CN216488457U - Coupler and coupling circuit and communication device thereof - Google Patents
Coupler and coupling circuit and communication device thereof Download PDFInfo
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- CN216488457U CN216488457U CN202123008950.3U CN202123008950U CN216488457U CN 216488457 U CN216488457 U CN 216488457U CN 202123008950 U CN202123008950 U CN 202123008950U CN 216488457 U CN216488457 U CN 216488457U
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Abstract
The application is suitable for the technical field of communication, and provides a coupler and a coupling circuit and a communication device thereof, wherein the coupling circuit comprises: n coupling ends, wherein n is an integer greater than 1; the power distribution unit is connected between the first end of the coupling line and the coupling end and comprises n output ends, the power distribution unit is used for carrying out average distribution on the power of the first coupling signal to obtain n second coupling signals with equal power, and the n second coupling signals are respectively output through the n output ends; each first power adjusting unit is connected between one output end and one coupling end of the power distribution unit and is used for carrying out power adjustment on a second coupling signal output by the power distribution unit to obtain a target signal and transmitting the target signal to the coupling end connected with the target signal; the power of the target signal obtained by different first power regulating units is unequal, so that the application range of the coupler is expanded.
Description
Technical Field
The application belongs to the technical field of communication, and particularly relates to a coupler, a coupling circuit of the coupler and a communication device of the coupler.
Background
A directional coupler is a power coupling element with directivity, and is widely used in various rf microwave systems. For example, the directional coupler and the detector may be combined into a high-power rf filter detection device, and the power of the rf signal may be monitored by detecting the signal coupled by the directional coupler. Generally, detectors using different detection methods have different detection ranges and different power requirements for input signals, that is, different requirements for the degree of coupling (or isolation) of couplers connected thereto.
However, the coupling degree of the conventional directional coupler is usually fixed and single, the coupled signal can only be applied to one detection method, and when the signal coupled out from the directional coupler needs to be detected by different detection methods, a plurality of different directional couplers need to be connected, which increases the complexity of the circuit. Therefore, the application range of the existing directional coupler is small.
SUMMERY OF THE UTILITY MODEL
In view of this, embodiments of the present application provide a coupler, a coupling circuit thereof, and a communication device, so as to solve the technical problem that the coupling degree of the existing coupler is fixed and single, which results in a small application range of the coupler.
In a first aspect, an embodiment of the present application provides a coupling circuit of a coupler, including an isolation end, a coupling end, and a coupling line connected between the isolation end and the coupling end, where the coupling line is used to obtain a first coupling signal from a main transmission line of the coupler; the number of the coupling ends is n, and n is an integer greater than 1; the coupling circuit further comprises:
the power distribution unit is connected between the first end of the coupling line and the coupling end and comprises n output ends, and the power distribution unit is used for carrying out average distribution on the power of the first coupling signal to obtain n second coupling signals with equal power and respectively outputting the n second coupling signals through the n output ends;
each of the n first power adjusting units is connected between one output end of the power distribution unit and one coupling end, and the first power adjusting units are used for performing power adjustment on the second coupling signal output by the power distribution unit to obtain a target signal and transmitting the target signal to the coupling ends connected with the target signal; and the power of the target signal obtained by different first power regulating units is unequal.
In a second aspect, an embodiment of the present application provides a coupler, including an input terminal, a pass-through terminal, and a main transmission line connected between the input terminal and the pass-through terminal, where the main transmission line is configured to transmit a radio frequency signal from the input terminal to the pass-through terminal, and the coupler further includes the coupling circuit according to the first aspect.
In a third aspect, an embodiment of the present application provides a communication apparatus, including n detectors and the coupler according to the second aspect; each detector is connected with one coupling end of the coupler; the detection modes of different detectors are different.
The coupler, the coupling circuit and the communication device provided by the embodiment of the application have the following beneficial effects:
the coupling circuit of the coupler provided by the embodiment of the application comprises n coupling ends, wherein n is an integer greater than 1; by arranging the power distribution unit between the first end of the coupling line and the coupling end, the power distribution unit can distribute the power of the first coupling signal coupled from the main transmission line to obtain n second coupling signals with equal power, by providing a first power regulating unit between each output terminal and each coupling terminal of the power dividing unit, the power of the second coupling signal output by each output end of the power distribution unit can be adjusted to obtain a plurality of target signals with unequal power, and the plurality of target signals with unequal power are output through different coupling ends, so that the different coupling ends of the coupler have different degrees of coupling, that is, the coupler in the embodiment of the present application has at least two adjustable different degrees of coupling, the coupler can meet the requirements of at least two different detection modes simultaneously, and therefore the application range of the coupler is expanded.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a coupler according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a coupler according to another embodiment of the present application;
fig. 3 is a schematic circuit diagram of a coupling circuit of a coupler according to an embodiment of the present disclosure;
fig. 4 is a schematic circuit diagram of a coupling circuit of a coupler according to another embodiment of the present application;
fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. 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.
