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small transmitters

danadak

Feb 19, 2021
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Some questions :

1) What frequency ?
2) What modulation will be used ? AM, FM, Digital......?
3) Power level desired ?
4) Will you use an antennae ?


Regards, Dana.
 

Alec_t

Jul 7, 2015
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If you make it, how will you ensure it complies with legal requirements?
 

bertus

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Nov 8, 2019
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Hello,

What network tower are you talking about?
What kind of signal is used?

Bertus
 

fluffyweird

Jul 9, 2023
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cell phone provider network tower that could be a 3g or 4g ... signals used could be gsm signaling or just like the ones inside a phone


I'm trying to build a small phone and turnsout I need a small transmitter
 

AnalogKid

Jun 10, 2015
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You also need a receiver, plus a huge amount of computing power, plus a SIM card reader or equivalent storage of user account information. I think the physical size of the transmitter portion of a cell phone is a relatively small problem to solve. The world is awash in billions of dead cell phones. Find one and disassemble it to see how the pro's do it.

ak
 

bertus

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Nov 8, 2019
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Hello,
Yes! how about 7.9 mm. Single chip RF transmitter You can stack support circuitry,probably 20 mm hight.
That is not what he wants.
The shown chip is for the ISM bands.
He wants a transmitter for 3G or 4G.

Bertus
 

Delta Prime

Jul 29, 2020
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Hello,

That is not what he wants.
The shown chip is for the ISM bands.
He wants a transmitter for 3G or 4G.

Bertus
I answered his very first question!
Besides I'm poor I have a very slow phone you cannot display all of them at once too much memory that I do not have. (insert joke here)
 

fluffyweird

Jul 9, 2023
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You also need a receiver, plus a huge amount of computing power, plus a SIM card reader or equivalent storage of user account information. I think the physical size of the transmitter portion of a cell phone is a relatively small problem to solve. The world is awash in billions of dead cell phones. Find one and disassemble it to see how the pro's do it.

ak
thanks G thank you so much
one more general question tho, do you happen to know transmitters that only send signal to the network tower that could fit in a 10mm diameer tube? I really am anxious in fitting it in there
 

Delta Prime

Jul 29, 2020
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For kicks and giggles let's say you accomplished your goals
Once the cell tower receives this signal, it will transmit the signals to a switching center this is where your transmission ends . Protocols are in place for hobbyists or terrorists do not gain access,to be able to connect to either another
mobile phone or to a telephone network. You are towing the line if you are in the United States that would be a matter of national security and you will disappear if you are successful.
For educational purposes or for a mind experiment I could see why you would ask such questions.
 

fluffyweird

Jul 9, 2023
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we
For kicks and giggles let's say you accomplished your goals
Once the cell tower receives this signal, it will transmit the signals to a switching center this is where your transmission ends . Protocols are in place for hobbyists or terrorists do not gain access,to be able to connect to either another
mobile phone or to a telephone network. You are towing the line if you are in the United States that would be a matter of national security and you will disappear if you are successful.
For educational purposes or for a mind experiment I could see why you would ask such questions.
well I live in some state in Africa and let's just say I have full access to the cell service provider and I'm trying out something cool to stop illegal arms travelling in my nation and neighboring countries .... I can't say the technicallity but I need a transmitter that can just signal the network tower and I could Id
 

Delta Prime

Jul 29, 2020
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Why don't you say that in the beginning!!!
I don't like dancing around.
But I do like getting my hands dirty. What part of Africa!I can get you up and running. But we got to go private PM me.
 
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