GPS Antenna trace to IPEX in PCB

Using Arduino General Electronics
1

Hi. I am designing a PCB for a RC buggy.
Due to space constraints, I can't just solder a pre-made board. Rather I need to move the components in my own design.

My doubt is, for a module like GY-NEO6MV2
image
Does the trace width/length from RF-IN to IPEX or VCC-RF to IPEX matter? (or both?)
How are the values of the R and L determined in these circuits?

Here is the schematic in question:
image

Here is my current setup, with shielding as recommended here: section 2.1.1

image
image683×697 67.5 KB

Might be a silly question, newbie with antennas here

2

Yes width and lenght matter.
R and L are only needed for active antennas. Are you using an active antenna?

Read ALL of section 2, it has all the information you need.

3

Thank you for the response, will give a better look.

Judging from the schematic and this What is the metallic case on the GPS antenna for? - #6 by HillmanImp, I would guess it is an active antenna

4

Is that the antenna you are using?

5

Definitely, can't open it to confirm, but most of the modules over aliexpress look the same

I have this one at hand: https://it.aliexpress.com/item/1005006408014668.html, will use the bundled antenna (if not all the pieces in the board), with an extension if possible

6

Well section 2 still applies see section 2.5.3
What R and L should be for that particular antenna I have no idea.
If you have the module you show in post #1 you should be able to read the resistor value.
I would also copy the layout on that module

7

image
image767×621 63.3 KB

Here's how I ended up wiring it. Near same as the original module. Thank you for the advice!

8

That looks perfect.
I think the L = 22nH will probably work with any active antenna. It's there to keep the RF from being shorted out by the resistor connected to VCC_RF.

1 Like
9

The piece with the coaxial cable is both the antenna and the receiver. The antenna is called a "patch antenna". There is a circuit board with a bunch of components under the patch antenna. The soldered connection you see is the connection between the antenna and the receiver. We had one come apart in the convection oven and could see the board under the antenna.

1 Like