Filter coupler and signal transceiver

Abstract

This application provides a filter-coupler and a signal transceiver. The filter-coupler includes two groups of microwave transmission lines, a first group of microwave transmission lines includes at least two stubs, and a second group of microwave transmission lines includes at least one stub. A first stub and a second stub of the first group of microwave transmission lines are connected to each other. The filter of the filter-coupler includes the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines, and is configured to filter a signal that passes through the first group of microwave transmission lines. The coupler of the filter-coupler includes a first stub of the second group of microwave transmission lines and the first stub of the first group of microwave transmission lines, and is configured to couple the signal that passes through the first group of microwave transmission lines to the first stub of the second group of microwave transmission lines. According to this application, the coupler and the filter may be integrated, and a signal coupling function and a signal filtering function are implemented at the same time, to save layout space, improve product integration, and reduce costs. In this way, a structure is simple and applicability is strong.

Description

[0001] This application claims priority to Chinese Patent Application No. 202310488646.8, filed with the China National Intellectual Property Administration on April 28, 2023, and entitled "FILTER-COUPLER AND SIGNAL TRANSCEIVER", which is incorporated herein by reference in its entirety.TECHNICAL FIELD

[0002] This application relates to the field of power electronics technologies, and in particular, to a filter-coupler and a signal transceiver.BACKGROUND

[0003] In the field of radio frequency technologies, a signal transmitter (or receiver) usually filters out a clutter (for example, higher-order harmonics) by using a filter, to improve signal transmission efficiency and optimize signal quality. In addition, the signal transmitter usually needs to couple a part (usually with relatively low power) of a signal (usually with relatively high power) of a main loop by using a coupler for real-time detection, to adjust a signal transmission parameter (for example, signal transmit power or output power) in time. In a research and practice process, the inventor of this application finds that in the conventional technology, a filter and a coupler are usually two discrete independent devices, and matching effect of direct connection is poor. In some application scenarios, an additional matching device further needs to be added between the filter and the coupler. This incurs more costs. In addition, the discrete filter and coupler usually occupy large layout space (for example, occupy a large area on a PCB). This is inconducive to improving product integration, increases design costs, and has poor applicability.SUMMARY

[0004] This application provides a filter-coupler and a signal transceiver, so that the coupler and the filter can be integrated, and a signal coupling function and a signal filtering function are implemented at the same time, to save layout space, improve product integration, and reduce costs. In this way, a structure is simple and applicability is strong.

[0005] According to a first aspect, this application provides a filter-coupler, where the filter-coupler includes two groups of microwave transmission lines, a first group of microwave transmission lines includes at least two stubs, a second group of microwave transmission lines includes at least one stub, and a first stub of the first group of microwave transmission lines is connected to a second stub of the first group of microwave transmission lines. The filter of the filter-coupler herein includes the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines, and is configured to filter a signal that passes through the first stub of the first group of microwave transmission lines. The coupler of the filter-coupler herein includes a first stub of the second group of microwave transmission lines and the first stub of the first group of microwave transmission lines, and is configured to couple the signal that passes through the first stub of the first group of microwave transmission lines to the first stub of the second group of microwave transmission lines.

[0006] In this application, the filter-coupler may be configured to transmit a signal (for example, transmit a signal between a signal transceiver circuit and an antenna). Herein, the filter-coupler includes two groups of microwave transmission lines, the first group of microwave transmission lines includes at least two stubs, and the second group of microwave transmission lines includes at least one stub. Herein, two stubs of at least one group of microwave transmission lines in the two groups of microwave transmission lines of the filter-coupler may be connected to each other (for example, the first stub of the first group of microwave transmission lines is connected to the second stub of the first group of microwave transmission lines), and the group of microwave transmission lines (for example, the first group of microwave transmission lines) including the connected stubs may be configured to implement a filtering function. Herein, at least one stub in each of the two groups of microwave transmission lines of the filter-coupler may be coupled to each other (for example, the first stub of the first group of microwave transmission lines is coupled to the first stub of the second group of microwave transmission lines), and the pair of mutually coupled stubs (for example, the first stub in the first group of microwave transmission lines and the first stub in the second group of microwave transmission lines) may be configured to implement a coupling function. Using the foregoing function combination as an example, the filter-coupler herein includes the filter and the coupler. The filter and the coupler herein may reuse the first stub in the first group of microwave transmission lines. In actual application, the first stub in the first group of microwave transmission lines may be used as a main transmission path for transmitting a signal. In other words, the filter of the filter-coupler herein may include at least two stubs (for example, the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines), and the filter may filter the signal that passes through the first stub of the first group of microwave transmission lines (for example, the filter may filter higher-order harmonics in the signal). The coupler of the filter-coupler herein may include at least two stubs (for example, the first stub of the second group of microwave transmission lines and the first stub of the first group of microwave transmission lines). The coupler may couple the signal that passes through the first stub of the first group of microwave transmission lines to the first stub of the second group of microwave transmission lines (for example, the coupler couples (or splits) a part of the signal, and a signal transmission system (for example, a signal transceiver circuit) may detect the coupled part of the signal, so that the system can monitor and control a parameter (for example, power) of the signal more accurately).

[0007] It may be understood that the filter and the coupler in the filter-coupler may reuse at least one stub in at least one group of microwave transmission lines. In other words, the reused stub may be configured not only to filter a signal, but also to couple a signal. Further, it may be understood that, in different application scenarios, the filter-coupler may include a plurality of groups of microwave transmission lines (not limited to two groups), and any group of microwave transmission lines may include one or more stubs (not limited to one or more stubs).

[0008] In this application, the filter and the coupler in the filter-coupler may reuse one (or more) stubs in one (or several) groups of microwave transmission lines based on a specific application scenario, so that the coupler and the filter can be integrated, and a signal coupling function and a signal filtering function are implemented at the same time, to save layout space, improve product integration, and reduce costs. In this way, a structure is simple and applicability is strong.

[0009] With reference to the first aspect, in a first possible implementation, the first group of microwave transmission lines and the second group of microwave transmission lines are arranged at a same conductive layer, or the first group of microwave transmission lines and the second group of microwave transmission lines are separately arranged at two conductive layers. Herein, stubs of a same group of transmission lines in the filter-coupler are arranged within a same conductive layer, and different groups of transmission lines in the filter-coupler may be arranged within a same conductive layer or a plurality of conductive layers. The conductive layer herein may be referred to as a layered structure such as a printed circuit board layer or a planar device layer in some application scenarios. The conductive layer herein may be a layered structure including, for example, a metal layer or another conductive material. In other words, in the filter-coupler, two (or more) groups of microwave transmission lines may be arranged within a same conductive layer or a plurality of conductive layers based on different application scenarios, to further save layout space, improve product integration, and reduce costs. In this way, a structure is simple, and applicability is strong.

[0010] With reference to the first possible implementation of the first aspect, in a second possible implementation, the first group of microwave transmission lines and the second group of microwave transmission lines are arranged at the same conductive layer, and the first stub of the first group of microwave transmission lines is parallel to the first stub of the second group of microwave transmission lines. Herein, each group of microwave transmission lines in the filter-coupler may be arranged at a same conductive layer. Herein, only an example in which the filter-coupler includes two groups of microwave transmission lines is used to describe a layout relationship between stubs of the groups of microwave transmission lines arranged within the same conductive layer. Herein, because the coupler in the filter-coupler may include at least two stubs (for example, the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines), to implement a signal coupling function of the coupler, the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines may be arranged in parallel. It may be understood that the first stub of the first group of microwave transmission lines being parallel to the first stub of the second group of microwave transmission lines herein may be that the first stubs are entirely parallel to each other or partially parallel to each other. In other words, a layout relationship between the two stubs in the coupler herein only needs to meet that a signal that passes through one stub (for example, the first stub of the first group of microwave transmission lines) can be coupled to the other stub (for example, the first stub of the second group of microwave transmission lines). According to this application, in the filter-coupler, two (or more) groups of microwave transmission lines may be arranged within a same conductive layer based on different application scenarios, to further save layout space, improve product integration, and reduce costs. In this way, a structure is simple, and applicability is strong.

[0011] With reference to the first possible implementation of the first aspect, in a third possible implementation, the first group of microwave transmission lines is arranged at an upper conductive layer, the second group of microwave transmission lines is arranged at a lower conductive layer, and a projection of the first stub of the first group of microwave transmission lines at the conductive layer at which the second group of microwave transmission lines is located overlaps or is parallel to the first stub of the second group of microwave transmission lines. It may be understood that, when the filter-coupler includes more than two groups of microwave transmission lines, the groups of microwave transmission lines in the filter-coupler may be arranged at different conductive layers (or some are arranged at a same conductive layer, and some are arranged at different conductive layers). Herein, only an example in which the filter-coupler includes two groups of microwave transmission lines is used to describe a layout relationship between stubs of the groups of microwave transmission lines arranged within two conductive layers (to be specific, the first group of microwave transmission lines is arranged at the upper conductive layer, and the second group of microwave transmission lines is arranged at the lower conductive layer). It may be understood that the upper conductive layer and the lower conductive layer herein represent only a relative position relationship. In actual application, the upper conductive layer and the lower conductive layer may be a left conductive layer and a right conductive layer, or a front conductive layer and a rear conductive layer. The upper conductive layer and the lower conductive layer herein may not necessarily be two adjacent conductive layers, and there may be another element or another conductive layer between the upper conductive layer and the lower conductive layer. Herein, because the coupler in the filter-coupler may include at least two stubs (for example, the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines), to implement a signal coupling function of the coupler, the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines may be arranged in parallel in space. In other words, the projection of the first stub of the first group of microwave transmission lines at the conductive layer (that is, the lower conductive layer) at which the second group of microwave transmission lines is located may overlap or be parallel to the first stub of the second group of microwave transmission lines. It may be understood that the projection of the first stub of the first group of microwave transmission lines being parallel to or overlapping the first stub of the second group of microwave transmission lines herein may be entire parallelism or entire overlapping, or may be partial parallelism or partial overlapping. In other words, a layout relationship between the two stubs in the coupler herein only needs to meet that a signal that passes through one stub (for example, the first stub of the first group of microwave transmission lines) can be coupled to the other stub (for example, the first stub of the second group of microwave transmission lines). According to this application, in the filter-coupler, two (or more) groups of microwave transmission lines may be arranged within different conductive layers (for example, arranged within the upper conductive layer and the lower conductive layer respectively) based on different application scenarios, to further save layout space, improve product integration, and reduce costs. In this way, a structure is simple, and applicability is strong.

