Equalizer, ultra wide band system and digital collector

Abstract

The invention discloses an equalizer, an ultra-wideband system and a digital collector, and relates to the technical field of equalizers. The equalizer comprises a first transmission line, a second transmission line and an absorption load, the first transmission line is used for transmitting a total signal, the second transmission line and the first transmission line are arranged at an interval and used for forming a coupling signal, and the second transmission line is electrically connected with a plurality of open-circuit branches arranged at intervals. The electrical length of the open-circuit branch knot is odd times of one fourth of the wavelength corresponding to the frequency in the frequency band of the total signal, and the open-circuit branch knot is used for adjusting the intensity of a certain frequency band of the total signal so that the signal of the frequency band can be reversely coupled back to the first transmission line to be overlapped with the total signal. The absorption load is used for consuming the coupling signal transmitted to the absorption load by the second transmission line, so that the signal of only partial frequency band can be reversely coupled to the first transmission line to be superposed with the total signal, the signal of wider frequency band can be adjusted, and the design structure is simple.

Description

Technical Field

[0001] The present application relates to the technical field of equalizers, and in particular to an equalizer, an ultra-wideband system and a digital collector. Background Art

[0002] The rate of high-speed signal transmission is getting faster and faster, and the bandwidth requirements for the entire system are getting higher and higher. For ultra-wideband systems, when the total signal passes through active or passive devices in the link, it is difficult to keep the amplitude-frequency response in the passband flat. Generally, signals with higher frequencies suffer greater losses than signals with lower frequencies, resulting in the strength of signals with higher frequencies being lower than that of signals with lower frequencies. The strengths of signals with different frequencies vary greatly, making the flatness of the total signal poor. The total signal fluctuates greatly at the front end of the link of the ultra-wideband system, which is not conducive to the reception of the total signal and easily leads to problems such as a decrease in the transmission rate and transmission quality of the total signal or communication interruption.

[0003] An equalizer is usually set at the front end of the link to adjust the flatness of the total signal, avoiding the need to set calibration software at the back end of the link, which leads to the problem of increasing the carrying power of the back-end link. The equalizer includes a transmission main line for transmitting the total signal, and multiple open branches are led out from the transmission main line, so that the transmission main line and the multiple open branches form a resonant notch unit, which can adjust the frequency near the resonant frequency of the open branches and the transmission main line, but the width of the adjusted frequency band is limited, and the multiple open branches need to be designed with multi-stage matching, introducing more impedance discontinuities, resulting in a larger overall size of the equalizer and a higher design difficulty. If a coupling line is designed near the transmission main line, so that the coupling line couples the total signal transmitted by the transmission main line, the phase difference between the coupling signal generated by the coupling line and the total signal is adjusted, and the signal cancellation between the coupling signal and the total signal is achieved, the intensity of a specific frequency can be adjusted, but there is also the problem of limited width of the adjusted frequency band. Summary of the invention

[0004] The present application provides an equalizer, an ultra-wideband system and a digital collector. By setting a coupled transmission line with multiple open branches, the equalizer can adjust signals in a wider frequency band, and the design structure is simple, which is conducive to realizing the miniaturization of the equalizer and facilitates circuit integration.

[0005] In a first aspect, the present application provides an equalizer, comprising: a first transmission line for transmitting a total signal; a second transmission line, spaced apart from the first transmission line, with two ends of the first transmission line arranged opposite to each other in a first direction, and two ends of the second transmission line arranged opposite to each other in the first direction; a plurality of open branches, located on a side of the second transmission line away from the first transmission line, the extension direction of the plurality of open branches is a second direction, an angle is formed between the first direction and the second direction, one end of each of the open branches is electrically connected to the second transmission line, the plurality of open branches are spaced apart along the first direction, and the electrical length of the open branches is an odd multiple of one quarter of the wavelength corresponding to the frequency in the frequency band of the total signal; an absorption load, electrically connected to the second transmission line, for consuming the signal transmitted from the second transmission line to the absorption load.

[0006] By electrically connecting the second transmission line to multiple open-circuit branches, and the electrical length of the open-circuit branches is an odd multiple of one-quarter of the wavelength corresponding to the frequency in the frequency band of the total signal, part of the frequency reflected by the open-circuit branches can be coupled back to the first transmission line, and the phase of the partial frequency signal after being coupled back to the first transmission line is the same as the phase of the partial frequency signal in the first transmission line, so that the anti-coupling signal and the total signal can be superimposed, thereby enabling the open-circuit branches to adjust the intensity of the partial frequency signal of the main signal; at the same time, the number of open-circuit branches is multiple, and the multiple open-circuit branches can adjust signals of multiple different frequencies, thereby achieving the adjustment of the intensity of multiple frequency signals. The design method is relatively simple, and can meet the equalizer's needs for adjusting signals in a wider frequency band.

