Filter, filter tuning method, and related device

Abstract

A filter, a filter tuning method, and a related device. The filter comprises a waveguide port and a periodic structure; the periodic structure is communicated with the waveguide port, and the periodic structure is centrosymmetric; and the periodic structure comprises m metal cavities, the m metal cavities are communicated with each other, the sizes of the m metal cavities are the same, and the sizes and periods of the m metal cavities are related to tuning parameters of the filter. Therefore, the tuning parameters of the filter can be directly determined by adjusting the sizes and periods of the m metal cavities, thereby quickly satisfying requirements, and improving the design efficiency of the filter.

Description

A filter, filter tuning method and related equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on October 17, 2023, with application number 202311350509.4 and application name “A filter, a filter tuning method and related equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of electronic circuit technology, and specifically to a filter, a filter tuning method, and related equipment. Background Art

[0003] With the development of wireless communication and instrumentation electronics, filters, as key circuits, have become increasingly important.

[0004] Filters have frequency-selective functions, primarily used to extract useful signals from a spectrum while filtering out unwanted or interfering signals. When designing a filter, simulations are required to tune it and determine parameters such as its cutoff frequency and bandwidth.

[0005] However, the current simulation process is very difficult, and staff need to continuously tune based on their experience to meet the requirements of parameters such as cutoff frequency and bandwidth. When the requirements are constantly changing, the design efficiency of the filter is particularly low.

[0006] Summary of the Invention

[0007] The present invention provides a filter for improving filter design efficiency, and also provides a corresponding filter tuning method, electronic equipment, communication equipment, computing equipment, and computer-readable storage medium.

[0008] In a first aspect, the present application provides a filter, which includes a waveguide port and a periodic structure; the periodic structure is connected to the waveguide port, and the periodic structure is centrally symmetric; the periodic structure includes m metal cavities, the m metal cavities are interconnected, the m metal cavities have the same size, the size and period of the m metal cavities are related to the tuning parameters of the filter, and m is an integer greater than 0.

[0009] The waveguide ports in this application can be divided into input waveguides and output waveguides. The sizes of the input waveguides and output waveguides can be designed according to international standard waveguide sizes or as required.

[0010] The metal cavities in this application can also be understood as resonant cavities or corrugated cavities, with m metal cavities forming a periodic structure. The metal cavity between the two metal cavities, excluding the connecting channel, can be understood as two resonant diaphragms. That is, the metal-filled portion between the two metal cavities and the connecting channel is the resonant diaphragm.

[0011] In this application, the value of m in the m metal cavities, i.e., the number of metal cavities, can be designed based on actual requirements. The greater the number of metal cavities in the periodic structure, the better the out-of-band suppression, i.e., the better the filter's ability to suppress clutter, but also the greater the insertion loss. If the out-of-band suppression requirement is high, the value of m can be increased; if the insertion loss requirement is high, the value of m can be decreased.

[0012] In the present application, the filter is centrally symmetrical as a whole and is made of metal. The periodic structure and waveguide port structures can be understood as structures hollowed out in the metal layer of the filter.

[0013] In the first aspect, the filter includes a waveguide port and a periodic structure, the periodic structure is connected to the waveguide port, the periodic structure is centrally symmetrical, the periodic structure includes m metal cavities, the m metal cavities are connected to each other, the m metal cavities have the same size, the size and period of the m metal cavities are related to the tuning parameters of the filter, so the tuning parameters of the filter can be directly determined by adjusting the size and period of the m metal cavities, which quickly meets the needs and improves the design efficiency of the filter.

[0014] In a possible implementation manner of the first aspect, the dimensions of the m metal cavities include the length, width, and thickness of the m metal cavities.

[0015] In this possible implementation, the dimensions of the m metal cavities are specifically their length, width, and thickness. Since the dimensions of the m metal cavities are related to the tuning parameters of the filter, the tuning parameters of the filter can be adjusted accordingly by adjusting the length, width, and thickness of the m metal cavities, thereby meeting user needs and improving the feasibility of the solution.

[0016] In a possible implementation of the first aspect, the m metal cavities are interconnected via a connecting channel, and a period of the m metal cavities is the sum of the length of one metal cavity among the m metal cavities and the length of the connecting channel.

