On which layers of four should the trace antenna be (433mhz)

Our team plan to launch a GPS device for food safety tracking, with a four layers PCB inside. Where should we locate the antenna?

November 14, 2023

Antennas deal with the world outside the device. This would tend to indicate that they should be located on an outside layer.

While it’s easy to say that circuit board substrate material (woven Fiberglas with epoxy binder) is “transparent” to radio signals, a closer look reveals a dielectric constant of 4 as versus a dielectric constant of 1 for free space. This difference will have an effect on the behavior of the antenna (probably not much at 433 MHz), but it’s still not a good idea to bury the antenna under a layer of laminate.

Don’t locate any other conductors on layers below the antenna – just keep them clear.

Oliver Smith

Oliver is an experienced electronics engineer skilled in PCB design, analog circuits, embedded systems, and prototyping. His deep knowledge spans schematic capture, firmware coding, simulation, layout, testing, and troubleshooting. Oliver excels at taking projects from concept to mass production using his electrical design talents and mechanical aptitude.

Oliver Smith

What Others Are Asking

How to handle feedline of bluetooth PCB connected to a 2.4GHz chip antenna?

I’m making a 4 layer PCB prototype that uses a bluetooth mcu connected to a 2.4GHz chip antenna. I’m thinking about what to do with the feedline, whether it should be buried on one of the middle layers, or left on the top layer. To get a 50 ohm line, should I choose top layer with 13-mil width or buried miccrostrip with 7-mild width?

Oliver Smith November 30, 2023

What will go wrong when it is stored at a higher temperature or past its shelf life?

Solder paste should be stored in a refrigerator and it has an expiration date. But what exactly will go wrong when it is stored at a higher temperature or past its shelf life?

Oliver Smith December 13, 2023

Where is the ground located in a PCB?

I am learning to design a multiple layer board for a medical device, and have a question about where the ground should place.

Oliver Smith September 25, 2023

On which layers of four should the trace antenna be (433mhz)

Oliver Smith

Oliver Smith

What Others Are Asking

How to handle feedline of bluetooth PCB connected to a 2.4GHz chip antenna?

What will go wrong when it is stored at a higher temperature or past its shelf life?

Where is the ground located in a PCB?

Read Detailed Advice From Blog Articles