Filter, filter tuning method and related equipment

Abstract

A filter, a filter tuning method and related equipment, the filter comprises a waveguide port and a periodic structure, the periodic structure is communicated with the waveguide port, the periodic structure is centrosymmetric, the periodic structure comprises m metal cavities, the m metal cavities are communicated with each other, the m metal cavities are the same in size, and m is an integer greater than or equal to 2. The sizes and the periods of the m metal cavities are related to the tuning parameters of the filter, so that the tuning parameters of the filter can be determined by directly adjusting the sizes and the periods of the m metal cavities, the requirements can be quickly met, and the design efficiency of the filter is improved.

Description

Technical Field

[0001] 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

[0002] With the development of wireless communication and instrumentation electronics, filters, as key circuits, have become increasingly important.

[0003] The filter has a frequency selection function, which is mainly used to extract useful signals from the spectrum and filter out other useless or interfering signals. When designing a filter, simulation is required to tune it to determine its parameters such as cutoff frequency and bandwidth.

[0004] 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. Summary of the invention

[0005] The embodiment of the present application provides a filter for improving the design efficiency of the filter. The embodiment of the present application also provides a corresponding filter tuning method, electronic equipment, communication equipment, computing equipment, and computer-readable storage medium.

[0006] The first aspect of 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.

[0007] The waveguide port in the present application can be divided into an input waveguide and an output waveguide. The sizes of the input waveguide and the output waveguide can be designed according to international standard waveguide sizes or according to requirements.

[0008] The metal cavity in the present application can also be understood as a resonant cavity or a corrugated cavity, and m metal cavities form a periodic structure. In addition to the connecting channel between the two metal cavities, the rest can be understood as two resonant diaphragms, that is, the metal filling part between the two metal cavities and the connecting channel is the resonant diaphragm.

[0009] In the present application, the value of m in the m metal cavities, that is, the number of metal cavities, can be designed in combination with actual needs. The more 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 be greater. If the out-of-band suppression requirement is relatively high, the value of m can be increased, and if the insertion loss requirement is relatively high, the value of m can be reduced.

[0010] 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 hollowed-out structures in the metal layer of the filter.

[0011] 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 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, so the tuning parameters of the filter can be determined directly by adjusting the size and period of the m metal cavities, the needs can be quickly met, and the design efficiency of the filter is improved.

[0012] 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.

[0013] 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 to meet user needs and improve the feasibility of the solution.

[0014] In a possible implementation of the first aspect, the m metal cavities are interconnected through a connecting channel, and a period of the m metal cavities is the sum of a length of one metal cavity among the m metal cavities and a length of the connecting channel.

[0015] In this possible implementation, the structure of the filter also includes a connecting channel, the connecting channel 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.

[0016] 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.

[0017] 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.

[0018] In a possible implementation of the first aspect, 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 includes n transition cavities, and the sizes of the n transition cavities are gradually changed based on the sizes of the m metal cavities and the size of the waveguide port, and n is an integer greater than 0.

[0019] In this possible implementation, the transition structure serves as the transition part between the waveguide port and the periodic structure. A step-changing transition cavity can be used to gradually match the impedance and balance the miniaturization and performance of the filter. The design of the transition structure can increase the frequency of the high-order mode and achieve wide stopband performance.

[0020] 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.

[0021] 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.

[0022] In a possible implementation manner of the first aspect, the filter is machined based on a CNC milling process.

[0023] In this possible implementation, the filter can be processed by a CNC milling process, which facilitates the manufacture of the filter and reduces the cost.

[0024] In a possible implementation manner of the first aspect, an operating frequency of the filter is greater than or equal to 40 GHz.

[0025] In this possible implementation, the filter can be applied to various bands, thereby improving the applicability of the filter.

[0026] 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, 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.

[0027] A third aspect of the present application provides an electronic 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.

[0028] A fourth aspect of the present application provides a communication device, which includes a filter as in the above-mentioned first aspect or any possible implementation of the first aspect, and a radio frequency element coupled to the filter.

[0029] In a fifth aspect, the present application provides a computing device, the 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 executes the method as described in the second aspect above. Optionally, the computing device may also include an input / output (I / O) interface, and the computer-readable storage medium storing the computer program may be a memory.

[0030] 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.

[0031] The seventh aspect of 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.

[0032] In an eighth aspect of the present application, a chip system is provided, the chip system comprising at least one processor and an interface, the interface being used to receive data and / or signals, and at least one processor being used to support a computer device to implement the functions involved in the second aspect above. In one possible design, the chip system may also include a memory, the memory being 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.