[0007] In a possible implementation, the first transmission line includes a first coupling section, the second transmission line includes a second coupling section, the first coupling section and the second coupling section are spaced apart in the second direction, the electrical length of the first coupling section is equal to the electrical length of the second coupling section, and the plurality of open branches are connected to the second coupling section. By connecting the plurality of open branches to the second coupling section, the coupled electrical signal reflected by the open branches can pass through the second coupling section, so that the reflected coupled electrical signal can be reversely coupled back to the first transmission line.

[0008] In a possible implementation manner, the electrical length of the second coupling section is an odd multiple of one quarter of the wavelength corresponding to the frequency in the frequency band of the total signal. By making the electrical length of the second coupling section an odd multiple of one quarter of the wavelength corresponding to the frequency in the frequency band of the total signal, it is beneficial to control the phase of the anti-coupling signal of the first transmission line, and realize the open-circuit branch to adjust the intensity of the frequency signal of the main signal part.

[0009] In a possible implementation, the electrical length of the first transmission line is greater than the electrical length of the first coupling section, and the electrical length of the second transmission line is equal to the electrical length of the second coupling section. By making the electrical length of the first transmission line greater than the electrical length of the first coupling section, both ends of the first transmission line can be extended to other devices on the link, so that the equalizer can be electrically connected to other devices; by making the electrical length of the second transmission line equal to the electrical length of the second coupling section, the second transmission line is coupled to the first transmission line as a whole, which is conducive to improving the utilization rate of the second transmission line.

[0010] In a possible implementation manner, different open-circuit branches have different electrical lengths, so that different open-circuit branches correspond to different frequencies.

[0011] In one possible implementation, the frequency band of the total signal includes a first frequency and a second frequency, the open branches include a first open branch and a second open branch, the first open branch and the second open branch are adjacent, the electrical length of the first open branch is an odd multiple of one-quarter wavelength of the first frequency, and the electrical length of the second open branch is an odd multiple of one-quarter wavelength of the second frequency; the electrical length between the first open branch and the second open branch is an odd multiple of one-quarter wavelength of the center frequencies of the first frequency and the second frequency.

[0012] In a possible implementation, the electrical length of the open-circuit branch is one-fourth of the wavelength corresponding to the frequency in the frequency band of the total signal. By making different open-circuit branches have different electrical lengths, so that different open-circuit branches correspond to different adjustment frequency bands, multiple open-circuit branches can be set to achieve the adjustment of the signal strength of multiple frequency bands. The design method is relatively simple, which is conducive to meeting the equalizer's demand for adjusting signals in a wider frequency band.

[0013] In a possible implementation, the absorption load is provided at both ends of the second transmission line. By providing absorption loads at both ends of the second transmission line that are opposite to each other, both ends of the second transmission line can consume the coupled signal, thereby improving the uniformity of the absorption load in absorbing the coupled electrical signal transmitted by the second transmission line.

[0014] In a possible implementation, the equalizer further includes a circuit board, the first transmission line, the second transmission line, and the plurality of open branches are all printed on the circuit board, and the absorption load is electrically connected to the circuit board. By printing the first transmission line, the second transmission line, and the plurality of open branches on the circuit board, the absorption load is electrically connected to the circuit board, and the absorption load is electrically connected to the second transmission line, it is convenient to realize the integration of the first transmission line, the second transmission line, and the plurality of open branches on the circuit board, simplify the design structure of the equalizer, and make the design of each structure in the equalizer more compact, which is convenient to realize the demand for miniaturization of the equalizer.

[0015] In a second aspect, the present application further provides an ultra-wideband system, comprising a signal source and an equalizer as described in any one of the embodiments of the first aspect, wherein the signal source is used to input a total signal to a first transmission line of the equalizer. The beneficial effects of this embodiment are similar to those of the above embodiment, and will not be described in detail in this embodiment.

[0016] In the third aspect, the present application also provides a digital collector, including an input buffer module, a variable gain amplifier, an A / D conversion module, a control processing module, an input module and the ultra-wideband system described in the second aspect, the output end of the ultra-wideband system is connected to the input buffer module, the output end of the input buffer module is connected to the variable gain amplifier, the variable gain amplifier is connected to the A / D conversion module, the A / D conversion module is connected to the control processing module, and the input module is connected to the control processing module. The beneficial effects corresponding to the above embodiments are similar in this embodiment and will not be repeated in this embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an equalizer provided in an embodiment of the present application, in which a first transmission line and a second transmission line both extend along a straight line;

[0018] Figure 2 is a schematic diagram of a structure in which the first transmission line and the second transmission line in the equalizer provided in an embodiment of the present application are both bent;

[0019] Figure 3 It is a schematic diagram of a structure in which a first transmission line and a second transmission line are both discontinuously coupled in an equalizer provided in an embodiment of the present application;

[0020] Figure 4 It is a schematic diagram of a structure in which the width of the second transmission line is relatively narrow in the equalizer provided in an embodiment of the present application;

[0021] Figure 5 is a system schematic diagram of an ultra-wideband system provided in an embodiment of the present application;

[0022] Figure 6 It is a system schematic diagram of a digital collector provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0024] For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of the present application are explained and described below.

