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25 ppm MAX2870

Why ‘PPM’ matters in the GHz bands!

No matter what frequency you work on, a term called “ppm” always follows. Whether you deal with the good old HF band or you work at the Gigahertz band, “ppm” defines how accurate your frequency would be. Simply speaking, PPM stands for Parts per million.

Make your own Phased Matched cables with NanoVNA

Phase matched cables come handy when dealing with phasing elements of an antenna or even when you want to deliver differential signals. There was a time when making phase matched cables meant use of expensive vector network analyzers. With the NanoVNA on your desk, you

psa4-5043+ gain

Measuring noise figure using Gain Method

For those into radio astronomy would know the significance of having ultra-low noise figures. Lower the noise figure, the more sensitive your receiver becomes. Noise figure is a unit of measure that tells us how much noise, for example, your amplifier is adding to the

Transmitting SSB audio with LimeSDR Mini

There are so many new RF devices coming out these days which has pushed the envelope the technology where a common person can access it. In one of the previous posts, I demonstrated how LimeSDR mini can be used like a RF source. This time,

Accurately measuring cable length with NanoVNA

Update: Now you can plot the impedance vs. distance/time plot. Click here to learn the concept. Original Post: Having a VNA opens up so many possibilities. Just last week, I reviewed the nanoVNA and found to be an interesting device to have. Having handled expensive