[0012] With reference to the first possible implementation of the first aspect, in a fourth possible implementation, the first group of microwave transmission lines is arranged at a lower conductive layer, the second group of microwave transmission lines is arranged at an upper conductive layer, and a projection of the first stub of the second group of microwave transmission lines at the conductive layer at which the first group of microwave transmission lines is located overlaps or is parallel to the first stub of the first group of microwave transmission lines. It may be understood that, when the filter-coupler includes more than two groups of microwave transmission lines, the groups of microwave transmission lines in the filter-coupler may be arranged at different conductive layers (or some are arranged at a same conductive layer, and some are arranged at different conductive layers). Herein, only an example in which the filter-coupler includes two groups of microwave transmission lines is used to describe a layout relationship between stubs of the groups of microwave transmission lines arranged within two conductive layers (to be specific, the first group of microwave transmission lines is arranged at the lower conductive layer, and the second group of microwave transmission lines is arranged at the upper conductive layer). It may be understood that the upper conductive layer and the lower conductive layer herein represent only a relative position relationship. In actual application, the upper conductive layer and the lower conductive layer may be a left conductive layer and a right conductive layer, or a front conductive layer and a rear conductive layer. The upper conductive layer and the lower conductive layer herein may not necessarily be two adjacent conductive layers, and there may be another element or another conductive layer between the upper conductive layer and the lower conductive layer. Herein, because the coupler in the filter-coupler may include at least two stubs (for example, the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines), to implement a signal coupling function of the coupler, the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines may be arranged in parallel in space. In other words, the projection of the first stub of the second group of microwave transmission lines at the conductive layer (that is, the lower conductive layer) at which the first group of microwave transmission lines is located may overlap or be parallel to the first stub of the first group of microwave transmission lines. It may be understood that the projection of the first stub of the second group of microwave transmission lines being parallel to or overlapping the first stub of the first group of microwave transmission lines herein may be entire parallelism or entire overlapping, or may be partial parallelism or partial overlapping. In other words, a layout relationship between the two stubs in the coupler herein only needs to meet that a signal that passes through one stub (for example, the first stub of the first group of microwave transmission lines) can be coupled to the other stub (for example, the first stub of the second group of microwave transmission lines). According to this application, in the filter-coupler, two (or more) groups of microwave transmission lines may be arranged within different conductive layers (for example, arranged within the upper conductive layer and the lower conductive layer respectively) based on different application scenarios, to further save layout space, improve product integration, and reduce costs. In this way, a structure is simple, and applicability is strong.

[0013] With reference to the first aspect or any one of the possible implementations of the first aspect, in a fifth possible implementation, the filter of the filter-coupler includes a first-order filter or a multi-order filter, and the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines are stubs in the filter. In other words, the filter in the filter-coupler may be the first-order filter or the multi-order filter, and may include two stubs or three or more than three stubs. This may be specifically set based on an application scenario. For example, when the filter of the filter-coupler is the first-order filter, the filter may include the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines. For example, when the filter of the filter-coupler is the multi-order filter (for example, a second-order filter), the filter may include the first stub of the first group of microwave transmission lines, the second stub of the first group of microwave transmission lines, and another stub (for example, a stub such as a third stub of the first group of microwave transmission lines or a first stub of a third group of microwave transmission lines). It may be understood that the stubs in the filter in the filter-coupler need to be connected (or partially connected) to each other. In other words, a layout relationship between two stubs in the filter herein only needs to meet that a signal that passes through one stub (for example, the first stub of the first group of microwave transmission lines) can be filtered. According to this application, in the filter-coupler, two stubs (or three or more than three stubs) in one group of microwave transmission lines (or a plurality of groups of microwave transmission lines) may be connected to form the first-order filter (or the multi-order filter) based on different application scenarios, to save layout space, reduce clutter components in the signal, improve communication quality, and reduce costs. In this way, a structure is simple and applicability is strong.

[0014] With reference to the first aspect or any one of the possible implementations of the first aspect, in a sixth possible implementation, the first stub of the first group of microwave transmission lines reflects inductance at a working frequency, and the second stub of the first group of microwave transmission lines reflects capacitance at the working frequency. Herein, when the filter in the filter-coupler is the first-order filter, the filter may include two stubs. For example, when the filter of the filter-coupler includes the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines, the first stub of the first group of microwave transmission lines reflects inductance (that is, an inductive characteristic) at the working frequency, and the second stub of the first group of microwave transmission lines reflects capacitance (that is, a capacitive characteristic) at the working frequency. It may be understood that the working frequency herein may be a specific frequency (or frequency range), or may be several discrete frequencies (or frequency ranges), or may be a continuous frequency (or frequency range), or may be several continuous frequencies (or frequency ranges). Herein, the stub of the filter may also reflect different characteristics at different working frequencies. For example, the first stub of the first group of microwave transmission lines may reflect inductance (or capacitance or resistance) at one working frequency, and the second stub of the first group of microwave transmission lines may reflect capacitance (or inductance or resistance) at this working frequency. The first stub of the first group of microwave transmission lines may reflect capacitance (or inductance or resistance) at another working frequency, and the second stub of the first group of microwave transmission lines may reflect inductance (or capacitance or resistance) at this working frequency. Characteristics presented by each stub at different frequencies may be determined based on a specific application scenario. In other words, two stubs (or more than two stubs) in the filter herein may present the inductive characteristic, the capacitive characteristic, or the resistive characteristic, provided that a signal that passes through one stub (for example, the first stub of the first group of microwave transmission lines) can be filtered. According to this application, in the filter-coupler, two stubs in one group of microwave transmission lines (or a plurality of groups of microwave transmission lines) may be connected to form the first-order filter based on different application scenarios, to save layout space, thereby reducing clutter components in the signal at a plurality of working frequencies, improving communication quality, and reducing costs. In this way, a structure is simple and applicability is strong.

[0015] With reference to the first aspect or any one of the possible implementations of the first aspect, in a seventh possible implementation, the first group of microwave transmission lines further includes a third stub, and the second stub of the first group of microwave transmission lines and the third stub of the first group of microwave transmission lines are separately connected to the first stub of the first group of microwave transmission lines. Herein, the first stub of the first group of microwave transmission lines reflects inductance at the working frequency, and the second stub of the first group of microwave transmission lines and the third stub of the first group of microwave transmission lines reflect capacitance at the working frequency. Alternatively, the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines reflect inductance at the working frequency, and the third stub of the first group of microwave transmission lines reflects capacitance at the working frequency. Herein, when the filter in the filter-coupler is the second-order filter (or the multi-order filter), the filter may further include a third stub. For example, when the filter of the filter-coupler includes the first stub of the first group of microwave transmission lines, the second stub of the first group of microwave transmission lines, and the third stub of the first group of microwave transmission lines, the first stub of the first group of microwave transmission lines may reflect inductance (that is, the inductive characteristic) at the working frequency, and the second stub of the first group of microwave transmission lines and the third stub of the first group of microwave transmission lines may reflect capacitance (that is, the capacitive characteristic) at the working frequency. For another example, when the filter of the filter-coupler includes the first stub of the first group of microwave transmission lines, the second stub of the first group of microwave transmission lines, and the third stub of the first group of microwave transmission lines, the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines may reflect inductance (that is, the inductive characteristic) at the working frequency, and the third stub of the first group of microwave transmission lines may reflect capacitance (that is, the capacitive characteristic) at the working frequency.

[0016] It may be understood that the working frequency herein may be a specific frequency (or frequency range), or may be several discrete frequencies (or frequency ranges), or may be a continuous frequency (or frequency range), or may be several continuous frequencies (or frequency ranges). Herein, the stub of the filter may also reflect different characteristics at different working frequencies. For example, the first stub of the first group of microwave transmission lines may reflect inductance (or capacitance or resistance) at one working frequency, and the second stub of the first group of microwave transmission lines and the third stub of the first group of microwave transmission lines may reflect capacitance (or inductance or resistance) at this working frequency; and the first stub of the first group of microwave transmission lines may reflect capacitance (or inductance or resistance) at another working frequency, and the second stub of the first group of microwave transmission lines and the third stub of the first group of microwave transmission lines may reflect inductance (or capacitance or resistance) at this working frequency. For another example, the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines may reflect inductance (or capacitance or resistance) at one working frequency, and the third stub of the first group of microwave transmission lines may reflect capacitance (or inductance or resistance) at this working frequency; and the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines may reflect capacitance (or inductance or resistance) at another working frequency, and the third stub of the first group of microwave transmission lines may reflect inductance (or capacitance or resistance) at this working frequency. Features presented by the stubs at different frequencies may be determined based on a specific application scenario. In other words, three stubs (or more than three stubs) in the filter herein may present the inductive characteristic, the capacitive characteristic, or the resistive characteristic, provided that a signal that passes through one stub (for example, the first stub of the first group of microwave transmission lines) can be filtered. According to this application, in the filter-coupler, at least three stubs in one group of microwave transmission lines (or a plurality of groups of microwave transmission lines) may be connected to form the second-order filter or a higher-order filter based on different application scenarios, to save layout space, thereby reducing clutter components in the signal at a plurality of working frequencies, improving communication quality, and reducing costs. In this way, a structure is simple and applicability is strong.