[0025] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0026] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0027] It should be understood that the term "and / or" used in this article is only a description of the same field of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0028] The word "if" as used herein may be interpreted as "when" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0029] It should be understood that the terms “first”, “second”, etc. used in the present application are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

[0030] In the description of the present application, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] When used in this application, “within the range of…”, unless it is separately specified that an end value is not included, it is assumed that both end values ​​of the range are included. For example, in the range of 1 to 5, the two values ​​1 and 5 are included.

[0032] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] It should be understood that in this application, "electrical connection" can be understood as physical contact and electrical conduction between components; it can also be understood as the form in which different components in the circuit structure are connected through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals. "Connection" and "connected" can both refer to a mechanical connection relationship or a physical connection relationship. For example, A is connected to B or A is connected to B, which means that there is a fastening member (such as a screw, bolt, rivet, etc.) between A and B, or A and B are in contact with each other and A and B are difficult to separate.

[0034] In this application, "length" can be understood as the physical length of an object or the electrical length. The electrical length can be expressed as the ratio of the physical length (i.e., mechanical length or geometric length) multiplied by the transmission time of an electrical or electromagnetic signal in a medium to the time required for the signal to pass the same distance as the physical length of the medium in free space. The electrical length can satisfy the following formula:

[0035]

[0036] Where L is the physical length, a is the transmission time of the electrical or electromagnetic signal in the medium, and b is the transmission time in free space.

[0037] Alternatively, electrical length can also refer to the ratio of physical length (i.e. mechanical length or geometric length) to the wavelength of the transmitted electromagnetic wave. The electrical length can satisfy the following formula:

[0038]

[0039] Where L is the physical length and λ is the wavelength of the electromagnetic wave.

[0040] Coupling: refers to the phenomenon that there is close coordination and mutual influence between the input and output of two or more circuit elements or electrical networks, and energy is transmitted from one side to the other through interaction.

[0041] The present application provides an equalizer 100, referring to Figure 1 As shown, Figure 1The schematic diagram of the structure of an equalizer 100 in the present application is shown. The equalizer 100 includes a first transmission line 11 and a second transmission line 12, wherein the first transmission line 11 is used as a main transmission line for transmitting a total signal; and the second transmission line 12 is used as a coupling transmission line for coupling the total signal transmitted by the first transmission line 11, so that a coupled signal is formed in the second transmission line 12.

[0042] The first transmission line 11 passes a broadband signal, and the total signal transmitted by the first transmission line 11 is an electrical signal. The second transmission line 12 is spaced apart from the first transmission line 11, and the second transmission line 12 is close to the first transmission line 11. Both ends of the first transmission line 11 are connected in the first direction ( Figure 1 The two ends of the second transmission line 12 are relatively arranged in the first direction, and the two ends of the second transmission line 12 are relatively arranged in the first direction, so that at least a partial area between the two ends of the second transmission line 12 and at least a partial area between the two ends of the first transmission line 11 form a coupling structure. When the total signal passes through the first transmission line 11, since the total signal itself carries an electric field and a magnetic field, and the distance between the second transmission line 12 and the first transmission line 11 is relatively close, the second transmission line 12 and the first transmission line 11 form an electromagnetic coupling structure, which has both capacitive coupling and inductive coupling, that is, the second transmission line 12 will generate a coupling signal, so as to realize the extraction of the total signal transmitted by the first transmission line 11.

[0043] The plurality of open branches 13 are located on a side of the second transmission line 12 away from the first transmission line 11, and the extension direction of the plurality of open branches 13 is the second direction ( Figure 1 The second direction and the first direction form an angle, and the size of the angle is set according to actual needs, which is not limited in this application.

[0044] One end of each open branch 13 is electrically connected to the second transmission line 12, one end of each open branch 13 can be connected and electrically connected to the second transmission line 12, and the other end is an isolated port. The connection points between the multiple open branches 13 and the second transmission line 12 are located between the two ends of the second transmission line 12, and the multiple open branches 13 are arranged at intervals along the first direction, so that the multiple open branches 13 can all generate open-circuit reflection; at the same time, when the open branches 13 are connected to the ends of the second transmission line 12, the open branches 13 are prevented from affecting the coupling of the second transmission line 12 to the first transmission line 11 signal, ensuring that the coupling signal generated by the second transmission line 12 has a good strength.

