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4G LTE Signal booster 2019 / amplifier circuit using LM386

পাঁচমিশালি, বিজ্ঞান ও প্রযুক্তি 4 weeks ago 21 Sep, 2019 at 7:15 am 73
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4G LTE Signal booster 2019 / amplifier circuit using LM386

This is just an experiment to test if it is possible to amplify / boost 4G signal for the HuaWei-E5577 modem so that i can enjoy decent internet speed consistently. The circuit is very simple driven by LM386 amplifier IC and two antenna. One is the receiver antenna another the transmitter antenna powered by 5 Volt USB PC usb power supply.
The complete component is as follow
1 x project box for casing
1 x 4700 uF Electrolyte capacitor
1 x 1000 uF Electrolyte capacitor
2 x 4.7K Resistors
2 x Antennas with SMA male connectors
1 x USB female port
2 x SMA female connectors
The output of the result is very interesting – although there is no sign of signal indicator increase on the Huawei-E5577 modem but the internet connection looks faster than usual and it is very consistent. Despite of having 1 bar 4G signal the internet still capable of loading YouTube videos very smoothly and serve the internet normally.
I understand that this amplifier is not capable of delivering 4G signal but the RF amplification via the LM386 seems to have effect on the HuaWei-E5577 modem. Noted that the amplification doesn’t seem to work on normal smart phone device. Not sure what exactly the cause.
Anyway now i can enjoy consistent internet speed that have been poor for the past 9 years. It’s different this time.
NOTE: Some people may not believe this works – but please take be reminded i do not post something that doesn’t work. And at the very least it works for me.

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4G Amplifier / booster circuit schematic diagram
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credit: howtodosteps

4 weeks ago

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3 Comments

    Abdullah sk
    September 21, 2019 at 7:19 am

    use around 16 v or 25 v is good enough…don’t go less because the LM386 only use 5 volt to 9 volt…u can you high voltage cap but not efficient

    Reply
    Abdullah sk
    September 21, 2019 at 7:19 am

    Search for tank circuit a combination of capacitor and resistor in parallel.. The voltage of capacitor for high frequency doesn’t need to be so high for electrolyte polarized can be 15 volt or the ceramic 50volt is fine

    Reply
    Abdullah sk
    September 21, 2019 at 7:24 am

    Q: What if i am making anteena using copper coils, how many turns i should give to anteena for input and output for getting an amplified and boosted signal for 3g/2g/4g network. Can you help me out with this fast, please.

    ANS: Coil won’t be anygood but there is one antenna that is proven of the years that provide a good reception to 2G / 3G and 4G network it is called Yagi Antenna. To make it will take time but you could buy it from china cost only few dollars like $5 to $10…This will be the ultimate antenna to use in network.

    Reply

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