[0017] In this possible implementation, the structure of the filter further includes a connecting channel, which is also a cavity structure, and the period of the metal cavity is the sum of the length of the metal cavity and the length of the connecting channel.

[0018] In a possible implementation manner of the first aspect, the tuning parameters of the filter include an upper cutoff frequency, a lower cutoff frequency, a center frequency, and a bandwidth of the filter.

[0019] In this possible implementation, by adjusting the size of the metal cavity, the upper cutoff frequency, lower cutoff frequency, center frequency and bandwidth of the filter can be adjusted accordingly, thereby improving the feasibility of the solution.

[0020] In a possible implementation of the first aspect, two transition structures are further included; the two sides of the periodic structure are connected to the waveguide port through the two transition structures respectively, and the two transition structures are mirror-symmetrical based on the center point of the periodic structure; one of the two transition structures includes n transition cavities, and the sizes of the n transition cavities are gradually varied based on the sizes of the m metal cavities and the size of the waveguide port, and n is an integer greater than 0.

[0021] In this possible implementation, the transition structure serves as the transition part between the waveguide port and the periodic structure. A step-by-step transition cavity can be used to gradually match the impedance, balancing the miniaturization and performance of the filter. The design of the transition structure can increase the frequency of high-order modes and achieve wide stopband performance.

[0022] In a possible implementation of the first aspect, a width of the n transition cavities is smaller than a width of the m metal cavities and larger than a width of the waveguide port; a thickness of the n transition cavities is larger than a thickness of the m metal cavities and smaller than a thickness of the waveguide port.

[0023] In this possible implementation, in the size of the filter, the width of the resonant cavity gradually increases and then gradually decreases and recovers, and the thickness of the resonant cavity gradually decreases and then gradually increases and recovers, which improves the feasibility of the solution.

[0024] In a possible implementation manner of the first aspect, the filter is machined based on a CNC milling process.

[0025] In this possible implementation, the filter can be processed using a CNC milling process, which facilitates filter manufacturing and reduces costs.

[0026] In a possible implementation manner of the first aspect, an operating frequency of the filter is greater than or equal to 40 GHz.

[0027] In this possible implementation, the filter can be applied to various bands, thereby improving the applicability of the filter.

[0028] The second aspect of the present application provides a filter tuning method, which is applied to a filter as in the first aspect or any possible implementation of the first aspect above, and the method includes: obtaining initial parameters of the size and period of m metal cavities; obtaining a dispersion curve of the filter based on the initial parameters, the dispersion curve being used to display the tuning parameters of the filter; adjusting the initial parameters based on the dispersion curve until the tuning parameters displayed by the dispersion curve are preset values.

[0029] A third aspect of the present application provides an electronic device, which includes the filter according to the first aspect or any possible implementation of the first aspect, and a radio frequency element coupled to the filter.

[0030] A fourth aspect of the present application provides a communication device, which includes a filter as described in the first aspect or any possible implementation of the first aspect, and a radio frequency element coupled to the filter.

[0031] In a fifth aspect, the present application provides a computing device comprising a processor, a memory, and a computer-readable storage medium storing a computer program; the processor is coupled to the computer-readable storage medium, and a computer-executable instruction running on the processor, when the computer-executable instruction is executed by the processor, the processor performs the method of the second aspect described above. Optionally, the computing device may further include an input / output (I / O) interface, and the computer-readable storage medium storing the computer program may be a memory.

[0032] In a sixth aspect, the present application provides a computer-readable storage medium storing one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the method of the second aspect described above.

[0033] In a seventh aspect, the present application provides a computer program product storing one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the method of the second aspect described above.

[0034] In an eighth aspect of the present application, a chip system is provided, which includes at least one processor and an interface, the interface being used to receive data and / or signals, and the at least one processor being used to support a computer device in implementing the functions involved in the second aspect above. In one possible design, the chip system may also include a memory, which is used to store program instructions and data necessary for the computer device. The chip system may be composed of a chip or may include a chip and other discrete devices.