[0045] Since the open branch 13 is electrically connected to the second transmission line 12, the coupling signal in the second transmission line 12 can be transmitted to the open branch 13. The resistance of the open branch 13 is close to infinity at the frequency corresponding to the branch line length. When the coupling signal is transmitted to the open branch 13, open-circuit reflection can occur, and all the energy of the coupling signal transmitted to the open branch 13 is reflected back. Multiple open branches 13 are arranged at intervals, which is conducive to ensuring that the open branches 13 have a higher reflectivity for the coupling signal within a relatively wide bandwidth, avoiding interference between multiple open branches 13, resulting in a decrease in the reflectivity of the open branches 13 for the coupling signal, thereby affecting the equalizer 100's adjustment of the total signal.

[0046] The second transmission line 12 is electrically connected to the absorption load 14, and the coupling signal in the second transmission line 12 can be transmitted to the absorption load 14. The absorption load 14 is used to consume the coupling signal transmitted from the second transmission line 12 to the absorption load 14, so that the coupling signal in the second transmission line 12 that is not reflected by the open branch 13 is absorbed by the absorption load 14. The coupling signal absorbed by the absorption load 14 cannot be coupled back to the first transmission line 11, so that the intensity of the signal in the first transmission line 11 that is not reflected by the open branch 13 is reduced, and the intensity of the signal reflected by the open branch 13 remains unchanged, thereby realizing the adjustment of the intensity of signals of different frequency bands in the total signal transmitted by the first transmission line 11.

[0047] In one embodiment, the absorption load 14 is connected and electrically connected to the end of the second transmission line 12 to provide a connection position for the arrangement of multiple open branches 13 on the second transmission line 12, thereby ensuring the reflectivity of the open branches 13 to the coupled signal. The absorption load 14 can be arranged at both ends of the second transmission line 12, so that both ends of the second transmission line 12 can consume the coupled signal, thereby improving the uniformity of the absorption load 14 absorbing the coupled electrical signal transmitted by the second transmission line 12.

[0048] The frequency band of the total signal includes multiple frequencies, and a single open-circuit branch 13 is used to adjust the signal of a certain frequency band, which is the adjustment frequency band and is located within the frequency band of the total signal. When the open-circuit branch 13 adjusts the adjustment frequency band, the open-circuit branch 13 reflects the signal of the adjustment frequency band back to the second transmission line 12, and couples it back to the first transmission line 11, so that the intensity of the signal of the adjustment frequency band in the total signal transmitted by the first transmission line 11 remains unchanged, and other signals outside the adjustment frequency band are consumed by the absorption load 14 on the second transmission line 12 and cannot be coupled back to the first transmission line 11, so that the intensity of the signals of other frequencies outside the adjustment frequency band is weakened.

[0049] In one embodiment, the first transmission line 11 transmits a total signal; the second transmission line 12 couples the total signal of the first transmission line 11, so that a coupled signal is generated in the second transmission line 12, and the coupled signal is transmitted to the open branch 13 through the second transmission line 12. The open branch 13 reflects all the signals of the adjustment frequency band back to the second transmission line 12, and the coupled signal not reflected by the open branch 13 is consumed by the absorption load 14; the first transmission line 11 reversely couples the coupled signal transmitted by the second transmission line 12, so that the signal of the adjustment frequency band reflected by the open branch 13 is reversely coupled back to the first transmission line 11. After the signal of the adjustment frequency band reflected by the open branch 13 is reversely coupled back to the first transmission line 11, the phase of the reversely coupled signal is the same as the phase of the total signal, so that the strength of the signal of the adjustment frequency band in the total signal transmitted by the first transmission line 11 remains unchanged, and the strength of the signals of other frequencies outside the adjustment frequency band is weakened.

[0050] Exemplarily, the phase of the coupled electrical signal of the second transmission line 12 is The phase of the coupled electrical signal after being transmitted from the coupling region of the second transmission line 12 and the first transmission line 11 to the connection between the open branch 13 and the second transmission line 12 is The phase after encountering the reverse direction of the open-circuit branch 13 is The phase after being transmitted from the connection between the open branch 13 and the second transmission line 12 to the coupling region between the second transmission line 12 and the first transmission line 11 and then reversely coupled is That is, the phase after anti-coupling is Make The phase of the anti-coupling signal can be made the same as the phase of the total signal transmitted by the first transmission line 11 by being an integer multiple of 2π.