[0017] With reference to the first aspect or any one of the possible implementations of the first aspect, in an eighth possible implementation, a spacing between the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines is less than or equal to 10 mil. Herein, an example in which the coupler in the filter-coupler includes the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines is used to describe a layout spacing of the coupler. Herein, a spacing between the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines may be less than or equal to 10 mil, a degree of coupling between the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines may be increased, and directivity between the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines is also met. In other words, in a process of coupling the signal that passes through the first stub of the first group of microwave transmission lines to the first stub of the second group of microwave transmission lines, the coupler disposed in this way can reduce interference of a signal in the coupler to another signal outside the coupler (for example, reduce interference of a signal at an isolated port of the coupler to another signal) on the basis that a signal strength obtained after coupling is sufficiently high.

[0018] With reference to the first aspect or any one of the possible implementations of the first aspect, in a ninth possible implementation, the first stub of the first group of microwave transmission lines, the second stub of the first group of microwave transmission lines, and the third stub of the first group of microwave transmission lines form the filter of the filter-coupler. Herein, the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines form the coupler of the filter-coupler. Herein, an example in which the coupler includes the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines, and the filter includes the first stub of the first group of microwave transmission lines, the second stub of the first group of microwave transmission lines, and the third stub of the first group of microwave transmission lines is used to describe a structure of the filter-coupler. The filter herein includes three stubs, which may form a second-order filter (for example, a band-pass filter). The band-pass filter may filter the signal that passes through the first stub of the first group of microwave transmission lines, to filter out a clutter whose frequency is higher than or lower than a specific frequency range in the signal. In addition, the coupler herein includes two stubs, which may form a coupler including a coupled port. The coupler may couple the signal that passes through the first stub of the first group of microwave transmission lines to the first stub of the second group of microwave transmission lines, and sample the coupled signal in the first stub of the second group of microwave transmission lines, to obtain a parameter (for example, power) of the signal that passes through the first stub of the first group of microwave transmission lines. According to this application, in the filter-coupler, three stubs in a group of microwave transmission lines may be connected to form a second-order filter based on different application scenarios, and first stubs in two groups of microwave transmission lines may be formed into the coupler at the same time, to save layout space and reduce costs. In this way, a structure is simple and applicability is strong.

[0019] With reference to the ninth possible implementation of the first aspect, in a tenth possible implementation, the first stub of the first group of microwave transmission lines, the second stub of the first group of microwave transmission lines, the third stub of the first group of microwave transmission lines, and the first stub of the second group of microwave transmission lines meet at least one of the following conditions: a length of the first stub of the first group of microwave transmission lines is 0.035λ to 0.059λ and / or a width of the first stub of the first group of microwave transmission lines is 0.0016λ to 0.0026λ; a length of the second stub of the first group of microwave transmission lines is 0.52λ to 0.86λ and / or a width of the second stub of the first group of microwave transmission lines is 0.00375λ to 0.0063λ; a length of the third stub of the first group of microwave transmission lines is 0.03λ to 0.05λ and / or a width of the third stub of the first group of microwave transmission lines is 0.09λ to 0.15λ; and a length of the first stub of the second group of microwave transmission lines is 0.032λ to 0.054λ and / or a width of the first stub of the second group of microwave transmission lines is 0.0075λ to 0.0125λ, where λ is a wavelength of a signal transmitted by the filter-coupler. The filter herein includes three stubs, which may form a second-order filter (for example, a band-pass filter). The band-pass filter may filter the signal that passes through the first stub of the first group of microwave transmission lines, to filter out a clutter whose frequency is higher than or lower than a specific frequency range in the signal. In addition, the coupler herein includes two stubs, which may form a coupler including a coupled port. The coupler may couple the signal that passes through the first stub of the first group of microwave transmission lines to the first stub of the second group of microwave transmission lines, and sample the coupled signal in the first stub of the second group of microwave transmission lines, to obtain a parameter (for example, power) of the signal that passes through the first stub of the first group of microwave transmission lines. According to this application, in the filter-coupler, three stubs in a group of microwave transmission lines may be connected to form a second-order filter based on different application scenarios, and first stubs in two groups of microwave transmission lines may be formed into the coupler at the same time, to save layout space and reduce costs. In this way, a structure is simple and applicability is strong.

[0020] With reference to the first aspect or any one of the possible implementations of the first aspect, in an eleventh possible implementation, a shape of the stub includes but is not limited to a square, an arc, a parallelogram, an L shape, or a U shape. This may be specifically set based on an application scenario, to help further save layout space, and reduce costs. In this way, a structure is simple, and applicability is strong.

[0021] With reference to the first aspect or any one of the possible implementations of the first aspect, in a twelfth possible implementation, the filter-coupler further includes a plurality of ports, and the ports are separately connected to the stubs in the filter-coupler, and are configured to transmit signals. Herein, the plurality of ports of the filter-coupler may be connected to the stubs of the filter-coupler, and the filter-coupler is connected to an external circuit through some or all of the ports, to facilitate signal transmission.

[0022] According to a second aspect, this application provides a signal transceiver, where the signal transceiver may include the filter-coupler according to the first aspect or any one of the possible implementations of the first aspect, a signal transceiver circuit, and an antenna, and the plurality of ports in the filter-coupler are separately configured to connect to the signal transceiver circuit and the antenna, to implement a communication function of the signal transceiver.

[0023] According to this application, the filter-coupler in the signal transceiver may be configured to transmit a signal between the signal transceiver circuit and the antenna. Herein, the filter-coupler may include at least two groups of microwave transmission lines and a plurality of ports. The filter-coupler may be connected to the signal transceiver circuit and the antenna through all or some of the plurality of ports. This may be specifically set based on an application scenario. It may be understood that the filter and the coupler in the filter-coupler may reuse at least one stub in at least one group of microwave transmission lines. In other words, the reused stub may be configured not only to filter a signal, but also to couple a signal. Further, it may be understood that, in different application scenarios, the filter-coupler may include a plurality of groups of microwave transmission lines (not limited to two groups), and any group of microwave transmission lines may include one or more stubs (not limited to one or more stubs).

[0024] In this application, the filter-coupler in the signal transceiver may transmit a signal between the signal transceiver circuit and the wire, and the filter and the coupler in the filter-coupler may reuse one (or more) stubs in one (or several) groups of microwave transmission lines based on a specific application scenario, so that the coupler and the filter can be integrated, and a signal coupling function and a signal filtering function are implemented at the same time, to save layout space, improve product integration, and reduce costs. In this way, a structure is simple and applicability is strong.

[0025] With reference to the second aspect, in a first possible implementation, one port connected to the first stub of the first group of microwave transmission lines in the filter-coupler may be configured to connect to the signal transceiver circuit, another port connected to the first stub of the first group of microwave transmission lines in the filter-coupler may be configured to connect to the antenna, one port connected to the first stub of the second group of microwave transmission lines in the filter-coupler may be configured to connect to the signal transceiver circuit, and another port connected to the first stub of the second group of microwave transmission lines in the filter-coupler may be configured to serve as an isolated port. A scenario in which the filter-coupler includes two groups of microwave transmission lines is used as an example. A first group of microwave transmission lines may include at least two stubs (for example, a first stub and a second stub), and a second group of microwave transmission lines may include at least one stub (for example, a first stub). Herein, an example in which the filter and the coupler in the filter-coupler reuse the first stub of the first group of microwave transmission lines is used to describe a structure and a function of the filter-coupler in the signal transceiver. The filter in the filter-coupler may include the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines, where the first stub of the first group of microwave transmission lines may be connected to the second stub of the first group of microwave transmission lines, and the group of microwave transmission lines (that is, the first group of microwave transmission lines) including the connected stubs may be configured to implement a filtering function. The coupler in the filter-coupler may include the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines, where the first stub of the first group of microwave transmission lines of the filter-coupler may be coupled to the first stub of the second group of microwave transmission lines, and the pair of mutually coupled stubs may be configured to implement a coupling function. Using the foregoing function combination as an example, two ports connected to the first stub of the first group of microwave transmission lines in the filter-coupler may be separately connected to the signal transceiver circuit and the antenna, and are configured to transmit a signal between the signal transceiver circuit and the antenna. A port connected to the first stub of the second group of microwave transmission lines in the filter-coupler may be used as a coupled port to connect to the signal transceiver circuit, and is configured to: couple a part of the signal transmitted between the signal transceiver circuit and the antenna and transmit the part back to the signal transceiver circuit, so that the signal transceiver circuit (or another detection control circuit) can more accurately monitor and control a parameter (for example, power) of the signal transmitted between the signal transceiver circuit and the antenna. Herein, another port connected to the first stub of the second group of microwave transmission lines in the filter-coupler may be used as an isolated port to connect to an isolation resistor or another isolation circuit, or keep disconnected.

[0026] In this application, the filter-coupler in the signal transceiver may transmit a signal between the signal transceiver circuit and the wire, and the filter and the coupler in the filter-coupler may reuse one stub in one group of microwave transmission lines based on a specific application scenario, so that the coupler and the filter can be integrated, and a signal coupling function and a signal filtering function are implemented at the same time, to save layout space, improve product integration, and reduce costs. In this way, a structure is simple and applicability is strong.

[0027] With reference to the second aspect or the first possible implementation of the second aspect, in a second possible implementation, the signal transceiver may further include an amplification circuit, and the plurality of ports in the filter-coupler are separately configured to connect to the signal transceiver circuit, the antenna, and the amplification circuit, to implement the communication function of the signal transceiver.

