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We'll talk about the RF chips in this lesson

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RF is the abbreviation of radio frequency

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The RF chip has functions such as signal transmission,

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signal reception, frequency synthesis, and power amplifier circuit

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When we send the messages,

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the radio frequency chip converts the low-frequency local signal into

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a high-frequency radio frequency signal

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and sends it to the antenna in the mobile phone,

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which is converted by the antenna and sent to the base station

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When receiving, it converts the received high-frequency radio frequency signal

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into a low-frequency local signal

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and send it to the baseband CPU for decoding

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The local signal mentioned here refers to the sound signal processed by the sound circuit in the mobile phone,

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which belongs to the low frequency

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RF chip and CPU are used together

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In the physical mainboard,

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there are a large number of components of different colors on the side of the RF chip

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The RF chips used by Qualcomm are WTR series and SDR series,

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which means that its chip models start with WTR or SDR

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The WTR series is used by some early Android phones,

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and the SDR series is the current mainstream

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The RF chip in the picture on the right has many small capacitors next to it,

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and there must no large inductor next to it

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At present, mobile phones using Hisilicon CPUs on the Hisilicon platform

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usually use Hisilicon series RF chips

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For example, this is Hisilicon, which uses Hisilicon RF chips

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Its model is Hi6363

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MTK usually uses the MT series

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For example, in the picture on the right,

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the RF chip model is MT6177W,

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which belongs to the MT series

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Okay, that's it for this lesson