CN111464204A - Radio frequency circuit and antenna tuning circuit - Google Patents
Radio frequency circuit and antenna tuning circuit Download PDFInfo
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- CN111464204A CN111464204A CN202010142606.4A CN202010142606A CN111464204A CN 111464204 A CN111464204 A CN 111464204A CN 202010142606 A CN202010142606 A CN 202010142606A CN 111464204 A CN111464204 A CN 111464204A
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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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—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
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
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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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
- H04B1/1036—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters
Abstract
The application relates to a radio frequency circuit and an antenna tuning circuit, wherein the radio frequency circuit comprises a radio frequency transceiver, a voltage regulating circuit, an inductor and an adjustable capacitor. The first end of the inductor is electrically connected with the first output end of the radio frequency transceiver, and the input end of the voltage regulating circuit is electrically connected with the second output end of the radio frequency transceiver and used for controlling the voltage regulating circuit to work. And the first end of the adjustable capacitor is electrically connected with the second end of the inductor and the output end of the voltage adjusting circuit respectively, and the second end of the adjustable capacitor is grounded. The radio frequency circuit does not need to replace the capacitor and the inductor again when the radio frequency burr is eliminated, the technical problem that the existing radio frequency circuit is low in elimination efficiency of the radio frequency burr is solved, and the technical effect that the radio frequency circuit is improved in elimination efficiency of the radio frequency burr is achieved.
Description
Technical Field
The present application relates to the field of electronic circuits, and more particularly, to a radio frequency circuit and an antenna tuning circuit.
Background
At present, radio frequency circuits are widely applied to various communication devices and electronic products, some out-of-band interference waves or harmonic waves often appear in the radio frequency circuits, and the out-of-band interference waves may be interference waves of a certain frequency band or radio frequency burrs of a certain frequency point. At present, most of interference waves in a radio frequency circuit are suppressed by adopting a filter, and aiming at radio frequency burrs, the purpose of eliminating the radio frequency burrs is achieved by adjusting inductance values and capacitance values in the filter circuit to frequency points of the radio frequency burrs. Because the frequency points of the radio frequency burrs in different circuits are different, when the radio frequency burrs are eliminated, a worker needs to calculate corresponding inductance and capacitance values according to the frequency points of the radio frequency burrs, and then the inductance and the capacitance in the filter circuit are replaced by the inductance and the capacitance which accord with the calculation result. The inductor and the capacitor need to be reconnected to the radio frequency circuit in a welding mode and the like when the inductor and the capacitor are replaced in the filter circuit, so that the existing radio frequency circuit is low in efficiency of eliminating radio frequency burrs.
Disclosure of Invention
Therefore, it is necessary to provide a radio frequency circuit and an antenna tuning circuit for solving the problem of low efficiency of eliminating radio frequency glitches in the existing radio frequency circuit.
A radio frequency circuit, comprising:
a radio frequency transceiver;
the first end of the inductor is electrically connected with the first output end of the radio frequency transceiver;
the input end of the voltage regulating circuit is electrically connected with the second output end of the radio frequency transceiver, and the radio frequency transceiver is used for controlling the voltage regulating circuit to work;
and the first end of the adjustable capacitor is electrically connected with the second end of the inductor and the output end of the voltage regulating circuit respectively, and the second end of the adjustable capacitor is grounded.
In one embodiment, the method further comprises the following steps:
and the first end of the MIPI port is electrically connected with the second output end of the radio frequency transceiver, and the second end of the MIPI port is electrically connected with the input end of the voltage regulating circuit.
In one embodiment, the method further comprises the following steps:
the input end of the radio frequency power amplifier is electrically connected with the first output end of the radio frequency transceiver, and the output end of the radio frequency power amplifier is electrically connected with the first end of the inductor.
In one embodiment, the method further comprises the following steps:
and the input end of the radio frequency front-end circuit is electrically connected with the first end of the inductor.
In one embodiment, the inductor and the adjustable capacitor are both multiple;
one said inductor in series with one said adjustable capacitor; a first end of each inductor is connected between an output end of the radio frequency power amplifier and an input end of the radio frequency front-end circuit, and a second end of each inductor is electrically connected with a first end of each adjustable capacitor; the second end of each adjustable capacitor is grounded.