It is noted that the terminology used in the description of the embodiments of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application. In the description of the embodiments of the present application, "/" means "or" unless otherwise specified, for example, a/B may mean a or B; "and/or" herein is merely an associative relationship describing an association, meaning that there may be three relationships, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more, and "at least one", "one or more" means one, two or more, unless otherwise specified.
In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
The embodiment of the application firstly provides a coupler. Please refer to fig. 1, which is a schematic structural diagram of a coupler according to an embodiment of the present disclosure. As shown in fig. 1, the coupler 100 may be a directional coupler, which may include: the radio frequency signal transmission device comprises an input end A for accessing a radio frequency signal, a through end B for outputting the radio frequency signal, a main transmission line 11 which is connected between the input end A and the through end B and is used for transmitting the radio frequency signal from the input end A to the through end B, and a coupling circuit 12 which is coupled with the main transmission line 11. The coupling circuit 12 is used for coupling out a part of the radio frequency signal transmitted on the main transmission line 11 as a coupling signal.
The frequency range of the radio frequency signal accessed by the input terminal a may be set according to actual requirements, and is not particularly limited herein.
Specifically, the coupling circuit 12 may include: an isolation terminal C, n coupling terminals (D1-Dn) and a coupling line (also called a sub-transmission line) 120 connected between the isolation terminal C and the coupling terminals.
The coupled line 120 is coupled to the main transmission line 11 of the coupler 100, and the coupled line 120 is used for obtaining a first coupled signal from the main transmission line 11.
In a specific application, the main transmission line 11 and the coupling line 120 may be microstrip lines, strip lines, coaxial lines, or waveguides, and may be specifically set according to actual requirements, and no particular limitation is imposed thereon.
In this embodiment, different coupling ends may be respectively connected to detectors adopting different detection modes. The detectors using different detection methods have different detection ranges, that is, different requirements for the power of the input signal. For example, the coupling end D1 may be connected to a detector using a Logarithmic (LOG) detection method, the coupling end D2 may be connected to a detector using a Root Mean Square (RMS) detection method, and the like, which may be specifically set according to actual requirements, and is not particularly limited herein.
Based on this, the coupling circuit 12 further includes: a power distribution unit 121 and n first power adjustment units (first power adjustment unit 1 to first power adjustment unit n).
The power distribution unit 121 is connected between the first end of the coupling line 120 and the coupling ends (D1-D2) of the coupling circuit 12, and the power distribution unit 121 is configured to equally distribute the power of the first coupling signal to obtain n second coupling signals with equal power, and output the n second coupling signals through n output ends of the power distribution unit 121.
Each of the n first power adjusting units is connected between an output terminal and a coupling terminal of the power distributing unit 121, and the first power adjusting unit is configured to perform power adjustment on the second coupling signal to obtain a target signal, and transmit the target signal to the coupling terminal connected to the first power adjusting unit.
For example, the first power adjusting unit 1 may be connected between the first output terminal of the power dividing unit 121 and the coupling terminal D1, the first power adjusting unit 2 may be connected between the second output terminal of the power dividing unit 121 and the coupling terminal D2, and so on, and the first power adjusting unit n may be connected between the nth output terminal of the power dividing unit 121 and the coupling terminal Dn.
In the embodiment of the application, the power of the second coupling signal is 1/n of the power of the first coupling signal.
The power of the target signals obtained by different first power regulating units is unequal.
In one possible implementation, the first power regulating unit may include a first attenuator. The first attenuator may be a pi-type attenuation network or a T-type attenuation network, etc. It should be noted that the first attenuators included in the different first power adjusting units have unequal power attenuation amounts.
As can be seen from the above, the coupling circuit of the coupler provided in this embodiment includes n coupling ends, where n is an integer greater than 1; by arranging the power distribution unit between the first end of the coupling line and the coupling end, the power distribution unit can distribute the power of the first coupling signal coupled from the main transmission line to obtain n second coupling signals with equal power, by providing a first power regulating unit between each output terminal and each coupling terminal of the power dividing unit, the power of the second coupling signal output by each output end of the power distribution unit can be adjusted to obtain a plurality of target signals with unequal power, and the plurality of target signals with unequal power are output through different coupling ends, so that the different coupling ends of the coupler have different degrees of coupling, that is, the coupler in the embodiment of the present application has at least two adjustable different degrees of coupling, the coupler can meet the requirements of at least two different detection modes simultaneously, and therefore the application range of the coupler is expanded.
