CN111355500B - Method for adjusting output power - Google Patents
Method for adjusting output power Download PDFInfo
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- CN111355500B CN111355500B CN202010091541.5A CN202010091541A CN111355500B CN 111355500 B CN111355500 B CN 111355500B CN 202010091541 A CN202010091541 A CN 202010091541A CN 111355500 B CN111355500 B CN 111355500B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
Abstract
The application discloses radio frequency circuit, method, wireless communication equipment of adjustment output power, this radio frequency circuit are including the first power amplifier, time division switch, wave filter, transmission switch, matching circuit and the SRS switch that connect gradually, transmission switch still connects first antenna, the SRS switch is connected second antenna, third antenna and fourth antenna, and radio frequency signal passes through first power amplifier enlargies, and the radio frequency signal of enlargies loops through time division switch the wave filter with transmission switch reaches respectively first antenna perhaps matching circuit, matching circuit adjustment input extremely the radio frequency signal's of SRS switch power improves the transmitting power of second antenna, third antenna and fourth antenna.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a radio frequency circuit, a method for adjusting output power, and a wireless communication device.
Background
With the continuous development of mobile wireless communication technology, 5G mobile technology has matured and is practically applied. Unlike the previous generations of mobile communication technologies, 5G always needs to implement four simultaneous receptions at a single mobile terminal in order to achieve high download rates, thereby increasing the download rates. Four-path receiving needs four independent antennas, performance of the four antennas is inconsistent in mobile terminal devices such as mobile phones, the four antennas need terminal transmitting power to achieve uplink, the four antennas need terminal transmitting signals to become Sounding Reference signals (Sounding Reference Signal SRS) to achieve uplink to a base station, and channel quality detection and estimation, beam management and the like can be conducted. The switching antenna transmitting function of the sounding reference signal SRS is a necessary option of China Mobile communication group in 'Chinese Mobile 5G Scale test technology white paper _ terminal', and the SRS mainly aims to ensure the quality and parameters of 4 channels by measuring 4 antenna uplink signals of a terminal by a base station, and then carry out beam forming of a downlink large-scale multiple input and output (MIMO) antenna array aiming at the 4 channels according to channel reciprocity, so that the downlink 4 x MIMO obtains the best data transmission performance.
Disclosure of Invention
The invention aims to provide a radio frequency circuit, which improves the detection precision of channel quality.
The application discloses radio frequency circuit includes: the radio frequency signal passes through the first power amplifier to be amplified, the amplified radio frequency signal sequentially passes through the time division switch, the filter and the transmitting switch to respectively reach the first antenna or the matching circuit, the matching circuit adjusts the power of the radio frequency signal input to the SRS switch, and the transmitting power of the second antenna, the third antenna and the fourth antenna is improved.
In a preferred embodiment, the matching circuit comprises a capacitor, an inductor and/or a transmission line.
In a preferred embodiment, the matching circuit includes a first capacitor, a first inductor, a second capacitor, a second inductor, a first selection switch, and a second selection switch, wherein the first capacitor and the second inductor are connected in series between the transmission switch and the SRS switch, the second inductor is connected between a node between the first capacitor and the first inductor and a ground terminal, the first selection switch is connected between the second inductor and the ground terminal, the second capacitor is connected between a node between the first inductor and the SRS switch and a ground terminal, and the second selection switch is connected between the second capacitor and the ground terminal.
In a preferred embodiment, the radio frequency circuit further includes a second power amplifier, an input terminal of the second power amplifier is connected to the time division switch, and an output terminal of the second power amplifier is connected to the first transceiver.
In a preferred example, the radio frequency circuit further includes a second transceiver, a third transceiver, and a fourth transceiver, and the second transceiver, the third transceiver, and the fourth transceiver are respectively connected to the SRS switch.
Another aspect of the present application also discloses a method for adjusting output power, including:
amplifying the radio frequency signal by a power amplifier;
the amplified radio frequency signal sequentially passes through a time division switch, a filter, a transmitting switch, a matching circuit and an SRS switch, wherein the transmitting switch is connected with a first antenna, and the SRS switch is connected with a second antenna, a third antenna and a fourth antenna;
and adjusting the power of the radio-frequency signal input to the SRS switch through the matching circuit, and improving the transmitting power of the second antenna, the third antenna and the fourth antenna.
In a preferred embodiment, the matching circuit comprises a capacitor, an inductor and/or a transmission line.
In a preferred embodiment, the matching circuit includes a first capacitor, a first inductor, a second capacitor, a second inductor, a first selection switch, and a second selection switch, wherein the first capacitor and the second inductor are connected in series between the transmission switch and the SRS switch, the second inductor is connected between a node between the first capacitor and the first inductor and a ground terminal, the first selection switch is connected between the second inductor and the ground terminal, the second capacitor is connected between a node between the first inductor and the SRS switch and a ground terminal, and the second selection switch is connected between the second capacitor and the ground terminal.
