NRF24 Range
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Thank you for the explaination :+1:
Can you please confirm whether the last link provide or not an acceptable solution?
Any down-side?
@ben999 It should work ok, but may require a bit of tweaking and experimentation to get the correct length. Effectively it is a quarter wave either side but the PCB track also forms part of that antenna so not just a straight calculation.
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Thank you for the explaination :+1:
Can you please confirm whether the last link provide or not an acceptable solution?
Any down-side?
@ben999 Ooops. PS - orientation of the antenna must be the same for send and receive, usually vertical. Do not mix polarisations it will attenuate signal strangth. Have no idea if the board itself would disrupt signal but would play safe and have the antenna end facing intended direction of receive.
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@ben999 Ooops. PS - orientation of the antenna must be the same for send and receive, usually vertical. Do not mix polarisations it will attenuate signal strangth. Have no idea if the board itself would disrupt signal but would play safe and have the antenna end facing intended direction of receive.
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@ben999 I have used that di-pole mod on a few nodes now and have found it to make a reasonable increase in range, considering the cost.
As @zboblamont has said alignment and orientation also play a part as does providing a clear line of sight where possible.
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i'm bilding this right now: http://www.qsl.net/eb4eqa/bt_yagi/bt_yagi.htm
i tell you what is the increment of range in the next weekend ...
i have one of temp sensors under a water solar panel and the aluminium from the frame get me crazy because that sensor lose many of the sent reads to gw. i will finish that yagi antenna and solder that to my nrf24 and i hope signal increase performance.
in my house (i dont have neighboard les than 80m with wifi signal and noise from other routers or any king of 2.4ghz signals ) i can send a door sensor signal(from my entrance gate) by 50m and 1 wall . that one have this antena alredy on tx:
http://martybugs.net/wireless/collinear.cgi
i'm a arduino fan .Even sometimes don't undestanding how to use it :P
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i'm bilding this right now: http://www.qsl.net/eb4eqa/bt_yagi/bt_yagi.htm
i tell you what is the increment of range in the next weekend ...i have one of temp sensors under a water solar panel and the aluminium from the frame get me crazy because that sensor lose many of the sent reads to gw. i will finish that yagi antenna and solder that to my nrf24 and i hope signal increase performance.
in my house (i dont have neighboard les than 80m with wifi signal and noise from other routers or any king of 2.4ghz signals ) i can send a door sensor signal(from my entrance gate) by 50m and 1 wall . that one have this antena alredy on tx:
http://martybugs.net/wireless/collinear.cgi
@Tmaster A yagi at this frequency is going to be fun building without a GDO, but good luck, have fun... Buil a backfire Yagi and quads in my young HAM days (many moons ago), the quads were way easier. Why did you not try relocating the antenna as a simple dipole on a coax from the board hence avoiding the obstacle frame? Seems like total overkill for ca 50m, but hey it's all fun I guess....
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@zboblamont said in NRF24 Range:
overkill for ca 50m,
overkill for this ebay nrf24L01+? in real life they don't have this range without modifications. 1 wall ..and its done
i'm a arduino fan .Even sometimes don't undestanding how to use it :P
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@zboblamont said in NRF24 Range:
overkill for ca 50m,
overkill for this ebay nrf24L01+? in real life they don't have this range without modifications. 1 wall ..and its done
@Tmaster Sorry if I was not clear, your problem as you described it is primarily obstructed signal path. The PCB antenna for sure is low gain but relocating the node antenna to a give clear line of sight is more important than the effective radiated power. Relocating with a decent dipole would dramatically increase gain, as would adding a reflector. Unlike the previous example of directly adding quarter waves to the PCB to make a dipole, using coax to remote the antenna brings it's own issues. A bazooka balun is a simple enough solution to incorporate, but never done one at these frequencies.
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of corse that a clear path its always better that change what already is made. but i only change the antenna when im in a "hole". On that case i cant move my tx sensors so i have to increse power. i hope with a "mini yagi" i can redirect the signal in one direction insted ominidirectional antena. on gw i`m using an old laptop antenna with good results
i'm a arduino fan .Even sometimes don't undestanding how to use it :P
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of corse that a clear path its always better that change what already is made. but i only change the antenna when im in a "hole". On that case i cant move my tx sensors so i have to increse power. i hope with a "mini yagi" i can redirect the signal in one direction insted ominidirectional antena. on gw i`m using an old laptop antenna with good results
@Tmaster I am not doubting the principle of increasing effective radiated power by way of relocating the antenna, or improving the radiation lobe in a set direction. The additional gain is important with weak signals at both send and receive ends, but at 50m it should not be an issue at these frequencies unless there are major attenuations to the signal. I have to guess you already have a dipole at the receiver ?
