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That is incorrect
you have been told you need a Geiger tube for gamma rays as you are dealing with particles, NOT a RF or EMF emission
X-ray detection is difficult, I am not sure a Geiger tube will do that … I know my one definitely doesn't
Geiger tubes are for Alpha, Beta and gamma detection...
You seem to have completely misunderstood the OP
A 150W FM transmitter is not micropower by any stretch of the imagination
The OP is trying to get his highly illegal, hence PIRATE, transmitter up and running and transmitting 150W illegally WILL get the OP into trouble
You were the only one...
They don't
3G cellular uses spread spectrum, so it's quite difficult to pick up a signal from it as the TX signal aka RF power is spread over a wide bandwidth
4G uses OFDMA multi-carrier transmission, which again can be difficult to get a strong signal from because of the way the signal is...
You say it is for transmission for 1 metre or less so there is no need for anything complex. A wire or a track on a PCB would be all that is required
Dave
have a look at all the examples here …….
https://www.bing.com/images/search?q=monopole+antenna+on+groundplane&FORM=HDRSC2
one example
so the coax core goes through the ground plane to the monopole and the braid of the coax connects to the ground plane
There is NO considerable amount of voltage received.
The voltage induced into the harvesting antenna is uV (microvolts)
it isn't useful for any practical purposes
Yes, that is correct, but when put into a Yagi, as the OP is doing, its impedance drops significantly
the 200 Ohm figure is quite a common figure used and a 4 : 1 balun to get to 50 Ohms
That said, I have read comments in days gone by that spacings and numbers of elements significantly affect...
Re: RF for Wireless Camera Flash Trigger
do you really want to reinvent the wheel ??
there are already many 2.4GHz remote flash units available out there and most of them would be much cheaper and better looking in smaller housing than
what you are likely to be able to build
just one...
you haven't given any info with which to give a meaningful answer to your question
do you have schematics for this planned transmitter and receiver ?
what sort of power levels were you planning ?
do you have specific test equipment to check frequency, power and other essential factors ?
if it is...
Re: questions to SATCOM antennas
because that is how you get the required gain
the higher in freq you go, the smaller the antenna needs to be to get the same amount of gain
not sure ion the second question
if all you want to do is transmit the signal around the house, then you just want a 1/4 wave wire whip soldered onto the Antenna pad on the output of the transmitter
a 1/4 wave at 108 MHz = 300 / 108 = 2.78 metres
2.78 / 4 = 0.695 metre x 0.98 (for the velocity factor) = 0.681 metre length...
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