Is it possible to build an homemade mobile signal amplifier?

[martino.iemmolo.2]

Good morning makers
The internet is full of fake and unclear projects about mobile signal amplification, so I was wondering if is really possible to build an homemade 4G amplifier circuit maybe using some operational amplifiers.
I'm just a beginner but I love to experiment with different components and face new challenges.
I managed to recycle some op-amps (such as LM358N) from old electronic boards but I don't think is enough powerfull to amplify a mobile signal.
This would be my first project with wireless comunications.
Thanks in advance.

 

[bertus]

Hello,

It is not possible to amplify the 4G signals with a LM358.
The LM358 is made for audio amplifiers, the kHz range and not RF wich is the 4G signals with frequencies upto 2100 MHz.
See this page for more info:

Cellular Frequency Bands Chart | Cell Phone Frequencies

Understand cellular frequency bands for strong signals. Powerful Signal offers insights into major carriers' bands like Verizon, AT&T, T-Mobile & more.

powerfulsignal.com

Bertus

 

[Delta Prime]

4G or 1 2 3 4 5G homemade signal boosters are illegal you need a license and you're not going to get one I could see for experimental purposes knowledge base there are many boosters online ready available that have been tested and conform to compliance where they're sold and they will not interfere with other devices or networks my advice is to purchase these readily available units there are relatively inexpensive and tear it apart then you know what you're getting into. Heck that's what I did. And I'm a happy camper now.

 

[kellys_eye]

It's all moving to wifi calling nowadays.

 

[Delta Prime]

It's all moving to wifi calling nowadays.

No! It's not they just flooded the market with product the IEEE 802.11-a,b,c,d(Alphabet Soup) 2.4 to 5 Gigahertz Spectrum is already crowded. Nowadays if you look next week it is obsolete.
Options are limited to consumers but not for those in the know.
What did the mother tomato say to the baby tomato's after they were just stepped on...."ketchup"!
Reference: Oxford American English Unabridged Dictionary.

 

[Delta Prime]

I'm talking orthogonal bi-directional full duplex transmit receive repeater amplifiers. How Sweet It is.

 

[crutschow]

What did the mother tomato say to the baby tomato's after they were just stepped on...."ketchup"!

The way I heard that was "On a walk together what did the mother tomato say to the baby tomato when he was lagging behind"?

 

[Delta Prime]

The way I heard that was "On a walk together what did the mother tomato say to the baby tomato when he was lagging behind"?

Don't be silly! Tomatoes don't have legs.....

 

[Delta Prime]

I believe post number three nailed it.
Do you like tomato juice?
Welcome to Maker Pro!

 

[Delta Prime]

Wow! what happened ?some blonde posted a better worded explanation than I did in post 3 and I just reminded her of that.
Well heck I like tomato juice I just squished myself normal for me though.

 

[bidrohini]

Do you mean mobile signal booster? Here I have found a tutorial. Don't know how much it works: https://www.instructables.com/DIY-2G3G4G-Wireless-Cell-Phone-Signal-Booster/

 

[bertus]

Hello,

Unfortunately sites like instructables and youtube have a lot of projects that will not work.

Bertus

 

[martino.iemmolo.2]

Thank you very much for all the answers.
Ipotetically speaking in order to build an experimental mobile booster I would have to use an operational amplifier capable of working with frequencies of 2100 MHz, right?
I'm currently searching for components like that, do you have any suggestion about the model of op-amp I could use?

 

[Delta Prime]

Ipotetically speaking in order to build an experimental mobile booster I would have to use an operational amplifier capable of working with frequencies of 2100 MHz, right?

Wrong. Hypothetically. Aluminum foil make very good hats.

Homemade Cell Phone Signal Booster: 4 Genius DIY Hacks

What do your old iron hangers and kitchen aluminum foil have in common? They can help with your weak cell signal. Everyday household items have fascinating properties that enable them to improve cell signals. Aluminum foil, for example, can reflect cell signals to your device or spaces within...

www.wilsonsignalbooster.com

 

[Alec_t]

I'm currently searching for components like that

Good luck finding one. But did you read the legality warning in post #3 ? Illegal acts are contrary to the site's Terms & Conditions which you signed up to.

 

[davenn]

I'm currently searching for components like that, do you have any suggestion about the model of op-amp I could use?

you wont find one, you need an RF amplifier
considering you are breaking the forum rules ( as @Alec_t stated) and you also have no idea of
RF electronics, I will close this thread