Method for adjusting structural parameters of microwave filter and electronic device

Abstract

The application provides a structure parameter adjustment method of a microwave filter and electronic equipment. The method comprises the following steps: determining the zero point frequency and pole point frequency of each multi-order resonator in a first single-port network of the microwave filter; obtaining the intermediate resonant frequency of each multi-order resonator according to the zero point frequency and pole point frequency of each multi-order resonator in the first single-port network; obtaining the intermediate coupling coefficient between adjacent two multi-order resonators in the multi-order resonators in the first single-port network according to the zero point frequency, pole point frequency and intermediate resonant frequency related to the adjacent two multi-order resonators; and adjusting the structure parameter of the first single-port network based on the plurality of intermediate resonant frequencies, at least one intermediate coupling coefficient and the standard performance parameter corresponding to the microwave filter.

Description

Technical Field

[0001] This invention relates to the field of electronic communication technology, and in particular to a method for adjusting the structural parameters of a microwave filter and an electronic device thereof. Background Technology

[0002] With the rapid development of modern wireless communication technology, microwave filters, as frequency-selective devices to alleviate spectrum congestion, are widely used in satellite communication, mobile communication, radar systems, navigation systems, electronic countermeasures, and wireless telemetry. With the integration of new materials and processes, various forms of microwave filters, including surface acoustic wave (SAW), microstrip / stripline, dielectric, cavity, coaxial, waveguide, low-temperature co-fired ceramics (LTCC), and high-temperature superconductors (HTS), are constantly being developed.

[0003] In the development of microwave filters, the integrated design of resonator-coupled microwave filters plays a relatively important role. However, as the order of resonators in resonator-coupled microwave filters increases, their integrated design and tuning methods face increasingly greater challenges.

[0004] Currently, the integrated design of resonator-coupled microwave filters is accomplished using commercial simulation software. However, existing integrated design methods rely excessively on the embedded optimization algorithms of commercial simulation software, which increases the difficulty of subsequent tuning of the microwave filter. Summary of the Invention

[0005] In view of this, the present invention provides a method and apparatus for adjusting the structural parameters of a microwave filter, in order to at least partially solve the above-mentioned technical problems.

[0006] This invention provides a method for adjusting the structural parameters of a microwave filter, comprising: determining the zero-frequency and pole-frequency of each of the multi-order resonators in a first single-port network of the microwave filter; obtaining the intermediate resonant frequency of each of the multi-order resonators based on their respective zero-frequency and pole-frequency; obtaining the intermediate coupling coefficient between two adjacent resonators in the first single-port network based on their respective zero-frequency, pole-frequency, and intermediate resonant frequency; and adjusting the structural parameters of the first single-port network based on multiple intermediate resonant frequencies, at least one intermediate coupling coefficient, and standard performance parameters corresponding to the microwave filter.

[0007] According to an embodiment of the present invention, the determination of the zero-frequency and pole-frequency of each of the multi-order resonators in the first single-port network of the microwave filter includes: determining the i-th order second intermediate expression based on the (i-1)-th order first intermediate expression when 1 < i ≤ I; determining the i-th order first intermediate expression based on the (i-1)-th order second intermediate expression, the i-th order second intermediate expression, the (i-1)-th order intermediate resonant frequency, and the intermediate coupling coefficient between the (i-1)-th order resonator and the i-th order resonator; determining the zero-frequency of the i-th order resonator in the first single-port network based on the i-th order second intermediate expression; and determining the pole-frequency of the i-th order resonator in the first single-port network based on the i-th order first intermediate expression; wherein I is an integer greater than 1.

[0008] According to an embodiment of the present invention, the determination of the zero-frequency and pole-frequency of each of the multi-order resonators in the first single-port network of the microwave filter includes: simulating the first single-port network of the microwave filter when i=1, to obtain the zero-frequency and pole-frequency of the first-order resonator in the first single-port network.

[0009] According to an embodiment of the present invention, the first single-port network further includes a feed input interface; wherein, the simulation of the first single-port network of the microwave filter to obtain the zero-frequency and pole-frequency of the first-order resonator includes: determining the initial interface distance and at least one initial resonator spacing distance of the first single-port network in the microwave filter, wherein the initial interface distance represents a virtual interface distance satisfying a first predetermined distance condition, the virtual interface distance represents the distance between the feed input interface and the first-order resonator of the microwave filter, the initial resonator spacing distance represents a virtual resonator spacing distance satisfying a second predetermined distance condition, and the virtual resonator spacing distance represents the distance between two adjacent resonators in the microwave filter; and

[0010] Given that the microwave resonators satisfy the initial interface distance and the initial resonator spacing distance, the first port network is simulated to obtain the zero frequency and pole frequency of the first-order resonator.

[0011] According to an embodiment of the present invention, determining the initial interface distance and at least one initial resonator spacing distance of the first single-port network in the microwave filter includes:

[0012] Based on the aforementioned standard performance parameters and the first mapping relationship set, the initial interface distance of the first single-port network is determined. The first mapping relationship set includes multiple first mapping relationships, which characterize the relationship between the virtual interface distance and the virtual quality factor of the second single-port network. The second single-port network includes the aforementioned power input interface and a first-order resonator.

[0013] Based on the aforementioned standard performance parameters and the second mapping relationship set, the aforementioned initial resonator spacing distances are determined. The aforementioned second mapping relationship set includes multiple second mapping relationships, which characterize the relationship between the aforementioned virtual resonator spacing distances and the virtual coupling coefficients. The aforementioned virtual coupling coefficients characterize the coupling coefficients between two adjacent resonators in the aforementioned microwave resonator.

[0014] According to an embodiment of the present invention, the intermediate coupling coefficient between two adjacent resonators in the multi-order resonator is obtained based on the zero frequency, pole frequency and intermediate resonant frequency associated with the two adjacent resonators, including: when 1≤i≤I, for the i-th resonator and the (i+1)-th resonator in the multi-order resonator, the intermediate coupling coefficient between the i-th resonator and the (i+1)-th resonator is obtained based on the zero frequency, pole frequency and intermediate resonant frequency of the i-th resonator.

[0015] According to an embodiment of the present invention, adjusting the structural parameters of the first single-port network based on a plurality of intermediate resonant frequencies, at least one intermediate coupling coefficient, and standard performance parameters corresponding to the microwave filter includes: determining a tuning direction based on a plurality of intermediate resonant frequencies, at least one intermediate coupling coefficient, and standard performance parameters corresponding to the microwave filter; and adjusting the structural parameters of the first single-port network according to the tuning direction.