In a preferred example, the switching off of the first selection switch and/or the second selection switch is controlled to adjust the power of the radio frequency signal input to the SRS switch.
The application also discloses wireless communication equipment, and the wireless communication equipment adopts the radio frequency circuit.
Compared with the prior art, the method has the following beneficial effects:
in the application, the power of the radio-frequency signal input to the SRS switch is adjusted through the matching circuit, and the transmitting power of the second antenna, the third antenna and the fourth antenna is improved, so that the transmitting power of the second antenna, the third antenna and the fourth antenna is close to the transmitting power of the first antenna, and the detection precision of the channel quality is improved.
The present specification describes a number of technical features distributed throughout the various technical aspects, and if all possible combinations of technical features (i.e. technical aspects) of the present specification are listed, the description is made excessively long. In order to avoid this problem, the respective technical features disclosed in the above summary of the invention of the present application, the respective technical features disclosed in the following embodiments and examples, and the respective technical features disclosed in the drawings may be freely combined with each other to constitute various new technical solutions (which should be regarded as having been described in the present specification) unless such a combination of the technical features is technically infeasible. For example, in one example, the feature a + B + C is disclosed, in another example, the feature a + B + D + E is disclosed, and the features C and D are equivalent technical means for the same purpose, and technically only one feature is used, but not simultaneously employed, and the feature E can be technically combined with the feature C, then the solution of a + B + C + D should not be considered as being described because the technology is not feasible, and the solution of a + B + C + E should be considered as being described.
Drawings
Fig. 1 is a schematic diagram of an rf circuit according to an embodiment of the invention.
Fig. 2 is a schematic diagram of an improved rf circuit in accordance with an embodiment of the present invention.
FIG. 3 is a schematic diagram of a matching circuit according to an embodiment of the invention.
Fig. 4 is a flow chart of a method for adjusting output power according to an embodiment of the invention.
Detailed Description
In the following description, numerous technical details are set forth in order to provide a better understanding of the present application. However, it will be understood by those skilled in the art that the technical solutions claimed in the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
One embodiment of the present application relates to a radio frequency circuit, a circuit diagram of which is shown with Reference to fig. 1, and the radio frequency circuit includes a power amplifier 101, a time division switch 103, a filter 104, a transmission switch 105, and an SRS (Sounding Reference Signal) switch 106. The radio frequency input signal RFin is amplified by the power amplifier 101, passes through the time division switch 103 and the filter 104, then passes through the transmission switch 105 to the port of the transmission antenna ANT1, or passes through the SRS switch 106 to reach the reception antennas ANT2/ANT3/ANT 4. The inventors of the present application have found that the SRS switch 106 has loss, so that the transmission power of the radio frequency signal at the antenna ANT2/ANT3/ANT4 has loss of about 1dB, and therefore, the SRS signal power transmitted by the antenna ANT2/ANT3/ANT4 is lower than that of the antenna ANT1 by about 1dB, which may affect the accuracy of the channel quality detection.
In order to improve the accuracy of channel quality detection, the present application discloses an improved rf circuit, a schematic diagram of which is shown with reference to fig. 2. The radio frequency circuit includes: the antenna comprises a first power amplifier 202, a time division switch 203, a filter 204, a transmission switch 205, a matching circuit 207 and an SRS switch 206 which are connected in sequence, wherein the transmission switch 205 is further connected with a first antenna ANT1, and the SRS switch 206 is connected with a second antenna ANT2, a third antenna ANT3 and a fourth antenna ANT 4.
In a preferred embodiment, the radio frequency circuit further includes a second power amplifier 202, an input terminal of the second power amplifier 202 is connected to the time division switch 203, and an output terminal thereof is connected to the first transceiver RX 1.
In a preferred example, the radio frequency circuit further includes a second transceiver RX2, a third transceiver RX3 and a fourth transceiver RX4, and the second transceiver RX2, the third transceiver RX3 and the fourth transceiver RX4 are respectively connected to the SRS switch 206.
The radio frequency signal RFin is amplified by the first power amplifier 201, the amplified radio frequency signal sequentially passes through the time division switch 203, the filter 205 and the transmission switch 205 to reach the first antenna ANT1 or the matching circuit 207, respectively, the matching circuit 207 adjusts the power of the radio frequency signal input to the SRS switch 206, and the transmission power of the second antenna ANT2, the third antenna ANT3 and the fourth antenna ANT4 is increased.