Please refer to fig. 2, which is a schematic structural diagram of a coupler according to another embodiment of the present application. The difference between this embodiment and the embodiment corresponding to fig. 1 is that the coupling circuit 12 in this embodiment may further include:
and a second power adjusting unit 122 connected between the first end of the coupling line 120 and the power dividing unit 121, wherein the second power adjusting unit 122 is configured to perform power adjustment on the first coupling signal and transmit the power-adjusted first coupling signal to the power dividing unit 121.
Correspondingly, the power distribution unit 121 is configured to evenly distribute the power of the power-adjusted first coupling signal, so as to obtain n second coupling signals with equal power.
In one possible implementation, the second power adjusting unit 122 may include a second attenuator. The second attenuator may be a pi-type attenuation network or a T-type attenuation network, etc. The second attenuator is used to attenuate the power of the first coupled signal by a certain amount and transmit the attenuated power to the power distribution unit 121.
With continued reference to fig. 2, in another embodiment of the present application, the coupling circuit 12 may further include:
the first filtering unit 123 is connected between the second power adjusting unit 122 and the power distributing unit 121, and the first filtering unit 123 is configured to perform filtering processing on the power-adjusted first coupling signal and transmit the filtered first coupling signal to the power distributing unit 121.
Correspondingly, the power distribution unit 121 is configured to evenly distribute the power of the filtered first coupled signal, so as to obtain n second coupled signals with equal power.
In one possible implementation, the first filtering unit 123 may specifically be a filter. The type of the filter may be set according to actual requirements, and is not particularly limited herein.
In this embodiment, the second power adjusting unit and the first filtering unit are disposed between the first end of the coupling line and the power distribution unit, the second power adjusting unit adjusts the power of the first coupling signal output by the first end of the coupling line, and the first filtering unit performs filtering processing on the first coupling signal after power adjustment, so that the power of the first coupling signal input to the power distribution unit can meet the requirement.
With continued reference to fig. 2, in another embodiment of the present application, the coupling circuit 12 may further include:
n second filter units (second filter unit 1 to second filter unit n), each second filter unit being connected between one output terminal and one coupling terminal of the power distribution unit 121. Specifically, each second filtering unit may be connected between an output terminal of the power distribution unit 121 and a first power adjusting unit, or each second filtering unit may be connected between a first power adjusting unit and a coupling terminal, or each second filtering unit may be connected between an output terminal of the power distribution unit 121 and a first power adjusting unit, or each second filtering unit may be connected between a first power adjusting unit and a coupling terminal. The second filtering unit is used for carrying out filtering processing on the second coupling signal and/or the target signal.
Correspondingly, the first power adjusting unit is used for performing power adjustment on the filtered second coupling signal to obtain a target signal; and/or the coupling end is used for receiving the target signal after the filtering processing.
In this embodiment, the second filtering unit is disposed between each output end of the power distribution unit and each coupling end of the coupler, so that all signals transmitted from each output end of the power distribution unit to each coupling end can be filtered, and the frequency of each target signal finally output from the coupling end can meet the preset requirement, and further the coupling degree of each coupling end can meet the preset requirement.
With continued reference to fig. 2, in another embodiment of the present application, the coupling circuit 12 may further include:
and a third power adjusting unit 124 connected to the second end of the coupling line 120, wherein the third power adjusting unit 124 is configured to perform power adjustment on the signal output from the second end of the coupling line 120.
In this embodiment, because the second end of the coupling line is connected to the isolation end of the coupler, the adjustment of the power of the signal output from the second end of the coupling line (i.e., the isolation end of the coupler) can be realized by setting the third power adjustment unit at the second end of the coupling line, and then the adjustment of the isolation of the coupler is realized, so that the isolation of the coupler can meet the preset requirement.
In this embodiment, the coupling mode of the coupler 100 may be reverse coupling or forward coupling, which may be specifically set according to actual requirements, and the coupling mode of the coupler 100 is not particularly limited herein.
It should be noted that, when the coupler 100 adopts different coupling manners, the coupling lines 120 under different coupling manners may adopt the same design, so that the coupling degree, the directivity, and the coupling return loss of the coupling lines 120 under different coupling manners are all equal.