[0035] In the present application, the filter includes a waveguide port and a periodic structure, the periodic structure is connected to the waveguide port, the periodic structure is centrally symmetrical, the periodic structure includes m metal cavities, the m metal cavities are interconnected, the m metal cavities have the same size, and the size and period of the m metal cavities are related to the tuning parameters of the filter. Therefore, the tuning parameters of the filter can be directly determined by adjusting the size and period of the m metal cavities, which quickly meets the needs and improves the design efficiency of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG1 is a schematic structural diagram of a wireless receiver;

[0037] FIG2 is a schematic diagram of an embodiment of a filter provided in an embodiment of the present application;

[0038] FIG3 is a schematic diagram of an embodiment of a metal cavity provided in an embodiment of the present application;

[0039] FIG4 is a schematic diagram of another embodiment of a filter provided in an embodiment of the present application;

[0040] FIG5A is a schematic diagram of a top view of a filter provided in an embodiment of the present application;

[0041] FIG5B is a schematic diagram of a front view of a filter provided in an embodiment of the present application;

[0042] FIG6 is a schematic diagram of an embodiment of a filter tuning method provided in an embodiment of the present application;

[0043] FIG7 is a schematic diagram of a frequency response curve of a filter provided in an embodiment of the present application;

[0044] FIG8 , FIG9A and FIG9B are schematic diagrams of filter dispersion curves provided in an embodiment of the present application;

[0045] FIG10 is another schematic diagram of a frequency response curve of a filter provided in an embodiment of the present application;

[0046] FIG11 is a schematic diagram of an embodiment of a computing device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] The following describes the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present application, rather than all the embodiments. Those skilled in the art will appreciate that with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0048] The terms "first," "second," and the like in the specification and claims of this application and in the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatus.

[0049] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0050] In addition, numerous specific details are provided in the detailed description below to better illustrate the present application. Those skilled in the art will appreciate that the present application can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present application.

[0051] The following examples illustrate the application scenarios involved in the embodiments of the present application.

[0052] With the development of wireless communication and instrumentation electronics, filters, as key circuits, have become increasingly important.

[0053] Filters have a frequency-selective function, effectively filtering out frequencies near or beyond a specific frequency in the power line, thereby obtaining an electrical signal at a specific frequency or eliminating the signal after a specific frequency. Filters are a key circuit in wireless receivers. In radio frequency systems, filters primarily extract useful signals from the spectrum while filtering out unwanted or interfering signals.

[0054] As shown in FIG1 , in a wireless receiver, the radio frequency signal received by the antenna is filtered by a filter and then output. The wireless receiver may also include functional components such as an amplifier, a power divider, a mixer, and a logic gate circuit (not shown in FIG1 ).

[0055] Filters are categorized by the frequency band of the signals they pass: low-pass, high-pass, band-pass, band-stop, and all-pass. For example, the filter shown in Figure 1 is a band-pass filter (BPF). A band-pass filter is one that passes frequency components within a certain frequency range while attenuating frequency components in other ranges to extremely low levels. It allows signals within a certain frequency band to pass while suppressing signals, interference, and noise below and above that frequency band.

[0056] The main parameters of a filter include center frequency, cutoff frequency, passband bandwidth (also referred to as bandwidth), insertion loss, and return loss. The center frequency refers to the filter's passband frequency f0, typically set to (f1 + f2) / 2. f1 and f2 are the left and right side frequencies of the bandpass filter, with a relative drop of 1 decibel (dB) or 3dB. The cutoff frequency can be divided into an upper cutoff frequency f2 and a lower cutoff frequency f1. The passband bandwidth refers to the width of the spectrum that needs to be passed, and is calculated as f2 - f1. Insertion loss is the attenuation of the original signal in the circuit caused by the introduction of the filter, and is characterized by loss at the center or cutoff frequency. Return loss is the ratio of the input signal power at the port to the reflected power.

[0057] When designing a filter, simulations are required to tune it and determine parameters such as cutoff frequency and bandwidth. However, the current simulation process is very difficult, requiring continuous tuning based on experience to meet the requirements for parameters such as cutoff frequency and bandwidth. When requirements are constantly changing, filter design efficiency is particularly low.

[0058] Based on this, embodiments of the present application provide a filter for improving filter design efficiency. Embodiments of the present application also provide corresponding filter tuning methods, electronic devices, communication devices, computing devices, and computer-readable storage media. These are described in detail below.

