Antenna characteristic mode selection test method based on ultra-short wave antenna structure

Abstract

The present disclosure provides an antenna characteristic mode selection test method based on an ultra-short wave antenna structure. The method includes obtaining the branch coupling state parameters of the antenna to be tested; performing coupled radiation differential processing on the branch coupling state parameters and the preset coupling state parameters to obtain the branch coupling differential component; sending an antenna radiation excitation on / off signal to the antenna characteristic mode system according to the branch coupling differential component to determine the resonant mode bandwidth of the antenna to be tested. After the branch coupling state parameters are collected, the branch coupling resonance conditions of each branch of the antenna to be tested are determined, and then the branch coupling state parameters are compared with the standard coupling state parameters to facilitate determination of the difference between the branch coupling resonance state of each branch of the antenna to be tested and the standard branch coupling resonance state. Finally, according to the above difference value, the feeding excitation mode of the antenna characteristic mode system is adjusted to facilitate obtaining the resonant mode bandwidth of the antenna to be tested, thereby facilitating the rapid selection of a wide-bandwidth antenna structure.

Description

Technical Field

[0001] The present disclosure relates to the field of antenna technology, and in particular to an antenna characteristic mode selection and testing method based on an ultra-short wave antenna structure. Background Art

[0002] With the development and advancement of technology, the requirements for antennas are becoming increasingly higher. For example, the frequency band of laptop WiFi antennas has expanded from WiFi 5 (5150MHz-5825MHz) to WiFi 6 (5925MHz-7125MHz). Therefore, the frequency band of laptop WiFi antennas needs to cover both 5150MHz-7125MHz, and the frequency band coverage is becoming wider and wider.

[0003] Laptop antennas operate in a complex environment, often using interference-resistant wire antennas such as PIFAs and monopoles. Due to the long transmission links and significant spatial losses, the demand for antenna efficiency is increasing, as exemplified by patent application publication number CN116259953A. However, laptop antennas must combine wide bandwidth with high efficiency, placing a high demand on antenna design structures that achieve both. Miniaturization has always been a key antenna characteristic. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an antenna characteristic mode selection test method based on an ultra-short wave antenna structure to quickly select a wide bandwidth antenna structure.

[0005] The purpose of this disclosure is achieved through the following technical solutions:

[0006] An antenna characteristic mode selection test method based on an ultra-short wave antenna structure includes: performing an antenna structure selection operation using an ultra-short wave antenna structure, wherein the ultra-short wave antenna structure includes:

[0007] An antenna to be tested, comprising a feeding branch, a first coupling branch, and a second coupling branch, wherein the first coupling branch is disposed between the feeding branch and the second coupling branch, the feeding branch, the first coupling branch, and the second coupling branch are sequentially spaced apart, a coupling end of the feeding branch is disposed opposite to a coupling end of the first coupling branch, the feeding end of the feeding branch is used for feeding excitation, and a coupling end of the second coupling branch is disposed toward the first coupling branch;

[0008] Antenna ground, to which the ground end of the first coupling branch and the ground end of the second coupling branch are both connected;

[0009] The antenna characteristic mode selection test method includes:

[0010] Obtaining branch coupling state parameters of the antenna to be tested;

[0011] Performing coupled radiation differential processing on the branch coupling state parameter and the preset coupling state parameter to obtain a branch coupling differential component;

[0012] An antenna radiation excitation on / off signal is sent to an antenna characteristic mode system according to the branch coupling differential component to determine the resonant mode bandwidth of the antenna to be tested.

[0013] In one embodiment, obtaining the branch coupling state parameter of the antenna to be tested includes: obtaining the branch coupling length of the antenna to be tested.

[0014] In one embodiment, performing coupled radiation differential processing on the branch coupling state parameter and the preset coupling state parameter to obtain the branch coupling differential component includes: calculating the difference between the branch coupling length and the preset coupling length to obtain the branch coupling length difference.

[0015] In one embodiment, the antenna radiation excitation start and stop signal is sent to the antenna characteristic mode system based on the branch coupling difference component to determine the resonant mode bandwidth of the antenna to be tested, including: detecting whether the branch coupling length difference matches the preset coupling length difference; when the branch coupling length difference matches the preset coupling length difference, sending the antenna radiation excitation start signal to the antenna characteristic mode system.