In one embodiment of the present application, when the coupling mode of the coupler 100 is reverse coupling, the specific circuit structure of the coupling circuit 12 can be as shown in fig. 3. Referring to fig. 3, in the embodiment, the power distribution unit 121 may specifically be a power divider U1. An input pin of the power divider U1 is an input end of the power distribution unit 121, and an input pin of the power divider U1 is configured to receive the first coupling signal; the ground feet of the power divider U1 are grounded; the first output pin to the nth output pin of the power divider U1 are n output terminals of the power distribution unit 121, respectively.
In this embodiment, the first power adjusting unit may be a pi-type network composed of a resistor, a capacitor and/or an inductor. For example, the first power conditioning unit 1 may be a pi-type network composed of a first resistor R1, a first capacitor C1, and a first inductor L1. The first resistor R1 is an adjustable resistor. The first end of the first resistor R1 and the first end of the first capacitor C1 are connected in common to serve as the input end of the first power adjusting unit 1, the adjusting end of the first resistor R1 and the first end of the first inductor L1 are connected in common to serve as the output end of the first power adjusting unit 1, the second end of the first resistor R1 is connected in an air-to-air manner, and the second end of the first capacitor C1 and the second end of the first inductor L1 are both grounded. In this example, since the high frequency characteristics of the capacitor and the inductor make the first capacitor C1 and the first inductor L1 on both sides of the first resistor R1 have certain resistances, the pi-type network composed of the first resistor R1, the first capacitor C1 and the first inductor L1 performs a power attenuation function. Impedance matching can be performed by adjusting the resistance value of the first resistor R1, so as to adjust the power attenuation of the first power adjusting unit 1, thereby adjusting the power of the target signal, and further adjusting the coupling degree of the coupling end D1. In addition, by adjusting the value of the first inductor L1, the adjustment of the coupling return loss of the coupling end D1 can be realized.
For example, the first power adjusting unit n may be a pi-type network composed of the second resistor R2, the third resistor R3, and the second inductor L2. The second resistor R2 is an adjustable resistor. The first end of the second resistor R2 and the first end of the third resistor R3 are connected in common to serve as the input end of the first power adjusting unit n, the adjusting end of the second resistor R2 and the first end of the second inductor L2 are connected in common to serve as the output end of the first power adjusting unit n, the second end of the second resistor R2 is connected in an idle mode, and the second end of the third resistor R3 and the second end of the second inductor L2 are both grounded. In this example, since the high frequency characteristic of the inductor makes the second inductor L2 have a certain resistance, the pi-type network formed by the second resistor R2, the third resistor R3 and the second inductor L2 plays a role in power attenuation. Impedance matching can be performed by adjusting the resistance value of the second resistor R2, and the power attenuation of the first power adjusting unit n is adjusted, so that the power of the second target signal is adjusted, and the coupling degree of the coupling end Dn is adjusted. In addition, by adjusting the value of the second inductor L2, the coupling return loss of the coupling terminal Dn can be adjusted.
It is understood that in other embodiments, the third resistor R3 may be free-pad, i.e., the third resistor R3 may not be included in the second power conditioning unit 123.
In a possible implementation manner of the embodiment, the second power adjusting unit 122 may specifically be a pi-type network composed of a fourth resistor R4, a second capacitor C2, and a fifth resistor R5. A first end of the fourth resistor R4 and a first end of the second capacitor C2 are commonly connected as an input end of the second power adjusting unit 122, a second end of the fourth resistor R4 and a first end of the fifth resistor R5 are commonly connected as an output end of the second power adjusting unit 122, and a second end of the second capacitor C2 and a second end of the fifth resistor R5 are both grounded.
In this implementation, the second inductor C2 has a certain resistance due to the high-frequency characteristic of the capacitor, so that the pi-type network formed by the fourth resistor R4, the second capacitor C2, and the fifth resistor R5 plays a role in power attenuation.
In one possible implementation manner of this embodiment, the first filtering unit 123 may include a third capacitor C3. A first terminal of the third capacitor C3 is used as an input terminal of the first filtering unit 123, and a second terminal of the third capacitor C3 is used as an output terminal of the first filtering unit 123. The third capacitor C3 may filter the power adjusted first coupled signal and transmit the filtered first coupled signal to the power distribution unit 121.
In one embodiment of the present application, the second filtering unit may include a fourth capacitor C4 and/or a fifth capacitor C5.
