Wifi signal amplifier

[Keenan Laws]

I am trying to build a wifi signal amplifier and was wondering if a 741 op amp would work for this ??

 

[thylacine1975]

No. Not even remotely.

The 2.4 GHz WiFi band of frequencies are *orders of magnitudes* higher than where the 741 could do anything useful. (And as a consequence of a personal loathing of the 741, I'll also add: "...assuming the 741 could do anything useful at low frequencies anyway"

Although *some* traditional voltage feedback op-amps can be applied to RF amplification tasks, their noise/gain/phase shift characteristics are pretty average - and beyond a GHz, even the best are looking pretty rubbish next to even a mediocre MMIC or general purpose gain block (like https://www.richardsonrfpd.com/Pages/Product-Details.aspx?productId=684800).

Designing a WiFi booster (i.e. a combination of power amplifier, low noise front end and Tx/Rx switching) is a non-trivial RF engineering exercise. Unless you really love this stuff, hitting Ebay is more likely to yield a better solution.

 

[Audioguru]

The lousy old 741 opamp is 45 or 46 years old. It cannot properly amplify low frequency audio signals because its datasheet shows that it has trouble above only 9kHz.
2.4GHz is MUCH higher than 9kHz.

 

[D.A.(Tony)Stewart]

I found a 741 for you that does 3 GHz 20dB gain.

https://www.hittite.com/products/view.html/view/HMC741ST89E

But I think the better question is the one not asked!

This my code for why do you need better WiFi signals?

What do you have for range, antenna , Loss Of Signal(LOS) issues? RSSI or Rx levels?

 

[Audioguru]

I found a 741 for you that does 3 GHz 20dB gain.

https://www.hittite.com/products/view.html/view/HMC741ST89E

Its material seems to be ground-up blue LEDs.

 

[D.A.(Tony)Stewart]

Just Infrared LED material, GaAs

My son refuses to use a microwave oven for cooking because of GHz frequency. I replied just don't over cook it. Infrared heat in conventional oven is in TerraHz range.