What is EVM?

Posted on May 27, 2017November 25, 2017 by Peter King

EVM or Error Vector Magnitude is a measure of how the measured constellation points deviate from the ideal locations. EVM(%) = sqrt(P_error / P_reference) * 100 P_error... Read More

LNA Design Principles

Posted on May 26, 2017November 25, 2017 by Peter King

Here follows a basic tutorial on LNA design described by example using ADS. The steps involved usually follow the sequence: Define LNA requirements Select device(s) Find good bias... Read More

DOORS

Posted on May 22, 2017November 25, 2017 by Peter King

IBM’s DOORS software is a great tool to capture and manage product requirements, test requirements and test evidence for large systems. I have used it extensively on an... Read More

Using Linecalc

Posted on February 8, 2017November 25, 2017 by Peter King

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,... Read More

What is IP3, IP2?

Posted on February 7, 2017November 25, 2017 by Peter King

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... Read More

What is PAPR?

Posted on February 5, 2017November 25, 2017 by Peter King

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... Read More

Cascaded NF and IP3

Posted on January 1, 2012November 25, 2017 by Peter King

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... Read More

RF Consultant – Surrey UK

Category: Tutor