[0051] A single open branch 13 is used to adjust the signal in the adjustment frequency band, the center frequency of the adjustment frequency band is the adjustment frequency, that is, the adjustment frequency is the frequency in the frequency band of the total signal, and the electrical length of the single open branch 13 is an odd multiple of one quarter of the wavelength corresponding to the adjustment frequency, so that the phase of the coupled electrical signal increases by π after encountering the reverse direction of the open branch 13, which is convenient for regulating the phase of the anti-coupled signal of the first transmission line 11, so that the phase of the anti-coupled signal is the same as the phase of the total signal direction transmitted by the first transmission line 11.

[0052] Multiple open branches 13 are used to adjust signals under multiple adjustment frequency bands. The multiple adjustment frequency bands corresponding to the multiple open branches 13 are all within the frequency range of the total signal, and the adjustment frequency bands corresponding to different open branches 13 are different, so that the multiple open branches 13 can adjust signals under multiple frequencies, thereby realizing the requirement that the equalizer 100 can adjust signals in a wider frequency band.

[0053] When the total signal passes through active devices or passive devices in the link, the signal with a larger frequency suffers a greater loss than the signal with a smaller frequency, resulting in the strength of the signal with a larger frequency being lower than the strength of the signal with a smaller frequency. Multiple open branches 13 are made to correspond to the signal with a larger frequency. The open branches 13 reflect the signal with a larger frequency back to the second transmission line 12, and the signal with a smaller frequency is consumed by the absorption load 14, so that the signal with a larger frequency can be coupled back to the first transmission line 11, and the signal with a smaller frequency cannot be coupled back to the first transmission line 11. The phase of the signal with a larger frequency coupled back to the first transmission line 11 is the same as the phase of the signal transmitted in the first transmission line 11, so that the strength of the signal with a larger frequency remains unchanged, and the signal with a smaller frequency cannot be coupled back to the first transmission line 11, resulting in the strength of the signal with a smaller frequency being reduced, thereby achieving a balance between the strength of the signal with a larger frequency and the strength of the signal with a smaller frequency, improving the uniformity of the strength of each frequency signal in the total signal, and increasing the flatness of the total signal.

[0054] The wavelength of a signal with a larger frequency is shorter than that of a signal with a smaller frequency, and the electrical length of the open branch 13 is an odd multiple of one quarter of the wavelength corresponding to the frequency adjustment thereof. When a plurality of open branches 13 correspond to a signal with a larger frequency, the electrical lengths of the plurality of open branches 13 are shorter, which is beneficial to reducing the overall volume of the equalizer 100, realizing the requirement of miniaturization of the equalizer 100, and making the equalizer 100 convenient for circuit integration.

[0055] The multiple open branches 13 all extend from the second transmission line 12 in a direction away from the first transmission line 11, that is, the multiple open branches 13 are all located on the side of the second transmission line 12 away from the first transmission line 11, thereby preventing the arrangement of the open branches 13 from affecting the coupling relationship between the first transmission line 11 and the second transmission line 12. In one embodiment, the multiple open branches 13 all extend along a straight line, and the extension direction of the multiple open branches 13 is perpendicular to the extension direction of the coupling section of the second transmission line 12 and the first transmission line 11; or, the multiple open branches 13 extend along a curve, so that in the direction from the first transmission line 11 to the second transmission line 12, the electrical length of the open branches 13 is reduced, which is conducive to further reducing the overall volume of the equalizer 100.

[0056] The equalizer 100 provided in the present application includes a first transmission line 11 and a second transmission line 12. The first transmission line 11 is used to transmit a total signal. The second transmission line 12 is coupled to the first transmission line 11 so that a coupled signal is formed in the second transmission line 12. The absorption load 14 is electrically connected to the second transmission line 12 and is used to absorb the coupled electrical signal in the second transmission line 12. By connecting and electrically connecting the second transmission line 12 to a plurality of open branches 13 arranged at intervals, the coupled electrical signal at a partial frequency of the second transmission line 12 can be reflected by the open branches 13, so that the partial frequency reflected by the open branches 13 can be reversely coupled back to the first transmission line 11. The phase of the partial frequency signal after being reversely coupled back to the first transmission line 11 is the same as the phase of the partial frequency signal in the first transmission line 11, so that the reverse coupling signal and the total signal can be superimposed, and the open branches 13 can adjust the strength of the partial frequency signal of the main signal.

[0057] There are multiple open branches 13, and multiple open branches 13 can adjust signals of multiple different frequencies. By setting the number of open branches 13 connected to the second transmission line 12, the intensity of multiple frequency signals can be adjusted. The design method is relatively simple and can meet the needs of the equalizer 100 for adjusting signals in a wider frequency band. At the same time, the electrical length of the open branch 13 is an odd multiple of one quarter of the wavelength corresponding to the signal frequency it adjusts, so that the open branch 13 can adjust signals with larger frequencies, which is beneficial to reducing the electrical length of the open branch 13, reducing the overall volume of the equalizer 100, meeting the needs of miniaturization of the equalizer 100, and making the equalizer 100 easy to integrate into circuits.

