CN112054775A - Radio frequency matching unit, radio frequency matching circuit and wireless radio frequency system - Google Patents
Radio frequency matching unit, radio frequency matching circuit and wireless radio frequency system Download PDFInfo
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Abstract
The embodiment of the invention relates to a radio frequency matching unit, a radio frequency matching circuit and a wireless radio frequency system. The radio frequency matching unit includes: the impedance devices corresponding to the multiple device types are multiple, the impedance devices corresponding to at least one device type are multiple, and the impedance devices of the same device type are mutually independently arranged on different branches; and the conducting switch is in electric connection with a target impedance device in the plurality of impedance devices in a switchable manner and is used for conducting the electrically connected target impedance device so as to adapt to different working frequency bands for impedance matching. The radio frequency matching circuit comprises the radio frequency matching unit. The wireless radio frequency system comprises the radio frequency matching circuit.
Description
Technical Field
The present invention relates to the field of wireless radio frequency technologies, and in particular, to a radio frequency matching unit, a radio frequency matching circuit, and a wireless radio frequency system.
Background
With the development of the radio frequency technology, products need to be compatible with radio frequency signals of multiple frequency bands, which puts higher demands and indexes on the radio frequency front-end technology. The matching circuits of all parts of the radio frequency front end are more complex, especially the antenna common end, because the matching circuits under different frequency bands are different, 2G/3G/4G/5G needs to be compatible at the same time, the frequency range is wider than before, and 2G/3G/4G/5G compatible coexistence at the same time puts higher requirements on the radio frequency matching circuit.
At present, a common matching circuit is a fixed impedance matching circuit, and after the design is completed, the impedance matching of the matching circuit is fixed and unchanged.
However, the operating frequency band of the rf system is not constant, and since the impedance matching of the matching circuit is fixed, the matching circuit under different operating frequency bands is not optimal, which affects the conversion rate of the rf signal.
Disclosure of Invention
Accordingly, there is a need for a radio frequency matching unit, a radio frequency matching circuit and a radio frequency system that can adapt to different operating frequency bands.
A radio frequency matching unit, comprising:
the impedance devices corresponding to the multiple device types are multiple, the impedance devices corresponding to at least one device type are multiple, and the impedance devices of the same device type are mutually independently arranged on different branches;
and the conducting switch is in electric connection with a target impedance device in the plurality of impedance devices in a switchable manner and is used for conducting the electrically connected target impedance device so as to perform impedance matching on radio-frequency signals of different working frequency bands.
In one embodiment, the method further comprises the following steps:
a register for controlling the target impedance device electrically connected to the conduction switch.
In one embodiment, the plurality of impedance devices comprise at least two device types of capacitance, inductance, and resistance;
the capacitors are multiple and are arranged on different branches independently; and/or
The inductor is multiple, and the inductors are mutually independently arranged on different branches; and/or
The resistance is a plurality of, and a plurality of resistances mutually independent sets up on different branches.
In one embodiment, the conducting switch is a multi-pole multi-throw switch, and the multi-pole multi-throw switch is used for conducting a plurality of target impedance devices so as to enable the plurality of target impedance devices to be connected in parallel with each other.
A radio frequency matching circuit comprises at least one radio frequency matching unit.
In one embodiment, at least one of the rf matching units is a through matching unit, where the through matching unit includes a plurality of through impedance devices and a through conducting switch, a first end of the through matching unit is electrically connected to an input end of the rf matching circuit, and a second end of the through matching unit is electrically connected to an output end of the rf matching circuit;
the through conduction switch is used for conducting a target through impedance device in the plurality of through impedance devices between the input end of the radio frequency matching circuit and the output end of the radio frequency matching circuit.
In one embodiment, the through conduction switch comprises:
one end of the first direct-conduction switch is electrically connected with the input end of the radio frequency matching circuit, and the other end of the first direct-conduction switch is switchably and electrically connected with the first end of the target direct-conduction impedance device;
and one end of the second through conduction switch is electrically connected with the output end of the radio frequency matching circuit, and the other end of the second through conduction switch is switchably and electrically connected with the second end of the target through impedance device, so that the target through impedance device is conducted.
In one embodiment, the at least one rf matching unit is: and the first end of the grounding matching unit is arranged on a path between the input end of the radio frequency matching circuit and the output end of the radio frequency matching circuit, and the second end of the grounding matching unit is grounded.
