Microwave Perfromance and Applications of Metal Sintered Components

Lead Research Organisation: CARDIFF UNIVERSITY
Department Name: Sch of Engineering


RF and MW Devices produced by Additive layer manufacturing (ALM). The effective surface resistance is dominated by fine surface details such as texture and the electrical quality of the surface. This project will investigate the optimisation of the ALM process for the production of 3D surfaces for low microwave surface resistance, including the effects of build orientation and build chamber parameters. It will then apply these principles in the production of novel, 3D waveguide-based components which could not otherwise be manufactured. These will be first tested as transmission components and then be used to form simple microwave components such as bandpass filters.


10 25 50

Studentship Projects

Project Reference Relationship Related To Start End Student Name
EP/R511882/1 01/10/2017 30/09/2022
1912817 Studentship EP/R511882/1 01/10/2017 30/06/2021 Richard Gumbleton
Description Two novel novel measurement techniques have been developed and tested.
Isotropic Xy plane measured for surface resistance in AlSi10Mg.
Variety of post processing options for use on additive layer manufacturing, for low surface resistance.
Novel thermal characterisation of ALM of operational microwave components.
Exploitation Route Contribute toward the uptake of ALM parts into aerospace and space applications for microwave components. Further work to be done on exploiting the novel geometries available through use of ALM.
Sectors Aerospace, Defence and Marine,Digital/Communication/Information Technologies (including Software),Electronics

Title Fractional frequency shift data for a additive manufactured cylindrical microwave resonant cavity between 6 - 450 K, for the assessment of thermal expansion coefficient 
Description The relatively poor microwave electrical conductivity of additive manufactured AlSi10Mg results in many applications relying on the use of post processing in the form of silver plating. For space & satellite application, extreme thermal cycling can cause expansion of the component and the silver plating at different rates. In addition to this, extreme thermal expansion of the component can lead to changes in operating frequency. Therefore, assessment of the thermal properties of AlSi10Mg is of particular importance for it utilisation in practical applications. This dataset consists of an oven ramp (300-450K) and a fridge ramp (300-6K). cooling_6-300K.exl contains three columns (Temperature in Kelvin, Frequency in Hz and Quality Factor) for the fridge ramp. heating.tdms is the data for the oven ramp. The file contains data tabs for five resonant frequency modes (Mode 0= TM010, Mode 1= TM110, Mode 2= TM210, Mode 3=TM020 and Mode 4=TM310) The data used in publication was Mode 0, Mode 2 and Mode 4. The data for each mode consists of two temperature measurements in Celsius, time in seconds, resonant frequency in Hz, bandwidth in Hz and insersion loss in dB. 
Type Of Material Database/Collection of data 
Year Produced 2019 
Provided To Others? Yes  
Impact None as yet. 
URL https://research.cardiff.ac.uk/converis/portal/detail/Dataset/75533614?auxfun=%E2%8C%A9=en_GB