[0033] 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, 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 determined directly by adjusting the size and period of the m metal cavities, the needs can be quickly met, and the design efficiency of the filter is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of the structure of a wireless receiver;

[0035] Figure 2 A schematic diagram of an embodiment of a filter provided in an embodiment of the present application;

[0036] Figure 3 A schematic diagram of an embodiment of a metal cavity provided in an embodiment of the present application;

[0037] Figure 4 A schematic diagram of another embodiment of the filter provided in the embodiment of the present application;

[0038] Figure 5A A schematic diagram of a top view of a filter provided in an embodiment of the present application;

[0039] Figure 5B A schematic diagram of a front view of a filter provided in an embodiment of the present application;

[0040] Figure 6 A schematic diagram of an embodiment of a filter tuning method provided in an embodiment of the present application;

[0041] Figure 7 A schematic diagram of a frequency response curve of a filter provided in an embodiment of the present application;

[0042] Figure 8 , Fig.9A and Fig. 9B A schematic diagram of a filter dispersion curve provided in an embodiment of the present application;

[0043] Fig.10 Another schematic diagram of a frequency response curve of a filter provided in an embodiment of the present application;

[0044] Fig.11 A schematic diagram of an embodiment of a computing device provided for an embodiment of the present application. DETAILED DESCRIPTION

[0045] The following describes the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the described embodiments are only embodiments of a part of the present application, rather than all embodiments. It is known to those skilled in the art 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.

[0046] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be 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" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0047] 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.

[0048] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0049] The following is an example of the application scenario involved in the embodiments of the present application.

[0050] With the development of wireless communication and instrumentation electronics, filters, as key circuits, have become increasingly important.

[0051] The filter has a frequency selection function, which can effectively filter out the frequency point of a specific frequency in the power line or the frequency outside the frequency point, and obtain an electrical signal of a specific frequency, or eliminate the electrical signal after a specific frequency. The filter is one of the key circuits in a wireless receiver. For the RF system, the filter is mainly used to extract the useful signal in the spectrum and filter out other useless or interfering signals.

[0052] like Figure 1 As shown, in the wireless receiver, the radio frequency signal received by the antenna is filtered by the filter and then output. The wireless receiver may also include functional devices such as an amplifier, a power divider, a mixer, and a logic gate circuit ( Figure 1 not shown).

[0053] Filters are divided into five types according to the frequency band of the signal passed: low-pass, high-pass, band-pass, band-stop and all-pass filters. Figure 1 The filter shown in the figure is a band pass filter (BPF). A band pass filter is a filter that can pass frequency components within a certain frequency range but attenuate frequency components in other ranges to an extremely low level. It allows signals in a certain frequency band to pass through and suppresses signals, interference, and noise below or above the frequency band.

[0054] The main parameters of the filter include center frequency, cutoff frequency, passband bandwidth (also referred to as bandwidth), insertion loss and return loss. Among them, the center frequency refers to the frequency f0 of the filter passband, generally f0 = (f1 + f2) / 2, f1 and f2 are the left and right side frequency points 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 the passband bandwidth is f2-f1. Insertion loss is the attenuation of the original signal in the circuit due to the introduction of the filter, and is characterized by the loss at the center or cutoff frequency. Return loss is the ratio of the input power of the port signal to the reflected power.

[0055] When designing a filter, simulation is required to tune it in order to determine its parameters such as cutoff frequency and bandwidth. However, the current simulation process is very difficult, and the staff needs to continuously tune it 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.

[0056] Based on this, the embodiment of the present application provides a filter for improving the design efficiency of the filter. The embodiment of the present application also provides a corresponding filter tuning method, electronic device, communication device, computing device and computer readable storage medium, etc. The following are detailed descriptions.

[0057] When preparing filters, different advanced micromachining technologies, such as computer numerical control (CNC) milling, SU-8 photoresist and silicon deep reactive ion etching (DRIE), can be used to process waveguide devices to obtain filters. The processes of SU-8 photoresist and DRIE are relatively complex and the manufacturing cost is also high. CNC milling is another good candidate for the manufacture of terahertz waveguide devices with relatively low cost. The most advanced level allows a processing tolerance of about ±1um.

[0058] In the embodiment of the present application, the dispersion curve of the filter can be referred to when preparing the filter. The horizontal axis of the dispersion curve is the normalized electromagnetic wave propagation constant, and the vertical axis is the electromagnetic wave frequency. The dispersion curve can indicate parameters such as the center frequency and cutoff frequency of the filter. Therefore, the filter can be simulated and tuned based on the dispersion curve, so as to quickly design a filter that meets the requirements.