In one possible implementation manner of this embodiment, the second filtering unit may include only the fourth capacitor C4. A first terminal of the fourth capacitor C4 is connected to an output terminal of the power distribution unit 121, and a second terminal of the fourth capacitor C4 is connected to an input terminal of a first power conditioning unit. Fourth capacitor C4 may filter the second coupled signal and transmit the filtered second coupled signal to the first power conditioning unit to which it is connected.
In another possible implementation manner of this embodiment, the second filtering unit may include only the fifth capacitor C5. A first terminal of the fifth capacitor C5 is connected to an output terminal of a first power conditioning unit, and a second terminal of the fifth capacitor C5 is connected to a coupling terminal. The fifth capacitor C5 may filter the target signal output by the first power conditioning unit connected thereto and transmit the filtered target signal to the coupling terminal connected thereto.
In yet another possible implementation manner of this embodiment, the second filtering unit may include both the fourth capacitor C4 and the fifth capacitor C5. A first terminal of the fourth capacitor C4 is connected to an output terminal of the power distribution unit 121, and a second terminal of the fourth capacitor C4 is connected to an input terminal of a first power conditioning unit; a first terminal of the fifth capacitor C5 is connected to an output terminal of a first power conditioning unit, and a second terminal of the fifth capacitor C5 is connected to a coupling terminal. Fourth capacitor C4 may filter the second coupled signal and transmit the filtered second coupled signal to the first power conditioning unit to which it is connected. The fifth capacitor C5 may filter the target signal output by the first power conditioning unit connected thereto and transmit the filtered target signal to the coupling terminal connected thereto.
In another embodiment of the present application, the second filtering unit may include a sixth capacitor C6 and/or a seventh capacitor C7.
In one possible implementation manner of this embodiment, the second filtering unit may include only the sixth capacitor C6. A first terminal of the sixth capacitor C6 is connected to an output terminal of the power distribution unit 121, and a second terminal of the sixth capacitor C6 is connected to an input terminal of a first power conditioning unit. Sixth capacitor C6 may filter the second coupled signal and transmit the filtered second coupled signal to the first power conditioning unit to which it is connected.
In another possible implementation manner of this embodiment, the second filtering unit may include only the seventh capacitor C7. A first terminal of the seventh capacitor C7 is connected to an output terminal of a first power conditioning unit, and a second terminal of the seventh capacitor C7 is connected to a coupling terminal. The seventh capacitor C7 may filter the target signal output by the first power conditioning unit connected thereto and transmit the filtered target signal to the coupling terminal connected thereto.
In yet another possible implementation manner of this embodiment, the second filtering unit may include both the sixth capacitor C6 and the seventh capacitor C7. A first terminal of the sixth capacitor C6 is connected to an output terminal of the power distribution unit 121, and a second terminal of the sixth capacitor C6 is connected to an input terminal of a first power conditioning unit; a first terminal of the seventh capacitor C7 is connected to an output terminal of a first power conditioning unit, and a second terminal of the seventh capacitor C7 is connected to a coupling terminal. Sixth capacitor C6 may filter the second coupled signal and transmit the filtered second coupled signal to the first power conditioning unit to which it is connected. The seventh capacitor C7 may filter the target signal output by the first power conditioning unit connected thereto and transmit the filtered target signal to the coupling terminal connected thereto.
In a possible implementation manner of this embodiment, the third power adjusting unit 124 may include: a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and an eighth capacitor C8. The sixth resistor R6 and the seventh resistor R7 are both adjustable resistors. An adjusting end of the sixth resistor R6 and a first end of the eighth resistor R8 are commonly connected to a second end of the coupling line 120, a second end of the eighth resistor R8, a first end of the eighth capacitor C8 and an adjusting end of the seventh resistor R7 are commonly connected, a first end of the sixth resistor R6, a second end of the eighth capacitor C8 and a first end of the seventh resistor R7 are all grounded, and a second end of the sixth resistor R6 and a second end of the seventh resistor R7 are all in idle connection.
In a specific application, the resistance of the eighth resistor R8 may be 0 ohm (Ω), that is, the eighth resistor R8 may be replaced by a straight line.
In this implementation manner, the power of the signal output from the isolation terminal can be adjusted by adjusting the resistance value of the sixth resistor, the resistance value of the seventh resistor, and/or the capacitance value of the eighth capacitor, so as to adjust the isolation and the directivity of the coupler.
