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PRFI has a growing library of video tutorials on various aspects of microwave, mmWave and MMIC design. They feature examples of past design IP that we can use to help develop custom products for our clients with reduced risk and timescales.

Videos can be viewed by clicking the individual links below, or by visiting our YouTube channel.

PRFI Overview

A short video summarising PRFI’s capabilities for IC and module design at microwave and mmWave frequencies.

Noise Power Ratio (NPR) is an important linearity measurement that is used in many RF and microwave system designs. This paper by Richard Cavanagh, presented at the ARMMS RF & Microwave Society conference in April 2024, describes the simulation of NPR in Keysight ADS and measurement of the CML Micro CMX90A702 and CMX90B701 using Rohde & Schwarz test equipment. Two methods are described, and good agreement is seen between measurement and simulation.

Noise Power Ratio (NPR) is a useful linearity measurement for many RF and microwave applications. This video demonstrates how to measure the NPR of a 28GHz 0.4W GaAs MMIC designed by PRFI. A Rohde & Schwarz SMW200A is used to generate the wideband noise power signal at the input and a FSW spectrum analyser is used to obtain accurate measurements of the noise power ratio at the output.

Following on from our previous video on how to measure Third Order Intercept Point (IP3), this video demonstrates how PRFI speeds up our IP3 measurements through Python scripting. IP3 is a key linearity metric for RF, microwave and mmWave amplifiers and other components – please see our previous video for an introduction: How to Measure IP3.

A good thermal camera is useful to have in an RF and microwave lab. PRFI invested in a high-quality unit from Testo to support our high power GaN amplifier module development work. We have found it a very useful diagnostic and analysis tool to support our microwave and mmWave module development activity.

Third Order Intercept Point (IP3) is a key metric for RF, Microwave and mmWave amplifiers and other components. This video explains what IP3 is, and demonstrates how to measure it with a real example amplifier (the CMX90B702 from CML Micro) in PRFI’s lab.

Richard Cavanagh speaking at the ARMMS RF & Microwave Society conference in Oxford, UK in April 2023.

Liam Devlin speaking at the ARMMS RF & Microwave Society conference in Wyboston, UK in November 2022.

Dave Collins describes how the supply voltage can be used as a variable in the design and optimisation process, which allows the improvement of PA performance at power back-off.

The Advantages of Star Mixers Compared to Quad Diode Rings as Double Balanced Microwave Mixers

Liam Devlin speaking at the ARMMS RF & Microwave Society conference in Oxford, UK in April 2022.

5G Modulation Simulation of 28GHz 5G PA in Keysight ADS

Rob Smith describes how to use Keysight ADS to simulate the performance of a 28GHz power amplifier using 3GPP 5G modulation.

FEM Simulation on Keysight ADS

Rob Smith describes how to use the FEM simulator in Keysight ADS to simulate microwave package transitions and wire bonds. The key to success is to co-design the IC and the package, in order to optimise the performance of the packaged device rather than the IC on its own.

Technical Discussion on mmWave Packaging

Liam Devlin explains the challenges of packaging devices at mmWave frequencies, and the options and techniques available to achieve the best results.

An SMT Packaged 4-Channel mm-Wave PA for 5G Applications

Liam Devlin describes a 4-channel mmWave PA for use in 5G applications, presented at the November 2019 ARMMS conference

A fully-integrated 3.5GHz single-chip GaN Doherty PA for sub-6GHz 5G

Rob Smith describes a fully-integrated 3.5GHz single-chip GaN Doherty PA for sub-6GHz 5G at a recent ARMMS conference

Dual channel SMT packaged PA for operation in Europe’s 26GHz Pioneer Band for 5G

This video describes the development of a dual channel PA housed in a custom laminate SMT package that covers the full 26GHz 5G band.