In one embodiment, the at least one rf matching unit includes:
the direct connection matching unit comprises a plurality of direct connection impedance devices and a direct connection conducting switch, wherein the first end of the direct connection matching unit is electrically connected with the input end of the radio frequency matching circuit, the second end of the direct connection matching unit is electrically connected with the output end of the radio frequency matching circuit, and the direct connection conducting switch is used for conducting a target direct connection impedance device in the plurality of direct connection impedance devices between the input end of the radio frequency matching circuit and the output end of the radio frequency matching circuit;
and the first end of the grounding matching unit is arranged on a path between the input end of the radio frequency matching circuit and the output end of the radio frequency matching circuit, and the second end of the grounding matching unit is grounded.
A wireless radio frequency system comprises the radio frequency matching circuit.
The radio frequency matching unit comprises a plurality of impedance devices corresponding to a plurality of device types, wherein a plurality of impedance devices corresponding to at least one device type are arranged on different branches independently; the conducting switch is connected with the target impedance devices in the impedance devices in a switchable manner and used for conducting the electrically connected target impedance devices so as to carry out impedance matching on radio-frequency signals of different working frequency bands.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an rf matching unit according to an embodiment;
fig. 2 is a schematic structural diagram of another rf matching unit provided in one embodiment;
fig. 3 is a schematic structural diagram of an rf matching circuit according to an embodiment;
FIG. 4 is a schematic diagram of an alternative RF matching circuit according to an embodiment;
FIG. 5 is a schematic diagram of an alternative RF matching circuit according to one embodiment;
fig. 6 is a schematic structural diagram of a radio frequency system according to an embodiment.
Description of reference numerals: the radio frequency matching circuit comprises a radio frequency matching unit 100, an impedance device 110, a conducting switch 120, a through matching unit 100A, a through impedance device 110A, a through conducting switch 120A, a ground matching unit 100B, a ground impedance device 110B, a ground conducting switch 120B, a first through conducting switch 121A, a second through conducting switch 122A, a first ground matching subunit 101B, a first ground conducting switch 121B, a second ground conducting switch 122B, a first through matching subunit 101A, a second through matching subunit 102A, a radio frequency matching circuit 10, a radio frequency transceiver 20, a power amplifier 30, a duplexer 40, a radio frequency switch 50 and an antenna 60.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. The first resistance and the second resistance are both resistances, but they are not the same resistance.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a radio frequency matching unit according to an embodiment. As shown in fig. 1, the rf matching unit 100 in one embodiment includes a plurality of impedance devices 110 corresponding to a plurality of device types and a turn-on switch 120. The impedance device 110 corresponding to at least one device type is plural, and the plurality of impedance devices 110 of the same device type are independently arranged on different branches. The conducting switch 120 is switchably electrically connected to a target impedance device 110 of the plurality of impedance devices 110, and is configured to conduct the electrically connected target impedance device 110, so as to perform impedance matching on radio frequency signals of different operating frequency bands.
The plurality of device types means that there are a plurality of types of the plurality of impedance devices 110. Alternatively, the plurality of device types may be at least two of resistive, capacitive, inductive, and the like device types. It is understood that the various device types of the present embodiment may include not only resistors, capacitors and inductors, but also impedance devices 110 of other device types, and the present embodiment is not limited in particular as long as components capable of implementing an impedance matching function can be used as the impedance devices 110 in the present embodiment. The plurality of impedance devices 110 corresponding to at least one device type means that the number of impedance devices 110 corresponding to one or more device types is two or more. Taking the device types of the impedance devices 110 including a resistor, a capacitor and an inductor as an example, the impedance device may have a plurality of resistors, and/or a plurality of inductors, and/or a plurality of capacitors, that is, the impedance device may have a plurality of resistors, one inductor and one capacitor, or a plurality of resistors, inductors and capacitors, and the like, which is not specifically limited herein, and may be selectively set according to the adaptive degree of impedance matching. When the number of the capacitors is multiple, the capacitors are mutually independently arranged on different branches; when the inductor is multiple, the inductors are mutually independently arranged on different branches; when the number of the resistors is multiple, the resistors are independently arranged on different branches. The target impedance device 110 is at least one of the conduction switch 120 and the plurality of impedance devices 110, and when the conduction switch 120 is electrically connected to the target impedance device 110, the target impedance device 110 is turned on, so as to perform impedance matching on radio frequency signals in different operating frequency bands.