[0059] The filter in the embodiment of the present application is a bandpass filter, or a waveguide cavity module of a single filter, that is, a part of a complete filter, or a part of an instrument, and is applied in various electronic devices (instrument equipment) or communication equipment (wireless communication system). Its specific product form can be an image frequency suppression filter, a spurious suppression filter, and the electronic device or communication equipment can also include a matching mixer, a frequency multiplier, and an amplifier.

[0060] The filter and filter tuning method provided in the embodiments of the present application are described below in conjunction with the above application scenarios.

[0061] like Figure 2 As shown, an embodiment of the present application provides a filter, and one embodiment of the filter includes a waveguide port and a periodic structure.

[0062] 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 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, and m is an integer greater than 0.

[0063] Specifically, Figure 3 As shown, 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 ( Figure 2 The thickness is not shown in the figure). 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 the resonant diaphragm. The waveguide port can be divided into an input waveguide (located at Figure 2 on the left) and the output waveguide (located at Figure 2 on the right side of the image).

[0064] The dimensions of the input waveguide and the output waveguide can be designed according to the international standard waveguide dimensions or according to one's own needs. For example, the dimension of the international standard WR10 is 2.54mm*1.27mm. The dimension design of the m metal cavities, that is, the dimensions a, b, l, and period p of the m metal cavities, can obtain the tuning parameters of the filter according to its dispersion curve, such as bandwidth, upper cutoff frequency, lower cutoff frequency and center frequency. Finally, combined with the design requirements, the dimensions of the final m metal cavities can be determined.

[0065] The value of m in the m metal cavities, that is, the number of metal cavities, can be designed according to actual needs. The more 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 be greater. If the out-of-band suppression requirement is relatively high, the value of m can be increased, and if the insertion loss requirement is relatively high, the value of m can be reduced.

[0066] The filter can be prepared by CNC milling, which is easy to process. The CNC milling process can accurately control the dimensions a, b, l, and period p of the m metal cavities, thereby facilitating the manufacture of the filter and reducing costs.

[0067] 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 embodiments of the present application do not limit the operating frequency of the filter.

[0068] Optional, such as Figure 4 As shown, the filter also includes two transition structures, thereby balancing the miniaturization and performance of the filter. The transition structure is a transition part between the waveguide port and the periodic structure, and a step-changing transition cavity can be used to gradually match the impedance.

[0069] The two sides of the periodic structure are connected to the waveguide port through 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 changed based on the sizes of the m metal cavities and the size of the waveguide port, and n is an integer greater than 0.

[0070] It should be understood that Figure 4 The structure shown is a schematic diagram of the hollowed-out part of the filter. Figure 4 The structures shown in the figure 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.

[0071] 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 in combination with actual needs. The role of the transition structure is impedance matching, gradually matching from the standard waveguide port to the periodic structure. The more orders (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 considered comprehensively during design. The more transition cavities there are, 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.

[0072] For example, Figure 5A and Figure 5B As shown, the widths of n (n = 4 in this example) transition cavities are smaller than the widths of m (m = 3 in this example) metal cavities and larger than the width of the waveguide port, and the thicknesses of the n transition cavities are larger than the thicknesses of the m metal cavities and smaller than the thickness of the waveguide port.

[0073] Specifically, the filter is overall centrosymmetric, and the two transition structures have exactly the same dimensional structure. The central axes of all the resonant cavities, resonant diaphragms, and waveguide ports are located on the same straight line and are centrosymmetric. Each transition structure is composed of 4 step-transformed transition cavities and resonant diaphragms. The periodic structure is composed of 3 repeated metal cavities.

[0074] In this filter, the thickness of the resonant cavities (including metal cavities and transition cavities), which can also be understood as the waveguide wall length of the filter, gradually decreases from a0 to a5 and then gradually increases back to a0, that is, a0 > a1 (a 11 ) > a2 (a 10 ) > a3 (a9) > a4 (a8) > a5 = a6 = a7. And the width of the resonant cavity, which can also be understood as the width of the waveguide wall of the filter, gradually increases from b0 to b5 and then gradually decreases 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.

[0075] As Figure 6 shown, the embodiment of the present application also provides a filter tuning method, which includes:

[0076] 601. Obtain the initial parameters of the dimensions and periods of m metal cavities.

[0077] 602. Obtain the dispersion curve of the filter based on the initial parameters.

[0078] 603. Adjust the initial parameters based on the dispersion curve until the tuning parameter shown by the dispersion curve is a preset value.

[0079] The filter tuning method provided by the embodiment of the present application will be described in detail below in combination with an example of a filter.

