Hi, I was wondering if you can use the internal antenna of the Portenta H7
to transmit and receive fm signals.
Anyone knows if it's possible?
What do you mean by, "fm signals"?
That'll be for the BLE/WiFi module - so you'd have to be hacking the internals of that if it is possible!
The datasheet for the BLE/WiFi module is linked from the Portenta page:
If that antenna is designed for 2.5 GHz (wifi) then it will not work as an fm antenna since fm starts at
88 MHz.
You must be confused about what FM means. I am using FM radio right now this very minute at 146.520MHz to talk to a friend across town. You do need a license for that.
FM is a style of modulation. The FM radio band for broadcast stations starts at 88MHz, but you can use frequency modulation on a signal at any frequency.
OP. Check the legality of what you want to do. Transmitting at 2.5GHz has some limitations. You can do just about anything you want at 2.4GHz. I don't know about voice at that frequency. There will be a lot of interference.
Moreover, the "antenna" listed on the data sheet is a "ceramic antenna" which means it is part of the ceramic cover of one of the chips on the board and is internally connected to that chip and has NO external connection. Similar to the on-board antennas on GPS receiver chips.
So, there is NO access to the antenna and you can only use the modulation that the chip offers.
Read the actual data sheets for the board/device.
Does your board have those?
I was thinking he was going to use that antenna in the fm band.
If you're talking about the range you see on your FM receiver in your car, that's the FM broadcast band.
FM is just a type of modulation.
1 Like
Yeah, I know.
What would you connect the internal antenna to? Do you have some unidentified device that needs an antenna and you can't find or make an appropriate antenna for it?
Yes
I am gone!
See ya Paul !