[0059] When fabricating filters, various advanced micromachining techniques, such as computer numerical control (CNC) milling, SU-8 photoresist, and silicon deep reactive ion etching (DRIE), can be used to fabricate waveguide components and create filters. Both SU-8 photoresist and DRIE processes are relatively complex and expensive. CNC milling, on the other hand, is another promising candidate for relatively low-cost terahertz waveguide device fabrication, with state-of-the-art techniques allowing machining tolerances of approximately ±1 μm.

[0060] In the embodiments of this application, a dispersion curve can be used as a reference when preparing a filter. The abscissa of the dispersion curve represents the normalized electromagnetic wave propagation constant, and the ordinate represents the electromagnetic wave frequency. The dispersion curve can indicate parameters such as the filter's center frequency and cutoff frequency. Therefore, the filter can be simulated and tuned based on the dispersion curve, allowing for rapid design of a filter that meets specific requirements.

[0061] The filters in the embodiments of this application are bandpass filters, but they can also be waveguide cavity modules of a single filter, i.e., a portion of a complete filter, or components of instrumentation, and are used in various electronic devices (instrumentation equipment) or communication equipment (wireless communication systems). Specific product forms can include image rejection filters and spurious rejection filters. Electronic devices or communication equipment may also include matched mixers, frequency multipliers, and amplifiers.

[0062] The filter and filter tuning method provided in the embodiments of the present application are described below in conjunction with the above application scenarios.

[0063] As shown in FIG2 , an embodiment of the present application provides a filter, and one embodiment of the filter includes a waveguide port and a periodic structure.

[0064] The periodic structure 100 is connected to the waveguide port 200 and is centrally symmetric. The periodic structure includes m metal cavities, which are interconnected and have the same size. The size and period of the m metal cavities are related to the tuning parameters of the filter, and m is an integer greater than 0.

[0065] Specifically, as shown in Figure 3, the dimensions of the m metal cavities include the length (l), width (b) and thickness (a) of the m metal cavities. The m metal cavities are interconnected through connecting channels. The period (p) of the m metal cavities is the sum of the length of one metal cavity among the m metal cavities and the length of the connecting channel (the thickness is not shown in Figure 2). The metal cavity can also be understood as a resonant cavity or a corrugated cavity. The m metal cavities form a corrugated cavity array, that is, a periodic structure. In addition to the connecting channel, the rest of the two metal cavities can be understood as two resonant diaphragms, that is, the metal filling part between the two metal cavities and the connecting channel is a resonant diaphragm. The waveguide port can be divided into an input waveguide (located on the left side of Figure 2) and an output waveguide (located on the right side of Figure 2).

[0066] The dimensions of the input and output waveguides can be designed according to international standard waveguide dimensions or to meet specific requirements. For example, the dimensions of the international standard WR10 are 2.54mm*1.27mm. The dimensions of the m metal cavities, i.e., the dimensions a, b, l, and period p of the m metal cavities, can be designed. The tuning parameters of the filter, such as bandwidth, upper cutoff frequency, lower cutoff frequency, and center frequency, can be obtained based on their dispersion curves. Finally, the dimensions of the m metal cavities can be determined based on the design requirements.

[0067] The value of m in the m metal cavities, that is, the number of metal cavities, can be designed based on actual requirements. The greater the number of metal cavities in the periodic structure, the better the out-of-band suppression, that is, the better the filter suppresses clutter, but at the same time, the insertion loss will also increase. If the out-of-band suppression requirement is higher, the value of m can be increased; if the insertion loss requirement is higher, the value of m can be reduced.

[0068] The filter can be manufactured using CNC milling, a process that is easy to process. Using CNC milling, the dimensions a, b, and l of the m metal cavities, as well as their period p, can be precisely controlled, facilitating filter manufacturing and reducing costs.

[0069] It should be noted that the operating frequency of the filter is greater than or equal to 40 gigahertz (GHz), and more specifically can be 85 GHz to 220 GHz, but the embodiment of the present application does not limit the operating frequency of the filter.

[0070] Optionally, as shown in Figure 4, the filter further includes two transition structures to balance the miniaturization and performance of the filter. The transition structure serves as the transition portion between the waveguide port and the periodic structure, and a step-wise transition cavity can be used to gradually match the impedance.