[0016] According to an embodiment of the present invention, the standard performance parameters include the standard center frequency of the microwave filter and the standard coupling coefficient between two adjacent resonators in the microwave filter; wherein the structural parameters include the length of the resonator and the distance between two adjacent resonators; wherein adjusting the structural parameters of the first single-port network according to the tuning direction includes: for each resonator in the first single-port network, adjusting the length of the resonator when the deviation between the intermediate resonant frequency and the standard center frequency of the resonator is determined to be within a first predetermined deviation range; and for two adjacent resonators in the first single-port network, adjusting the distance between the two adjacent resonators when the deviation between the intermediate coupling coefficient and the standard coupling coefficient corresponding to the intermediate coupling coefficient is determined to be within a second predetermined deviation range.

[0017] According to an embodiment of the present invention, the above-mentioned method for adjusting the structural parameters of the microwave filter further includes: after adjusting the structural parameters of the first single-port network, determining the structural parameters of the microwave resonator based on the adjusted structural parameters of the first single-port network.

[0018] Another aspect of the present invention provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the structural parameter adjustment method of the microwave filter.

[0019] According to an embodiment of the present invention, since the intermediate resonant frequencies of each of the multi-order resonators in the first single-port network and the coupling coefficients between adjacent resonators in the first single-port network can be obtained based on the zero-frequency and pole-frequency of each of the multi-order resonators in the first single-port network, and based on these, the structural parameters of the first single-port network can be adjusted in a targeted manner based on multiple intermediate resonant frequencies, at least one intermediate coupling coefficient, and standard performance parameters corresponding to the microwave filter, thereby reducing the tuning difficulty of the microwave filter and making the adjustment process of the structural parameters of the microwave filter more efficient. Attached Figure Description

[0020] Figure 1 A flowchart illustrating a method for adjusting the structural parameters of a microwave filter according to an embodiment of the present invention is shown schematically.

[0021] Figure 2 A schematic diagram illustrating the structure of a second single-port network according to an embodiment of the present invention is shown.

[0022] Figure 3 A schematic diagram illustrating the structure of a third single-port network according to an embodiment of the present invention is shown.

[0023] Figure 4 A schematic diagram illustrating the structure of a first single-port network according to an embodiment of the present invention is shown.

[0024] Figure 5 A schematic diagram illustrating the input impedance simulation curve of a first single-port network according to an embodiment of the present invention is shown.

[0025] Figure 6 A schematic diagram of the overall structure of a microwave filter according to an embodiment of the present invention is shown.

[0026] Figure 7(a) schematically illustrates the S-characteristic curve of a microwave filter according to an embodiment of the present invention;

[0027] Figure 7(b) schematically illustrates the in-band ripple curve of a microwave filter according to an embodiment of the present invention; and

[0028] Figure 8 A block diagram of an electronic device suitable for implementing a method for adjusting the structural parameters of a microwave filter according to an embodiment of the present invention is shown schematically. Detailed Implementation

[0029] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the invention for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0030] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0031] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0032] When using expressions such as "at least one of A, B, and C," the expression should generally be interpreted in accordance with the meaning commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.). Similarly, when using expressions such as "at least one of A, B, or C," the expression should generally be interpreted in accordance with the meaning commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.).

[0033] To address the problem that the design of resonator-coupled microwave filters relies heavily on embedded optimization algorithms in commercial simulation software, and that the tuning process is difficult, potentially resulting in filters whose performance may not meet requirements, this invention proposes a method for adjusting the structural parameters of microwave filters.

[0034] For example, the zero-point and pole frequencies of each of the multi-order resonators in the first one-port network of the microwave filter are determined. Based on the zero-point and pole frequencies of each of the multi-order resonators in the first one-port network, the intermediate resonant frequencies of each of the multi-order resonators are obtained. For two adjacent resonators in the first one-port network, the intermediate coupling coefficient between the two adjacent resonators is obtained based on the zero-point, pole, and intermediate resonant frequencies associated with them. Based on multiple intermediate resonant frequencies, at least one intermediate coupling coefficient, and standard performance parameters corresponding to the microwave filter, the structural parameters of the first one-port network are adjusted.

[0035] According to an embodiment of the present invention, since the intermediate resonant frequencies of each of the multi-order resonators in the first single-port network and the coupling coefficients between adjacent resonators in the first single-port network can be obtained based on the zero-frequency and pole-frequency of each of the multi-order resonators in the first single-port network, and based on these, the structural parameters of the first single-port network can be adjusted in a targeted manner based on multiple intermediate resonant frequencies, at least one intermediate coupling coefficient, and standard performance parameters corresponding to the microwave filter, thereby reducing the tuning difficulty of the microwave filter and making the adjustment process of the structural parameters of the microwave filter more efficient.

[0036] Figure 1 A flowchart illustrating a method for adjusting the structural parameters of a microwave filter according to an embodiment of the present invention is shown.

[0037] like Figure 1 As shown, the method for adjusting the structural parameters of the microwave filter includes operations S110 to S140.

[0038] In operation S110, the zero-frequency and pole-frequency of each of the multi-order resonators in the first single-port network of the microwave filter are determined.

[0039] According to an embodiment of the present invention, a microwave filter may include a power input interface, a multi-order resonator, and a power output interface, wherein the order of the resonator in the microwave filter can be determined according to the actual situation.

[0040] According to embodiments of the present invention, the first one-port network may include a portion of the structure of a microwave filter, or it may include the entire structure of the microwave filter. For example, the first one-port network may include the feed input interface of the microwave filter and half-order resonators in the microwave filter, or the first one-port network may include the feed input interface of the microwave filter and resonators of all orders in the microwave filter. The total order of the resonators in the first one-port network can be selected according to the actual situation.

[0041] According to an embodiment of the present invention, the zero frequency can be the frequency of the input signal when the input impedance of the first single-port network is zero, and the pole frequency can be the frequency of the input signal when the input impedance of the first single-port network is an extreme value.

[0042] According to an embodiment of the present invention, for example, a first single-port network can be simulated using full-wave electromagnetic simulation software to obtain the input impedance simulation curve of the first single-port network. The full-wave electromagnetic simulation software can be software used for designing, analyzing, and optimizing electromagnetic components and systems. The input impedance simulation curve characterizes the relationship between the frequency of the input signal and the input impedance of the first single-port network. Then, with the input impedance of the first single-port network at zero, the zero-frequency and pole-frequency of the first-order resonator in the first single-port network are determined based on the input impedance simulation curve. Furthermore, based on the zero-frequency and pole-frequency of the first-order resonator, the zero-frequency and pole-frequency of other resonators besides the first-order resonator are calculated using multiple intermediate expressions. The intermediate expressions can characterize the relationship between the zero-frequency and pole-frequency of the first-order resonator and the zero-frequency and pole-frequency of other resonators.

[0043] In operation S120, the intermediate resonant frequencies of the multi-stage resonators are obtained based on their respective zero-point and pole frequencies in the first single-port network.

