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miegl / PiFmAdv

Advanced Raspberry Pi FM transmitter with RDS encoding
GNU General Public License v3.0
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Best antenna to increase range? #18

Closed Brandon4466 closed 6 years ago

Brandon4466 commented 6 years ago

Are there any suggestions for an antenna to use with this? Other's experiences?

I have found something like this: https://www.amazon.com/dp/B01HTDKAWS/ref=cm_sw_r_cp_apa_JsbxAbGW04SRV

Would something like this work? Does anyone know how you would connect something like this best to the GPIO?

Basically just the best way to boost the radius. Any suggestions would be great! What do you guys use for an antenna?

Thanks!

sm3ulc commented 6 years ago

If you plan to anything else than a piece of string for short term use you should add a LPF such as the one below.

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F282734932208

With that said the stick will work ok. I tried a diamond x200 and got some 500m range with RDS.

// David

Den 15 jan. 2018 03:58 skrev "Brandon4466" notifications@github.com:

Are there any suggestions for an antenna to use with this? Other's experiences?

I have found something like this: https://www.amazon.com/dp/B01H TDKAWS/ref=cm_sw_r_cp_apa_JsbxAbGW04SRV

Would something like this work? Does anyone know how you would connect something like this best to the GPIO?

Basically just the best way to boost the radius. Any suggestions would be great! What do you guys use for an antenna?

Thanks!

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ghost commented 6 years ago

Be aware that driving an inductive load (such as a filter) directly could damage the Pi's output hardware. I'm currently working on a simple circuit that should be provide a nicer load for the Pi and filtering. The plan is to turn it into a hat.

miegl commented 6 years ago

You can get a decent range with just a simple dipole. But even then the range won't be very good. That's because the power output of the RPi is low. With a good radio reciever you will be able to listen pretty far away, but other recievers will have problem picking up the signal even at a small distance. It would be possible to design a hat with both filter (band pass) and small amplifier.

Niall7459 commented 6 years ago

I use a wire about 60cm long, It works quite well can pick up good range in a car. but no so much with other recievers, also try placing the Pi upstairs that increased my range by 2x and also try finding a frequency that is clear from interruption because I found this reduced the distance.