It should be noted that the impedance devices 110 of different device types may be separately disposed on different branches, for example, the capacitor and the inductor are both disposed on different branches; the impedance device 110, which may also be of different device types, is arranged in one branch, for example one branch comprising at least two of a resistor, a capacitor and an inductor. Generally, impedance devices 110 of different device types are also arranged on different branches, i.e. only one impedance device 110 is arranged on each branch. The parameter values of the plurality of impedance devices 110 of the same device type may be the same or different, and are not limited herein. For example, when there are a plurality of capacitors, the capacitance values of the plurality of capacitors may be all the same, all different or partially the same, and the like, and the capacitance values are not particularly limited herein and may be set as needed.
Specifically, the rf matching unit 100 includes a plurality of impedance devices 110, and when the rf signals of different operating frequency bands need to be impedance-matched, the conducting switch 120 is controlled to select different impedance devices 110 from the plurality of impedance devices 110 as the target impedance device 110 for electrical connection, so as to conduct the electrically-connected target impedance device 110, and since the target impedance devices 110 electrically connected in different operating frequency bands are different and the target impedance device 110 is matched with the operating frequency band, the impedance matching can be implemented for the rf signals of different operating frequency bands. For example, the plurality of impedance devices 110 include a first impedance device 110 matched with a first operating frequency band and a second impedance device 110 matched with a second operating frequency band, where the first impedance device 110 and the second impedance device 110 are of the same device type but have different parameter values, or are impedance devices 110 of different device types, and when the first operating frequency band is used, the conducting switch 120 is electrically connected to the first impedance device 110, and the first impedance device 110 is conducted, so as to perform impedance matching on the first operating frequency band, and perform impedance matching on the second operating frequency band.
In this embodiment, the conducting switch 120 may be switched to different impedance devices 110 to perform electrical connection, so that the target impedance devices 110 conducted by the rf matching unit 100 are different, and the target impedance devices 110 are matched with the operating frequency band of the rf signal, so that a matching unit suitable for the operating frequency band may be formed according to the operating frequency band of the rf signal, thereby achieving a technical effect of performing impedance matching in different operating frequency bands.
Optionally, the conducting switch 120 may be manually turned to select the target impedance device 110 of the plurality of impedance devices 110, or may be automatically controlled to turn the conducting switch 120 to turn to select the target impedance device 110 according to the operating frequency band. In one embodiment, the rf matching unit 100 further includes a register. The register is used to control the target impedance device 110 electrically connected to the on-switch 120. Specifically, after a suitable target impedance device 110 is selected according to the operating frequency band, the register control conduction switch 120 is electrically connected to the target impedance device 110. The register functions to store binary codes and is formed by combining flip-flops having a storage function. One flip-flop can store 1-bit binary codes, so a register for storing n-bit binary codes needs to be formed by n flip-flops.
It is understood that the target impedance device 110 electrically connected to the on-switch 120 is automatically controlled by a register,
alternatively, the conducting switch 120 may be a single-pole multi-throw switch (refer to the conducting switch 120 in fig. 1), a multi-pole multi-throw switch, or the like, and may be set as needed. In one embodiment, the conducting switch 120 is a single-pole multi-throw switch for conducting one of the target impedance devices 110 of the plurality of impedance devices 110 to impedance match the conducting one of the target impedance devices 110. Referring to fig. 2, fig. 2 is a schematic structural diagram of another rf matching unit according to an embodiment. As shown in fig. 2, in one embodiment, the conducting switch 120 is a multi-pole, multi-throw switch. The multi-pole multi-throw switch is used to turn on a plurality of target impedance devices 110 so that the plurality of target impedance devices 110 are connected in parallel with each other.
Specifically, the multi-pole multi-throw switch of the present embodiment is used to turn on a plurality of target impedance devices 110 of the same device type and/or turn on a plurality of target impedance devices 110 of different device types. When the multi-pole multi-throw switch is used for conducting a plurality of target impedance devices 110 of the same device type, the plurality of target impedance devices 110 of the same device type are connected in parallel, and the impedance value of the impedance devices 110 of the same device type can be changed; when the multi-pole, multi-throw switch is used to turn on multiple target impedance devices 110 of different device types, then the multiple target impedance devices 110 of different device types are connected in parallel.