[0071] The two sides of the periodic structure are connected to the waveguide port through two transition structures, respectively. The two transition structures are mirror-symmetrical about the center point of the periodic structure. One of the two transition structures includes n transition cavities, and the sizes of the n transition cavities are gradually varied based on the sizes of the m metal cavities and the size of the waveguide port, where n is an integer greater than 0.

[0072] It should be understood that the structure shown in Figure 4 is a schematic diagram of the structure of the hollowed-out part of the filter. In fact, the structures shown in Figure 4 are all cavities, that is, the cavity part of the filter, and the outside of the cavity is surrounded or covered by the metal layer of the filter.

[0073] Specifically, the transition cavity can also be understood as a resonant cavity. The value of n in the n transition cavities, that is, the number of transition cavities, can be designed based on actual requirements. The function of the transition structure is impedance matching, gradually matching from a standard waveguide port to a periodic structure. The greater the order (that is, the number of transition cavities), the better the impedance matching and the lower the value of the filter return loss (S11) curve. However, the circuit length must be comprehensively considered during design. The greater the number of transition cavities, the longer the circuit length, and the greater the insertion loss. If the impedance matching requirement is relatively high, the value of n can be increased; if the insertion loss requirement is relatively high, the value of n can be reduced.

[0074] Exemplarily, as shown in FIG5A and FIG5B, the width of n (n=4 in this example) transition cavities is smaller than the width of m (m=3 in this example) metal cavities and is larger than the width of the waveguide port, and the thickness of the n transition cavities is larger than the thickness of the m metal cavities and is smaller than the thickness of the waveguide port.

[0075] Specifically, the filter is centrosymmetric, with the two transition structures having identical dimensions. The central axes of all resonant cavities, resonant diaphragms, and waveguide ports lie on the same straight line, demonstrating centrosymmetry. Each transition structure consists of four step-by-step transition cavities and resonant diaphragms. The periodic structure is composed of three repeating metal cavities.

[0076] In this filter, the thickness of the resonant cavity (including the metal cavity and the transition cavity) can also be understood as the waveguide wall length of the filter gradually decreasing from a0 to a5, and then gradually increasing to a0, that is, a0>a1(a 11 )>a2(a 10)>a3(a9)>a4(a8)>a5 = a6 = a7. The width of the resonant cavity can also be understood as the width of the waveguide wall of the filter gradually increasing from b0 to b5, and then gradually decreasing back to b0, that is, b0 < b1(b 11 )<b2(b 10 )<b3(b9)<b4(b8)<b5 = b6 = b7. The length l and period p of each resonant cavity remain unchanged, and the length of the resonant diaphragm between each resonant cavity (from w1 to w 12 ) also remains unchanged.

[0077] As shown in FIG. 6, an embodiment of the present application also provides a filter tuning method, which includes:

[0078] 601. Obtain the initial parameters of the dimensions and periods of m metal cavities.

[0079] 602. Obtain the dispersion curve of the filter based on the initial parameters.

[0080] 603. Adjust the initial parameters based on the dispersion curve until the tuning parameter shown by the dispersion curve is a preset value.

[0081] The filter tuning method provided by the embodiment of the present application will be described in detail below with an example of a filter.

[0082] The embodiment of the present application needs to design a filter as shown in FIGS. 4 - 5B based on the dispersion curve. This filter is specifically a waveguide band - pass filter with a working frequency range of 85 GHz - 98 GHz. The specific structure of this filter can refer to the filter shown in FIGS. 4 - 5B, and the embodiment of the present application will not elaborate here.

[0083] Exemplarily, referring to FIGS. 5A and 5B together, the dimensions of the transition structure of this filter are: a1 = 2.085 mm, a2 = 2.073 mm, a3 = 1.831 mm, a4 = 1.792 mm, b1 = 1.407 mm, b2 = 1.852 mm, b3 = 2.179 mm, b4 = 2.248 mm.

[0084] As shown in FIG. 7, for the transition structure designed based on the above dimensions, it can be seen that in the S11 curve and the insertion loss (S21) curve of this filter, the return loss is less than - 20 dB and the insertion loss is also small.

