Using Linecalc

Linecalc is a useful utility that is bundled with Keysight ADS, and is used to estimate the performance of pcb transmission lines.  To demonstrate what it can do,…

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What is IP3, IP2?

IP3, or third order intercept point is a way of stating how non-linear a system is.  For example, often seen on datasheets, it is an easy metric to…

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Teaching Again!

RF Circuit and Systems Design 3-7 July 2017 I shall be teaching RF power amplifiers and PA linearisation again. RF Circuit and System Design

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What is PAPR?

PAPR or Peak to Average Power Ratio is a way of characterising how far the waveform envelope peak exceeds the waveform mean. It can be represented by a…

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SystemVue Demo

SystemVue is a physical (PHY) layer simulation tool with simulated hardware in the loop.  Channel coding, modulation, the RF, the channel, demodulation and channel decoding can all be…

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USB Microscope Demo

We bought this new usb microscope on Amazon.  £29 including shipping (2012 prices).  Seems like China government subsidise small businesses in China?  Wish they did that here.  It…

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Printed Filter Accuracy

We have excellent results with designing printed filters and other structures using Keysight ADS. The simulation results were very close to the measured results: Note the passband insertion…

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Phase Noise Modelling

The plots above show Mathcad predictions and measured phase noise for a typical PLL. AWT’s Mathcad PLL software designs and models synthesisers with great accuracy. Loop filter values,…

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Cascaded NF and IP3

One of the calculations that is required when designing a receiver or transmitter line-up of circuit blocks is cascaded Noise Figure (NF) and cascaded Third Order Intercept Point…

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Teaching Fun!

I occasionally provide lectures and teaching to budding RF engineers.  Since 2011, on Surrey University’s short course RF Circuits and Systems, I have been teaching RF Power Amplifiers…

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