In one embodiment, the method further comprises the following steps:
and the first end of the resistance-capacitance sensing assembly is electrically connected with the output end of the radio frequency power amplifier, and the second end of the resistance-capacitance sensing assembly is electrically connected with the input end of the radio frequency front-end circuit.
In one embodiment, the capacitance-resistance sensing assembly comprises:
a first end of the first capacitance-resistance inductor is electrically connected with the output end of the radio frequency power amplifier, and a second end of the first capacitance-resistance inductor is electrically connected with the input end of the radio frequency front-end circuit;
a first end of the second capacitance resistance inductance is electrically connected with a first end of the first capacitance resistance inductance, and a second end of the second capacitance resistance inductance is grounded;
a first end of the third capacitance resistance inductance is electrically connected with a second end of the first capacitance resistance inductance, and the second end of the third capacitance resistance inductance is grounded;
the first end of the inductor is connected between the second end of the first resistance-capacitance inductor and the input end of the radio frequency front-end circuit.
In one embodiment, the capacitance-resistance sensing assembly further comprises:
a first end of the fourth capacitance resistance inductance is electrically connected with a second end of the first capacitance resistance inductance, and a second end of the fourth capacitance resistance inductance is electrically connected with an input end of the radio frequency front-end circuit;
the first end of the inductor is connected between the second end of the first resistance-capacitance inductor and the first end of the fourth resistance-capacitance inductor.
In one embodiment, the number of the resistance-capacitance sensing assemblies is multiple, and the multiple resistance-capacitance sensing assemblies are connected in parallel.
An antenna tuning circuit comprising:
the radio frequency circuit as described above;
the input end of the radio frequency power amplifier is electrically connected with the first output end of the radio frequency transceiver, and the output end of the radio frequency power amplifier is electrically connected with the first end of the inductor;
the input end of the radio frequency front-end circuit is electrically connected with the first end of the inductor;
and the input end of the tuning circuit is electrically connected with the output end of the radio frequency front-end circuit.
The embodiment of the application provides a radio frequency circuit, which comprises a radio frequency transceiver, a voltage regulating circuit, an inductor and an adjustable capacitor. By setting the voltage regulating circuit, the embodiment of the application can connect the voltage regulating circuit with the second output end of the radio frequency transceiver through the signal connection, and the radio frequency transceiver controls the voltage regulating circuit, so that the adjustment of the capacitance of the adjustable capacitor can be realized. When the radio frequency circuit is used, the inductor is fixed, and a worker can enable the inductor and the adjustable capacitor to generate resonant waves with the same frequency point as the radio frequency burr only by controlling the radio frequency transceiver, so that the radio frequency burr in the radio frequency circuit is eliminated. The radio frequency circuit does not need to replace the capacitor and the inductor again when the radio frequency burr is eliminated, the technical problem that the existing radio frequency circuit is low in elimination efficiency of the radio frequency burr is solved, and the technical effect that the radio frequency circuit is improved in elimination efficiency of the radio frequency burr is achieved.
Drawings
Fig. 1 is a schematic diagram of a radio frequency circuit according to an embodiment of the present application;
fig. 2 is a schematic diagram of a radio frequency circuit according to an embodiment of the present application;
fig. 3 is a schematic diagram of a radio frequency circuit according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a resistance-capacitance sensing element of a radio frequency circuit according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an antenna tuning circuit according to an embodiment of the present application.
Description of reference numerals:
10. a radio frequency circuit; 100. a radio frequency transceiver; 200. an inductance; 300. a voltage regulation circuit; 400. an adjustable capacitance; 500. an MIPI port; 600. a radio frequency power amplifier; 700. a radio frequency front end circuit; 800. a resistance-capacitance sensing component; 810. a first capacitance resistance; 820. a second capacitance resistance; 830. a third resistance-capacitance feeling; 840. a fourth capacitance resistance; 900. a variable capacitance chip; 20. an antenna tuning circuit; 21. a tuning circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, a radio frequency circuit and an antenna tuning circuit of the present application are further described in detail by embodiments and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The embodiment of the present application provides a radio frequency circuit 10, which may be applied to different environments or electronic devices, such as microwave transmission devices, radars, short-wave and ultra-short-wave communication devices, mobile phones, mobile base station front-end devices, broadcasting devices, antennas of various communication devices, and the like. The following embodiments are specifically described by taking the radio frequency circuit 10 as an example for the antenna.
