Blog Archives

There is no Loss in Free Space Path Loss. And it doesn’t change with frequency

Whether a professional or amateur, one of the first things we learn about propagation is that lower frequencies propagate better. Or propagation loss increases with frequency. In this post I will make the case that Free Space Path Loss really

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Impedance Matching with QUCS Studio and VNA

Intro In my last blog post I alluded to the fact that you could take s1p touchstone files generated by nanoVNAsaver and use this to automatically calculate/simulate a matching network in QUCSstudio. This could be used to quickly design antenna

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Getting Started with the NanoVNA -Part 3 – PC Software

VNA Saver – PC Software There is now a variety of PC based software that is available to use with your nanoVNA. In this post, I will be demonstrating NanoVNASaver(version 0.0.9). This is developed by Rune Broberg and is fully

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Getting Started with the NanoVNA -part 2

In the previous post, we got up to speed with the basics of what a VNA is and how to run a basic calibration. In this post we will look at configuring the traces and formats. Note on Charging –

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Getting Started with the NanoVNA -part 1

This post now includes some edits based on user feedback[in green italic] What is a VNA? The Vector Network Analyser is an essential piece of test equipment that no RF engineer should be without. If you have previously worked with

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Spiral Antenna – Part 3 – Results and Suckers

The original aim for this antenna was to be a general purpose antenna that worked down to 400MHz. The results are now in and I am really pleased with them. The antenna was tested by AntennaTestLab in a full anechoic

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Spiral Antenna – Part 2 – Modelling and Simulation with OpenEMS

Now tested by AntennaTestLab. For now see results here Electromagnetic simulation software can be very expensive. While some software is cheaper, it often comes with either technical or artificial limitations. There are however a couple of free alternatives. NEC2 –

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Spiral Antenna – Part 1

Why? My original Palm Tree Vivaldi Antenna has proved amazingly popular. Much more so than I originally intended. The design aim for this was primarily for it to be small and portable. When deciding what to do next I decided

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Reconfigurable Ultra-Wideband Antenna Array Kit – part 2 (Spacing)

Why Spacing Matters Firstly, the antenna array I am designing is a fixed in-phase array. Hence we assume that the total path length from each antenna to the single input/output connection are the same length. This makes the design and

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Ultra-Wideband Antenna Lab Measurements

My Vivaldi Antenna was recently tested by Antenna Test Lab who offer an excellent professional antenna testing facility. Antenna Test Lab are able to provide customers with full 2D/3D antenna measurement using their anechoic antenna testing chamber.

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