Power amplifier MMICs for mmWave 5G

Liam Devlin speaking at the 2018 Interlligent RF Design Seminar. The roll-out of 5G promises a step change in wireless data-rates; one of the main strategies to facilitate this will be a move to mm-wave frequencies

The Design and Evaluation of a Plastic Packaged Single-Chip FEM for 28GHz 5G

Liam Devlin speaking at the April 2018 meeting of the ARMMS RF and Microwave Society

Cost-Effective Input Matched GaN Transistor for S-band Radar Applications

Robert Smith of PRFI speaking at the April 2018 meeting of the ARMMS RF and Microwave Society

The Design of a Dual-band PA for mmWave 5G

Technical tutorial video describing the design, layout and performance of a dual-band power amplifier (PA) MMIC, capable of electronically switching its operating band between the 26GHz and 32GHz 5G bands.

mmWave Components and Technologies for 5G Applications

Liam Devlin presents on mmWave components and technologies for 5G applications, at a recent Interlligent UK conference held in Cambridge, UK.

GaN PA Design, Hints and Tips

Helen Duncan interviews Rob Smith on useful tips for GaN Power Amplifier Design

An X-band MMIC PA designed on a UMS GaN Process using Keysight ADS

In this video Stuart Glynn describes the design of an X-band GaN PA using a GaN process from UMS, on keysight’s ADS simulator

The Advantages of Custom MMIC Design

Liam and Helen Duncan present the second of our “Technical Discussions” series on the advantages of custom MMIC design.

Technology Challenges and Emerging Trends for mmWave 5G

Liam and Helen Duncan present the first of our “Technical Discussions” series on the future use of mmWave technology in 5G

A 28GHz, 4-channel Phase Adjustable Power Amplifier IC for 5G front-ends

Liam presents the design of a 4-channel Power Amplifier IC with in-built phase control, for 5G front-end applications

Understanding 2nd order intermods in Amplifiers

awd_ip2In this video Andy explains intermod products in amplifiers. In particular, 2-tone OIP2 is explained, and compared to 1-tone second harmonic intercept point.




The Design of a Broadband MMIC Frequency Doubler

Awd_x2In this tutorial Andy describes the design of an octave-bandwidth double-balanced MMIC frequency doubler using a quad-diode bridge, and two types of planar Marchand baluns




Simulating Distortion of QAM-256 Signals by GaN PAs

Ahr_Mod1This video is a follow on from Stuart’s video on the 15GHz Point to point GaN MMIC PA. In this talk Tony puts a complex modulation scheme through the GaN PA and simulates distortion, eye-diagrams & EVM etc. using MATLAB.



15GHz Point to Point GaN PA MMIC

Sfg_GaNPA7In this video Stuart explains the design of a compact GaN PA MMIC for use in Linear Point to Point applications at 15GHz.





A Guide to the Design of Laminate PCBs at Microwave Frequencies

LMD_PCB2This is a recording of a recent paper presented by Liam at the UK ARMMS conference.





Design of Planar Spiral Baluns

Awd_Balun2Planar spiral baluns are often used in MMIC mixers, for example.
In this video tutorial Andy describes their design and layout, and shows their use in a double-balanced diode mixer.




Broadband (2-18GHz) GaN PA MMIC Design

Sfg_GaNPA1GaN technology is well suited to the realisation of Power Amplifiers. In this video tutorial Stuart describes the design, layout and simulation of a 2-18GHz GaN PA MMIC using Keysight ADS.



Design and Simulation of Broadband Switches

LMD_spdt1Liam Devlin describes a design methology for broadband
PHEMT MMIC switches using Keysight’s ADS simulator





RFOW Calibration using an ISS Substrate

GGap_rfow1raham Pearson shows how to perform a RF-On-Wafer
calibration using an Impedance Standards Substrate from
Cascade Microtech, & then moves on to measure a GaAs MMIC amplifier.



MMIC Mixer Design and Simulation

Awd_Mix1Andy Dearn demonstrates a mmWave double-balanced
switching FET mixer using harmonic balance simulation.





Microwave VCO Design using Keysight ADS

Awd_Osc1Andy shows how to design high frequency oscillators using small- and large-signal techniques.





Simulating rms Phase Error of Integrated Phase Shifters using Keysight ADS

Sfg_PhS1Stuart Glynn describes rms phase error in microwave phase shifters.





Designing mmWave Integrated Filters using Keysight ADS

Awd_Filt1Andy discusses integrated (MMIC) filters on Keysight’s ADS simulator.