In a preferred embodiment, the matching circuit 207 includes a capacitor, an inductor, a transmission line, or any combination thereof, and adjusts the impedance of the branch in which the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4 are located in the rf circuit through the combination of the capacitor, the inductor, and the transmission line, so as to adjust the inductor, the transmission line, or any combination thereof, and adjust the transmission power of the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4 in the rf circuit through the combination of the capacitor, the inductor, and the transmission line.
In a preferred embodiment, the schematic diagram of the matching circuit 207 is shown in fig. 3. The matching circuit comprises a first capacitor 301, a first inductor 302, a second capacitor 304, a second inductor 303, a first selection switch 305 and a second selection switch 306, wherein the first capacitor 301 and the second inductor 302 are connected in series between the transmission switch 205 and the SRS switch 206, the second inductor 303 is connected between a node between the first capacitor 301 and the first inductor 302 and a ground terminal, the first selection switch 305 is connected between the second inductor 303 and the ground terminal, the second capacitor 304 is connected between a node between the first inductor 302 and the SRS switch 206 and the ground terminal, and the second selection switch 306 is connected between the second capacitor 304 and the ground terminal.
Another aspect of the present application also discloses a method of adjusting output power, the flow chart of which is illustrated with reference to fig. 4. The method comprises the following steps:
in step 401, amplifying the radio frequency signal RFin by the power amplifier 201;
in step 402, the amplified radio frequency signal passes through a time division switch 203, a filter 204, a transmission switch 205, a matching circuit 207 and an SRS switch 206 in sequence, the transmission switch 205 is connected with a first antenna ANT1, and the SRS switch 206 is connected with a second antenna ANT2, a third antenna ANT3 and a fourth antenna ANT 4;
in step 403, the matching circuit 207 adjusts the power of the rf signal input to the SRS switch 206, so as to increase the transmission power of the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT 4.
In a preferred embodiment, the matching circuit includes a capacitor, an inductor and/or a transmission line, and adjusts the impedance of the branch in which the second antenna ANT2, the third antenna ANT3 and the fourth antenna ANT4 are located in the rf circuit through a combination of the capacitor, the inductor and the transmission line, so as to adjust the inductor, the transmission line or any combination thereof, and adjusts the transmission power of the second antenna ANT2, the third antenna ANT3 and the fourth antenna ANT4 in the rf circuit through a combination of the capacitor, the inductor and the transmission line.
In a preferred embodiment, the matching circuit includes a first capacitor, a first inductor, a second capacitor, a second inductor, a first selection switch, and a second selection switch, wherein the first capacitor and the second inductor are connected in series between the transmission switch and the SRS switch, the second inductor is connected between a node between the first capacitor and the first inductor and a ground terminal, the first selection switch is connected between the second inductor and the ground terminal, the second capacitor is connected between a node between the first inductor and the SRS switch and a ground terminal, and the second selection switch is connected between the second capacitor and the ground terminal.
In a preferred example, the step of adjusting, by the matching circuit, the power of the radio frequency signal input to the SRS switch further includes: controlling the first selection switch 305 and/or the second selection switch 306 to turn off adjusts the power of the radio frequency signal input to the SRS switch 306. In this embodiment, for example, the first selection switch 305 may be turned on, the second selection switch 306 may be turned off, the second selection switch may be turned on, the first selection switch may be turned off, the first selection switch and the second selection switch may be turned off simultaneously, or the first selection switch and the second selection switch may be turned on simultaneously, so as to adjust the electrical impedance of the matching circuit connected in the radio frequency circuit in series, thereby adjusting the output power of the SRS signal, so that the transmission power of the second antenna, the third antenna, and the fourth antenna is close to the transmission power of the first antenna, and the detection accuracy of the channel quality is improved.
Another embodiment of the present application further discloses a wireless communication device, where the wireless communication device uses the above radio frequency circuit, and includes the above first antenna, second antenna, third antenna, and fourth antenna. The wireless communication devices to which embodiments of the present application relate may include electronic devices or network devices, which may be various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices linked to wireless modems having wireless communication capabilities, as well as various forms of user equipment, mobile terminals, terminal devices, and the like.
It is noted that, in the present patent application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, same element in a process, method, article, or apparatus that comprises the element. In the present patent application, if it is mentioned that a certain action is executed according to a certain element, it means that the action is executed according to at least the element, and two cases are included: performing the action based only on the element, and performing the action based on the element and other elements. The expression of a plurality of, a plurality of and the like includes 2, 2 and more than 2, more than 2 and more than 2.
All documents mentioned in this specification are to be considered as being incorporated in their entirety into the disclosure of the present application so as to be subject to modification as necessary. It should be understood that the above description is only a preferred embodiment of the present disclosure, and is not intended to limit the scope of the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of the present disclosure should be included in the scope of protection of one or more embodiments of the present disclosure.