[0058] In a possible implementation, after the signal of the regulation frequency band reflected by the open-circuit branch 13 is reversely coupled back to the first transmission line 11, the phase of the reversely coupled signal is opposite to the phase of the total signal, so that the strength of the signal of the regulation frequency band in the total signal transmitted by the first transmission line 11 is reduced, and the strength of the signals of other frequencies outside the regulation frequency band is also reduced, and the reduction amplitude of the signal strength of the regulation frequency band is greater than the reduction amplitude of the signal strength of other frequencies outside the regulation frequency band.

[0059] Exemplarily, the phase of the coupled electrical signal of the second transmission line 12 is The phase of the coupled electrical signal after being transmitted from the coupling region of the second transmission line 12 and the first transmission line 11 to the connection between the open branch 13 and the second transmission line 12 is The phase after encountering the reverse direction of the open-circuit branch 13 is The phase after being transmitted from the connection between the open branch 13 and the second transmission line 12 to the coupling region between the second transmission line 12 and the first transmission line 11 and then reversely coupled is That is, the phase after anti-coupling is Make An odd multiple of π can make the phase of the anti-coupling signal opposite to the phase of the total signal transmitted by the first transmission line 11 .

[0060] At this time, the electrical length of a single open branch 13 is still an odd multiple of one quarter of the wavelength corresponding to the adjustment frequency, so that the phase of the coupled electrical signal increases by π after encountering the reverse direction of the open branch 13, which is convenient for regulating the phase of the anti-coupled signal of the first transmission line 11, so that the phase of the anti-coupled signal is opposite to the phase of the total signal direction transmitted by the first transmission line 11.

[0061] The open branch 13 is used to adjust the frequency with higher intensity in the total signal transmitted by the first transmission line 11, so as to weaken the frequency with higher intensity in the total signal transmitted by the first transmission line 11, improve the uniformity of the intensity of each frequency signal in the total signal, and further improve the flatness of the total signal.

[0062] For a possible implementation, see Figure 1 The first transmission line 11 includes a first coupling section, the second transmission line 12 includes a second coupling section, and the first coupling section and the second coupling section are arranged at intervals in the second direction so that the first coupling section and the second coupling section form an electromagnetic coupling structure. A plurality of open branches 13 are connected to the second coupling section, so that the plurality of open branches 13 are connected to the coupling area of ​​the second transmission line 12 and the first transmission line 11, so that the coupling electrical signal reflected by the open branches 13 can be reversely coupled back to the first transmission line 11, so that the open branches 13 can adjust the strength of the main signal transmitted by the first transmission line 11.

[0063] The electrical length of the first transmission line 11 is greater than the electrical length of the first coupling section, so that both ends of the first transmission line 11 can extend to other devices on the link, so that the equalizer 100 can be electrically connected to other devices. Figure 2 The first transmission line 11 may extend in a straight line or be bent to reduce the space occupied by the first transmission line 11 and meet the requirement of miniaturization of the equalizer 100 .

[0064] See also Figure 3 The first coupling section can be a continuously extending region on the first transmission line 11, or multiple regions on the first transmission line 11, so that the regions with multiple intervals on the first transmission line 11 are spaced apart and coupled with the second transmission line 12 in the second direction, and the multiple intervals together constitute the first coupling section. At this time, the electrical length of the first coupling section is the sum of the electrical lengths of the multiple intervals; similarly, the second coupling section can be a continuously extending end region on the second transmission line 12, or multiple regions on the second transmission line 12.

[0065] The electrical length of the first coupling section is equal to the electrical length of the second coupling section, so that the second coupling section of the second transmission line 12 is coupled with the first coupling section of the first transmission line 11, and the first coupling section of the first transmission line 11 is anti-coupled with the second coupling section of the second transmission line 12, and the electrical length of the coupling region and the electrical length of the anti-coupling region are equal and corresponding.

[0066] See also Figure 4 The width of the second coupling section can be the same as or different from the width of the first coupling section, and should be set according to actual needs. When the spacing distance between the second coupling section and the first coupling section decreases and the width of the second coupling section decreases, the coupling strength of the second coupling section to the first coupling section increases; when the spacing distance between the second coupling section and the first coupling section increases and the width of the second coupling section increases, the coupling strength of the second coupling section to the first coupling section decreases.