[0044] According to an embodiment of the present invention, the zero-frequency and pole-frequency of each of the multi-order resonators in the first single-port network can be used as input parameters of the formula, and the intermediate resonant frequency of each of the multi-order resonators can be calculated using the formula, wherein the formula is a formula characterizing the relationship between the zero-frequency and pole-frequency of each of the multi-order resonators and the intermediate resonant frequency of each of the multi-order resonators.

[0045] In operation S130, for two adjacent resonators in the multi-order resonator in the first single-port network, the intermediate coupling coefficient between the two adjacent resonators is obtained based on the zero frequency, pole frequency and intermediate resonant frequency associated with the two adjacent resonators.

[0046] According to an embodiment of the present invention, the zero-point frequency, pole frequency, and intermediate resonant frequency associated with two adjacent resonators can be used as input parameters of a formula, and the intermediate coupling coefficient between two adjacent resonators can be calculated using the formula. The formula is a formula characterizing the relationship between the zero-point frequency, pole frequency, and intermediate resonant frequency associated with two adjacent resonators and the intermediate coupling coefficient between two adjacent resonators.

[0047] In operation S140, the structural parameters of the first single-port network are adjusted based on multiple intermediate resonant frequencies, at least one intermediate coupling coefficient, and standard performance parameters corresponding to the microwave filter.

[0048] According to embodiments of the present invention, standard performance parameters can be parameters characterizing the functions that a microwave filter can achieve. Standard performance parameters of a microwave filter may include at least one of the following: standard filter type, standard center frequency, passband bandwidth, passband ripple, passband reflection loss, resonator order, filter prototype, standard quality factor, and standard coupling coefficient between two adjacent resonators. According to embodiments of the present invention, structural parameters may include: the distance between two adjacent resonators in the first single-port network and the length of each of the plurality of resonators in the first single-port network.

[0049] According to an embodiment of the present invention, multiple intermediate resonant frequencies and at least one intermediate coupling coefficient can be compared with the standard performance parameters corresponding to the microwave filter, and the structural parameters of the first single-port network can be adjusted according to the comparison results.

[0050] The method for adjusting the structural parameters of a microwave filter provided in the embodiments of the present invention can obtain the intermediate resonant frequencies of each of the multi-order resonators in the first single-port network and the coupling coefficients between adjacent resonators in the first single-port network based on the zero-frequency and pole-frequency of each of the multi-order resonators in the first single-port network. On this basis, based on multiple intermediate resonant frequencies, at least one intermediate coupling coefficient, and standard performance parameters corresponding to the microwave filter, the structural parameters of the first single-port network can be adjusted in a targeted manner, thereby reducing the tuning difficulty of the microwave filter and making the structural parameter adjustment process of the microwave filter more efficient.

[0051] According to embodiments of this disclosure, operation S110 may include the following operations.

[0052] With i=1, the first single-port network of the microwave filter is simulated to obtain the zero-frequency and pole-frequency of the first-order resonator in the first single-port network.

[0053] According to an embodiment of the present invention, when i=1, the first single-port network can be simulated using full-wave electromagnetic simulation software to obtain the simulated input impedance curve of the first single-port network. Then, when the input impedance of the first single-port network is zero, the zero-frequency and pole-frequency of the first-order resonator in the first single-port network are extracted based on the simulated input impedance curve.

[0054] According to an embodiment of the present invention, the intermediate resonant frequencies of the multi-stage resonators in the first single-port network can be obtained according to formula (1).

[0055]

[0056] Where i represents the order of the resonator. I represents the total order of the resonator. w 0iThe intermediate resonant frequency characterizes the i-th order resonator. The frequency of the t-th zero of the i-th resonator is 1≤t≤(I-i+1). The frequency of the qth pole of the i-th resonator is denoted by 1≤q≤(Ii).

[0057] According to an embodiment of the present invention, when i = 1, the intermediate resonant frequency of the first-order resonator can be obtained according to formula (2).

[0058]

[0059] Among them, w 01 The intermediate resonant frequency characterizes the first-order resonator. The zero-point frequency characterizes the first-order resonator. Characterizes the pole frequencies of a first-order resonator.

[0060] According to an embodiment of the present invention, operation S110 may include the following operations.

[0061] When 1 < i ≤ I, the second intermediate expression of order i is determined based on the first intermediate expression of order i-1. The first intermediate expression of order i is determined based on the second intermediate expression of order i-1, the second intermediate expression of order i, the intermediate resonant frequency of order i-1, and the intermediate coupling coefficient between the (i-1)th and i-th resonators. The zero frequency of the i-th resonator in the first single-port network is determined based on the second intermediate expression of order i. The pole frequency of the i-th resonator in the first single-port network is determined based on the first intermediate expression of order i.

[0062] According to an embodiment of the present invention, when 1 < i ≤ I, the first intermediate expression can be formula (3), and the second intermediate expression can be formula (4). I can be an integer greater than 1. I can be configured according to actual business needs, and is not limited here.

[0063]

[0064] P i (w 2 )=Q i-1 (w 2 (4)

[0065] Among them, w 2 The intermediate variable representing the connection between formulas (3) and (4) is w. 0(i-1) The m represents the intermediate resonant frequency of the (i-1)th order resonator. (i-1，i) Q represents the intermediate coupling coefficient between the (i-1)th order resonator and the i-th order resonator. i (w 2) represents the i-th order first intermediate expression. Q i-1 (w 2 ) represents the (i-1)th order first intermediate expression. P i (w 2 ) represents the i-th order second intermediate expression. P i-1 (w 2 ) represents the (i-1)th order second intermediate expression.

[0066] In P i (w 2 When ) = 0, obtain the values ​​of the Ii values ​​of w for the i-th order resonator, and use these w values ​​as the zero frequencies of the i-th order resonator. At this point, these zero frequencies are...

[0067] In Q i (w 2 When ) = 0, obtain the values ​​of Ii-1 w of the i-th order resonator, and use these w as the pole frequencies of the i-th order resonator. At this time, these pole frequencies are...

[0068] According to an embodiment of the present invention, when i = 1, the first intermediate expression can be formula (5) and the second intermediate expression can be formula (6).

[0069]

[0070]

[0071] According to an embodiment of the present invention, when i = 2, formulas (7) and (8) can be obtained from formulas (3)-(6):

[0072] P2(w 2 )=Q1(w 2 (7)

[0073]

[0074] Substitute formula (5) into formula (7), and let P2(w) 2 If ) = 0, the zero frequency of the second-order resonator can be determined.

[0075] Substitute equations (7) and (6) into equation (8), and let Q2(w) 2 If ) = 0, the pole frequency of the second-order resonator can be determined.