The multi-pole multi-throw switch turns on a plurality of target impedance devices 110 of the same device type or different device types, and the plurality of impedance devices 110 of the same device type are independently arranged on different branches, and the plurality of impedance devices 110 of different device types can also be independently arranged on different branches, so that the plurality of impedance devices 110 of the same device type which are turned on are in a parallel connection state, and the parameter value for impedance matching can be changed. For example, a multi-pole multi-throw switch can obtain a new inductive reactance by turning on multiple inductors independently disposed on different branches.
It can be understood that, in the multi-pole multi-throw switch of this embodiment, a plurality of target impedance devices 110 may be simultaneously selected to be electrically connected, so that the plurality of target impedance devices 110 are simultaneously connected in parallel, a new parameter value for performing impedance matching may be obtained or a plurality of types of impedance devices 110 may be selected to be connected, and it is not necessary to provide more impedance devices 110, but only a plurality of electrically connected target impedance devices 110 may be selected through the multi-pole multi-throw switch, so that the plurality of target impedance devices 110 are connected in parallel, so that a new parameter value may be obtained or a plurality of types of impedance devices 110 may be selected to be connected, and the range of the operating frequency band capable of performing impedance matching is expanded on the basis of not increasing the number of impedance devices 110. Specifically, a plurality of resistors are connected in parallel to obtain a resistance value different from the plurality of resistors; the plurality of capacitors are connected in parallel to obtain a capacitance value different from that of the plurality of capacitors; the parallel connection of the plurality of inductors can obtain an inductive reactance different from that of the plurality of inductors.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an rf matching circuit according to an embodiment. As shown in fig. 3, the rf matching circuit 10 in the present embodiment includes at least one rf matching unit 100. The rf matching unit 100 may refer to the description of any of the above embodiments, which is not described in detail herein.
In one embodiment, at least one rf matching unit 100 is a through matching unit 100A, wherein the through matching unit 100A includes a plurality of through impedance devices 110A and a through pass switch 120A, a first end of the through matching unit 100A is electrically connected to an input end of the rf matching circuit 10, and a second end of the through matching unit 100A is electrically connected to an output end of the rf matching circuit 10; the through conduction switch 120A is configured to conduct a target through impedance device 110A of the plurality of through impedance devices 110A between the input terminal of the radio frequency matching circuit 10 and the output terminal of the radio frequency matching circuit 10.
In another embodiment, the at least one rf matching unit 100 is: a ground matching unit 100B, wherein a first end of the ground matching unit 100B is disposed on a path between the input end of the rf matching circuit 10 and the output end of the rf matching circuit 10, and a second end of the ground matching unit 100B is grounded.
Specifically, the ground matching unit 100B includes a plurality of ground impedance devices 110B and a ground conduction switch 120B. Wherein a first terminal of each ground impedance device 110B is disposed on a path between an input terminal of the rf matching circuit 10 and an output terminal of the rf matching circuit 10, and a second terminal of each ground impedance device 110B is grounded. The ground conduction switch 120B is used to conduct a target ground impedance device 110B of the plurality of ground impedance devices 110B on a path between the input and output terminals of the radio frequency matching circuit 10 and between the grounds.
In another embodiment, the at least one radio frequency matching cell 100 includes a through matching cell 100A and a ground matching cell 100B. The through matching unit 100A includes a plurality of through impedance devices 110A and a through conduction switch 120A, a first end of the through matching unit 100A is electrically connected to the input end of the rf matching circuit 10, and a second end of the through matching unit 100A is electrically connected to the output end of the rf matching circuit 10. A first end of the ground matching unit 100B is disposed on a path between the input end of the rf matching circuit 10 and the output end of the rf matching circuit 10, and a second end of the ground matching unit 100B is grounded.
In the present embodiment, the plurality of through impedance devices 110A of the through matching unit 100A and the plurality of ground impedance devices 110B of the ground matching unit 100B may constitute different shapes of the radio frequency matching circuit 10. For example, the through matching unit 100A and the ground matching unit 100B may constitute a Π -type circuit or T-type circuit, and may be provided as needed, which is not limited herein. It should be noted that, when at least one rf matching unit 100 is a through matching unit 100A, the conducting switch 120 is a through conducting switch 120A, and the through conducting switch 120A is configured to conduct a target through impedance device 110A of the through impedance devices 110A between the input terminal of the rf matching circuit 10 and the output terminal of the rf matching circuit 10. When the at least one rf matching unit 100 is the ground matching unit 100B, the conducting switch 120 is a ground conducting switch 120B, and the ground conducting switch 120B is used for conducting the target ground impedance device 110B of the plurality of ground impedance devices 110B on a path between the input terminal and the output terminal of the rf matching circuit 10 and between the grounds.