[0067] In one embodiment, see Figure 1 , the first transmission line 11 and the second transmission line 12 are both extended in a straight line, the first coupling section is a section of the first transmission line 11 that extends continuously, the second coupling section is a section of the second transmission line 12 that extends continuously, and the electrical length of the second transmission line 12 is equal to the electrical length of the second coupling section, so that the second transmission line 12 is coupled to the first transmission line 11 as a whole, and at this time, a plurality of open branches 13 are connected to the area between the two ends of the second transmission line 12, and two absorption loads 14 are respectively provided at the two ends of the second transmission line 12, which is conducive to simplifying the design structure of the equalizer 100, improving the utilization rate of the second transmission line 12, reducing the occupied space of the second transmission line 12, and realizing the miniaturization requirement of the equalizer 100; at the same time, the open branches 13 and the absorption load 14 have a certain spacing distance, so that the coupled electrical signal reflected by the open branches 13 can pass through the second coupling section, so that the reflected coupled electrical signal can be reversely coupled back to the first transmission line 11.

[0068] In a possible implementation, the electrical length of the second coupling section is an odd multiple of one quarter of the wavelength corresponding to the center frequency of the total signal frequency band transmitted by the first transmission line 11. There is no necessary connection between the electrical length of the open branch 13 and the electrical length of the second transmission line 12, that is, under appropriate setting conditions, the electrical length of the open branch 13 can be greater than the electrical length of the second transmission line 12.

[0069] For a possible implementation, see Figure 1 Different open branches 13 have different electrical lengths, so that different open branches 13 correspond to different adjustment frequency bands. By setting multiple open branches 13, the signal strength of multiple frequency bands can be adjusted. The design method is relatively simple, which is conducive to realizing the equalizer 100's demand for adjusting a wider frequency band signal.

[0070] Exemplarily, the total signal transmitted by the first transmission line 11 includes a first signal in a first frequency band and a second signal in a second frequency band, and the strengths of the first signal and the second signal need to be balanced. The center frequency of the first frequency band is the first frequency, and the center frequency of the second frequency band is the second frequency. The open branch 13 includes a first open branch 13 and a second open branch 13. The first open branch 13 is used to adjust the first signal, and the electrical length of the first open branch 13 is an odd multiple of one quarter of the wavelength corresponding to the first frequency; the second open branch 13 is used to adjust the second signal, and the electrical length of the second open branch 13 is an odd multiple of one quarter of the wavelength corresponding to the second frequency. If the first frequency is greater than the second frequency, the electrical length of the first open branch 13 is different from the electrical length of the second open branch 13.

[0071] In the transmission direction of the coupled signal in the second transmission line 12, the spacing distance between the first open branch 13 and the second open branch 13 is an odd multiple of one quarter of the wavelength corresponding to the average frequency of the first frequency and the second frequency, which is beneficial to avoid interference between the first open branch 13 and the second open branch 13.

[0072] In one embodiment, the electrical length of the open branch 13 is one quarter of the wavelength corresponding to the frequency band of the open branch 13, which is conducive to shortening the electrical length of the open branch 13, reducing the space occupied by the first transmission line 11, and realizing the miniaturization requirement of the equalizer 100. Figure 1 In the transmission direction of the coupled signal in the second transmission line 12, the electrical lengths of the multiple open branches 13 can be increased sequentially, so that the frequencies of the signals corresponding to the multiple open branches 13 are increased sequentially, thereby simplifying the arrangement of the multiple open branches 13.

[0073] When the electrical length of the first open branch 13 is one quarter of the wavelength corresponding to the first frequency, and the electrical length of the second open branch 13 is one quarter of the wavelength corresponding to the second frequency, since the first frequency is greater than the second frequency, the wavelength corresponding to the first frequency is smaller than the wavelength corresponding to the second frequency, and the electrical length of the first open branch 13 is smaller than the electrical length of the second open branch 13.

[0074] For a possible implementation, see Figure 1 The equalizer 100 also includes a circuit board 10, a first transmission line 11, a second transmission line 12 and a plurality of open branches 13 are all printed on the circuit board 10, an absorption load 14 is electrically connected to the circuit board 10, and the absorption load 14 is electrically connected to the second transmission line 12, which is conducive to the integration of the first transmission line 11, the second transmission line 12 and the plurality of open branches 13 on the circuit board 10, simplifies the design structure of the equalizer 100, and makes the design of each structure in the equalizer 100 more compact, which is conducive to realizing the demand for miniaturization of the equalizer 100.

[0075] The present application also provides an ultra-wideband system 200, see Figure 5 The ultra-wideband system 200 includes a signal source and the equalizer 100 described in any one of the above embodiments, the signal source is electrically connected to the equalizer 100, and the signal source is used to input the total signal to the first transmission line 11 of the equalizer 100.

[0076] In one embodiment, the ultra-wideband system 200 further includes an amplifier and a digital signal processing module, both of which are electrically connected to the equalizer 100. The signal source first inputs a total signal to the amplifier, and the total signal amplified by the amplifier is adjusted by the equalizer 100 and then input to the digital signal processing module for signal processing. The ultra-wideband system 200 may also include a sample holder and an analog-to-digital converter. After the total signal is adjusted by the equalizer 100, it is first divided into multiple signals by the sample holder, and then converted by the analog-to-digital converter to realize analog-to-digital conversion, so that the signal can be read in the digital signal processing module.