[0076] Similarly, the zero-point and pole frequencies of the multi-stage resonators in the first single-port network of the microwave filter can be determined according to formulas (3)-(6).

[0077] According to an embodiment of the present invention, the method for adjusting the structural parameters of a microwave filter provided by the present invention can determine the zero-point frequency and pole frequency of each of the multi-order resonators in the first single-port network, which prepares for obtaining the intermediate resonant frequency of each of the multi-order resonators in the first single-port network and the intermediate coupling coefficient between two adjacent resonators.

[0078] According to an embodiment of the present invention, the first single-port network may further include a feed input interface. Simulating the first single-port network of the microwave filter to obtain the zero-frequency and pole-frequency of the first-order resonator may include the following operations.

[0079] The initial interface distance and at least one initial resonator spacing distance of the first single-port network in the microwave filter are determined. The initial interface distance represents a virtual interface distance satisfying a first predetermined distance condition. The virtual interface distance represents the distance between the feed input interface and the first-order resonator of the microwave filter. The initial resonator spacing distance represents a virtual resonator spacing distance satisfying a second predetermined distance condition. The virtual resonator spacing distance represents the distance between two adjacent resonators in the microwave filter. With the microwave resonators satisfying the initial interface distance and at least one initial resonator spacing distance, the first-port network is simulated to obtain the zero-frequency and pole-frequency of the first-order resonator.

[0080] According to an embodiment of the present invention, the virtual interface distance satisfying a first predetermined distance condition can be determined as the initial interface distance. The first predetermined distance condition can characterize a virtual interface distance where the difference between the virtual quality factor of the second single-port network, composed of the feed input interface in the first single-port network and the first-order resonator of the microwave filter, and the standard quality factor in the standard performance parameters is less than or equal to a first predetermined threshold. The first predetermined threshold can be configured according to actual service requirements and is not limited herein. For example, the first predetermined threshold can be 0.

[0081] According to an embodiment of the present invention, the virtual resonator spacing distance that satisfies a second predetermined distance condition can be determined as the initial resonator spacing distance. The second predetermined distance condition characterizes a virtual resonator spacing distance such that the difference between the coupling coefficient between adjacent two-order resonators in a third single-port network (composed of the feed input interface in the first single-port network, the first-order resonator of the microwave filter, and the second-order resonator of the microwave filter) and the standard coupling coefficient in the standard performance parameters is less than or equal to a second predetermined threshold. The second predetermined threshold can be configured according to actual business requirements and is not limited herein. For example, the second predetermined threshold can be 0. According to an embodiment of the present invention, determining the initial interface distance and at least one initial resonator spacing distance of the first single-port network in the microwave filter can include the following operations.

[0082] Based on standard performance parameters and a first mapping set, the initial interface distance of the first single-port network is determined. The first mapping set includes multiple first mapping relationships. These first mapping relationships characterize the relationship between the virtual interface distance and the virtual quality factor of the second single-port network. The second single-port network includes a feed input interface and a first-order resonator. Based on standard performance parameters and a second mapping set, multiple initial resonator spacing distances are determined. The second mapping set includes multiple second mapping relationships. These second mapping relationships characterize the relationship between the virtual resonator spacing distance and the virtual coupling coefficient. The virtual coupling coefficient characterizes the coupling coefficient between two adjacent resonators in the microwave resonator.

[0083] According to an embodiment of the present invention, multiple first mapping relationships in the first mapping relationship set can be characterized by a relationship curve, thereby obtaining a first relationship curve between the virtual interface distance and the virtual quality factor of the second single-port network. When the virtual quality factor is equal to the standard quality factor in the standard performance parameters of the microwave filter, the virtual interface distance corresponding to the standard quality factor is determined according to the first relationship curve, and this virtual interface distance is determined as the initial interface distance of the first single-port network.

[0084] According to an embodiment of the present invention, multiple second mapping relationships in the second mapping relationship set can be characterized by a relationship curve, thereby obtaining a second relationship curve between the virtual resonator spacing distance and the virtual coupling coefficient. When the virtual coupling coefficient is equal to the standard coupling coefficient of the microwave filter, the virtual resonator spacing distance corresponding to the standard coupling coefficient is determined according to the second relationship curve, and this virtual resonator spacing distance is determined as the initial resonator spacing distance.

[0085] According to an embodiment of the present invention, the standard coupling coefficient of a microwave filter can characterize the standard value of the coupling coefficient between two adjacent resonators in the microwave filter. Therefore, based on the virtual coupling coefficient, the standard coupling coefficient of the microwave filter, and the second relationship curve, the virtual resonator spacing distances corresponding to the standard coupling coefficients of each two adjacent resonators in the microwave filter can be determined, and these virtual resonator spacing distances are determined as the initial resonator spacing distances.

[0086] According to an embodiment of the present invention, since the initial interface distance of the first single-port network is determined based on standard performance parameters and a first mapping relationship set, and the initial resonator spacing distance of the first single-port network is determined based on standard performance parameters and a second mapping relationship set, that is, the determination of the initial interface distance and the initial resonator spacing distance are both based on standard performance parameters. Therefore, the initial interface distance and the initial resonator distance are made close to the relevant parameters corresponding to the standard performance parameters, thereby reducing the gap between the initial interface distance and the initial resonator distance and the structural parameters of the finally designed microwave filter, thereby reducing the number of tuning operations and improving the tuning efficiency.

[0087] Figure 2 A schematic diagram of the structure of a second single-port network according to an embodiment of the present invention is shown.

[0088] like Figure 2 As shown, the second single-port network 200 may include a power input interface 210 and a first-order resonator 220. The virtual interface distance between the power input interface 210 and the first-order resonator 220 is da. By adjusting the virtual interface distance da, multiple second single-port networks 200 with different virtual interface distances da can be obtained.

[0089] According to an embodiment of the present invention, the second single-port network can be simulated using full-wave electromagnetic simulation software to obtain the group delay of the second single-port network. Based on the group delay of the second single-port network, the virtual quality factor of the second single-port network can be obtained using formula (9).

[0090]

[0091] Among them, Q E The virtual quality factor characterizes the second single-port network. w0 characterizes the standard center frequency of the microwave filter in the standard performance parameters. τ s11 (w0) characterizes the group delay of the single-port network 11 at the standard center frequency.

[0092] According to an embodiment of the present invention, the third single-port network can be simulated using full-wave electromagnetic simulation software to obtain the input impedance simulation curve of the third single-port network. Then, with the input impedance of the third single-port network being zero, the zero-point frequency and pole frequency of the first-order resonator in the third single-port network are determined based on the input impedance simulation curve. The third single-port network may include a second single-port network and a second-order resonator. The second-order resonator can be any resonator of any order other than the first-order resonator in the microwave filter. Based on the zero-point frequency and pole frequency, the intermediate resonant frequency of the first-order resonator in the third single-port network is obtained using formula (10), and the virtual coupling coefficient between two adjacent resonators in the third single-port network is obtained using formula (11).