[0028] According to this application, the filter-coupler in the signal transceiver may be configured to transmit a signal between the amplification circuit and the antenna. Herein, the amplification circuit may amplify a signal of the signal transceiver circuit. Herein, the filter-coupler may include at least two groups of microwave transmission lines and a plurality of ports. The filter-coupler may be connected to the signal transceiver circuit and the antenna through all or some of the plurality of ports. This may be specifically set based on an application scenario. It may be understood that the filter and the coupler in the filter-coupler may reuse at least one stub in at least one group of microwave transmission lines. In other words, the reused stub may be configured not only to filter a signal, but also to couple a signal. Further, it may be understood that, in different application scenarios, the filter-coupler may include a plurality of groups of microwave transmission lines (not limited to two groups), and any group of microwave transmission lines may include one or more stubs (not limited to one or more stubs).

[0029] A scenario in which the filter-coupler includes two groups of microwave transmission lines is used as an example. A first group of microwave transmission lines may include at least two stubs (for example, a first stub and a second stub), and a second group of microwave transmission lines may include at least one stub (for example, a first stub). Herein, using an example in which the filter and the coupler in the filter-coupler reuse the first stub of the first group of microwave transmission lines, two ports connected to the first stub of the first group of microwave transmission lines in the filter-coupler may be separately connected to the amplification circuit and the antenna, and are configured to transmit a signal between the amplification circuit and the antenna. A port connected to the first stub of the second group of microwave transmission lines in the filter-coupler may be used as a coupled port to connect to the signal transceiver circuit, and is configured to: couple a part of the signal transmitted between the amplification circuit and the antenna and transmit the part back to the signal transceiver circuit, so that the signal transceiver circuit (or another detection control circuit) can more accurately monitor and control a parameter (for example, power) of the signal transmitted between the amplification circuit and the antenna. Herein, another port connected to the first stub of the second group of microwave transmission lines in the filter-coupler may be used as an isolated port to connect to an isolation resistor or another isolation circuit, or keep disconnected.

[0030] In this application, the filter-coupler in the signal transceiver may transmit a signal between the amplification circuit and the wire, so that power of the signal transmitted by the filter-coupler is increased. The filter and the coupler in the filter-coupler may reuse one stub in one group of microwave transmission lines based on a specific application scenario, so that the coupler and the filter can be integrated, and a signal coupling function and a signal filtering function are implemented at the same time, to save layout space, improve product integration, and reduce costs. In this way, a structure is simple and applicability is strong.BRIEF DESCRIPTION OF DRAWINGS

[0031] FIG. 1 is a diagram of an application scenario of a filter-coupler according to an embodiment of this application; FIG. 2 is a diagram of a structure of a filter-coupler according to an embodiment of this application; FIG. 3 is a diagram of another structure of a filter-coupler according to an embodiment of this application; FIG. 4 is a diagram of another structure of a filter-coupler according to an embodiment of this application; FIG. 5 is a diagram of another structure of a filter-coupler according to an embodiment of this application; FIG. 6a, FIG. 6b, and FIG. 6c are a diagram of another structure of a filter-coupler according to an embodiment of this application; FIG. 7 is a diagram of a structure of a signal transceiver according to an embodiment of this application; and FIG. 8 is a diagram of another structure of a signal transceiver according to an embodiment of this application. DESCRIPTION OF EMBODIMENTS

[0032] A filter-coupler provided in this application may be applicable to a plurality of application fields such as the field of radio frequency technologies, the field of intelligent electronic devices, the field of communications devices, and the field of wireless sensing. This may be specifically determined based on an actual application scenario, and is not limited herein. The filter-coupler provided in this application may be applicable to different signal transceiver systems such as a radio frequency system, an electronic device system, and a wireless sensing system (the signal transceiver system herein may alternatively be a signal receiving system or a signal transmitting system). This may be specifically determined based on an actual application scenario, and is not limited herein. The filter-coupler provided in this application may be adapted to different application scenarios, for example, an application scenario in which filtering and coupling are performed on a signal transmitted by a signal transceiver circuit in a communication environment, an application scenario in which filtering and coupling are performed on a signal transmitted by a signal transceiver circuit (for example, a radio frequency chip) in a router, or another application scenario. The following uses an application scenario in which filtering and coupling are performed on a signal transmitted by a signal transceiver circuit in a communication device (for example, a signal transceiver) as an example for description. Details are not described below again.

[0033] Refer to FIG. 1. FIG. 1 is a diagram of an application scenario of a filter-coupler according to an embodiment of this application. In the communication device, as shown in FIG. 1, the communication device includes a filter-coupler 1, a signal transceiver circuit 2, and an antenna 3. The filter-coupler 1 includes two groups of microwave transmission lines, a first group of microwave transmission lines includes at least two stubs, and a second group of microwave transmission lines includes at least one stub. Herein, a first stub of the first group of microwave transmission lines in the filter-coupler may be configured to connect to the signal transceiver circuit 2 and the antenna 3, a first stub of the second group of microwave transmission lines in the filter-coupler may be configured to connect to the signal transceiver circuit 2, and the first stub of the first group of microwave transmission lines in the filter-coupler may be connected to a second stub of the first group of microwave transmission lines. In some feasible implementations, the filter-coupler 1 in the signal transceiver may be configured to transmit a signal between the signal transceiver circuit 2 and the antenna 3. It may be understood that the signal transceiver circuit 2 provided in this application is applicable to sending or receiving a radio frequency signal, or sending or receiving another communication signal, for example, in an application scenario of signal sending and receiving of a plurality of devices such as a router, Bluetooth, and a mobile phone sensor. This may be specifically determined based on an actual application scenario, and is not limited herein.

[0034] A scenario in which the filter-coupler 1 shown in FIG. 1 includes two groups of microwave transmission lines is used as an example. The first group of microwave transmission lines may include at least two stubs (for example, the first stub and the second stub), and the second group of microwave transmission lines may include at least one stub (for example, the first stub). Herein, an example in which the filter and the coupler in the filter-coupler 1 reuse the first stub of the first group of microwave transmission lines is merely used to describe a structure and a function of the filter-coupler 1. The filter in the filter-coupler 1 may include the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines, where the first stub of the first group of microwave transmission lines may be connected to the second stub of the first group of microwave transmission lines, and the group of microwave transmission lines (that is, the first group of microwave transmission lines) including the connected stubs may be configured to implement a filtering function. The coupler in the filter-coupler 1 may include the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines, where the first stub of the first group of microwave transmission lines of the filter-coupler 1 may be coupled to the first stub of the second group of microwave transmission lines, and the pair of mutually coupled stubs may be configured to implement a coupling function. Using the foregoing function combination as an example, the first stub of the first group of microwave transmission lines in the filter-coupler 1 may be separately connected to the signal transceiver circuit 2 and the antenna 3, and is configured to transmit a signal between the signal transceiver circuit 2 and the antenna 3. The first stub of the second group of microwave transmission lines in the filter-coupler 1 may be connected to the signal transceiver circuit 2, and is configured to: couple a part of the signal transmitted between the signal transceiver circuit 2 and the antenna 3 and transmit the part back to the signal transceiver circuit 2, so that the signal transceiver circuit 2 (or another detection control circuit) can more accurately monitor and control a parameter (for example, power) of the signal transmitted between the signal transceiver circuit 2 and the antenna 3. For example, in a router, the filter-coupler 1 may filter a signal transmitted by the signal transceiver circuit 2, and transmit, to the antenna 3, a signal obtained after higher-order harmonics are filtered out, to meet a communication standard of the router. For another example, in the router, the filter-coupler 1 may couple the signal transmitted by the signal transceiver circuit 2, and analyze the coupled part of signal by using the signal transceiver circuit, to more accurately adjust power of the signal transmitted by the signal transceiver circuit 2.

[0035] In some feasible implementations, the filter-coupler 1 may further include a plurality of ports (for example, Port 1, Port 2, Port 3, and Port 4), and the ports may be separately connected to the stubs in the filter-coupler, and are configured to transmit signals. A manner of connection between the ports and the stubs shown in FIG. 1 is merely an example to indicate that the stubs may be connected to the ports. In specific application, the ports may alternatively be connected to the stubs in another manner. This is not limited herein. Herein, the plurality of ports of the filter-coupler 1 may be connected to the stubs of the filter-coupler 1, and the filter-coupler 1 is connected to external circuits (for example, connected to the signal transceiver circuit 2 and the antenna 3) through some ports (for example, Port 1, Port 2, and Port 3) or all of the ports (not shown in the figure), to facilitate signal transmission.

[0036] In this application, the filter-coupler may transmit a signal between the signal transceiver circuit and the wire, and the filter and the coupler in the filter-coupler may reuse one stub in one group of microwave transmission lines based on a specific application scenario, so that the coupler and the filter can be integrated, and a signal coupling function and a signal filtering function are implemented at the same time, to save layout space, improve product integration, and reduce costs. In this way, a structure is simple and applicability is strong. The following describes, with reference to FIG. 2 to FIG. 8 by using examples, structures and working principles of the filter-coupler and the signal transceiver provided in this application.

[0037] In some application scenarios, also refer to FIG. 2. FIG. 2 is a diagram of a structure of a filter-coupler according to an embodiment of this application. As shown in FIG. 2, the filter-coupler includes two groups of microwave transmission lines, a first group of microwave transmission lines includes at least two stubs (for example, a stub A and a stub B), and a second group of microwave transmission lines includes at least one stub (for example, a stub C), where a first stub (for example, the stub A) of the first group of microwave transmission lines is connected to a second stub (for example, the stub B) of the first group of microwave transmission lines. Herein, a position relationship between the stub A and the stub B may be shown in FIG. 1. The stub B is connected to one end of the stub A, and the stub B may alternatively be connected to a middle segment, as shown by the dashed lines, or another position of the stub A. The filter of the filter-coupler herein includes the first stub (for example, the stub A) of the first group of microwave transmission lines and the second stub (for example, the stub B) of the first group of microwave transmission lines, and is configured to filter a signal that passes through the first stub (for example, the stub A) of the first group of microwave transmission lines. The coupler of the filter-coupler herein includes the first stub (for example, the stub C) of the second group of microwave transmission lines and the first stub (for example, the stub A) of the first group of microwave transmission lines, and is configured to couple the signal that passes through the first stub (for example, the stub A) of the first group of microwave transmission lines to the first stub (for example, the stub C) of the second group of microwave transmission lines.

