The Project
The original project was created by Beric Dunn (K6BEZ) for Pacificon 2013 which was coded around a PIC processor. Arduino was considered and even portions of a project started, but never coded beyond a serial connection back to a PC. This is a completed rendition of the Arduino version based on the PIC version.
The Project
You can find the original plans for this antenna analyser at https://sites.google.com/site/k6bezprojects/antenna-analyser. Originally the Arduino was considered too expensive so the PIC device was used, but since then, you can find relatively cheap Arduino compatible devices for around $4 on Ebay. I used the Arduino Nano, the nice part about using the Arduino is the on-board usb connection which allows instant programming. Most PIC devices require a separate programming device. I coded this device around the original PIC design.
I coded the device based on the original PIC design with a little bit of a twist. On start, the device will start up ready to run a 1 to 30mhz sweep at 100 steps and give you the lowest SWR and the corosponding frequency. Two buttons control the device, button A will scroll through the available tests and button B will execute the test. There is definitely room for improvement, but this will give you a working antenna anaylser. Enjoy.
Downloads
You will find the schematics and sketch listed below. Feel free to change, edit and share these designs but I ask that you keep the original designer K6BEZ in the comments.