In another embodiment of the present application, when the coupling mode of the coupler 100 is forward coupling, the specific circuit structure of the coupling circuit 12 can be as shown in fig. 4. Referring to fig. 4, in this embodiment, a specific circuit structure of the power distribution unit 121 is the same as the specific circuit structure of the power distribution unit 121 in the embodiment corresponding to fig. 3, and specific reference is made to fig. 3 and the related description in the embodiment corresponding to fig. 3, which is not repeated herein.
In this embodiment, the first power adjusting unit may be a pi-type network composed of a resistor, a capacitor and/or an inductor. For example, the first power conditioning unit 1 may be a pi-type network composed of a ninth resistor R9, a ninth capacitor C9, and a tenth resistor R10. The ninth resistor R9 is an adjustable resistor. A first end of the ninth resistor R9 and a first end of the ninth capacitor C9 are commonly connected as an input end of the first power adjusting unit 1, an adjusting end of the ninth resistor R9 and a first end of the tenth resistor R10 are commonly connected as an output end of the first power adjusting unit 1, a second end of the ninth resistor R9 is connected in an air-connected mode, and a second end of the ninth capacitor C9 and a second end of the tenth resistor R10 are both grounded. In this example, the ninth capacitor C9 has a certain resistance due to the high frequency characteristics of the capacitors, so that the pi-network formed by the ninth resistor R9, the ninth capacitor C9 and the tenth resistor R10 plays a role in power attenuation. Impedance matching can be performed by adjusting the resistance value of the ninth resistor R9, so that the power attenuation of the first power adjusting unit 1 is adjusted, the power of the target signal is adjusted, and the coupling degree of the coupling end D1 is adjusted.
For example, the first power conditioning unit n may be a pi-type network composed of an eleventh resistor R11, a twelfth resistor R12, and a third inductor L3. The eleventh resistor R11 is an adjustable resistor. A first end of the eleventh resistor R11 and a first end of the twelfth resistor R12 are commonly connected as an input end of the first power adjusting unit n, an adjusting end of the eleventh resistor R11 and a first end of the third inductor L3 are commonly connected as an output end of the first power adjusting unit n, a second end of the eleventh resistor R11 is connected in an air-connected mode, and a second end of the twelfth resistor R12 and a second end of the third inductor L3 are both grounded. In this example, since the high frequency characteristic of the inductor makes the third inductor L3 have a certain resistance, the pi network composed of the eleventh resistor R11, the twelfth resistor R12, and the third inductor L3 plays a role of power attenuation. Impedance matching can be performed by adjusting the resistance value of the eleventh resistor R11, so that the power attenuation of the first power adjusting unit n is adjusted, the power of the second target signal is adjusted, and the coupling degree of the coupling end Dn is adjusted. In addition, by adjusting the value of the third inductor L3, the coupling return loss of the coupling terminal Dn can be adjusted.
It is understood that, in other embodiments, the twelfth resistor R12 may be dummy, that is, the twelfth resistor R12 may not be included in the second power conditioning unit 123.
In one possible implementation manner of this embodiment, the second power adjusting unit 122 may be a pi-type network composed of a thirteenth resistor R13, a fourteenth resistor R14, and a fifteenth resistor R15. A first end of the thirteenth resistor R13 and a first end of the fourteenth resistor R14 are commonly connected as an input end of the second power adjusting unit 122, a second end of the thirteenth resistor R13 and a first end of the fifteenth resistor R15 are commonly connected as an output end of the second power adjusting unit 122, and a second end of the fourteenth resistor R14 and a second end of the fifteenth resistor R15 are both grounded.
In one possible implementation manner of this embodiment, the first filtering unit 123 may include a tenth capacitor C10 and an eleventh capacitor C11. Specifically, a first terminal of the tenth capacitor C10 and a first terminal of the eleventh capacitor C11 are commonly connected to serve as the input terminal of the first filter unit 123, a second terminal of the tenth capacitor C10 serves as the output terminal of the first filter unit 123, and a second terminal of the eleventh capacitor C11 is connected to ground. The filter circuit formed by the tenth capacitor C10 and the eleventh capacitor C11 may filter the power-adjusted first coupling signal and transmit the filtered first coupling signal to the power distribution unit 121.
In an embodiment of the present application, the second filtering unit may include a twelfth capacitor C12 and/or a filter composed of a fourth inductor L4 and a thirteenth capacitor C13.
In a possible implementation manner of this embodiment, the second filtering unit may include only the twelfth capacitor C12. A first terminal of the twelfth capacitor C12 is connected to an output terminal of the power distribution unit 121, and a second terminal of the twelfth capacitor C12 is connected to an input terminal of a first power conditioning unit. The twelfth capacitor C12 may filter the second coupled signal and transmit the filtered second coupled signal to the first power conditioning unit to which it is connected.
