ESP12 - how to improve WiFi signal strength and increase the range of the module?

How do I increase the signal strength of the WiFi ESP12?

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Hello, I need help with the issue of increasing the signal strength between two ESP12 modules.
For this purpose I have purchased the larger 12 dB antenna shown in the picture:

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However, using this larger 12 dB antenna did not increase the signal strength compared to this smaller antenna shown in the photo, in fact even using the 12 dB antenna has less signal strength.
I'll show the tips more closely, maybe some wave matching needs to be applied. Please give me your ideas:

JORGEN1970 wrote:

How to increase signal strength

How much does it currently have?
How much do you owe yourself?

I currently have about - 90 dB , if I had about - 80 dB that would be enough.
Communication outside but basement and 1st floor about 30 to 40 m after obstructs the corner of the block.

Look for a range of amplifiers! I don't know how rich you are?

Doesn't your module have a jumper to select internal / external antenna like the wemos D1 Mini PRO ?

I have a WIFI ESP12 with input for the antenna.

Adam Walko wrote:

Look for the amplifiers on offer! I don't know how rich you are?

On what principle do such amplifiers work , ie do they amplify all signals or just dedicated ones? How does it work?