[0016] In one embodiment, obtaining the branch coupling state parameter of the antenna to be tested includes: obtaining the branch grounding height of the antenna to be tested.

[0017] In one embodiment, the coupling radiation differential processing of the branch coupling state parameter and the preset coupling state parameter to obtain the branch coupling differential component includes: calculating the difference between the branch grounding height and the preset grounding height to obtain the branch grounding height difference.

[0018] In one embodiment, the antenna radiation excitation on / off signal is sent to the antenna characteristic mode system based on the branch coupling difference component to determine the resonant mode bandwidth of the antenna to be tested, including: detecting whether the branch grounding height difference matches the preset grounding height difference; when the branch grounding height difference does not match the preset grounding height difference, sending the antenna radiation excitation off signal to the antenna characteristic mode system.

[0019] In one embodiment, the coupling length and grounding height of each branch of the antenna to be tested meet the following conditions:

[0020] Wherein, H is the height of the branch grounding, d is the branch coupling length, and λ is the wavelength of each resonant mode bandwidth of the antenna to be measured.

[0021] In one embodiment, the coupling lengths of the branches of the antenna to be tested meet the following conditions:

[0022]

[0023] In one embodiment, the coupling gap between the branches of the antenna to be tested meets the following condition: 0.1 mm≤slot≤0.8 mm, where slot is the coupling gap.

[0024] Compared with the prior art, the present disclosure has at least the following advantages:

[0025] After collecting the branch coupling state parameters, the branch coupling resonance conditions of each branch of the antenna to be tested are determined, and then the branch coupling state parameters are compared with the standard coupling state parameters to facilitate determining the difference between the branch coupling resonance state of each branch of the antenna to be tested and the standard branch coupling resonance state. Finally, based on the above difference value, the feeding excitation method of the antenna characteristic mode system is adjusted to facilitate obtaining the resonant mode bandwidth of the antenna to be tested, thereby facilitating the rapid selection of a wide-bandwidth antenna structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 Flowchart of an antenna characteristic mode selection test method based on an ultra-short wave antenna structure in one embodiment;

[0028] Figure 2 A schematic diagram of an ultra-short wave antenna structure in one embodiment;

[0029] Figure 3 Schematic diagram of the antenna to be tested in Example 1;

[0030] Figure 4 : is the excitation mode bandwidth diagram of the antenna to be tested in Example 1;

[0031] Figures 5 to 9 1 is a current distribution diagram of each excitation mode of Example 1;

[0032] Figure 10 Graph showing the efficiency and S-parameters of the antenna under test in Example 1;

[0033] Figure 11 Schematic diagram of the antenna to be tested in Example 2;

[0034] Figure 12 2 is a diagram of the bandwidth of the excitation mode of the antenna under test in Example 2;

[0035] Figures 13 to 16 2 is the current distribution diagram of each excitation mode of Example 2;

[0036] Figure 17 Schematic diagram of the antenna to be tested in Example 3;

[0037] Figure 18 3 is a diagram of the excitation mode bandwidth of the antenna to be tested in Example 3;

[0038] Figures 19 to 21 3 is the current distribution diagram of each excitation mode of Example 3;

[0039] Figure 22 Schematic diagram of the antenna to be tested in Example 4;

[0040] Figure 23 4 is a diagram of the bandwidth of the excitation mode of the antenna to be tested in Example 4;

[0041] Figures 24 to 25 4 is a current distribution diagram of each excitation mode of Example 4;

[0042] Figure 26 Schematic diagram of the antenna to be tested in Example 5;

[0043] Figure 27 This is a diagram of the excitation mode bandwidth of the antenna to be tested in Example 5. DETAILED DESCRIPTION

[0044] To facilitate understanding of the present disclosure, a more comprehensive description of the present disclosure will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure.