It is understood that the number, type and arrangement position of the rf matching units 100 may be set as required, and the embodiment is not particularly limited.
In one embodiment, the pass through conduction switch 120A includes a first pass through conduction switch 121A and a second pass through conduction switch 122A. One end of the first through conduction switch 121A is electrically connected to the input end of the rf matching circuit 10, and the other end of the first through conduction switch 121A is switchably electrically connected to the first end of the target through impedance device 110A. One end of the second through conduction switch 122A is electrically connected to the output end of the rf matching circuit 10, and the other end of the second through conduction switch 122A is switchably electrically connected to the second end of the target through impedance device 110A, so as to turn on the target through impedance device 110A.
In this embodiment, specifically, when impedance matching between the input terminal and the output terminal of the rf matching circuit 10 is required, the first through conduction switch 121A and the second through conduction switch 122A are used together to be electrically connected to two ends of the target through impedance device 110A, so as to conduct the target through impedance device 110A between the input terminal and the output terminal.
In another embodiment, one end of each of the plurality of through impedance devices 110A may be fixedly electrically connected to the output end of the rf matching circuit 10, and the target through impedance device 110A is turned on by one through conducting switch 120A.
It can be understood that, in the present embodiment, by providing the first through conduction switch 121A and the second through conduction switch 122A, compared with a scheme that one end of a plurality of through impedance devices 110A is fixedly and electrically connected to the output end of the radio frequency matching circuit 10, the target through impedance device 110A is conducted through one through conduction switch 120A, interference caused by the fixed and electrically connected is avoided, and accuracy of impedance matching is improved.
It should be noted that, when the rf matching unit 100 is the ground matching unit 100B, the setting of the ground conducting switch 120B may refer to the description of the embodiment, and is not described in detail.
Referring to fig. 4, fig. 4 is a schematic structural diagram of another rf matching circuit according to an embodiment. As shown in fig. 4, the ground matching unit 100B of the present embodiment includes a first ground matching subunit 101B and a second ground matching subunit. The ground conduction switch 120B includes a first ground conduction switch 121B and a second ground conduction switch 122B. Wherein the first ground matching subunit 101B includes a plurality of first ground impedance devices 111B, and a second end of each of the first ground impedance devices 111B is grounded; one end of the first ground conduction switch 121B is electrically connected to the input end of the rf matching circuit 10, and the other end of the first ground conduction switch 121B is switchably electrically connected to the first end of the first target ground impedance device 110B of the plurality of first ground impedance devices 111B. The second ground matching subunit includes a plurality of second ground impedance devices 121B, and a second end of each second ground impedance device 121B is grounded; one end of the second ground-conduction switch 122B is electrically connected to the output end of the rf matching circuit 10, and the other end of the second ground-conduction switch 122B is switchably electrically connected to the first end of the second target ground impedance device 110B of the plurality of second ground impedance devices 121B.
In this embodiment, the pass-through matching unit 100A is turned on between the input terminal and the output terminal of the rf matching circuit 10, the plurality of first ground impedance devices 111B of the first ground matching subunit 101B are connected and turned on between the input terminal of the rf matching circuit 10 and the ground, and the plurality of second ground impedance devices 121B of the second ground matching subunit are connected and turned on between the output terminal of the rf matching circuit 10 and the ground, so as to form a Π -type circuit.
Referring to fig. 5, fig. 5 is a schematic structural diagram of another rf matching circuit according to an embodiment. As shown in fig. 5, the through matching unit 100A of the present embodiment includes a first through matching subunit 101A and a second through matching subunit 102A. Wherein, one end of the first through matching subunit 101A is connected to the input end of the rf matching circuit 10, the other end of the first through matching subunit 101A is connected to one end of the second through matching subunit 102A, and the other end of the second through matching subunit 102A is connected to the output end of the rf matching circuit 10. One end of the ground matching unit 100B is connected to the other end of the first through matching subunit 101A, that is, one end of the ground matching unit 100B is disposed between the first through matching subunit 101A and the second through matching subunit 102A; the other end of the ground matching unit 100B is grounded.