In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
Claims (10)
1. A radio frequency circuit, comprising: the radio frequency signal passes through the first power amplifier to be amplified, the amplified radio frequency signal sequentially passes through the time division switch, the filter and the transmitting switch to respectively reach the first antenna or the matching circuit, the matching circuit adjusts the power of the radio frequency signal input to the SRS switch, and the transmitting power of the second antenna, the third antenna and the fourth antenna is improved.
2. The radio frequency circuit of claim 1, wherein the matching circuit comprises a capacitor, an inductor, a transmission line, or any combination thereof.
3. The radio frequency circuit of claim 1, wherein the matching circuit comprises a first capacitor, a first inductor, a second capacitor, a second inductor, a first selection switch, and a second selection switch, wherein the first capacitor and the first inductor are connected in series between the transmit switch and the SRS switch, the second inductor is connected between a node between the first capacitor and the first inductor and a ground, the first selection switch is connected between the second inductor and the ground, the second capacitor is connected between a node between the first inductor and the SRS switch and a ground, and the second selection switch is connected between the second capacitor and the ground.
4. The radio frequency circuit of claim 1, further comprising a second power amplifier having an input connected to the time division switch and an output connected to the first transceiver.
5. The radio frequency circuit of claim 1, further comprising a second transceiver, a third transceiver, and a fourth transceiver, the second transceiver, the third transceiver, and the fourth transceiver being respectively connected to the SRS switch.
6. A method of adjusting output power, comprising:
amplifying the radio frequency signal by a power amplifier;
the amplified radio frequency signal sequentially passes through a time division switch, a filter, a transmitting switch, a matching circuit and an SRS switch, wherein the transmitting switch is connected with a first antenna, and the SRS switch is connected with a second antenna, a third antenna and a fourth antenna;
and adjusting the power of the radio-frequency signal input to the SRS switch through the matching circuit, and improving the transmitting power of the second antenna, the third antenna and the fourth antenna.
7. The method of adjusting output power of claim 6, wherein the matching circuit comprises a capacitor, an inductor, a transmission line, or any combination thereof.
8. The method of adjusting output power of claim 6, wherein the matching circuit comprises a first capacitor, a first inductor, a second capacitor, a second inductor, a first selection switch, and a second selection switch, wherein the first capacitor and the first inductor are connected in series between the transmit switch and the SRS switch, wherein the second inductor is connected between a node between the first capacitor and the first inductor and a ground, wherein the first selection switch is connected between the second inductor and the ground, wherein the second capacitor is connected between a node between the first inductor and the SRS switch and a ground, and wherein the second selection switch is connected between the second capacitor and the ground.
9. The method of adjusting output power according to claim 8, wherein controlling the first selection switch and the second selection switch to be turned off adjusts power of a radio frequency signal input to the SRS switch.
10. A wireless communication device, characterized in that a radio frequency circuit according to any of claims 1-5 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010091541.5A CN111355500B (en) | 2020-02-13 | 2020-02-13 | Method for adjusting output power |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010091541.5A CN111355500B (en) | 2020-02-13 | 2020-02-13 | Method for adjusting output power |
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| CN111355500A CN111355500A (en) | 2020-06-30 |
| CN111355500B true CN111355500B (en) | 2021-11-23 |
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| CN112422144B (en) * | 2020-10-30 | 2022-06-24 | 锐石创芯(深圳)科技股份有限公司 | Radio frequency front-end device and wireless device |
| CN112886999B (en) * | 2021-01-25 | 2021-10-26 | 维沃移动通信有限公司 | Radio frequency circuit, electronic equipment and radio frequency control method |
| CN114793121B (en) * | 2021-01-25 | 2024-02-27 | Oppo广东移动通信有限公司 | Radio frequency system and communication device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101154978A (en) * | 2006-09-29 | 2008-04-02 | 宣德科技股份有限公司 | Wireless communication receiver and its receiving method |
| US20110012792A1 (en) * | 2009-07-17 | 2011-01-20 | Motorola, Inc. | Antenna arrangement for multimode communication device |
| CN105490697A (en) * | 2014-09-18 | 2016-04-13 | 联想(北京)有限公司 | Electronic equipment and information processing method |
| US10819033B2 (en) * | 2016-06-28 | 2020-10-27 | Apple Inc. | Transmitting and receiving radio signals with tunable antennas tuned based on throughput performance |
| CN107370496B (en) * | 2017-08-29 | 2019-01-22 | 维沃移动通信有限公司 | A kind of antenna switching system and mobile terminal |
| CN108233983A (en) * | 2018-01-02 | 2018-06-29 | 联想(北京)有限公司 | A kind of method of controlling antenna and terminal device |
| CN108199725A (en) * | 2018-03-16 | 2018-06-22 | 广东欧珀移动通信有限公司 | Multidiameter option switch and Related product |
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