[0085] Then obtain the periodic structure, that is, the initial parameters of the dimensions and periods of m (m = 3 in this example) metal cavities. The initial parameters are: a5 = 1.761 mm, b5 = 2.294 mm, l = 0.983 mm, p = 1.249 mm.

[0086] As shown in Figure 8, a 3dB dispersion curve of the filter was obtained based on the initial parameters and simulated. The initial parameters were then adjusted based on the dispersion curve until the tuning parameters displayed by the dispersion curve reached the preset values. In Figure 8, β2p / π represents the propagation constant along the propagation direction, and the dispersion curve is used to illustrate the tuning parameters of the filter. Adjusting the thickness a5 of the metal cavity (a5 = a6 = a7) shows that both the upper and lower cutoff frequencies of the filter change simultaneously.

[0087] Similarly, similar to the adjustable phenomenon of parameter a5, when the width b5 of the metal cavity (b5 = b6 = b7) increases, at the same frequency, the propagation constant β2p / π increases, the upper cutoff frequency decreases, and the lower cutoff frequency remains unchanged. This shows that by adjusting parameter b5, the upper cutoff frequency can be independently controlled.

[0088] As shown in Figures 9A and 9B, as the values ​​of parameters l and p increase, the upper cutoff frequency of the periodic structure decreases accordingly, while the lower cutoff frequency remains unchanged.

[0089] Optionally, considering processing defects, chamfering is required when designing the metal cavity, and the fillet radius is set to 200 μm.

[0090] For example, in another embodiment, the operating frequency range of the filter is 175 GHz-205 GHz, and the dimensions of the transition structure of the filter are: a1 = 2.085 mm, a2 = 2.073 mm, a3 = 1.831 mm, a4 = 1.792 mm, b1 = 1.407 mm, b2 = 1.852 mm, b3 = 2.179 mm, b4 = 2.248 mm. The dimensions of the periodic structure are: a5 = 1.761 mm, b5 = 2.294 mm, l = 0.983 mm, and p = 1.249 mm.

[0091] As shown in Figure 10, the return loss and insertion loss shown by the S11 curve and S21 curve of the filter are still low.

[0092] The present invention addresses the difficulty of tuning waveguide bandpass filters by utilizing the dispersion characteristics of periodic structures to design a waveguide bandpass filter with flexible adjustment of the upper and lower cutoff frequencies and bandwidth. Compared to traditional direct-coupled filters, this waveguide bandpass filter exhibits a wide stopband. Furthermore, this waveguide bandpass filter can be easily machined using CNC technology.

[0093] Summarizing the above embodiments, it can be seen that the filter provided in the embodiments of the present application can bring about the following three beneficial effects, including but not limited to:

[0094] (1) The tuning parameters of the filter can be determined directly by adjusting the size and period of the metal cavity, which can quickly meet the needs and improve the design efficiency of the filter.

[0095] (2) The filter can be processed by CNC milling technology, which facilitates the manufacture of the filter and reduces costs.

[0096] (3) The design of the transition structure can increase the frequency of high-order modes and achieve wide stopband performance.

[0097] The filter and filter tuning method provided in the embodiments of the present application are introduced above. The following describes the related devices provided in the embodiments of the present application in conjunction with the accompanying drawings.

[0098] As shown in Figure 11, a possible logical structure diagram of a computing device 1100 provided for an embodiment of the present application is shown. The computing device 1100 can specifically be a computer device. The computing device 1100 includes: a processor 1101, a communication interface 1102, a memory 1103 and a bus 1104. The processor 1101 may include a CPU, or a CPU and at least one of a GPU, an NPU and other types of processors. The processor 1101, the communication interface 1102 and the memory 1103 are interconnected via a bus 1104. In an embodiment of the present application, the processor 1101 is used to control and manage the actions of the computing device 1100. For example, the processor 1101 is used to execute steps 601 to 603 in Figure 6 and / or other processes for the technology described herein, specifically for implementing simulation and design of filters. The communication interface 1102 is used to support the computing device 1100 in communicating. The memory 1103 is used to store program code and data of the computing device 1100.

[0099] The processor 1101 may be a central processing unit (CPU), a general-purpose processor (GPOR), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device (PLD), a transistor logic device (TLD), a hardware component, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The bus 1104 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, for example. The bus may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, FIG. 11 shows only one thick line, but this does not imply that there is only one bus or only one type of bus.