[0093]

[0094]

[0095] Among them, w 01 The intermediate resonant frequency of the first-order resonator in the third single-port network is characterized. The frequency that represents the first zero of a first-order resonator. The frequency that represents the second zero of the first-order resonator. The frequency of the first pole of a first-order resonator is represented by m. 12 Characterizes the coupling coefficient between the first-order resonator and the second-order resonator.

[0096] Figure 3 A schematic diagram of the structure of a third single-port network according to an embodiment of the present invention is shown.

[0097] like Figure 3 As shown, the third single-port network 300 may include a first-order resonator 310 and a second-order resonator 320. The virtual resonator spacing between the first-order resonator 310 and the second-order resonator 320 is d. 1，2 By adjusting the spacing d of the virtual resonators 1，2 The virtual resonator spacing d can be obtained. 1，2 Multiple third single-port networks 300 are different. The multiple third single-port networks 300 are simulated by full-wave electromagnetic simulation software to obtain the zero-point frequency and pole frequency of each of the multiple third single-port networks 300. Based on the zero-point frequency and pole frequency, the virtual coupling coefficient between the first-order resonator 310 and the second-order resonator 320 in the multiple third single-port networks 300 is obtained by formula (11).

[0098] According to embodiments of the present invention, the standard performance parameters of a microwave filter may include at least one of the following: standard filter type, standard center frequency, passband bandwidth, passband ripple, passband reflection loss, resonator order, filter prototype, standard quality factor, and standard coupling coefficient between two adjacent resonators.

[0099] For example, standard filter type: microstrip filter; standard center frequency: 6.8 GHz; passband bandwidth: 360 MHz; passband ripple: <0.1 dB; passband reflection loss: >20 dB; resonator order: 15th order; filter prototype: Chebyshev; standard quality factor of microwave filter and standard coupling coefficient between two adjacent resonators in microwave filter.

[0100] According to an embodiment of the present invention, the process of obtaining the standard quality factor of the microwave filter and the standard coupling coefficient between two adjacent resonators in the microwave filter can be as follows: The Chebyshev g-factor is obtained by referring to the Chebyshev g-factor table in Table 1 (with a ripple coefficient of 0.01). The standard quality factor of the microwave filter is obtained using formula (12). The standard coupling coefficient between two adjacent resonators in the microwave filter is obtained using formula (13).

[0101] Table 1

[0102]

[0103]

[0104]

[0105] Among them, Q E Characterized by the standard quality factor. m i，i+1 The standard coupling coefficient between the i-th order resonator and the (i+1)-th order resonator in the microwave filter is represented by ω0. The standard center frequency of the microwave filter is represented by w0. The bandwidth of the microwave filter is represented by Δw. i Characterizing microwave filter design factors. i This can be obtained by querying Table 1.

[0106] The standard center frequency of the microwave filter, the standard quality factor of the microwave filter obtained from formula (11), and the standard coupling coefficient between two adjacent resonators in the microwave filter obtained from formula (12) are shown in Table 2.

[0107] Table 2

[0108] <![CDATA[f0]]> <![CDATA[Q E ]]> <![CDATA[m 1，2 ]]> <![CDATA[m 2，3 ]]> <![CDATA[m 3，4 ]]> <![CDATA[m 4，5 ]]> <![CDATA[m 5，6 ]]> <![CDATA[m 6，7 ]]> <![CDATA[m 7，8 ]]> 6800 15.7 2052.1 1375.5 1249.9 1205.8 1186.3 1176.9 1173.0

[0109] Since the microwave filter structural parameter adjustment method provided in this embodiment of the invention can simulate only half of the resonators, it is possible to calculate only up to m. 7，8 .

[0110] Substituting the standard quality factors from Table 2 into the first relationship curve, the initial interface distance is obtained. Substituting the standard coupling coefficients between adjacent resonators from Table 2 into the second relationship curve, the initial resonator spacing distance is obtained. The obtained initial interface distance d of the first single-port network in the microwave filter is then calculated. a The initial resonator spacing distance m i，i-1 (i≥1) are shown in Table 3:

[0111] Table 3

[0112] <![CDATA[d a ]]> <![CDATA[d 1，2 ]]> <![CDATA[d 2，3 ]]> <![CDATA[d 3，4 ]]> <![CDATA[d 4，5 ]]> <![CDATA[d 5，6 ]]> <![CDATA[d 6，7 ]]> <![CDATA[d 7，8 ]]> 0.1 0.35 0.475 0.5 0.51 0.522 0.525 0.525

[0113] Figure 4 A schematic diagram of the structure of a first single-port network according to an embodiment of the present invention is shown.

[0114] like Figure 4 As shown, the initial resonator spacing d between the first-order resonator and the second-order resonator in the first single-port network 400 1，2 The initial resonator spacing d between the second-order and third-order resonators is 0.35. 2，3 The initial resonator spacing d between the 3rd and 4th order resonators is 0.475. 3，4 The initial resonator spacing d between the 4th and 5th order resonators is 0.5. 4，5 The initial resonator spacing d between the 5th and 6th order resonators is 0.51. 5，6 The initial resonator spacing d between the 6th and 7th order resonators is 0.522. 6，7 The initial resonator spacing d between the 7th and 8th order resonators is 0.525. 7，8 It is 0.525.

[0115] According to embodiments of this disclosure, operation S120 may include the following operations.

[0116] In the case of 1≤i≤I, for the i-th resonator and the (i+1)-th resonator in a multi-order resonator, the intermediate coupling coefficient between the i-th resonator and the (i+1)-th resonator is obtained based on the zero frequency, pole frequency and intermediate resonant frequency of the i-th resonator.

[0117] According to an embodiment of the present invention, the intermediate coupling coefficient between the i-th resonator and the (i+1)-th resonator can be obtained according to formula (14).

[0118]

[0119] Where, m i，i+1 The intermediate coupling coefficient characterizes the relationship between the i-th order resonator and the (i+1)-th order resonator.

[0120] Figure 5 A schematic diagram of the input impedance simulation curve of a first single-port network according to an embodiment of the present invention is shown.

[0121] Figure 5 The input impedance simulation curve of the first single-port network in the simulation can be obtained using full-wave electromagnetic simulation software. Figure 4 The first single-port network 400 in the simulation was obtained. Figure 5 The vertical axis represents the input impedance of the first single-port network 400, and the horizontal axis represents the frequency of the input signal of the first single-port network 400.