In another possible implementation manner of this embodiment, the second filtering unit may only include a filter composed of the fourth inductor L4 and the thirteenth capacitor C13. A first end of the thirteenth capacitor C13 and a first end of the fourth inductor L4 are connected to an output terminal of the first power adjusting unit, a second end of the fourth inductor L4 is grounded, and a second end of the thirteenth capacitor C13 is connected to a coupling terminal. The thirteenth capacitor C13 may filter the target signal and transmit the filtered target signal to its connected coupling terminal. In addition, by adjusting the value of the fourth inductor L4, the coupling return loss of the corresponding coupling end can be adjusted.
In another possible implementation manner of this embodiment, the second filtering unit may include: a twelfth capacitor C12 and a filter consisting of a fourth inductor L4 and a thirteenth capacitor C13. A first terminal of the twelfth capacitor C12 is connected to an output terminal of the power distribution unit 121, and a second terminal of the twelfth capacitor C12 is connected to an input terminal of a first power conditioning unit. The twelfth capacitor C12 may filter the second coupled signal and transmit the filtered second coupled signal to the first power conditioning unit to which it is connected. The thirteenth capacitor C13 may filter the target signal and transmit the filtered target signal to its connected coupling terminal. In addition, by adjusting the value of the fourth inductor L4, the coupling return loss of the corresponding coupling end can be adjusted.
In one embodiment of the present application, the second filtering unit may include a fourteenth capacitance C14 and/or a fifteenth capacitance C15.
In a possible implementation manner of this embodiment, the second filtering unit may include only the fourteenth capacitor C14. A first terminal of the fourteenth capacitor C14 is connected to an output terminal of the power distribution unit 121, and a second terminal of the fourteenth capacitor C14 is connected to an input terminal of a first power conditioning unit. A fourteenth capacitor C14 may filter the second coupled signal and transmit the filtered second coupled signal to the first power conditioning unit to which it is connected.
In another possible implementation manner of this embodiment, the second filtering unit may include only the fifteenth capacitor C15. A first terminal of the fifteenth capacitor C15 is connected to an output terminal of a first power conditioning unit, and a second terminal of the fifteenth capacitor C15 is connected to a coupling terminal. The fifteenth capacitor C15 may filter the target signal output by the first power conditioning unit to which it is connected and transmit the filtered target signal to the coupled terminal to which it is connected.
In yet another possible implementation manner of this embodiment, the second filtering unit may include both the fourteenth capacitor C14 and the fifteenth capacitor C15. A first terminal of the fourteenth capacitor C14 is connected to an output terminal of the power distribution unit 121, and a second terminal of the fourteenth capacitor C14 is connected to an input terminal of a first power conditioning unit; a first terminal of the fifteenth capacitor C15 is connected to an output terminal of a first power conditioning unit, and a second terminal of the fifteenth capacitor C15 is connected to a coupling terminal. A fourteenth capacitor C14 may filter the second coupled signal and transmit the filtered second coupled signal to the first power conditioning unit to which it is connected. The fifteenth capacitor C15 may filter the target signal output by the first power conditioning unit to which it is connected and transmit the filtered target signal to the coupled terminal to which it is connected.
In a possible implementation manner of this embodiment, the third power adjusting unit 124 may include: a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19 and a fifth inductor L5. The sixteenth resistor R16 and the seventeenth resistor R17 are both adjustable resistors. Specifically, the adjusting terminal of the sixteenth resistor R16, the first terminal of the eighteenth resistor R18 and the first terminal of the fifth inductor L5 are commonly connected to the second terminal of the coupling line 120, the second terminal of the eighteenth resistor R18, the first terminal of the nineteenth resistor R19 and the adjusting terminal of the seventeenth resistor R17 are commonly connected, the first terminal of the sixteenth resistor R16, the first terminal of the seventeenth resistor R17, the second terminal of the nineteenth resistor R19 and the second terminal of the fifth inductor L5 are all grounded, and the second terminal of the sixteenth resistor R16 and the second terminal of the seventeenth resistor R17 may be both connected in an idle manner.
In a specific application, the resistance of the nineteenth resistor R19 may be 0 Ω, i.e., the nineteenth resistor R19 may be replaced by a straight line.
In this implementation manner, the power of the signal output from the isolation terminal can be adjusted by adjusting the resistance of the sixteenth resistor and/or the resistance of the seventeenth resistor, so as to adjust the isolation of the coupler. In addition, the fifth inductor can increase the inductance of the main transmission line, which is beneficial to improving the directivity of the coupler.
