmission lines in a Wilkinson power divider. This method can either provide a tunable bandwidth by introducing an extra in-band reflection zero, or provide are configurable single operating frequency. Two circuits are fabricated to validate the method. For the bandwidth tunable power divider, the added zero- reflection frequency is sensitive to the capacitors so that the bandwidth can be tuned by altering the capacitance of the capacitors. Measured results indicate that the device has a 15-dB fractional bandwidth varying from 0 to 93%.For the center frequency tunable power divider, the single operating frequency also has high sensitivity to the capacitance. The measured tunable center frequency range is f Max: f Min = 4.67:1

Power Handling of Strongly-Coupled Striplines

Dave Andrew
Vectawave Ltd

Strong coupling in stripline is readily achieved by the use of partial to complete broadside coupling configuration.  The requirement for high even mode impedance leads to narrow lines, when compared with attached transmission lines, and hence to reduced RF current for acceptable temperature rises.  The presence of the coupled line, which also carries RF power, adds extra thermal load.

Thermal analysis may be performed, by way of analogy to electrical circuits, to predict maximum power handling in a given configuration.  The example of a 2.45GHz equal division coupler demonstrates power limitation due to the coupler is considerably lower than the 50Ω lines that connect to it.

It is shown too that the contribution of dielectric loss is diminished in the coupled line.


Clive Alabaster
White Horse Radar Ltd


Companies booking two or more delegate places are able to take part in the commercial exhibition that accompanies the conference. Please note: there is a maximum of 20 exhibition tables at each meeting, these are offered on a first come basis. Booking two delegate places does not guarantee an exhibition space, please email to check availability and reserve and exhibition space.


The society would like to thank  NI for sponsoring the November 2018 meeting:


Contributions are invited with an emphasis on RF and microwave design, research, testing and associated subjects. An oral presentation will be made at the meeting and a written paper will be required for publication in the society digest, which is distributed to delegates at the meeting. Prospective speakers are requested to submit a title and a short abstract to the technical coordinator (see above) as soon as possible.

Click here to view our Guidelines for Authors
Click here to view our Publication Release Form

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