Yes, countless antenna professionals have, and TI has a great application note on the basics of PCB antenna design. You probably won't find a design for 433 MHz.
Not an Arduino problem, and the antenna professionals rarely, if ever, look at or post on the Arduino forum.
May I add that the antenna is easy, the network to match the antenna to the transmitter IC is where the trial and error and engineering comes into play.
I'm using Arduino as a base for my project. There are many examples of projects, here and elsewhere, that use the inexpensive 433MHz xmit/rcv option with Arduino. Many people here on these forums are probably doing, more or less, exactly what I'm doing.
I'm not asking how to replace the gasket on my oil pan or how to make a dovetail joint.
I have a Coilcraft kit with appropriate inductors, and I have a set of capacitor wands. I know how to create PI and T resistor impedance pads, but I do not have access to a spectrum analyzer. Does anyone have a tried layout they would like to share?
Don't need a spectrum analyzer. Make a simple RF indicator with a wire antenna, a two diode voltage doubler and a filter cap and and measure the output voltage with your DVM. Tune for peak voltage.
I tried one of the published TI designs, for an 868Mhz PCB antenna, intending it to be a single board TTN\LoRaWAN node.
I copied the dimensions exactly as per the design note, same PCB material.
It was a very poor antenna indeed. Simple bit of wire was heaps better.
It was a very poor antenna indeed
Did that design include components scaled to match the output impedance of the transmitter?
Usually there is an associated transmission line strip that has to be included, with the correct dimensions.
My recollection is that the antenna was apparently designed to be matched to a module with a 50R output, which is what the module I was using should have been.
The end of the balanced line should be impedance matched. The antenna is unbalanced. Care should be taken at the transition to avoid reflection. Reflection could greatly reduce antenna output.
Thank you, EmilyJane. I saw this. As far as I can tell, TI does not provide layout dimension specs or gerbers that I can download.
They do if you get the kit.
You mean buy the kit. Are you sure they'll provide the specs?
Yes
I have calculated an antenna for you, the mmana program for non-commercial use on the network is available, a device for analysis can be bought inexpensively called NanoVNA, there is a small gain relative to the isotropic emitter, go ahead
You know something... I just remembered...I have a Nanovna. Bought it many years ago. Maybe still works.
I think so too )))
PCB 433mhz antenna for reference
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.