[0122] according to Figure 5 Based on the simulation curves, with the input impedance of the first single-port network 400 being zero, the zero-frequency and pole-frequency of the first-order resonator in the first single-port network 400 are determined. Table 4 shows the zero-frequency and pole-frequency of the first-order resonator in the first single-port network 400.

[0123] Table 4

[0124]

[0125] Based on the zero-frequency and pole-frequency of the first-order resonator in Table 4, the intermediate resonant frequency of the first-order resonator is calculated using formula (1). Then, the zero-frequency and pole-frequency of the other resonators besides the first-order resonator are determined using formulas (2)-(5). Next, the intermediate resonant frequencies of the other resonators besides the first-order resonator are determined using formula (1). The intermediate coupling coefficient between two adjacent resonators in the first single-port network 400 is determined using formula (13). The intermediate resonant frequencies of each of the multi-order resonators in the first single-port network 400 and the intermediate coupling coefficients between two adjacent resonators are shown in Table 5.

[0126] Table 5

[0127]

[0128] According to embodiments of the present invention, the present invention can calculate the intermediate coupling coefficient between two adjacent resonators based on analytical expressions, which prepares for subsequent comparison with standard performance parameters and improves the tuning efficiency of microwave filters.

[0129] According to an embodiment of the present invention, operation S130 may include the following operations.

[0130] The tuning direction is determined based on multiple intermediate resonant frequencies, at least one intermediate coupling coefficient, and standard performance parameters corresponding to the microwave filter. The structural parameters of the first single-port network are then adjusted according to the tuning direction.

[0131] According to an embodiment of the present invention, the tuning direction can be: by adjusting the structural parameters of the first single-port network, the intermediate coupling coefficient between two adjacent resonators in the first single-port network satisfies a predetermined deviation range from the standard performance parameters.

[0132] According to an embodiment of the present invention, the intermediate coupling coefficient between each adjacent two-order resonator in the first single-port network can be compared with the standard coupling coefficient in the standard performance parameters. Then, based on the comparison results, it can be determined whether the intermediate coupling coefficient between adjacent two-order resonators in the first single-port network is within a predetermined deviation range from the standard performance parameters. Next, the tuning direction is determined based on the relationship between the comparison results and the preset deviation range, and the structural parameters of the first single-port network that need to be adjusted are adjusted according to the tuning direction.

[0133] According to embodiments of the present invention, the method for adjusting the structural parameters of a microwave filter provided by the present invention determines the tuning direction based on multiple intermediate resonant frequencies, at least one intermediate coupling coefficient, and standard performance parameters corresponding to the microwave filter. Therefore, the present invention can provide a tuning direction for adjusting the structural parameters of a microwave filter and improve the tuning efficiency of the microwave filter.

[0134] According to embodiments of this disclosure, standard performance parameters may include the standard center frequency of the microwave filter and the standard coupling coefficient between two adjacent resonators in the microwave filter.

[0135] According to an embodiment of the present invention, structural parameters may include the length of the resonator and the distance between two adjacent resonators.

[0136] According to an embodiment of the present invention, adjusting the structural parameters of the first single-port network according to the tuning direction may include the following operations.

[0137] For each resonator in the first single-port network, the length of the resonator is adjusted if the deviation between the resonator's intermediate resonant frequency and the standard center frequency falls within a first predetermined deviation range. For two adjacent resonators in the first single-port network, the distance between the two adjacent resonators is adjusted if the deviation between the intermediate coupling coefficient and the standard coupling coefficient corresponding to the intermediate coupling coefficient falls within a second predetermined deviation range.

[0138] According to an embodiment of the present invention, the deviation between the intermediate resonant frequency and the standard center frequency of the resonator represents the absolute value of the difference between the intermediate resonant frequency and the standard center frequency. A first predetermined deviation range represents the range within which the deviation between the intermediate resonant frequency and the standard center frequency does not conform to the performance specifications.

[0139] According to an embodiment of the present invention, for example, the first predetermined deviation range can be 20. When the deviation between the middle resonant frequency and the standard center frequency of the resonator is 25, the deviation between the middle resonant frequency and the standard center frequency of the resonator falls within the first predetermined deviation range, and the length of the resonator needs to be adjusted.

[0140] According to an embodiment of the present invention, the deviation between the intermediate coupling coefficient and the standard coupling coefficient corresponding to the intermediate coupling coefficient represents the absolute value of the difference between the intermediate coupling coefficient and the standard coupling coefficient corresponding to the intermediate coupling coefficient. The second predetermined deviation range represents the range within which the deviation between the intermediate coupling coefficient and the standard coupling coefficient corresponding to the intermediate coupling coefficient does not conform to the performance index.

[0141] According to an embodiment of the present invention, for example, the second predetermined deviation range can be 15. When the deviation between the intermediate coupling coefficient and the standard coupling coefficient corresponding to the intermediate coupling coefficient is 20, the deviation between the intermediate coupling coefficient and the standard coupling coefficient corresponding to the intermediate coupling coefficient falls within the second predetermined deviation range. In this case, it is necessary to adjust the distance between two adjacent resonators.

[0142] According to an embodiment of the present invention, for each resonator in the first single-port network, if it is determined that the intermediate resonant frequency of the resonator is greater than the standard center frequency and the deviation between the intermediate resonant frequency and the standard center frequency exceeds a first predetermined deviation range, the length of the resonator is increased. If it is determined that the intermediate resonant frequency of the resonator is less than the standard center frequency and the deviation between the intermediate resonant frequency and the standard center frequency exceeds a first predetermined deviation range, the length of the resonator is decreased.

[0143] According to an embodiment of the present invention, for two adjacent resonators in a first single-port network, if it is determined that the intermediate coupling coefficient is greater than the standard coupling coefficient corresponding to the intermediate coupling coefficient, and the deviation between the intermediate coupling coefficient and the standard coupling coefficient corresponding to the intermediate coupling coefficient exceeds a second predetermined deviation range, the distance between the two adjacent resonators is increased. If it is determined that the intermediate coupling coefficient is less than the standard coupling coefficient corresponding to the intermediate coupling coefficient, and the deviation between the intermediate coupling coefficient and the standard coupling coefficient corresponding to the intermediate coupling coefficient exceeds a second predetermined deviation range, the distance between the two adjacent resonators is decreased.

[0144] According to embodiments of the present invention, the first predetermined deviation range and the second predetermined deviation range can be configured according to business requirements, and are not limited herein. For example, when business requirements place high demands on the performance of the microwave filter, the first predetermined deviation range and the second predetermined deviation range can be reduced.

[0145] Table 6 is obtained by comparing the data in Table 5 with the corresponding data in Table 2.