In this embodiment, one end of the first through matching subunit 101A is connected to the input end of the rf matching circuit 10, the other end of the first through matching subunit 101A is connected to one end of the second through matching subunit 102A, the other end of the second through matching subunit 102A is connected to the output end of the rf matching circuit 10, and one end of the ground matching unit 100B is disposed between the first through matching subunit 101A and the second through matching subunit 102A; the other end of the ground matching unit 100B is grounded to form a T-type circuit.
It is to be understood that the shape of the rf matching circuit 10 is not limited to the Π -type circuit and T-type circuit, and may be configured in various shapes as desired, and is not limited thereto.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a radio frequency system according to an embodiment. As shown in fig. 6, the wireless radio frequency system includes a radio frequency matching circuit 10, a radio frequency transceiver 20 for modulating and demodulating a radio frequency signal, a power amplifier 30 for amplifying power of each frequency band in the radio frequency signal, a duplexer 40 for receiving the radio frequency signal and transmitting the radio frequency signal, a radio frequency switch 50 for selecting a transmission path of the radio frequency signal, and an antenna 60 electrically connected to the radio frequency switch 50. In order to ensure impedance matching between two device ports and to realize maximum power transmission of the wireless radio frequency system, the radio frequency matching circuit 10 is disposed between the radio frequency transceiver 20 and the power amplifier 30, between the power amplifier 30 and the duplexer 40, and between the duplexer 40 and the radio frequency switch 50.
The rf matching circuit 10 may refer to the description of any of the above embodiments, and the description of the embodiment is not repeated. In the wireless radio frequency system provided in this embodiment, one radio frequency matching circuit 10 is disposed between the power amplifier 30 and the duplexer 40, and between the duplexer 40 and the radio frequency switch 50, and through a preset control program, when the mobile terminal operates in a certain frequency band, the inductance value, the capacitance value, and/or the resistance value are adjusted to corresponding values through a program control unit in the radio frequency matching circuit 10, so as to implement impedance matching of each device in the frequency band, and ensure maximum power transmission of radio frequency signals.
In this embodiment, the wireless rf system includes an rf matching circuit 10, the rf matching circuit 10 includes an rf matching unit 100, the rf matching unit 100 includes a plurality of impedance devices 110 corresponding to a plurality of device types, at least one of the device types includes a plurality of impedance devices 110, and the plurality of impedance devices 110 of the same device type are independently disposed on different branches; the conducting switch 120 is electrically connected to the target impedance device 110 of the plurality of impedance devices 110 in a switchable manner, and is configured to conduct the electrically connected target impedance device 110 to perform impedance matching on radio frequency signals of different operating frequency bands, and then the conducting switch 120 may be switched to different impedance devices 110 to perform electrical connection, so that the target impedance devices 110 conducted by the radio frequency matching unit 100 are different, and the target impedance devices 110 are matched with the operating frequency bands of the radio frequency signals, so that a matching unit suitable for the operating frequency bands may be formed according to the operating frequency bands of the radio frequency signals, and a technical effect of adapting to impedance matching of different operating frequency bands is achieved.
In addition, in the wireless radio frequency system provided by the embodiment of the invention, only one set of radio frequency matching circuit 10 is needed between the power amplifier 30 and the duplexer 40 and between the duplexer 40 and the radio frequency switch 50, so that the requirement of impedance matching of different working frequency bands can be met, the circuit structure is simple, and the circuit board layout space of the radio frequency matching circuit 10 is saved; in addition, for different types of radio frequency circuit boards, only different control programs need to be written in the program control unit in the radio frequency matching circuit 10, so that the requirements of different signal working frequency bands can be met, and the management and control of the radio frequency circuit boards are facilitated.
It is to be understood that the radio frequency system is not limited to the above description of the embodiments, and the embodiments are not limited to the specific limitations as long as the transceiving of signals can be realized.
The rf matching unit 100, the rf matching circuit 10 and the rf system circuit may be applied to electronic devices such as mobile terminals or other similar devices that can implement communication functions.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
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 invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A radio frequency matching unit, comprising:
the impedance devices corresponding to the multiple device types are multiple, the impedance devices corresponding to at least one device type are multiple, and the impedance devices of the same device type are mutually independently arranged on different branches;
and the conducting switch is in electric connection with a target impedance device in the plurality of impedance devices in a switchable manner and is used for conducting the electrically connected target impedance device so as to perform impedance matching on radio-frequency signals of different working frequency bands.