An embodiment further provides a coupling circuit of a coupler, which may be the coupling circuit in each embodiment corresponding to fig. 1 to 4, and please refer to fig. 1 to 4 and the relevant description in each embodiment corresponding to fig. 1 to 4, which is not repeated herein.
An embodiment of the present application further provides a communication device, and fig. 5 is a schematic structural diagram of the communication device provided in the embodiment of the present application. As shown, the communication device 500 may include: n detectors (detector 1-detector n) and coupler 100 in the embodiment corresponding to fig. 1-4.
Wherein each detector is connected to one coupling end of the coupler 100. For example, detector 1 may be connected to coupling terminal D1 of coupler 100, detector 2 may be connected to coupling terminal D2 of coupler 100, and so on, and detector n may be connected to coupling terminal Dn of coupler 100.
Note that the detection modes of the detectors may be different. For example, the detection method of the detector 1 may be LOG detection, and the detection method of the detector 2 may be RMS detection.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A coupling circuit of a coupler comprises an isolation end, a coupling end and a coupling line connected between the isolation end and the coupling end, wherein the coupling line is used for acquiring a first coupling signal from a main transmission line of the coupler; the device is characterized in that the number of the coupling ends is n, and n is an integer greater than 1; the coupling circuit further comprises:
the power distribution unit is connected between the first end of the coupling line and the coupling end and comprises n output ends, and the power distribution unit is used for carrying out average distribution on the power of the first coupling signal to obtain n second coupling signals with equal power and respectively outputting the n second coupling signals through the n output ends;
each of the n first power adjusting units is connected between one output end of the power distribution unit and one coupling end, and the first power adjusting units are used for performing power adjustment on the second coupling signal output by the power distribution unit to obtain a target signal and transmitting the target signal to the coupling ends connected with the target signal; and the power of the target signal obtained by different first power regulating units is unequal.
2. The coupling circuit of claim 1, further comprising:
the second power adjusting unit is connected between the first end of the coupling line and the power distribution unit, and is used for performing power adjustment on the first coupling signal and transmitting the first coupling signal after power adjustment to the power distribution unit;
correspondingly, the power distribution unit is configured to perform average distribution on the power of the first coupled signal after power adjustment, so as to obtain n second coupled signals with equal power.
3. The coupling circuit of claim 2, further comprising:
the first filtering unit is connected between the second power regulating unit and the power distribution unit, and is used for filtering the first coupling signal after power regulation and transmitting the first coupling signal after filtering to the power distribution unit;
correspondingly, the power distribution unit is configured to perform power distribution on the filtered first coupling signal to obtain n second coupling signals with equal power.
4. The coupling circuit of claim 1, further comprising:
each of the n second filtering units is connected between one of the output terminals and one of the coupling terminals of the power distribution unit, and is configured to perform filtering processing on the second coupling signal and/or the target signal;
correspondingly, the first power adjusting unit is configured to perform power adjustment on the filtered second coupling signal to obtain the target signal; and/or the coupling end is used for receiving the target signal after filtering processing.
5. The coupling circuit of claim 1, further comprising:
and the third power adjusting unit is connected with the second end of the coupling line and is used for adjusting the power of the signal output by the second end of the coupling line.
6. The coupling circuit according to any of claims 1 to 5, wherein the first power adjusting unit comprises a first attenuator, and the first attenuator comprises unequal power attenuation amounts for different first power adjusting units.
7. The coupling circuit of claim 6, wherein the first attenuator is a pi-type attenuation network.
8. The coupling circuit of claim 2 or 3, wherein the second power regulating unit comprises a second attenuator.
9. A coupler comprising an input terminal, a pass-through terminal and a main transmission line connected between said input terminal and said pass-through terminal, said main transmission line being adapted to transmit radio frequency signals from said input terminal to said pass-through terminal, characterized in that said coupler further comprises a coupling circuit as claimed in any one of claims 1 to 8.
10. A communication apparatus comprising n detectors and the coupler of claim 9; each detector is connected with one coupling end of the coupler; the detection modes of different detectors are different.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123008950.3U CN216488457U (en) | 2021-11-30 | 2021-11-30 | Coupler and coupling circuit and communication device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123008950.3U CN216488457U (en) | 2021-11-30 | 2021-11-30 | Coupler and coupling circuit and communication device thereof |
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| CN216488457U true CN216488457U (en) | 2022-05-10 |
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