[0146] Table 6

[0147]

[0148] As can be seen from the underlined data in Table 6, the intermediate resonant frequency w of the third-order resonator in the simulation parameters... 03The value is 6820, which is greater than the standard center frequency of 6800. The intermediate resonant frequency w of the 5th order resonator in the simulation parameters is... 05 It is less than the standard center frequency of 6800.

[0149] The first predetermined deviation range can be 15. At this time, the deviations of the intermediate resonant frequencies of the third and fifth resonators from the standard center frequency are 20 and 16, respectively. The deviations of the intermediate resonant frequencies of the third and fifth resonators from the standard center frequency both exceed the first predetermined deviation range, so the lengths of the third and fifth resonators need to be adjusted.

[0150] Since the middle resonant frequency of the third resonator is greater than the standard center frequency, the length of the third resonator needs to be increased. Since the middle resonant frequency of the fifth resonator is less than the standard center frequency, the length of the fifth resonator needs to be shortened.

[0151] The underlined data in Table 6 also shows that the intermediate coupling coefficient m between the second and third order resonators in the simulation parameters... 2，3 The intermediate coupling coefficient m between the 3rd and 4th order resonators in the simulation parameters is greater than the standard coupling coefficient of 1375.5. 3，4 It is also greater than the standard coupling coefficient of 1249.9.

[0152] The second predetermined deviation range can be 50, at which point the intermediate coupling coefficient m between the second resonator and the third resonator is... 2，3 The deviation from the standard coupling coefficient of 1375.5 is 65.2, and the intermediate coupling coefficient m between the 3rd and 4th order resonators is... 3，4 The deviation from the standard coupling coefficient of 1249.9 is 57.8, and the intermediate coupling coefficient m between the second and third order resonators is... 2，3 The deviation from the standard coupling coefficient and the intermediate coupling coefficient m between the 3rd and 4th order resonators 3，4 The deviations from the standard coupling coefficient all exceed the second threshold deviation range. Therefore, it is necessary to adjust the distances between the second and third order resonators and between the third and fourth order resonators.

[0153] Due to the intermediate coupling coefficient m between the second and third order resonators 2，3 The intermediate coupling coefficient m between the 3rd and 4th order resonators is greater than the standard coupling coefficient of 1375.5. 3，4 It is also greater than the standard coupling coefficient of 1249.9. Therefore, it is necessary to increase the distance between the second and third order resonators and the distance between the third and fourth order resonators in order to reduce the intermediate coupling coefficient between the second and third order resonators and the intermediate coupling coefficient between the third and fourth order resonators.

[0154] According to embodiments of this disclosure, the above-described method for adjusting the structural parameters of a microwave filter may further include the following operations.

[0155] After adjusting the structural parameters of the first single-port network, the structural parameters of the microwave resonator are determined based on the adjusted structural parameters of the first single-port network.

[0156] According to an embodiment of the present invention, when the order of the resonator of the microwave filter is less than 10, the structural parameters of the first single-port network can be determined as the structural parameters of the microwave resonator.

[0157] According to an embodiment of the present invention, when the order of the resonator of the microwave filter is greater than or equal to 10, the structural parameters of the first single-port network can be half of the structural parameters of the microwave filter. By mirroring the structure of the first single-port network, the other half of the structure of the microwave filter is obtained, thereby determining the overall structure and structural parameters of the microwave resonator.

[0158] According to an embodiment of the present invention, mirror-symmetrically transforming the structure of the first one-port network to obtain the other half of the microwave filter structure may include: when the resonator order I in the microwave filter is odd, mirror-symmetrically transforming the first (I-1) / 2 order resonators in the first one-port network about the (I+1) / 2 order resonator to obtain the other half of the microwave filter structure. When the resonator order I in the microwave filter is even, mirror-symmetrically transforming the first I / 2 order resonators in the first one-port network about the center lines of the I / 2 and I / 2+1 order resonators, while removing the I / 2+1 order resonator to obtain the other half of the microwave filter structure.

[0159] According to an embodiment of the present invention, since the present invention can determine the structural parameters of the microwave resonator based on the adjusted structural parameters of the first single-port network after the structural parameters of the first single-port network have been adjusted, the structure of the first single-port network can be mirror-symmetrically mirrored to obtain the other half of the structure of the microwave filter, thereby reducing simulation time and improving the overall efficiency of adjusting the structural parameters of the microwave filter.

[0160] According to an embodiment of the present invention, when the order of the designed microwave filter reaches ten or higher, the existing synthesis optimization method is extremely time-consuming and labor-intensive, and the performance of the designed microwave filter is not ideal. The microwave filter structure parameter adjustment method provided in this embodiment can accurately extract the effective parameters of the filter from the simulation results, and perform mirror symmetry on the structure of the adjusted first single-port network to obtain the other half of the microwave filter structure, reducing simulation time and number of simulations. Therefore, the method provided in this embodiment is more suitable for the synthesis design of high-order filters.

[0161] Figure 6 A schematic diagram of the overall structure of a microwave filter according to an embodiment of the present invention is shown.

[0162] By mirroring the structure of the first single-port network 400, the other half of the microwave filter structure is obtained, thereby determining the overall structure and structural parameters of the microwave resonator. The overall structure of the microwave filter is as follows: Figure 6 As shown.

[0163] Figure 7(a) schematically illustrates the S-characteristic curve of a microwave filter according to an embodiment of the present invention.

[0164] Figure 7(b) schematically illustrates the in-band ripple curve of a microwave filter according to an embodiment of the present invention.

[0165] Using full-wave electromagnetic simulation software to Figure 6 The microwave filter was simulated to obtain the S-characteristic curve and in-band ripple curve of the microwave filter. The S-characteristic curve and in-band ripple curve of the microwave filter are shown in Figure 7(a) and Figure 7(b), respectively.

[0166] As shown in Figure 7(a), the center frequency of the microwave filter is 6.8 GHz, the passband bandwidth is 360 MHz, and the in-band reflection loss is greater than 20 dB. As shown in Figure 7(b), the in-band ripple is less than 0.03 dB. The performance indicators of the microwave filter are completely consistent with the standard performance parameters.

[0167] Figure 8 A block diagram of an electronic device suitable for implementing a method for adjusting the structural parameters of a microwave filter according to an embodiment of the present invention is shown schematically.

[0168] like Figure 8 As shown, an electronic device 800 according to an embodiment of the present invention includes a processor 801, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 802 or a program loaded from a storage portion 808 into a random access memory (RAM) 803. The processor 801 may include, for example, a general-purpose microprocessor (e.g., a CPU), an instruction set processor and / or an associated chipset and / or a special-purpose microprocessor (e.g., an application-specific integrated circuit (ASIC)), etc. The processor 801 may also include onboard memory for caching purposes. The processor 801 may include a single processing unit or multiple processing units for performing different actions of the method flow according to an embodiment of the present invention.