[0100] In another embodiment of the present application, a computer-readable storage medium is provided, in which computer-executable instructions are stored. When at least one processor of a device executes the computer-executable instructions, the device executes the filter tuning method described in the above embodiment.

[0101] In another embodiment of the present application, a computer program product is also provided, which includes computer execution instructions, which are stored in a computer-readable storage medium; at least one processor of the device can read the computer execution instructions from the computer-readable storage medium, and at least one processor executes the computer execution instructions so that the device executes the filter tuning method described in the above embodiment.

[0102] In another embodiment of the present application, a chip system is provided, comprising at least one processor and an interface for receiving data and / or signals, and at least one processor for supporting the filter tuning method described in the above embodiment. In one possible design, the chip system may further include a memory for storing program instructions and data necessary for the computer device. The chip system may be composed of a chip or may include a chip and other discrete components.

[0103] In another embodiment of the present application, an electronic device is provided, comprising the filter described in the above embodiment and a radio frequency component coupled to the filter. The electronic device may specifically be an electronic instrument, such as a device including an image rejection filter, a spurious rejection filter, a mixer, a frequency multiplier, or an amplifier.

[0104] In another embodiment of the present application, a communication device is provided. The electronic device includes the filter described in the above embodiment and a radio frequency component coupled to the filter. The communication device may specifically be a wireless receiver or other communication electronic device. A schematic diagram of its structure can be seen in Figure 1, and this embodiment of the present application will not be further described.

[0105] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of this application.

[0106] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0107] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0108] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0109] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0110] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

Claims

1. A filter, characterized in that: including waveguide ports and periodic structures; The periodic structure is connected to the waveguide port, and the periodic structure is centrally symmetric; The periodic structure includes m metal cavities, the m metal cavities are interconnected, the m metal cavities have the same size, the size and period of the m metal cavities are related to the tuning parameters of the filter, and m is an integer greater than 0.

2. The filter according to claim 1, characterized in that The dimensions of the m metal cavities include the length, width and thickness of the m metal cavities.

3. The filter according to claim 2, characterized in that The m metal cavities are interconnected through a connecting channel, and a period of the m metal cavities is the sum of the length of one metal cavity among the m metal cavities and the length of the connecting channel.

4. The filter according to any one of claims 1 to 3, characterized in that: The tuning parameters of the filter include an upper cutoff frequency, a lower cutoff frequency, a center frequency and a bandwidth of the filter.

5. The filter according to any one of claims 1 to 4, characterized in that: Two transition structures are also included; Both sides of the periodic structure are connected to the waveguide port through the two transition structures respectively, and the two transition structures are mirror-symmetrical based on the center point of the periodic structure; One of the two transition structures comprises n transition cavities, the sizes of the n transition cavities are gradually varied based on the sizes of the m metal cavities and the size of the waveguide port, and n is an integer greater than 0.

6. The filter according to claim 5, characterized in that The width of the n transition cavities is smaller than the width of the m metal cavities and larger than the width of the waveguide port; The thickness of the n transition cavities is greater than the thickness of the m metal cavities and less than the thickness of the waveguide port.

7. The filter according to any one of claims 1 to 6, characterized in that: The filter is manufactured based on a CNC milling process.

8. The filter according to any one of claims 1 to 7, characterized in that: The operating frequency of the filter is greater than or equal to 40 GHz.

9. A filter tuning method, characterized in that: The method is applied to the filter according to any one of claims 1 to 8, and the method comprises: Obtaining initial parameters of the size and period of the m metal cavities; Acquire a dispersion curve of the filter based on the initial parameters, where the dispersion curve is used to display tuning parameters of the filter; The initial parameter is adjusted based on the dispersion curve until the tuning parameter shown by the dispersion curve is a preset value.

10. An electronic device, characterized in that: The invention comprises a filter according to any one of claims 1 to 8, and a radio frequency element coupled to the filter.

11. A communication device, comprising the filter according to any one of claims 1 to 8, and a radio frequency element coupled to the filter.

12. A computing device, characterized in that: The method comprises a processor having computer-executable instructions running thereon, and when the computer-executable instructions are executed by the processor, the processor performs the method as claimed in claim 9.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to claim 9 is implemented.

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