[0080] The embodiment of the present application needs to design a filter as Figure 4-5B shown based on the dispersion curve. This filter is specifically a waveguide band-pass filter, and its operating frequency range is 85 GHz - 98 GHz. The specific structure of this filter can refer to the filter shown in Figure 4-5B , and the embodiment of the present application will not elaborate here.

[0081] For example, please refer to Figure 5A and Figure 5B The dimensions of the transition structure of the filter are: a1=2.085mm, a2=2.073mm, a3=1.831mm, a4=1.792mm, b1=1.407mm, b2=1.852mm, b3=2.179mm, b4=2.248mm.

[0082] like Figure 7 As shown, based on 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 the filter, the return loss is less than -20dB and the insertion loss is also small.

[0083] Then, the initial parameters of the periodic structure, ie, the size and period of m (m=3 in this example) metal cavities, are obtained. The initial parameters are: a5=1.761 mm, b5=2.294 mm, l=0.983 mm, and p=1.249 mm.

[0084] like Figure 8 As shown, based on the above initial parameters, the dispersion curve of the filter at 3dB is obtained for simulation, and the initial parameters are adjusted based on the dispersion curve until the tuning parameters displayed by the dispersion curve are preset values. Figure 8 In , β2p / π represents the propagation constant along the propagation direction, and the dispersion curve is used to show the tuning parameters of the filter. When the thickness a5 of the metal cavity is adjusted (a5=a6=a7), the dispersion curve shows that both the upper cutoff frequency and the lower cutoff frequency band of the filter change simultaneously.

[0085] 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 the upper cutoff frequency can be independently controlled by adjusting the parameter b5.

[0086] like Fig.9A and Fig. 9B As shown in Figure 1, as the values ​​of parameters l and p increase, the upper cutoff frequency of the periodic structure decreases accordingly. At the same time, the lower cutoff frequency remains unchanged.

[0087] Optionally, considering processing defects, chamfering is required when designing the metal cavity, and the fillet radius is set to 200 μm.

[0088] Exemplarily, in another example, 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, p=1.249 mm.

[0089] like Fig.10 As shown, the return loss and insertion loss shown by the S11 curve and S21 curve of the filter are still low.

[0090] In view of the difficulty in tuning the waveguide bandpass filter, the embodiment of the present application utilizes the dispersion characteristics of the periodic structure to design a waveguide bandpass filter that can flexibly adjust the upper cutoff frequency, the lower cutoff frequency and the bandwidth. Compared with the traditional direct-coupled filter, the waveguide bandpass filter has a wide stopband characteristic. In addition, the waveguide bandpass filter can also be processed by CNC technology and has the characteristics of easy processing.

[0091] 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:

[0092] (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.

[0093] (2) The filter can be processed by CNC milling technology, which facilitates the manufacture of the filter and reduces costs.

[0094] (3) The design of the transition structure can increase the frequency of high-order modes and achieve wide stopband performance.

[0095] 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.

[0096] like Fig.11As shown, a possible logical structure diagram of a computing device 1100 provided in an embodiment of the present application. The computing device 1100 may 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 the 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 Figure 6 Steps 601 to 603 in the embodiment and / or other processes of the technology described herein are specifically used to implement filter simulation and design. The communication interface 1102 is used to support the computing device 1100 to communicate. The memory 1103 is used to store program codes and data of the computing device 1100.

[0097] Among them, the processor 1101 can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component or any combination thereof. It can implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the contents disclosed in this application. The processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on. The bus 1104 can be a peripheral component interconnect standard (Peripheral Component Interconnect, PCI) bus or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.11 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0098] 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.

[0099] 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.

[0100] In another embodiment of the present application, a chip system is also provided, the chip system includes at least one processor and an interface, the interface is used to receive data and / or signals, and at least one processor is used to support the filter tuning method described in the above embodiment. In a possible design, the chip system may also include a memory, the memory 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.

[0101] In another embodiment of the present application, an electronic device is provided, which includes the filter described in the above embodiment and a radio frequency element coupled to the filter. The electronic device may be an electronic instrument device, such as a device including an image suppression filter, a spurious suppression filter, a mixer, a frequency multiplier or an amplifier.

[0102] In another embodiment of the present application, a communication device is further provided, the electronic device comprising the filter described in the above embodiment, and a radio frequency element coupled to the filter. The communication device may specifically be a wireless receiver or other communication electronic device. The structural diagram thereof may refer to Figure 1 , the embodiments of this application will not be described in detail.

[0103] Those of ordinary skill 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 the present application.

[0104] Those skilled in the art can 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.

[0105] In the several embodiments provided in the present 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 only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, 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.

[0106] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0107] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0108] 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 to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), disk or optical disk and other media that can store program code.

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 symmetrical; 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 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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