Using the NanoVNA to measure standing wave ratio (SWR) of an antenna.

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Kylie Lamoree, Motus Biologist for Bird Conservancy of the Rockies, explains how to use the NanoVNA to measure the standing wave ratio (SWR) of an antenna.
In this video, Kylie describes how to calibrate the NanoVNA to measure from 432MHz to 436MHz, saves that calibration, and measures the SWR of a Laird YS4306 yagi antenna. This antenna is used on our Motus stations to detect tags that transmit at 434MHz (manufactured by Cellular Tracking Technologies).
You can follow the same steps to calibrate the NanoVNA to measure from 164MHz to 168MHz, and save that calibration in a different save slot. This will allow you to measure the SWR of an antenna on your Motus station intended to detect tags transmitting at 166.380MHz (manufactured by Lotek Wireless, Inc.). Saving the two different calibrations allows you to easily move back and forth between the two frequencies to measure multiple antennas at your Motus station.
For more information about the NanoVNA, visit their official website here: nanovna.com/
For more about the Motus Wildlife Tracking System, check out the Motus website here: www.motus.org/

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Опубликовано:

25 июл 2022

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Комментарии : 24

@kgrant67 Год назад

Just bought one and watched several videos by big ham radio channels, and this was the clearest and most concise demo I've seen. Everything I needed and nothing I didn't. Thanks!

@howardholt6206 Год назад

Agreed

@martinst.24. Месяц назад

Loved the voice too

@PickedItMate 7 дней назад

I like the speed of your commentart - my adhd thanks you.

@kenmcmullan9330 3 месяца назад

Perfect introductory video. Didn't assume any prior knowledge, but at the same time without talking to me like I'm a spongecake. Thank you! PS - Did you know about connecting the two ports together for the "through" calibration? Hope this helps.

@TheGeeMan Год назад

WOW! Great video! You explain things in easy-to-understand simple terms, and not in Klingon.

@o2bnov0307 Год назад

Thank you very much! I have seen several RU-vid videos, but nothing has been as clear and concise are your presentation. I’m going to be using it for my home-brew HF ham antennas.

@joeltangunan Год назад

I just got my own NanoVNA and trying to learn how to use it. Very straightforward. Thank you for this video.

@StinzePlant 11 месяцев назад

During your calibration I observed at marker 3:48 in your video that you directly pressed the Calibrate button after the CAL button. Between those two the RESET button has to be pressed to empty old calibration data. For a 1 port calibration you may skip the Isolation- and Thru button. After you removed the CAL load from CH0 I saw a swr value of 1.37 at the cursor. Where was that value coming from? Because with an Open (or nothing connected) at CH0 this value should be very high (infinite theoretically). So the yellow trace had to be on top of the display. I hope this helps.

@US5NAR 6 месяцев назад

One of the best tutorials - short and clear! Thanks!

@HamRadioCrusader Месяц назад

That was INCREDIBLY helpful!! Thank You!

@davydacounsellor Год назад

Thanks for the upload

@andreacontini8388 Год назад

Wow you saved me with your "shiny for short" I was confusing the load with it and I couldn't make it work

@ab7zv 5 месяцев назад

Thanks - this was quite helpful.

@astroEnthusiast1 Год назад

Very nice, I'm wondering can this test be performed through an LMR 400 coax cable with an LNA & BPF connected, no antenna. Would that still provide an accurate SWR or would I need to add in a 50 Ohm terminator on the input end of the LNA (from the antenna)? Or should this test get performed with the LNA assembly connected to the antenna? This is for a Radio Astronomy telescope project.

@Jack-wh7qk 5 месяцев назад

Fantastic video and well thought out. I got a Nano VNA for Xmas, but now confused as to how I delete stored data that I no longer want...thanks.

@BobSouthDakota Год назад

The best video I've seen on this subject! Thank you

@Index-o1234 Месяц назад

How do you know which SWR reading is good or bad for the frequency range you choose to save? I can only assume you are connecting the Nano to the wire that connects directly to your antenna outside with no other equipment attached to get it's SWR?

@ltlt6117 8 месяцев назад

Hello! It's my question that how we can test an antenna for a bipolar monopulse uwb signal for example if that signal has a 5ns width and 100khz repetition..What is the frequency that I have to use as start and stop on nanovna to measure my antenna parameters?????