Referring to fig. 1, an embodiment of the present application provides a radio frequency circuit 10, including: radio frequency transceiver 100, inductor 200, voltage regulation circuit 300, and tunable capacitor 400.
The rf transceiver 100 is a source of rf energy for the rf circuit 10, and the rf transceiver 100 is used for generating rf signals and activating and powering rf energy of the rf signals to a back-end processing unit. In this embodiment, the rf transceiver 100 may be used for controlling, modulating, decoding, filtering, and amplifying the rf signals transmitted and received by the antenna, and the rf signals reflected or backscattered from the subsequent processing units. The radio frequency transceiver 100 may be integrally packaged in a reader/writer, or may exist as an independent device, and in this embodiment, the radio frequency transceiver 100 is not limited at all, and only needs to satisfy the function of transmitting and receiving the radio frequency signal. The radio frequency transceiver 100 has two outputs, a first output and a second output.
The inductor 200 and the adjustable capacitor 400 are connected in series to form an L C resonant circuit, the L C resonant circuit is used to generate a resonant point that is the same as a frequency point of a radio frequency glitch in the radio frequency circuit 10, the second end of the adjustable capacitor 400 is grounded, and the inductor 200 and the adjustable capacitor 400 are not limited in any way, and only the function of forming a L C resonant circuit by connecting in series to each other needs to be satisfied.
The input end of the voltage adjusting circuit 300 is electrically connected to the second output end of the radio frequency transceiver 100, the output end of the voltage adjusting circuit 300 is electrically connected to the first end of the adjustable capacitor 400, and the radio frequency transceiver 100 is configured to control the voltage adjusting circuit 300 to operate. The voltage regulating circuit 300 may include a micro voltage regulator, which may be a contact voltage regulator, a transistor voltage regulator, an integrated circuit regulator, or a computer-controlled regulator, and in this embodiment, the voltage regulator may be any one or any combination thereof. The voltage regulating circuit 300 is not limited in this embodiment, and only needs to fulfill the function of controlling the capacitance of the tunable capacitor 400.
The working principle of the radio frequency circuit 10 provided by the embodiment of the present application is as follows:
when the radio frequency circuit 10 generates a radio frequency glitch, the radio frequency transceiver 100 controls the voltage adjusting circuit 300 to change the voltage between the two plates of the adjustable capacitor 400, so as to change the capacitance of the adjustable capacitor 400. according to the formula, F ═ 1/(2 pi √ (L C)) determines the inductance value and the capacitance value corresponding to the radio frequency glitch frequency point, where F represents the frequency point of the radio frequency glitch, L represents the inductance value of the inductor 200, and C represents the capacitance of the adjustable capacitor 400, and the inductance value of the inductor 200 is fixed, i.e., the inductance value of the inductor 200 is fixed, at this time, the radio frequency transceiver 100 only needs to control the voltage adjusting circuit 300 to change the capacitance of the adjustable capacitor 400, so that the resonant circuit formed by the inductor 200 and the adjustable capacitor 400 generates a resonance same as the radio frequency glitch, the second end of the adjustable capacitor 400 is grounded, and the radio frequency glitch flows to the ground through the second end of the adjustable capacitor 400, thereby achieving the purpose of eliminating the radio frequency glitch.
The present embodiment provides an rf circuit 10, which includes an rf transceiver 100, a voltage regulating circuit 300, an inductor 200, and an adjustable capacitor 400. In this embodiment, the voltage adjusting circuit 300 is arranged, the voltage adjusting circuit 300 is connected to the second output end of the rf transceiver 100 by a signal, and the rf transceiver 100 controls the voltage adjusting circuit 300, so that the capacitance of the tunable capacitor 400 can be adjusted. When the radio frequency transceiver 100 is used, the inductor 200 is fixed, and a worker can enable the inductor 200 and the adjustable capacitor 400 to generate resonant waves with the same frequency point as the radio frequency burrs only by controlling the radio frequency transceiver 100, so that the radio frequency burrs in the radio frequency circuit 10 are eliminated. In this embodiment, the radio frequency circuit 10 does not need to replace the capacitor and the inductor 200 again when the radio frequency burr is eliminated, so that the technical problem that the radio frequency burr elimination efficiency of the existing radio frequency circuit is low is solved, and the technical effect of improving the radio frequency burr elimination efficiency of the radio frequency circuit is achieved.