[0169] RAM 803 stores various programs and data required for the operation of electronic device 800. Processor 801, ROM 802, and RAM 803 are interconnected via bus 804. Processor 801 executes various operations of the method flow according to embodiments of the present invention by executing programs in ROM 802 and / or RAM 803. It should be noted that programs may also be stored in one or more memories other than ROM 802 and RAM 803. Processor 801 may also execute various operations of the method flow according to embodiments of the present invention by executing programs stored in one or more memories.

[0170] According to an embodiment of the present invention, the electronic device 800 may further include an input / output (I / O) interface 805, which is also connected to a bus 804. The electronic device 800 may also include one or more of the following components connected to the I / O interface 805: an input section 806 including a keyboard, mouse, etc.; an output section 807 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 808 including a hard disk, etc.; and a communication section 804 including a network interface card such as a LAN card, modem, etc. The communication section 804 performs communication processing via a network such as the Internet. A drive 810 is also connected to the I / O interface 805 as needed. A removable medium 811, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on the drive 810 as needed so that computer programs read from it can be installed into the storage section 808 as needed.

[0171] The embodiments of the present invention have been described above. However, these embodiments are merely illustrative and not intended to limit the scope of the invention. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of the invention is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of the invention, and all such substitutions and modifications should fall within the scope of the invention.

Claims

1. A method for adjusting the structural parameters of a microwave filter, comprising: Determine the zero-frequency and pole-frequency of each of the multi-order resonators in the first single-port network of the microwave filter; Based on the zero-point frequency and pole frequency of each of the multi-order resonators in the first single-port network, the intermediate resonant frequency of each of the multi-order resonators is obtained. For two adjacent resonators in the multi-order resonators in the first single-port network, the intermediate coupling coefficient between the two adjacent resonators is obtained based on the zero frequency, pole frequency and intermediate resonant frequency associated with the two adjacent resonators. as well as Based on the multiple intermediate resonant frequencies, at least one intermediate coupling coefficient, and the standard performance parameters corresponding to the microwave filter, the structural parameters of the first single-port network are adjusted. Determining the zero-frequency and pole-frequency of each of the multi-order resonators in the first single-port network of the microwave filter includes: In the case that 1 < i ≤ I Based on the (i-1)th order first intermediate expression, determine the i-th order second intermediate expression; Based on the (i-1)th order second intermediate expression, the i-th order second intermediate expression, the (i-1)th order intermediate resonant frequency, and the intermediate coupling coefficient between the (i-1)th order resonator and the i-th order resonator, determine the i-th order first intermediate expression; Based on the second intermediate expression of order i, determine the zero-point frequency of the i-th order resonator in the first single-port network; and The pole frequency of the i-th order resonator in the first single-port network is determined based on the first intermediate expression of the i-th order. Where I is an integer greater than 1.

2. The method according to claim 1, wherein, Determining the zero-frequency and pole-frequency of each of the multi-order resonators in the first single-port network of the microwave filter includes: With i=1, the first single-port network of the microwave filter is simulated to obtain the zero-frequency and pole-frequency of the first-order resonator in the first single-port network.

3. The method according to claim 2, wherein, The first single-port network also includes a power input interface; The simulation of the first single-port network of the microwave filter to obtain the zero-frequency and pole-frequency of the first-order resonator includes: Determine the initial interface distance and at least one initial resonator spacing distance of the first single-port network in the microwave filter, wherein the initial interface distance represents a virtual interface distance satisfying a first predetermined distance condition, the virtual interface distance represents the distance between the feed input interface and the first-order resonator of the microwave filter, the initial resonator spacing distance represents a virtual resonator spacing distance satisfying a second predetermined distance condition, and the virtual resonator spacing distance represents the distance between two adjacent resonators in the microwave filter; and With the microwave filter satisfying the initial interface distance and the initial resonator spacing distance, the first port network is simulated to obtain the zero frequency and pole frequency of the first-order resonator.

4. The method according to claim 3, wherein, Determining the initial interface distance of the first single-port network and at least one initial resonator spacing distance in the microwave filter includes: Based on the standard performance parameters and the first mapping relationship set, the initial interface distance of the first single-port network is determined, wherein the first mapping relationship set includes multiple first mapping relationships, and the first mapping relationships characterize the relationship between the virtual interface distance and the virtual quality factor of the second single-port network, the second single-port network including the power input interface and the first-order resonator; and Based on the standard performance parameters and the second mapping relationship set, the initial resonator spacing distances are determined. The second mapping relationship set includes multiple second mapping relationships, which characterize the relationship between the virtual resonator spacing distances and the virtual coupling coefficients. The virtual coupling coefficients characterize the coupling coefficients between two adjacent resonators in the microwave filter.

5. The method according to any one of claims 1 to 4, wherein, For two adjacent resonators in the multi-order resonator, the intermediate coupling coefficient between the two adjacent resonators is obtained based on the zero-frequency, pole-frequency, and intermediate resonant frequency associated with the two adjacent resonators, including: In the case that 1 ≤ i ≤ I, for the i-th order resonator and the (i+1)-th order resonator in the multi-order resonator, The intermediate coupling coefficient between the i-th resonator and the (i+1)-th resonator is obtained based on the zero frequency, pole frequency, and intermediate resonant frequency of the i-th resonator.

6. The method according to any one of claims 1 to 4, wherein, The adjustment of the structural parameters of the first single-port network based on multiple intermediate resonant frequencies, at least one intermediate coupling coefficient, and standard performance parameters corresponding to the microwave filter includes: The tuning direction is determined based on the plurality of intermediate resonant frequencies, at least one intermediate coupling coefficient, and standard performance parameters corresponding to the microwave filter; and The structural parameters of the first single-port network are adjusted according to the tuning direction.

7. The method according to claim 6, wherein, The standard performance parameters include the standard center frequency of the microwave filter and the standard coupling coefficient between two adjacent resonators in the microwave filter. The structural parameters include the length of the resonator and the distance between two adjacent resonators; The step of adjusting the structural parameters of the first single-port network according to the tuning direction includes: For each resonator in the first single-port network, If the deviation between the resonant's intermediate resonant frequency and the standard center frequency falls within a first predetermined deviation range, the length of the resonant is adjusted; and For two adjacent resonators in the first single-port network, If the deviation between the intermediate coupling coefficient and the standard coupling coefficient corresponding to the intermediate coupling coefficient is determined to be within a second predetermined deviation range, the distance between the two adjacent resonators is adjusted.

8. The method according to any one of claims 1 to 4, further comprising: After adjusting the structural parameters of the first single-port network, the structural parameters of the microwave filter are determined based on the adjusted structural parameters of the first single-port network.

9. An electronic device, comprising: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method of any one of claims 1 to 8.

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