2. The radio frequency matching unit of claim 1, further comprising:
a register for controlling the target impedance device electrically connected to the conduction switch.
3. The radio frequency matching unit of claim 1, wherein the plurality of impedance devices comprise at least two device types of capacitance, inductance, and resistance;
the capacitors are multiple and are arranged on different branches independently; and/or
The inductor is multiple, and the inductors are mutually independently arranged on different branches; and/or
The resistance is a plurality of, and a plurality of resistances mutually independent sets up on different branches.
4. The radio frequency matching unit of any of claims 1-3, wherein the conducting switch is a multi-pole multi-throw switch for conducting a plurality of target impedance devices in parallel with each other.
5. The radio frequency matching unit of any of claims 1-3, wherein the conducting switch is a single-pole-multiple-throw switch for conducting one of a plurality of impedance devices to impedance match the conducting one of the target impedance devices.
6. A radio frequency matching circuit, characterized in that it comprises at least one radio frequency matching unit according to any of claims 1-5.
7. The radio frequency matching circuit of claim 6, wherein at least one of the radio frequency matching cells is a pass-through matching cell, wherein the pass-through matching cell comprises a plurality of pass-through impedance devices and pass-through switches, a first end of the pass-through matching cell is electrically connected to an input of the radio frequency matching circuit, and a second end of the pass-through matching cell is electrically connected to an output of the radio frequency matching circuit;
the through conduction switch is used for conducting a target through impedance device in the plurality of through impedance devices between the input end of the radio frequency matching circuit and the output end of the radio frequency matching circuit.
8. The radio frequency matching circuit of claim 7, wherein the pass through switch comprises:
one end of the first direct-conduction switch is electrically connected with the input end of the radio frequency matching circuit, and the other end of the first direct-conduction switch is switchably and electrically connected with the first end of the target direct-conduction impedance device;
and one end of the second through conduction switch is electrically connected with the output end of the radio frequency matching circuit, and the other end of the second through conduction switch is switchably and electrically connected with the second end of the target through impedance device, so that the target through impedance device is conducted.
9. The radio frequency matching circuit of claim 6, wherein the at least one radio frequency matching unit is: and the first end of the grounding matching unit is arranged on a path between the input end of the radio frequency matching circuit and the output end of the radio frequency matching circuit, and the second end of the grounding matching unit is grounded.
10. The radio frequency matching circuit of claim 6, wherein the at least one radio frequency matching unit comprises: a through matching unit and a ground matching unit;
the direct connection matching unit comprises a plurality of direct connection impedance devices and a direct connection conducting switch, wherein the first end of the direct connection matching unit is electrically connected with the input end of the radio frequency matching circuit, the second end of the direct connection matching unit is electrically connected with the output end of the radio frequency matching circuit, and the direct connection conducting switch is used for conducting a target direct connection impedance device in the plurality of direct connection impedance devices between the input end of the radio frequency matching circuit and the output end of the radio frequency matching circuit;
and the first end of the grounding matching unit is arranged on a path between the input end of the radio frequency matching circuit and the output end of the radio frequency matching circuit, and the second end of the grounding matching unit is grounded.
11. A radio frequency system comprising a radio frequency matching circuit according to any of claims 6 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010837312.3A CN112054775A (en) | 2020-08-19 | 2020-08-19 | Radio frequency matching unit, radio frequency matching circuit and wireless radio frequency system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010837312.3A CN112054775A (en) | 2020-08-19 | 2020-08-19 | Radio frequency matching unit, radio frequency matching circuit and wireless radio frequency system |
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| CN112054775A true CN112054775A (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010837312.3A Pending CN112054775A (en) | 2020-08-19 | 2020-08-19 | Radio frequency matching unit, radio frequency matching circuit and wireless radio frequency system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112929049A (en) * | 2021-01-27 | 2021-06-08 | 三维通信股份有限公司 | Method and device for transmitting radio frequency signals |
| CN113541632A (en) * | 2021-06-29 | 2021-10-22 | 深圳市广和通无线股份有限公司 | Impedance adjustable circuit |
-
2020
- 2020-08-19 CN CN202010837312.3A patent/CN112054775A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112929049A (en) * | 2021-01-27 | 2021-06-08 | 三维通信股份有限公司 | Method and device for transmitting radio frequency signals |
| CN113541632A (en) * | 2021-06-29 | 2021-10-22 | 深圳市广和通无线股份有限公司 | Impedance adjustable circuit |
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