Referring to fig. 2, in an embodiment, the rf circuit 10 further includes: MIPI port 500. A first end of the MIPI port 500 is electrically connected to a second output end of the radio frequency transceiver 100, a second end of the MIPI port 500 is electrically connected to an input end of the voltage adjusting circuit 300, and the MIPI port 500 is used for transmitting a control signal of the radio frequency transceiver 100 to the voltage adjusting circuit 300. The MIPI port 500 adopts differential signal transmission, so that matching of differential impedance can be realized, and the transmission line differential impedance value of the MIPI port 500 can be 80-125 ohms. The MIPI port 500 is a port for using a low-amplitude signal swing in a high-speed data transmission mode, and has high power sensitivity. In this embodiment, the MIPI port 500 is not limited at all, and only the function of transmitting the control signal of the radio frequency transceiver 100 to the voltage regulation circuit 300 needs to be satisfied.
In one embodiment, the MIPI port 500, the voltage regulation circuit 300, and the adjustable capacitor 400 may be integrally packaged as a variable capacitor chip 900, that is, the functions of the MIPI port 500, the voltage regulation circuit 300, and the adjustable capacitor 400 are implemented by the variable capacitor chip 900. The control terminal of the variable capacitor chip 900 is in signal connection with the second output terminal of the radio frequency transceiver 100, and the input terminal of the variable capacitor chip 900 is electrically connected with the second terminal of the inductor 200. In this embodiment, the specific type of the variable capacitor chip 900 is not limited, and only the function of adjusting the capacitance of the variable capacitor chip 900 through the rf transceiver 100 needs to be satisfied.
In one embodiment, the rf circuit 10 further includes: the rf power amplifier 600, the rf front-end circuit 700, and the rc component 800.
The input end of the radio frequency power amplifier 600 is electrically connected to the first output end of the radio frequency transceiver 100, and the output end of the radio frequency power amplifier 600 is electrically connected to the first end of the inductor 200. The radio frequency signal output by the radio frequency transceiver 100 has a smaller power, and the radio frequency power amplifier 600 is configured to amplify the power of the radio frequency signal, so that the radio frequency signal amplified by the radio frequency power amplifier 600 obtains a sufficient radio frequency power, and is fed back to the antenna to be transmitted. In this embodiment, the radio frequency power amplifier 600 is not limited at all, and the function of amplifying the radio frequency signal power needs to be satisfied.
The rf front-end circuit 700 is a circuit near the antenna portion and is an rf front-end. The rf front-end circuit 700 may include a transmit path, a receive path, a filter, an rf switch, and the like. The input end of the rf front-end circuit 700 is electrically connected to the first end of the inductor 200, and the front-end circuit is used to ensure that a useful rf signal can be completely picked up from the space without distortion and then delivered to a processing unit at a later stage.
Referring to fig. 3 and fig. 4, a first terminal of the rc element 800 is electrically connected to the output terminal of the rf power amplifier 600, and a second terminal of the rc element 800 is electrically connected to the input terminal of the rf front-end circuit 700. There is some out-of-band noise in the rf signal received back through the antenna, and the rc assembly 800 is used to filter the out-of-band noise. One or more resistance-capacitance sensing elements 800 may be provided, and when there are a plurality of resistance-capacitance sensing elements 800, the plurality of resistance-capacitance sensing elements 800 are connected in parallel.
In a specific embodiment, each of the capacitance-resistance sensing assemblies 800 includes: a first capacitance resistance 810, a second capacitance resistance 820, and a third capacitance resistance 830.
A first end of the first rc 810 is electrically connected to an output end of the rf power amplifier 600, and a second end of the first rc 810 is electrically connected to an input end of the rf front-end circuit 700. A first end of the second rc 820 is electrically connected to the first end of the first rc 810, and a second end of the second rc 820 is grounded. A first end of the third rc 830 is electrically connected to a second end of the first rc 810, and a second end of the third rc 830 is grounded. A first terminal of the inductor 200 is connected between a second terminal of the first rc inductor 810 and an input terminal of the rf front-end circuit 700. In this embodiment, the types, values, and the like of the first capacitance resistance 810, the second capacitance resistance 820, and the third capacitance resistance 830 are not limited at all, and may be specifically selected according to actual needs.
