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Radio-frequency circuit and method for reducing harmonic interference of radio-frequency circuit

A radio frequency circuit and circuit technology, applied in the field of communication, can solve problems such as not taking amplifier harmonics into account, increasing the radio frequency stability of mobile phones, etc.

Inactive Publication Date: 2017-11-24
PHICOMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the devices are integrated and fixed on the same circuit board, which can reduce the burden of mobile phone RF debugging and increase the stability of mobile phone RF; in addition, the first power amplifier is used to amplify the power of the 2G signal sent by the transceiver chip and output it to the main set RF switch. The second power amplifier is used to amplify the power of the 3G or 4G signal sent by the transceiver chip, output it to the duplexer, and then output it to the main set RF switch, and process the 2G signal, 3G signal and 4G signal according to the situation, and more targeted processing signal, but there are also cases where harmonics are not accounted for by the amplifier itself

Method used

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  • Radio-frequency circuit and method for reducing harmonic interference of radio-frequency circuit
  • Radio-frequency circuit and method for reducing harmonic interference of radio-frequency circuit
  • Radio-frequency circuit and method for reducing harmonic interference of radio-frequency circuit

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as figure 1 As shown, this embodiment provides a radio frequency circuit, and the circuit includes:

[0035] RF transceiver module 100, matching module 200, shunt switch 300 and filtering module 400;

[0036] One end of the matching module 200 is connected to the radio frequency transceiver module 100 , and the other end is connected to the filtering module 400 through the shunt switch 300 .

[0037] The radio frequency transceiver module 100 is used for transmitting and receiving radio frequency signals;

[0038] The matching module 200 is used to adjust the impedance of the radio frequency signal to reduce the energy loss of radio frequency signal transmission. When the radio frequency signal generated by the radio frequency transceiver module 100 is not up to standard, that is, when the frequency is not particularly high, the matching module 200 can be used to reduce the impact of echo The influence of signal quality and available power to ensure the transmiss...

Embodiment 2

[0044] Such as figure 2 As shown, the difference between this embodiment and the previous embodiments is that this embodiment provides a radio frequency circuit that avoids mutual interference between signals.

[0045] The circuit further includes a combiner switch 500 connected to the filter module 400 and the branch switch 300 respectively. Combiner switch 500 turns the previous branch into a combined circuit, and then controls the different gates or disconnections of the combined switch 500 to make the signal flow to the same component more orderly and stable; that is, to ensure that only All the signals flow through, so that there will be no interference between the signals when the circuit is combined, resulting in poor signal transmission effect;

[0046] In this circuit, the combination switch 500 with gating function is used to change the split into a combination in order to be compatible with most of the current mobile phones; because the current mobile phones are a...

Embodiment 3

[0051] Such as image 3 As shown, the difference between this embodiment and Embodiment 2 is that this embodiment provides a more detailed radio frequency circuit.

[0052] The first gate terminal 310 of the shunt switch, the filter module 400 and the first gate terminal 510 of the combiner switch are sequentially connected; The two gate terminals 520 are connected. It makes the flow direction of the radio frequency signal clearer, and the signals will not interfere with each other.

[0053] The matching module 200 includes a π-type matching circuit. The elements in the π-type matching circuit are composed of inductive elements and capacitive elements, and the π-type matching circuit includes a main circuit element 210 and two branch circuit elements, and the two ends of the main circuit element are connected to the power amplifier 600 and the shunt circuit respectively. In the switch 300, in addition, one end of the two branch circuit elements is respectively grounded, and...

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PUM

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Abstract

The invention discloses a radio-frequency circuit and a method for reducing harmonic interference of the radio-frequency circuit. The circuit comprises a radio-frequency transceiving module, a matching module, a shunt switch and a filter module; one end of the matching module is connected with the radio-frequency transceiving module, and the other end is connected with the filter module via the shunt switch. The method comprises the following steps: S10, detecting the frequency of signals; and S20, selecting a signal channel according to the frequency detection result of the signals. The radio-frequency circuit can recognize signals and transmit the signals in different channels, and can further filter more harmonic interference generated therein, thus greatly reducing harmonic power no matter on conduction or coupling, and solving the problem of electromagnetic compatibility stray.

Description

technical field [0001] The invention relates to the communication field, in particular to a radio frequency circuit and a method for reducing harmonic interference of the radio frequency circuit. Background technique [0002] Radio frequency (Radio Frequency, RF) refers to radio frequency current, which is a high-frequency alternating electromagnetic wave with long-distance transmission capability, and its frequency range is between 300KHz and 300GHz; radio frequency circuits are high-frequency circuits used to generate radio frequencies. The main application fields of radio frequency circuits include satellite communications, personal mobile communications (GSM, 4G, etc.), wireless local area networks, aviation communications, optical fiber communications, television and radio broadcasting, etc., which shows that they are widely used. The radio frequency circuit is basically composed of passive components (capacitors, inductors, resistors), active devices and passive networ...

Claims

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Application Information

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IPC IPC(8): H04B1/525H04B1/401
CPCH04B1/401H04B1/525
Inventor 郭万荣
Owner PHICOMM (SHANGHAI) CO LTD
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