[0045] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. The terms used herein in the specification of this disclosure are intended only to describe specific embodiments and are not intended to limit this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0047] The present disclosure relates to an antenna characteristic mode selection test method based on an ultra-short wave antenna structure. In one embodiment, the antenna characteristic mode selection test method based on an ultra-short wave antenna structure includes obtaining the branch coupling state parameters of the antenna to be tested; performing coupled radiation differential processing on the branch coupling state parameters and the preset coupling state parameters to obtain the branch coupling differential component; and sending an antenna radiation excitation on / off signal to the antenna characteristic mode system according to the branch coupling differential component to determine the resonant mode bandwidth of the antenna to be tested. After the branch coupling state parameters are collected, the branch coupling resonance conditions of each branch of the antenna to be tested are determined, and then the branch coupling state parameters are compared with the standard coupling state parameters to facilitate determination of the difference between the branch coupling resonance state of each branch of the antenna to be tested and the standard branch coupling resonance state. Finally, according to the above difference value, the feeding excitation mode of the antenna characteristic mode system is adjusted to facilitate obtaining the resonant mode bandwidth of the antenna to be tested, thereby facilitating the rapid selection of a wide-bandwidth antenna structure.

[0048] See also Figure 1 , which is a flow chart of an antenna characteristic mode selection test method based on an ultra-short wave antenna structure according to an embodiment of the present disclosure. The antenna characteristic mode selection test method includes some or all of the following steps. Among them, the ultra-short wave antenna structure includes an antenna to be tested and an antenna ground; the antenna to be tested includes a feeding branch, a first coupling branch and a second coupling branch, the first coupling branch is arranged between the feeding branch and the second coupling branch, the feeding branch, the first coupling branch and the second coupling branch are arranged in sequence at intervals, the coupling end of the feeding branch is arranged opposite to the coupling end of the first coupling branch, the feeding end of the feeding branch is used for feeding excitation, and the coupling end of the second coupling branch is arranged toward the first coupling branch; the grounding end of the first coupling branch and the grounding end of the second coupling branch are both connected to the antenna ground.

[0049] The antenna characteristic mode selection test method includes:

[0050] S100: Obtain branch coupling state parameters of the antenna to be tested.

[0051] In this embodiment, the branch coupling state parameter is the coupling performance state of the current branch of the antenna under test. That is, the branch coupling state parameter is the state data of each branch of the antenna under test when coupling occurs. In other words, the branch coupling state parameter corresponds to the coupling resonance state of each branch of the antenna under test. By collecting the branch coupling state parameter, it is convenient to determine the occurrence of coupling resonance between the branches of the antenna under test.

[0052] S200: performing coupling radiation differential processing on the branch coupling state parameter and a preset coupling state parameter to obtain a branch coupling differential component.

[0053] In this embodiment, the branch coupling state parameter is the coupling performance state on the current branch of the antenna to be tested, that is, the branch coupling state parameter is the state data when the branches of the antenna to be tested are coupled, that is, the branch coupling state parameter corresponds to the coupling resonance of each branch of the antenna to be tested. By collecting the branch coupling state parameter, it is convenient to determine the occurrence of coupling resonance between the branches of the antenna to be tested. The preset coupling state parameter is the specified coupling performance state on the branch of the antenna to be tested, that is, the preset coupling state parameter is the standard state data when the branches of the antenna to be tested are coupled, that is, the preset coupling state parameter corresponds to the reference coupling resonance of each branch of the antenna to be tested. By differentially processing the coupled radiation of the branch coupling state parameter and the preset coupling state parameter to distinguish the coupling performance on the current branch of the antenna to be tested from the standard branch coupling performance, it is convenient to determine the degree of difference in branch coupling resonance of the antenna to be tested.

[0054] S300: Sending an antenna radiation excitation on / off signal to an antenna characteristic mode system according to the branch coupling differential component to determine a resonant mode bandwidth of the antenna to be tested.

[0055] In this embodiment, the branch coupling differential component is obtained based on the branch coupling state parameter and the preset coupling state parameter. The branch coupling state parameter is the coupling performance state on the current branch of the antenna to be tested, that is, the branch coupling state parameter is the state data when each branch of the antenna to be tested is coupled, that is, the branch coupling state parameter corresponds to the coupling resonance of each branch of the antenna to be tested. By collecting the branch coupling state parameter, it is convenient to determine the occurrence of coupling resonance between each branch of the antenna to be tested. The preset coupling state parameter is the specified coupling performance state on the branch of the antenna to be tested, that is, the preset coupling state parameter is the standard state data when each branch of the antenna to be tested is coupled, that is, the preset coupling state parameter corresponds to the reference coupling resonance of each branch of the antenna to be tested. By differentially processing the coupled radiation of the branch coupling state parameter and the preset coupling state parameter, the coupling performance on the current branch of the antenna to be tested is distinguished from the standard branch coupling performance, so as to facilitate the determination of the degree of difference in branch coupling resonance of the antenna to be tested. After obtaining the above-mentioned coupling resonance difference, the coupling state of each branch of the antenna to be tested is determined, which is convenient for determining the difference between the branch structure of the antenna to be tested and the branch structure of the standard antenna. Then, the antenna radiation excitation start and stop signal is sent to the antenna characteristic mode system to test the mode of the antenna to be tested when it is excited to radiate, so as to determine its resonant mode bandwidth during radiation, thereby facilitating the selection of the antenna to be tested with the required antenna structure.