[0077] It can be understood that the ultra-wideband system 200 in this embodiment has the equalizer 100 in the above embodiment. Therefore, the ultra-wideband system 200 in this embodiment has all the technical effects of the equalizer 100 in the above embodiment. Since the technical effects of the equalizer 100 have been fully explained in the above embodiment, they will not be repeated here.

[0078] This application also provides a digital collector, see Figure 6 , including the above-mentioned ultra-wideband system 200 and an input buffer module, a variable gain amplifier, an A / D conversion module, a control processing module and an input module, the output end of the ultra-wideband system 200 is connected to the input buffer module, the output end of the input buffer module is connected to the variable gain amplifier, the variable gain amplifier is connected to the A / D conversion module, the A / D conversion module is connected to the control processing module, and the input module is connected to the control processing module.

[0079] It can be understood that the digital collector in this embodiment has the ultra-wideband system 200 in the above embodiment. Therefore, the digital collector in this embodiment has all the technical effects of the ultra-wideband system 200 in the above embodiment. Since the technical effects of the ultra-wideband system 200 have been fully explained in the above embodiment, they will not be repeated here.

[0080] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An equalizer, characterized in that: include: A first transmission line, used for transmitting a total signal; A second transmission line is arranged at an interval from the first transmission line, two ends of the first transmission line are arranged opposite to each other in a first direction, and two ends of the second transmission line are arranged opposite to each other in the first direction; A plurality of open branches are located on a side of the second transmission line away from the first transmission line, the extension direction of the plurality of open branches is a second direction, an angle is formed between the first direction and the second direction, one end of each of the open branches is electrically connected to the second transmission line, the plurality of open branches are arranged at intervals along the first direction, and the electrical length of the open branches is an odd multiple of one quarter of the wavelength corresponding to the frequency in the frequency band of the total signal; An absorption load is electrically connected to the second transmission line and is used to consume the signal transmitted from the second transmission line to the absorption load.

2. The equalizer according to claim 1, characterized in that The first transmission line includes a first coupling segment, the second transmission line includes a second coupling segment, the first coupling segment and the second coupling segment are spaced apart in the second direction, the electrical length of the first coupling segment is equal to the electrical length of the second coupling segment, and the plurality of open branches are electrically connected to the second coupling segment.

3. The equalizer according to claim 2, characterized in that The electrical length of the second coupling section is an odd multiple of one quarter of the wavelength corresponding to the frequency in the frequency band of the total signal.

4. The equalizer according to claim 2, characterized in that The electrical length of the first transmission line is greater than the electrical length of the first coupling section, and the electrical length of the second transmission line is equal to the electrical length of the second coupling section.

5. The equalizer according to claim 1, characterized in that The electrical lengths of different open-circuit branches are different, so that different open-circuit branches correspond to different frequencies.

6. The equalizer according to claim 5, characterized in that The frequency band of the total signal includes a first frequency and a second frequency, the open branches include a first open branch and a second open branch, the first open branch is adjacent to the second open branch, the electrical length of the first open branch is an odd multiple of one quarter of the wavelength corresponding to the first frequency, and the electrical length of the second open branch is an odd multiple of one quarter of the wavelength corresponding to the second frequency; The electrical length of the interval between the first open branch and the second open branch is an odd multiple of one quarter of the wavelength corresponding to the center frequencies of the first frequency and the second frequency.

7. The equalizer according to claim 5, characterized in that The electrical length of the open-circuit branch is one quarter of the wavelength corresponding to the frequency in the frequency band of the total signal.

8. The equalizer according to claim 1, characterized in that The absorbing load is disposed at both ends of the second transmission line.

9. The equalizer according to claim 1, characterized in that: The equalizer further includes a circuit board, the first transmission line, the second transmission line and the plurality of open-circuit branches are all printed on the circuit board, and the absorption load is electrically connected to the circuit board.

10. An ultra-wideband system, characterized in that: It comprises a signal source and the equalizer according to any one of claims 1 to 9, wherein the signal source is used to input a total signal to a first transmission line of the equalizer.

11. A digital collector, characterized in that: The invention comprises an input buffer module, a variable gain amplifier, an A / D conversion module, a control processing module, an input module and the ultra-wideband system as claimed in claim 10, wherein the output end of the ultra-wideband system is connected to the input buffer module, the output end of the input buffer module is connected to the variable gain amplifier, the variable gain amplifier is connected to the A / D conversion module, the A / D conversion module is connected to the control processing module, and the input module is connected to the control processing module.

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