[0038] In this application, the filter-coupler may be configured to transmit a signal (for example, transmit a signal between the signal transceiver circuit and the antenna). Herein, the filter-coupler may include two groups of microwave transmission lines, the first group of microwave transmission lines includes at least two stubs (for example, the stub A and the stub B), and the second group of microwave transmission lines includes at least one stub (for example, the stub C). Herein, two stubs of at least one group of microwave transmission lines in the two groups of microwave transmission lines of the filter-coupler may be connected to each other (for example, the first stub (for example, the stub A) of the first group of microwave transmission lines is connected to the second stub (for example, the stub B) of the first group of microwave transmission lines), and the group of microwave transmission lines (for example, the first group of microwave transmission lines) including the connected stubs may be configured to implement a filtering function. Herein, at least one stub in each of the two groups of microwave transmission lines of the filter-coupler may be coupled to each other (for example, the first stub (for example, the stub A) of the first group of microwave transmission lines is coupled to the first stub (for example, the stub C) of the second group of microwave transmission lines), and the pair of mutually coupled stubs (for example, the stub A and the stub C) may be configured to implement a coupling function. Using the foregoing function combination as an example, the filter-coupler herein includes the filter and the coupler. The filter and the coupler herein may reuse the first stub in the first group of microwave transmission lines. In actual application, the first stub in the first group of microwave transmission lines may be used as a main transmission path for transmitting a signal. In other words, the filter of the filter-coupler herein may include at least two stubs (for example, the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines), and the filter may filter the signal that passes through the first stub of the first group of microwave transmission lines (for example, the filter may filter higher-order harmonics in the signal). The coupler of the filter-coupler herein may include at least two stubs (for example, the first stub of the second group of microwave transmission lines and the first stub of the first group of microwave transmission lines). The coupler may couple the signal that passes through the first stub of the first group of microwave transmission lines to the first stub of the second group of microwave transmission lines (for example, the coupler couples (or splits) a part of the signal, and a signal transmission system (for example, a signal transceiver circuit) may detect the coupled part of the signal, so that the system can monitor and control a parameter (for example, power) of the signal more accurately).

[0039] It may be understood that the filter and the coupler in the filter-coupler may reuse at least one stub in at least one group of microwave transmission lines. In other words, the reused stub may be configured not only to filter a signal, but also to couple a signal. Further, it may be understood that, in different application scenarios, the filter-coupler may include a plurality of groups of microwave transmission lines (not limited to two groups), and any group of microwave transmission lines may include one or more stubs (not limited to one or more stubs).

[0040] In this application, the filter and the coupler in the filter-coupler may reuse one (or more) stubs in one (or several) groups of microwave transmission lines based on a specific application scenario, so that the coupler and the filter can be integrated, and a signal coupling function and a signal filtering function are implemented at the same time, to save layout space, improve product integration, and reduce costs. In this way, a structure is simple and applicability is strong.

[0041] In some feasible implementations, the first group of microwave transmission lines and the second group of microwave transmission lines are arranged at a same conductive layer, or the first group of microwave transmission lines and the second group of microwave transmission lines are separately arranged at two conductive layers. Herein, stubs of a same group of transmission lines in the filter-coupler are arranged within a same conductive layer, and different groups of transmission lines in the filter-coupler may be arranged within a same conductive layer or a plurality of conductive layers. The conductive layer herein may be referred to as a layered structure such as a printed circuit board layer or a planar device layer in some application scenarios. The conductive layer herein may be a layered structure including, for example, a metal layer or another conductive material. In other words, in the filter-coupler, two (or more) groups of microwave transmission lines may be arranged within a same conductive layer or a plurality of conductive layers based on different application scenarios, to further save layout space, improve product integration, and reduce costs. In this way, a structure is simple, and applicability is strong.

[0042] In some feasible implementations, the first group of microwave transmission lines and the second group of microwave transmission lines are arranged at the same conductive layer, and the first stub (for example, the stub A) of the first group of microwave transmission lines is parallel to the first stub (for example, the stub C) of the second group of microwave transmission lines. Herein, each group of microwave transmission lines in the filter-coupler may be arranged at a same conductive layer. Herein, only an example in which the filter-coupler includes two groups of microwave transmission lines is used to describe a layout relationship between stubs of the groups of microwave transmission lines arranged within the same conductive layer. Herein, a position relationship between the stub A and the stub C may be shown in FIG. 2. The stub A and the stub C may be directly opposite to each other or may be opposite to each other in a staggered manner (that is, the stub A and the stub C may be symmetric about a central axis or may not be symmetric about the central axis). To be specific, the stub C may also have another position relationship with the stub A. For example, the stub C is partially opposite to the stub A. Herein, because the coupler in the filter-coupler may include at least two stubs (for example, the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines), to implement a signal coupling function of the coupler, the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines may be arranged in parallel. It may be understood that the first stub of the first group of microwave transmission lines being parallel to the first stub of the second group of microwave transmission lines herein may be that the first stubs are entirely parallel to each other or partially parallel to each other. In other words, a layout relationship between the two stubs in the coupler herein only needs to meet that a signal that passes through one stub (for example, the first stub of the first group of microwave transmission lines) can be coupled to the other stub (for example, the first stub of the second group of microwave transmission lines). According to this application, in the filter-coupler, two (or more) groups of microwave transmission lines may be arranged within a same conductive layer based on different application scenarios, to further save layout space, improve product integration, and reduce costs. In this way, a structure is simple, and applicability is strong.

[0043] For details, refer to FIG. 3. FIG. 3 is a diagram of a structure of a filter-coupler according to an embodiment of this application. As shown in part a in FIG. 3, the first group of microwave transmission lines (as shown in gray in the figure) is arranged at an upper conductive layer, and the second group of microwave transmission lines is arranged at a lower conductive layer (as shown in black in the figure). As shown in part b in FIG. 3, a projection of the first stub (that is, the stub A) of the first group of microwave transmission lines at the conductive layer at which the second group of microwave transmission lines is located is parallel to or overlaps the first stub (that is, the stub C) of the second group of microwave transmission lines (not shown in the figure). It may be understood that, when the filter-coupler includes more than two groups of microwave transmission lines, the groups of microwave transmission lines in the filter-coupler may be arranged at different conductive layers (or some are arranged at a same conductive layer, and some are arranged at different conductive layers). Herein, only an example in which the filter-coupler includes two groups of microwave transmission lines is used to describe a layout relationship between stubs of the groups of microwave transmission lines arranged within two conductive layers (for example, the first group of microwave transmission lines is arranged at the upper conductive layer, and the second group of microwave transmission lines is arranged at the lower conductive layer). It may be understood that the upper conductive layer and the lower conductive layer herein represent only a relative position relationship. In actual application, the upper conductive layer and the lower conductive layer may be a left conductive layer and a right conductive layer, or a front conductive layer and a rear conductive layer. The upper conductive layer and the lower conductive layer herein may not necessarily be two adjacent conductive layers, and there may be another element or another conductive layer between the upper conductive layer and the lower conductive layer.

[0044] Herein, because the coupler in the filter-coupler may include at least two stubs (for example, the first stub (for example, the stub A) of the first group of microwave transmission lines and the first stub (for example, the stub C) of the second group of microwave transmission lines), to implement a signal coupling function of the coupler, the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines may be arranged in parallel in space. In other words, the projection of the first stub of the first group of microwave transmission lines at the conductive layer (that is, the lower conductive layer) at which the second group of microwave transmission lines is located may overlap or be parallel to the first stub of the second group of microwave transmission lines. It may be understood that the projection of the first stub of the first group of microwave transmission lines being parallel to or overlapping the first stub of the second group of microwave transmission lines herein may be entire parallelism or entire overlapping, or may be partial parallelism or partial overlapping. In other words, a layout relationship between the two stubs in the coupler herein only needs to meet that a signal that passes through one stub (for example, the first stub of the first group of microwave transmission lines) can be coupled to the other stub (for example, the first stub of the second group of microwave transmission lines). According to this application, in the filter-coupler, two (or more) groups of microwave transmission lines may be arranged within different conductive layers (for example, arranged within the upper conductive layer and the lower conductive layer respectively) based on different application scenarios, to further save layout space, improve product integration, and reduce costs. In this way, a structure is simple, and applicability is strong.

[0045] Specifically, refer to FIG. 4. FIG. 4 is a diagram of another structure of a filter-coupler according to an embodiment of this application. As shown in part a in FIG. 4, the second group of microwave transmission lines (as shown in gray in the figure) is arranged at an upper conductive layer, and the first group of microwave transmission lines is arranged at a lower conductive layer (as shown in black in the figure). As shown in part b in FIG. 4, a projection of the first stub (that is, the stub C) of the second group of microwave transmission lines at the conductive layer at which the first group of microwave transmission lines is located is parallel to or overlaps the first stub (that is, the stub A) of the first group of microwave transmission lines (not shown in the figure). It may be understood that, when the filter-coupler includes more than two groups of microwave transmission lines, the groups of microwave transmission lines in the filter-coupler may be arranged at different conductive layers (or some are arranged at a same conductive layer, and some are arranged at different conductive layers). Herein, only an example in which the filter-coupler includes two groups of microwave transmission lines is used to describe a layout relationship between stubs of the groups of microwave transmission lines arranged within two conductive layers (for example, the second group of microwave transmission lines is arranged at the upper conductive layer, and the first group of microwave transmission lines is arranged at the lower conductive layer). It may be understood that the upper conductive layer and the lower conductive layer herein represent only a relative position relationship. In actual application, the upper conductive layer and the lower conductive layer may be a left conductive layer and a right conductive layer, or a front conductive layer and a rear conductive layer. The upper conductive layer and the lower conductive layer herein may not necessarily be two adjacent conductive layers, and there may be another element or another conductive layer between the upper conductive layer and the lower conductive layer.