In a specific embodiment, the rc assembly 800 further comprises a fourth rc 840. A first end of the fourth rc 840 is electrically connected to a second end of the first rc 810, and a second end of the fourth rc 840 is electrically connected to an input end of the rf front-end circuit 700. The first end of the inductor 200 is connected between the second end of the first rc 810 and the first end of the fourth rc 840. In this embodiment, the type, value, and the like of the fourth capacitance-resistance sensor 840 are not limited at all, and may be specifically selected according to actual needs.
In one embodiment, the inductors 200 and the adjustable capacitors 400 are plural, one inductor 200 is connected in series with one adjustable capacitor 400, a first end of each inductor 200 is connected between an output end of the rf power amplifier 600 and an input end of the rf front-end circuit 700, for example, the inductor 200 may be connected to a common connection point of the first rc 810 and the fourth rc 840, a second end of each inductor 200 is electrically connected to a first end of each adjustable capacitor 400, a second end of each adjustable capacitor 400 is grounded, one inductor 200 and one adjustable capacitor 400 are connected in series to form an L C resonant circuit, each L C resonant circuit corresponds to one rf glitch, the inductors 200 and the adjustable capacitors 400 are plural, and the inductors 200 and the adjustable capacitors 400 are connected in series to form plural L C resonant circuits, which may generate plural different resonant points, so that plural rf glitches may be correspondingly eliminated.
Referring to fig. 5, an embodiment of the present application provides an antenna tuning circuit 20 including: radio frequency circuit 10, radio frequency power amplifier 600 and tuning circuit 21.
The beneficial effects of the rf circuit 10 are described in detail in the above embodiments, and are not described herein again.
The input end of the radio frequency power amplifier 600 is electrically connected to the first output end of the radio frequency transceiver 100, and the output end of the radio frequency power amplifier 600 is electrically connected to the first end of the inductor 200. An input terminal of the rf front-end circuit 700 is electrically connected to a first terminal of the inductor 200.
An input terminal of the tuning circuit 21 is electrically connected to an output terminal of the rf front-end circuit 700. The tuning circuit 21 is a resonant circuit with adjustable resonant frequency, and generally adjusts components of the resonant circuit, such as a capacitor, so that the natural frequency of the circuit is consistent with the frequency of the radio channel to be received, thereby achieving the purpose of frequency band selection. In this embodiment, the tuning circuit 21 is used for tuning the antenna receiving signal, and the tuning circuit 21 is not limited in this embodiment, and only needs to satisfy the requirement that the selection function for the antenna receiving signal can be implemented.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A radio frequency circuit, comprising:
a radio frequency transceiver (100);
an inductor (200), a first end of the inductor (200) being electrically connected to a first output of the radio frequency transceiver (100);
the input end of the voltage regulating circuit (300) is electrically connected with the second output end of the radio frequency transceiver (100), and the radio frequency transceiver (100) is used for controlling the voltage regulating circuit (300) to work;
the first end of the adjustable capacitor (400) is electrically connected with the second end of the inductor (200) and the output end of the voltage regulating circuit (300) respectively, and the second end of the adjustable capacitor (400) is grounded.
2. The radio frequency circuit of claim 1, further comprising:
a first end of the MIPI port (500) is electrically connected with a second output end of the radio frequency transceiver (100), and a second end of the MIPI port (500) is electrically connected with an input end of the voltage regulating circuit (300).
3. The radio frequency circuit of claim 2, further comprising:
the input end of the radio frequency power amplifier (600) is electrically connected with the first output end of the radio frequency transceiver (100), and the output end of the radio frequency power amplifier (600) is electrically connected with the first end of the inductor (200).
4. The radio frequency circuit of claim 3, further comprising:
an input of the radio frequency front end circuit (700) is electrically connected to a first end of the inductor (200).