[0056] In the above embodiment, after the branch coupling state parameters are collected, the branch coupling resonance conditions of each branch of the antenna to be tested are determined, and then the branch coupling state parameters are compared with the standard coupling state parameters to facilitate determining the difference between the branch coupling resonance state of each branch of the antenna to be tested and the standard branch coupling resonance state. Finally, based on the above difference value, the feeding excitation method of the antenna characteristic mode system is adjusted to facilitate obtaining the resonant mode bandwidth of the antenna to be tested, thereby facilitating the rapid selection of a wide-bandwidth antenna structure.

[0057] In one embodiment, the obtaining of the branch coupling state parameters of the antenna to be tested includes: obtaining the branch coupling length of the antenna to be tested. In this embodiment, the branch coupling state parameters are the coupling performance status on the current branches of the antenna to be tested, that is, the branch coupling state parameters are the state data when the branches of the antenna to be tested are coupled, that is, the branch coupling state parameters correspond to the coupling resonance conditions of the branches of the antenna to be tested. By collecting the branch coupling state parameters, it is convenient to determine the occurrence of coupling resonance between the branches of the antenna to be tested. The branch coupling state parameters include the branch coupling length of the antenna to be tested, and the branch coupling length is the length of the effective coupling area of the current branches of the antenna to be tested, that is, the branch coupling length is the length of the current coupling part of each branch of the antenna to be tested. By collecting the branch coupling length, it is convenient to determine the coupling forming structure of each branch of the antenna to be tested.

[0058] Furthermore, the branch coupling state parameter and the preset coupling state parameter are subjected to coupled radiation differential processing to obtain a branch coupling differential component, including: obtaining the difference between the branch coupling length and the preset coupling length to obtain the branch coupling length difference. In this embodiment, the branch coupling state parameter is the coupling performance state on the current branch of the antenna to be tested, that is, the branch coupling state parameter is the state data when each branch of the antenna to be tested is coupled, that is, the branch coupling state parameter corresponds to the coupling resonance condition of each branch of the antenna to be tested. By collecting the branch coupling state parameter, it is convenient to determine the coupling resonance condition between each branch of the antenna to be tested. The preset coupling state parameter is the specified coupling performance state on the branch of the antenna to be tested, that is, the preset coupling state parameter is the standard state data when each branch of the antenna to be tested is coupled, that is, the preset coupling state parameter corresponds to the reference coupling resonance condition of each branch of the antenna to be tested. By differentially processing the coupling radiation of the branch coupling state parameter and the preset coupling state parameter, the coupling performance on the current branch of the antenna to be tested is distinguished from the standard branch coupling performance, so as to facilitate the determination of the degree of difference in branch coupling resonance of the antenna to be tested. The branch coupling state parameter includes the branch coupling length of the antenna to be tested, and the branch coupling length is the length of the effective coupling area of each current branch of the antenna to be tested, that is, the branch coupling length is the length of the current coupling part of each branch of the antenna to be tested. By collecting the branch coupling length, it is convenient to determine the coupling forming structure of each branch of the antenna to be tested. The difference between the branch coupling length and the preset coupling length is obtained to facilitate the determination of the difference between the length of the current coupling part of each branch of the antenna to be tested and the standard coupling length, thereby facilitating the determination of the degree of difference between the coupling structure of the antenna to be tested and the coupling structure of the specified antenna.