[0046] Herein, because the coupler in the filter-coupler may include at least two stubs (for example, the first stub (for example, the stub A) of the first group of microwave transmission lines and the first stub (for example, the stub C) of the second group of microwave transmission lines), to implement a signal coupling function of the coupler, the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines may be arranged in parallel in space. In other words, the projection of the first stub of the second group of microwave transmission lines at the conductive layer (that is, the lower conductive layer) at which the first group of microwave transmission lines is located may overlap or be parallel to the first stub of the first group of microwave transmission lines. It may be understood that the projection of the first stub of the second group of microwave transmission lines being parallel to or overlapping the first stub of the first group of microwave transmission lines herein may be entire parallelism or entire overlapping, or may be partial parallelism or partial overlapping. In other words, a layout relationship between the two stubs in the coupler herein only needs to meet that a signal that passes through one stub (for example, the first stub of the first group of microwave transmission lines) can be coupled to the other stub (for example, the first stub of the second group of microwave transmission lines). According to this application, in the filter-coupler, two (or more) groups of microwave transmission lines may be arranged within different conductive layers (for example, arranged within the upper conductive layer and the lower conductive layer respectively) based on different application scenarios, to further save layout space, improve product integration, and reduce costs. In this way, a structure is simple, and applicability is strong.

[0047] In some feasible implementations, the filter of the filter-coupler includes a first-order filter or a multi-order filter, and the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines may be stubs in the filter. In other words, the filter in the filter-coupler may be the first-order filter or the multi-order filter, and may include two stubs or three or more than three stubs. This may be specifically set based on an application scenario. For example, when the filter of the filter-coupler is the first-order filter, the filter may include the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines. For example, when the filter of the filter-coupler is the multi-order filter (for example, a second-order filter), the filter may include the first stub of the first group of microwave transmission lines, the second stub of the first group of microwave transmission lines, and another stub (for example, a stub such as a third stub of the first group of microwave transmission lines or a first stub of a third group of microwave transmission lines). It may be understood that the stubs in the filter in the filter-coupler need to be connected (or partially connected) to each other. In other words, a layout relationship between two stubs in the filter herein only needs to meet that a signal that passes through one stub (for example, the first stub of the first group of microwave transmission lines) can be filtered. According to this application, in the filter-coupler, two stubs (or three or more than three stubs) in one group of microwave transmission lines (or a plurality of groups of microwave transmission lines) may be connected to form the first-order filter (or the multi-order filter) based on different application scenarios, to save layout space, reduce clutter components in the signal, improve communication quality, and reduce costs. In this way, a structure is simple and applicability is strong.

[0048] In some feasible implementations, the filter of the filter-coupler may include two stubs. For example, when the filter in the filter-coupler is the first-order filter, the filter may include two stubs. For another example, when the filter of the filter-coupler includes the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines, the first stub of the first group of microwave transmission lines reflects inductance (that is, an inductive characteristic) at the working frequency, and the second stub of the first group of microwave transmission lines reflects capacitance (that is, a capacitive characteristic) at the working frequency. It may be understood that the working frequency herein may be a specific frequency (or frequency range), or may be several discrete frequencies (or frequency ranges), or may be a continuous frequency (or frequency range), or may be several continuous frequencies (or frequency ranges). Herein, the stub of the filter may also reflect different characteristics at different working frequencies. For example, the first stub of the first group of microwave transmission lines may reflect inductance (or capacitance or resistance) at one working frequency, and the second stub of the first group of microwave transmission lines may reflect capacitance (or inductance or resistance) at this working frequency. The first stub of the first group of microwave transmission lines may reflect capacitance (or inductance or resistance) at another working frequency, and the second stub of the first group of microwave transmission lines may reflect inductance (or capacitance or resistance) at this working frequency. Characteristics presented by each stub at different frequencies may be determined based on a specific application scenario. In other words, two stubs (or more than two stubs) in the filter herein may present the inductive characteristic, the capacitive characteristic, or the resistive characteristic, provided that a signal that passes through one stub (for example, the first stub of the first group of microwave transmission lines) can be filtered. According to this application, in the filter-coupler, two stubs in one group of microwave transmission lines (or a plurality of groups of microwave transmission lines) may be connected to form the first-order filter based on different application scenarios, to save layout space, thereby reducing clutter components in the signal at a plurality of working frequencies, improving communication quality, and reducing costs. In this way, a structure is simple and applicability is strong.

[0049] In some feasible implementations, the filter of the filter-coupler may include three stubs. Refer to FIG. 5. FIG. 5 is a diagram of another structure of a filter-coupler according to an embodiment of this application. As shown in FIG. 5, the first group of microwave transmission lines further includes the third stub (for example, a stub D), where the second stub (for example, the stub B) of the first group of microwave transmission lines and the third stub (for example, the stub D) of the first group of microwave transmission lines are separately connected to the first stub (for example, the stub A) of the first group of microwave transmission lines. It may be understood that, the second stub of the first group of microwave transmission lines herein may be the stub B, and the third stub may be the stub C correspondingly. Similarly, the second stub of the first group of microwave transmission lines may alternatively be the stub C, and the third stub may be the stub B correspondingly. This may be specifically set based on an application scenario. In addition, a position relationship of the second stub of the first group of microwave transmission lines and the third stub of the first group of microwave transmission lines relative to the first stub of the first group of microwave transmission lines is not fixed. For example, a position of the third stub (or the second stub) may alternatively be on a stub D1 or a stub D2 shown by the dashed lines in FIG. 5. Herein, an example in which the coupler includes the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines, and the filter includes the first stub (for example, the stub A) of the first group of microwave transmission lines, the second stub (for example, the stub B) of the first group of microwave transmission lines, and the third stub (for example, the stub C) of the first group of microwave transmission lines is used to describe the structure of the filter-coupler. Herein, the first stub (for example, the stub A) of the first group of microwave transmission lines reflects inductance at the working frequency, and the second stub (for example, the stub B) of the first group of microwave transmission lines and the third stub (for example, the stub D) of the first group of microwave transmission lines reflect capacitance at the working frequency. Alternatively, the first stub (for example, the stub A) of the first group of microwave transmission lines and the second stub (for example, the stub B) of the first group of microwave transmission lines reflect inductance at the working frequency, and the third stub (for example, the stub D) of the first group of microwave transmission lines reflects capacitance at the working frequency. For example, when the filter in the filter-coupler is the second-order filter (or the multi-order filter), the filter may further include a third stub. For example, when the filter of the filter-coupler includes the first stub of the first group of microwave transmission lines, the second stub of the first group of microwave transmission lines, and the third stub of the first group of microwave transmission lines, the first stub of the first group of microwave transmission lines may reflect inductance (that is, the inductive characteristic) at the working frequency, and the second stub of the first group of microwave transmission lines and the third stub of the first group of microwave transmission lines may reflect capacitance (that is, the capacitive characteristic) at the working frequency. For another example, when the filter of the filter-coupler includes the first stub of the first group of microwave transmission lines, the second stub of the first group of microwave transmission lines, and the third stub of the first group of microwave transmission lines, the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines may reflect inductance (that is, the inductive characteristic) at the working frequency, and the third stub of the first group of microwave transmission lines may reflect capacitance (that is, the capacitive characteristic) at the working frequency.

[0050] It may be understood that the working frequency herein may be a specific frequency (or frequency range), or may be several discrete frequencies (or frequency ranges), or may be a continuous frequency (or frequency range), or may be several continuous frequencies (or frequency ranges). Herein, the stub of the filter may also reflect different characteristics at different working frequencies. For example, the first stub of the first group of microwave transmission lines may reflect inductance (or capacitance or resistance) at one working frequency, and the second stub of the first group of microwave transmission lines and the third stub of the first group of microwave transmission lines may reflect capacitance (or inductance or resistance) at this working frequency; and the first stub of the first group of microwave transmission lines may reflect capacitance (or inductance or resistance) at another working frequency, and the second stub of the first group of microwave transmission lines and the third stub of the first group of microwave transmission lines may reflect inductance (or capacitance or resistance) at this working frequency. For another example, the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines may reflect inductance (or capacitance or resistance) at one working frequency, and the third stub of the first group of microwave transmission lines may reflect capacitance (or inductance or resistance) at this working frequency; and the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines may reflect capacitance (or inductance or resistance) at another working frequency, and the third stub of the first group of microwave transmission lines may reflect inductance (or capacitance or resistance) at this working frequency. Features presented by the stubs at different frequencies may be determined based on a specific application scenario. In other words, three stubs (or more than three stubs) in the filter herein may present the inductive characteristic, the capacitive characteristic, or the resistive characteristic, provided that a signal that passes through one stub (for example, the first stub of the first group of microwave transmission lines) can be filtered. According to this application, in the filter-coupler, at least three stubs in one group of microwave transmission lines (or a plurality of groups of microwave transmission lines) may be connected to form the second-order filter or a higher-order filter based on different application scenarios, to save layout space, thereby reducing clutter components in the signal at a plurality of working frequencies, improving communication quality, and reducing costs. In this way, a structure is simple and applicability is strong.

[0051] It may be understood that the filter in the filter-coupler in this application may include more than three stubs. For example, when the filter includes four stubs, the filter may include the first stub (for example, the stub A) of the first group of microwave transmission lines, the second stub (for example, the stub B) of the first group of microwave transmission lines, the third stub (for example, the stub D) of the first group of microwave transmission lines, and a fourth stub (for example, a stub D1) of the first group of microwave transmission lines. It may be further understood that when the filter includes more than three stubs, a connection relationship and a position relationship between the stubs may be set based on a specific application scenario, and this is not limited herein.