5. The radio frequency circuit according to claim 4, wherein the inductor (200) and the adjustable capacitor (400) are plural;
one said inductor (200) being in series with one said adjustable capacitor (400); a first end of each inductor (200) is connected between an output end of the radio frequency power amplifier (600) and an input end of the radio frequency front-end circuit (700), and a second end of each inductor (200) is electrically connected with a first end of each adjustable capacitor (400); the second end of each adjustable capacitor (400) is grounded.
6. The radio frequency circuit of claim 4, further comprising:
the first end of the resistance-capacitance sensing assembly (800) is electrically connected with the output end of the radio frequency power amplifier (600), and the second end of the resistance-capacitance sensing assembly (800) is electrically connected with the input end of the radio frequency front-end circuit (700).
7. The radio frequency circuit according to claim 6, wherein the capacitance-resistance-inductance component (800) comprises:
a first resistance-capacitance inductor (810), wherein a first end of the first resistance-capacitance inductor (810) is electrically connected with an output end of the radio frequency power amplifier (600), and a second end of the first resistance-capacitance inductor (810) is electrically connected with an input end of the radio frequency front-end circuit (700);
a second capacitance-resistance (820), a first end of the second capacitance-resistance (820) being electrically connected to a first end of the first capacitance-resistance (810), a second end of the second capacitance-resistance (820) being grounded;
a third capacitance-resistance (830), a first end of the third capacitance-resistance (830) being electrically connected to a second end of the first capacitance-resistance (810), a second end of the third capacitance-resistance (830) being grounded;
the first end of the inductor (200) is connected between the second end of the first rc inductor (810) and the input end of the rf front-end circuit (700).
8. The radio frequency circuit according to claim 7, wherein the capacitance-resistance-inductance component (800) further comprises:
a fourth capacitance and resistance (840), wherein a first end of the fourth capacitance and resistance (840) is electrically connected with a second end of the first capacitance and resistance (810), and a second end of the fourth capacitance and resistance (840) is electrically connected with an input end of the radio frequency front-end circuit (700);
the first end of the inductor (200) is connected between the second end of the first rc (810) and the first end of the fourth rc (840).
9. The RF circuit according to claim 8, wherein the RC-sensing component (800) is plural, and the RC-sensing components (800) are connected in parallel.
10. An antenna tuning circuit, comprising:
the radio frequency circuit (10) of any of claims 1-9;
a radio frequency power amplifier (600), an input terminal of the radio frequency power amplifier (600) being electrically connected to a first output terminal of the radio frequency transceiver (100), an output terminal of the radio frequency power amplifier (600) being electrically connected to a first terminal of the inductor (200);
an input end of the radio frequency front-end circuit (700) is electrically connected with a first end of the inductor (200);
a tuning circuit (21), an input of the tuning circuit (21) being electrically connected with an output of the radio frequency front end circuit (700).
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| CN202010142606.4A CN111464204A (en) | 2020-03-04 | 2020-03-04 | Radio frequency circuit and antenna tuning circuit |
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| CN202010142606.4A CN111464204A (en) | 2020-03-04 | 2020-03-04 | Radio frequency circuit and antenna tuning circuit |
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| CN106160760A (en) * | 2016-07-29 | 2016-11-23 | 维沃移动通信有限公司 | The harmonic suppressing method of a kind of cyclical signal and mobile terminal |
| CN206259922U (en) * | 2016-11-22 | 2017-06-16 | 广东欧珀移动通信有限公司 | RF front-end module and mobile terminal |
| CN107634766A (en) * | 2017-08-25 | 2018-01-26 | 广东欧珀移动通信有限公司 | Radio circuit, antenna assembly and electronic equipment |
| CN207530820U (en) * | 2017-12-06 | 2018-06-22 | 维沃移动通信有限公司 | A kind of RF front-end module and mobile terminal |
| CN108429565A (en) * | 2018-02-28 | 2018-08-21 | 维沃移动通信有限公司 | A kind of radio-frequency match system and mobile terminal |
| CN110113065A (en) * | 2019-05-05 | 2019-08-09 | Oppo广东移动通信有限公司 | The antenna assembly and electronic equipment of electronic equipment |
| CN110138411A (en) * | 2019-05-31 | 2019-08-16 | 维沃移动通信有限公司 | Radio circuit, signal processing method, device and terminal |
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Application publication date: 20200728 |
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