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In this lesson, we will talk about the description of the radio frequency receiving
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and transmitting circuits of Redmi K50 in the circuit diagram
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Open Xinzhizao intelligent query system and open the schematic diagram of Redmi K50
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The Redmi K50 is the same as Xiaomi,
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the first two or three pages of the general drawings describe the RF circuit
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The first page describes the antenna
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Its 4G is the BL frequency band, and the BL frequency band belongs to the middle frequency band
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Then this LB is a low frequency band, and it is a diversity reception
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Low frequency is not what we are looking for
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This is the diversity reception of N77 and N78, it is 5G, and it is not what we are looking for
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Antenna 7 isn't what we're looking for either
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Antenna 8 is also 5G, and it's not what we're looking for either
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It's for WIFI, and it's not what we're looking for
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This is GPS and WIFI 2.4G
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Antenna 3 is for the diversity of the medium and high frequency bands,
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and there is also antenna diversity for the medium and high frequency bands of 5G
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They are not what we are looking for
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By looking for the first page, we want to find the main receiver of the mid-high band
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ANT5 LTE is 4G medium and high frequency band
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PM is the main set
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The frequency band used in the medium and high frequency bands of 5G has GSM diversity reception
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This is the 4G channel antenna we are looking for, and it is also a medium and high frequency band antenna
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B1 it belongs to the middle frequency band
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That's all for this lesson