[0052] In some feasible implementations, refer to the structure of the filter-coupler in FIG. 5 again. Herein, an example in which the coupler in the filter-coupler includes the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines is used to describe a layout spacing of the coupler. Herein, a spacing between the first stub (for example, the stub A) of the first group of microwave transmission lines and the first stub (for example, the stub C) of the second group of microwave transmission lines may be less than or equal to 10 mil, a degree of coupling between the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines may be increased, and directivity between the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines is also met. In other words, in a process of coupling the signal that passes through the first stub of the first group of microwave transmission lines to the first stub of the second group of microwave transmission lines, the coupler disposed in this way can reduce interference of a signal in the coupler to another signal outside the coupler (for example, reduce interference of a signal at an isolated port of the coupler to another signal) on the basis that a signal strength obtained after coupling is sufficiently high.

[0053] In some feasible implementations, refer to FIG. 5 again. When the first group of microwave transmission lines in the filter-coupler includes the third stub (for example, the stub D), the first stub (for example, the stub A) of the first group of microwave transmission lines, the second stub (for example, the stub B) of the first group of microwave transmission lines, and the third stub (for example, the stub D) of the first group of microwave transmission lines may form the filter of the filter-coupler. Herein, the first stub (for example, the stub A) of the first group of microwave transmission lines and the first stub (for example, the stub C) of the second group of microwave transmission lines may form the coupler of the filter-coupler. It may be understood that, the second stub of the first group of microwave transmission lines herein may be the stub B, and the third stub may be the stub C correspondingly. Similarly, the second stub of the first group of microwave transmission lines may alternatively be the stub C, and the third stub may be the stub B correspondingly. This may be specifically set based on an application scenario. Herein, an example in which the coupler includes the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines, and the filter includes the first stub (for example, the stub A) of the first group of microwave transmission lines, the second stub (for example, the stub B) of the first group of microwave transmission lines, and the third stub (for example, the stub C) of the first group of microwave transmission lines is used to describe the structure of the filter-coupler. The filter herein includes three stubs, which may form a second-order filter (for example, a band-pass filter). The band-pass filter may filter the signal that passes through the first stub of the first group of microwave transmission lines, to filter out a clutter whose frequency is higher than or lower than a specific frequency range in the signal. In addition, the coupler herein includes two stubs, which may form a coupler including a coupled port. The coupler may couple the signal that passes through the first stub of the first group of microwave transmission lines to the first stub of the second group of microwave transmission lines, and sample the coupled signal in the first stub of the second group of microwave transmission lines, to obtain a parameter (for example, power) of the signal that passes through the first stub of the first group of microwave transmission lines. According to this application, in the filter-coupler, three stubs in a group of microwave transmission lines may be connected to form a second-order filter based on different application scenarios, and first stubs in two groups of microwave transmission lines may be formed into the coupler at the same time, to save layout space and reduce costs. In this way, a structure is simple and applicability is strong.

[0054] In some feasible implementations, the first stub of the first group of microwave transmission lines, the second stub of the first group of microwave transmission lines, the third stub of the first group of microwave transmission lines, and the first stub of the second group of microwave transmission lines meet at least one of the following conditions: a length of the first stub of the first group of microwave transmission lines is 0.035λ to 0.059λ and / or a width of the first stub of the first group of microwave transmission lines is 0.0016λ to 0.0026λ; a length of the second stub of the first group of microwave transmission lines is 0.52λ to 0.86λ and / or a width of the second stub of the first group of microwave transmission lines is 0.00375λ to 0.0063λ; a length of the third stub of the first group of microwave transmission lines is 0.03λ to 0.05λ and / or a width of the third stub of the first group of microwave transmission lines is 0.09λ to 0.15λ; and a length of the first stub of the second group of microwave transmission lines is 0.032λ to 0.054λ and / or a width of the first stub of the second group of microwave transmission lines is 0.0075λ to 0.0125λ, where λ is a wavelength of a signal transmitted by the filter-coupler. The filter herein includes three stubs, which may form a second-order filter (for example, a band-pass filter). The band-pass filter may filter the signal that passes through the first stub of the first group of microwave transmission lines, to filter out a clutter whose frequency is higher than or lower than a specific frequency range in the signal. In addition, the coupler herein includes two stubs, which may form a coupler including a coupled port. The coupler may couple the signal that passes through the first stub of the first group of microwave transmission lines to the first stub of the second group of microwave transmission lines, and sample the coupled signal in the first stub of the second group of microwave transmission lines, to obtain a parameter (for example, power) of the signal that passes through the first stub of the first group of microwave transmission lines. According to this application, in the filter-coupler, three stubs in a group of microwave transmission lines may be connected to form a second-order filter based on different application scenarios, and first stubs in two groups of microwave transmission lines may be formed into the coupler at the same time, to save layout space and reduce costs. In this way, a structure is simple and applicability is strong.

[0055] In some feasible implementations, a shape of the stub in the filter-coupler includes but is not limited to a square, an arc, a parallelogram, an L shape, or a U shape. This may be specifically set based on an application scenario. Refer to FIG. 6a, FIG. 6b, and FIG. 6c. FIG. 6a, FIG. 6b, and FIG. 6c are a diagram of another structure of a signal transceiver according to an embodiment of this application. The following uses the second stub (for example, the stub B) in the first group of microwave transmission lines in the filter-coupler as an example to describe shapes of several stubs. As shown in FIG. 6a, a stub (for example, the stub A) in the filter-coupler may be in a shape of a square, and a stub (for example, the stub B) in the filter-coupler may be in a shape of a right-angled L shape evolved from a square, or a rounded-corner L shape evolved from a square and an arc (not shown in the figure). As shown in FIG. 6b, a stub (for example, the stub B) in the filter-coupler may be in a shape of a parallelogram. As shown in FIG. 6c, a stub (for example, the stub B) in the filter-coupler may be in a shape of an arc. It may be understood that any stub in the filter-coupler may be in a shape of a square, an arc, a parallelogram, an L shape, or a U shape (not shown) shown in FIG. 5 and FIG. 6a, FIG. 6b, and FIG. 6c. This may be specifically set based on an application scenario, to help further save layout space and reduce costs. In this way, a structure is simple, and applicability is strong.

[0056] This application further provides a signal transceiver. Refer to FIG. 7. FIG. 7 is a diagram of a structure of a signal transceiver according to an embodiment of this application. As shown in FIG. 7, the signal transceiver may include the filter-coupler in FIG. 1 to FIG. 6a, FIG. 6b, and FIG. 6c, a signal transceiver circuit, and an antenna. The plurality of ports in the filter-coupler are separately configured to connect to the signal transceiver circuit and the antenna, to implement a communication function of the signal transceiver.

[0057] According to this application, the filter-coupler in the signal transceiver may be configured to transmit a signal between the signal transceiver circuit and the antenna. Herein, the filter-coupler may include at least two groups of microwave transmission lines and the plurality of ports (for example, Port 1, Port 2, Port 3, and Port 4). The filter-coupler may be connected to the signal transceiver circuit and the antenna through all or some of the plurality of ports. This may be specifically set based on an application scenario. It may be understood that the filter and the coupler in the filter-coupler may reuse at least one stub (for example, the stub A) in at least one group of microwave transmission lines. In other words, the reused stub may be configured not only to filter a signal, but also to couple a signal. Further, it may be understood that, in different application scenarios, the filter-coupler may include a plurality of groups of microwave transmission lines (not limited to two groups), and any group of microwave transmission lines may include one or more stubs (not limited to one or more stubs).

[0058] In some feasible implementations, refer to FIG. 7 again. A port (for example, Port 1) connected to the first stub (for example, the stub A) of the first group of microwave transmission lines in the filter-coupler may be configured to connect to the signal transceiver circuit, another port (for example, Port 2) connected to the first stub (for example, the stub A) of the first group of microwave transmission lines in the filter-coupler may be configured to connect to the antenna, a port (for example, Port 3) connected to the first stub (for example, the stub C) of the second group of microwave transmission lines in the filter-coupler may be configured to connect to the signal transceiver circuit as a coupled port, and another port (for example, Port 4) connected to the first stub of the second group of microwave transmission lines in the filter-coupler may be configured to connect to an isolation resistor or another isolation circuit or keep disconnected as an isolated port. Herein, an example in which the filter-coupler includes two groups of microwave transmission lines, where the first group of microwave transmission lines includes at least two stubs (for example, the first stub and the second stub), the second group of microwave transmission lines includes at least one stub (for example, the first stub), and the filter and the coupler in the filter-coupler reuse the first stub of the first group of microwave transmission lines is used to describe a structure and a function of the filter-coupler in the signal transceiver. Herein, the filter in the filter-coupler may include the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines, where the first stub of the first group of microwave transmission lines may be connected to the second stub of the first group of microwave transmission lines, and the group of microwave transmission lines (that is, the first group of microwave transmission lines) including the connected stubs may be configured to implement a filtering function. The coupler in the filter-coupler may include the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines, where the first stub of the first group of microwave transmission lines of the filter-coupler may be coupled to the first stub of the second group of microwave transmission lines, and the pair of mutually coupled stubs may be configured to implement a coupling function. Using the foregoing function combination as an example, two ports connected to the first stub of the first group of microwave transmission lines in the filter-coupler may be separately connected to the signal transceiver circuit and the antenna, and are configured to transmit a signal between the signal transceiver circuit and the antenna. A port connected to the first stub of the second group of microwave transmission lines in the filter-coupler may be used as a coupled port to connect to the signal transceiver circuit, and is configured to: couple a part of the signal transmitted between the signal transceiver circuit and the antenna and transmit the part back to the signal transceiver circuit, so that the signal transceiver circuit (or another detection control circuit) can more accurately monitor and control a parameter (for example, power) of the signal transmitted between the signal transceiver circuit and the antenna. Herein, another port connected to the first stub of the second group of microwave transmission lines in the filter-coupler may be used as an isolated port to connect to an isolation resistor or another isolation circuit, or keep disconnected.

[0059] In this application, the filter-coupler in the signal transceiver may transmit a signal between the signal transceiver circuit and the wire, and the filter and the coupler in the filter-coupler may reuse one stub in one group of microwave transmission lines based on a specific application scenario, so that the coupler and the filter can be integrated, and a signal coupling function and a signal filtering function are implemented at the same time, to save layout space, improve product integration, and reduce costs. In this way, a structure is simple and applicability is strong.

[0060] In some feasible implementations, the signal transceiver may further include an amplification circuit. Refer to FIG. 8. FIG. 8 is a diagram of another structure of a signal transceiver according to an embodiment of this application. As shown in FIG. 8, the signal transceiver may include the filter-coupler, the signal transceiver circuit, the antenna, and an amplification circuit. The plurality of ports in the filter-coupler are separately configured to connect to the signal transceiver circuit, the antenna, and the amplification circuit, to implement a communication function of the signal transceiver.

[0061] In some feasible implementations, the filter-coupler in the signal transceiver may be configured to transmit a signal between the amplification circuit and the antenna. Herein, the amplification circuit may amplify a signal of the signal transceiver circuit. Herein, the filter-coupler may include at least two groups of microwave transmission lines and a plurality of ports. The filter-coupler may be connected to the signal transceiver circuit and the antenna through all or some of the plurality of ports. This may be specifically set based on an application scenario. It may be understood that the filter and the coupler in the filter-coupler may reuse at least one stub in at least one group of microwave transmission lines. In other words, the reused stub may be configured not only to filter a signal, but also to couple a signal. Further, it may be understood that, in different application scenarios, the filter-coupler may include a plurality of groups of microwave transmission lines (not limited to two groups), and any group of microwave transmission lines may include one or more stubs (not limited to one or more stubs).

[0062] A scenario in which the filter-coupler includes two groups of microwave transmission lines is used as an example. A first group of microwave transmission lines of the filter-coupler may include at least two stubs (for example, a first stub and a second stub), and a second group of microwave transmission lines may include at least one stub (for example, a first stub). Herein, using an example in which the filter and the coupler in the filter-coupler reuse the first stub of the first group of microwave transmission lines, two ports (for example, Port 1 and Port 2) connected to the first stub (for example, the stub A) of the first group of microwave transmission lines in the filter-coupler may be separately connected to the amplification circuit and the antenna, and are configured to transmit a signal between the amplification circuit and the antenna. A port (for example, Port 3) connected to the first stub (for example, the stub C) of the second group of microwave transmission lines in the filter-coupler may be used as a coupled port to connect to the signal transceiver circuit, and is configured to: couple a part of the signal transmitted between the amplification circuit and the antenna and transmit the part back to the signal transceiver circuit, so that the signal transceiver circuit (or another detection control circuit) can more accurately monitor and control a parameter (for example, power) of the signal transmitted between the amplification circuit and the antenna. Herein, another port (for example, Port 4) connected to the first stub (for example, the stub C) of the second group of microwave transmission lines in the filter-coupler may be used as an isolated port to connect to an isolation resistor or another isolation circuit, or keep disconnected.

[0063] Herein, the filter-coupler in the signal transceiver may transmit a signal between the amplification circuit and the wire, so that power of the signal transmitted by the filter-coupler is increased. The filter and the coupler in the filter-coupler may reuse one stub in one group of microwave transmission lines based on a specific application scenario, so that the coupler and the filter can be integrated, and a signal coupling function and a signal filtering function are implemented at the same time, to save layout space, improve product integration, and reduce costs. In this way, a structure is simple and applicability is strong.

[0064] In this application, in the filter-coupler, the coupler and the filter may be integrated, and a signal coupling function and a signal filtering function are implemented at the same time, to save layout space, improve product integration, and reduce costs. In this way, a structure is simple and applicability is strong.

[0065] The foregoing descriptions are merely specific implementations of the present invention, but are not intended to limit the protection scope of the present invention. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in the present invention shall fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A filter-coupler, wherein the filter-coupler comprises two groups of microwave transmission lines, a first group of microwave transmission lines comprises at least two stubs, a second group of microwave transmission lines comprises at least one stub, and a first stub of the first group of microwave transmission lines is connected to a second stub of the first group of microwave transmission lines; the filter of the filter-coupler comprises the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines, and is configured to filter a signal that passes through the first stub of the first group of microwave transmission lines; and the coupler of the filter-coupler comprises a first stub of the second group of microwave transmission lines and the first stub of the first group of microwave transmission lines, and is configured to couple the signal that passes through the first stub of the first group of microwave transmission lines to the first stub of the second group of microwave transmission lines.

2. The filter-coupler according to claim 1, wherein the first group of microwave transmission lines and the second group of microwave transmission lines are arranged at a same conductive layer, or the first group of microwave transmission lines and the second group of microwave transmission lines are separately arranged at two conductive layers.

3. The filter-coupler according to claim 2, wherein the first group of microwave transmission lines and the second group of microwave transmission lines are arranged at the same conductive layer, and the first stub of the first group of microwave transmission lines is parallel to the first stub of the second group of microwave transmission lines.

4. The filter-coupler according to claim 2, wherein the first group of microwave transmission lines is arranged at an upper conductive layer, the second group of microwave transmission lines is arranged at a lower conductive layer, and a projection of the first stub of the first group of microwave transmission lines at the conductive layer at which the second group of microwave transmission lines is located overlaps or is parallel to the first stub of the second group of microwave transmission lines.

5. The filter-coupler according to claim 2, wherein the first group of microwave transmission lines is arranged at a lower conductive layer, the second group of microwave transmission lines is arranged at an upper conductive layer, and a projection of the first stub of the second group of microwave transmission lines at the conductive layer at which the first group of microwave transmission lines is located overlaps or is parallel to the first stub of the first group of microwave transmission lines.

6. The filter-coupler according to any one of claims 1 to 5, wherein the filter of the filter-coupler comprises a first-order filter or a multi-order filter, and the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines are stubs in the filter.

7. The filter-coupler according to any one of claims 1 to 6, wherein the first stub of the first group of microwave transmission lines reflects inductance at a working frequency, and the second stub of the first group of microwave transmission lines reflects capacitance at the working frequency.

8. The filter-coupler according to any one of claims 1 to 7, wherein the first group of microwave transmission lines further comprises a third stub, and the first stub of the first group of microwave transmission lines and the third stub of the first group of microwave transmission lines are separately connected to the second stub of the first group of microwave transmission lines; and the first stub of the first group of microwave transmission lines reflects inductance at the working frequency, and the second stub of the first group of microwave transmission lines and the third stub of the first group of microwave transmission lines reflect capacitance at the working frequency; or the first stub of the first group of microwave transmission lines and the second stub of the first group of microwave transmission lines reflect inductance at the working frequency, and the third stub of the first group of microwave transmission lines reflects capacitance at the working frequency.

9. The filter-coupler according to claims 1 to 8, wherein a spacing between the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines is less than or equal to 10 mil.

10. The filter-coupler according to claims 1 to 9, wherein the first stub of the first group of microwave transmission lines, the second stub of the first group of microwave transmission lines, and the third stub of the first group of microwave transmission lines form the filter of the filter-coupler; and the first stub of the first group of microwave transmission lines and the first stub of the second group of microwave transmission lines form the coupler of the filter-coupler.

11. The filter-coupler according to claim 10, wherein the first stub of the first group of microwave transmission lines, the second stub of the first group of microwave transmission lines, the third stub of the first group of microwave transmission lines, and the first stub of the second group of microwave transmission lines meet at least one of the following conditions: a length of the first stub of the first group of microwave transmission lines is 0.035λ to 0.059λ and / or a width of the first stub of the first group of microwave transmission lines is 0.0016λ to 0.0026λ; a length of the second stub of the first group of microwave transmission lines is 0.52λ to 0.86λ and / or a width of the second stub of the first group of microwave transmission lines is 0.00375λ to 0.0063λ; a length of the third stub of the first group of microwave transmission lines is 0.03λ to 0.05λ and / or a width of the third stub of the first group of microwave transmission lines is 0.09λ to 0.15λ; and a length of the first stub of the second group of microwave transmission lines is 0.032λ to 0.054λ and / or a width of the first stub of the second group of microwave transmission lines is 0.0075λ to 0.0125λ, wherein λ is a wavelength of a signal transmitted by the filter-coupler.

12. The filter-coupler according to claims 1 to 11, wherein a shape of the stub comprises but is not limited to a square, an arc, a parallelogram, an L shape, or a U shape.

13. The filter-coupler according to claims 1 to 12, wherein the filter-coupler further comprises a plurality of ports, and the ports are separately connected to the stubs in the filter-coupler, and are configured to transmit signals.

14. A signal transceiver, wherein the signal transceiver comprises the filter-coupler according to any one of claims 1 to 13, a signal transceiver circuit, and an antenna, and the plurality of ports in the filter-coupler are separately configured to connect to the signal transceiver circuit and the antenna, to implement a communication function of the signal transceiver.

15. The transceiver according to claim 14, wherein one port connected to the first stub of the first group of microwave transmission lines in the filter-coupler is configured to connect to the signal transceiver circuit, another port connected to the first stub of the first group of microwave transmission lines in the filter-coupler is configured to connect to the antenna, one port connected to the first stub of the second group of microwave transmission lines in the filter-coupler is configured to connect to the signal transceiver circuit, and another port connected to the first stub of the second group of microwave transmission lines in the filter-coupler is configured to serve as an isolated port.

16. The signal transceiver according to claim 14 or 15, wherein the signal transceiver further comprises an amplification circuit, and the plurality of ports in the filter-coupler are separately configured to connect to the signal transceiver circuit, the antenna, and the amplification circuit, to implement the communication function of the signal transceiver.

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