[0059] Furthermore, the antenna radiation excitation on / off signal is sent to the antenna characteristic mode system based on the branch coupling difference component to determine the resonant mode bandwidth of the antenna to be tested, including: detecting whether the branch coupling length difference matches the preset coupling length difference; when the branch coupling length difference matches the preset coupling length difference, sending the antenna radiation excitation on signal to the antenna characteristic mode system. In this embodiment, the branch coupling difference component is obtained based on the branch coupling state parameter and the preset coupling state parameter. The branch coupling state parameter is the coupling performance state on the current branch of the antenna to be tested, that is, the branch coupling state parameter is the state data when each branch of the antenna to be tested is coupled, that is, the branch coupling state parameter corresponds to the coupling resonance condition of each branch of the antenna to be tested. By collecting the branch coupling state parameter, it is convenient to determine the occurrence of coupling resonance between the branches of the antenna to be tested. The preset coupling state parameter is a specified coupling performance state on the branch of the antenna to be tested, that is, the preset coupling state parameter is the standard state data when each branch of the antenna to be tested is coupled, that is, the preset coupling state parameter corresponds to the reference coupling resonance of each branch of the antenna to be tested. By differentially processing the coupling radiation of the branch coupling state parameter and the preset coupling state parameter, the coupling performance on the current branch of the antenna to be tested is distinguished from the standard branch coupling performance, so as to facilitate the determination of the degree of difference in branch coupling resonance of the antenna to be tested. After obtaining the above-mentioned coupling resonance difference, the coupling state of each branch of the antenna to be tested is determined, so as to facilitate the determination of the difference between each branch structure of the antenna to be tested and the standard antenna branch structure, and then send the antenna radiation excitation on / off signal to the antenna characteristic mode system to test the mode of the antenna to be tested when exciting radiation, so as to determine the resonant mode bandwidth when it radiates, so as to facilitate the selection of the antenna to be tested with the required antenna structure. The branch coupling state parameters include the branch coupling length of the antenna under test. The branch coupling length is the length of the effective coupling area of each branch of the antenna under test, that is, the length of the current coupling portion of each branch of the antenna under test. By collecting the branch coupling length, the coupling forming structure of each branch of the antenna under test can be determined. The difference between the branch coupling length and the preset coupling length is calculated to determine the difference between the length of the current coupling portion of each branch of the antenna under test and the standard coupling length, thereby facilitating the determination of the degree of difference between the coupling structure of the antenna under test and the coupling structure of the specified antenna.The branch coupling length difference matches the preset coupling length difference, indicating that the length of the current coupling part of each branch of the antenna to be tested is equivalent to the coupling length of the specified antenna structure, that is, it indicates that the coupling part structure of each branch of the antenna to be tested is the required coupling structure. At this time, an antenna radiation excitation start signal is sent to the antenna characteristic mode system to stimulate the resonant frequencies of each mode corresponding to the radiation of the antenna to be tested, thereby facilitating the determination of the radiation bandwidth of the antenna to be tested, and then facilitating the selection of the ultra-short wave antenna structure corresponding to the required bandwidth.

[0060] In another embodiment, when the branch coupling length difference does not match the preset coupling length difference, an antenna radiation excitation shut-off signal is sent to the antenna characteristic mode system, and antenna radiation excitation is not required.

[0061] In one embodiment, the obtaining of the branch coupling state parameters of the antenna to be tested includes: obtaining the branch grounding height of the antenna to be tested. In this embodiment, the branch coupling state parameters are the coupling performance status on the current branches of the antenna to be tested, that is, the branch coupling state parameters are the state data when the branches of the antenna to be tested are coupled, that is, the branch coupling state parameters correspond to the coupling resonance conditions of the branches of the antenna to be tested. By collecting the branch coupling state parameters, it is convenient to determine the occurrence of coupling resonance between the branches of the antenna to be tested. The branch coupling state parameters include the branch grounding height of the antenna to be tested, and the branch grounding height is the height of the effective grounding area of the current branches of the antenna to be tested, that is, the branch grounding height is the distance between the current coupling part of each branch of the antenna to be tested and the antenna ground. By collecting the branch grounding height, it is convenient to determine the grounding forming structure of each branch of the antenna to be tested.

[0062] Furthermore, the coupling radiation differential processing of the branch coupling state parameter and the preset coupling state parameter to obtain the branch coupling differential component includes: obtaining the difference between the branch grounding height and the preset grounding height to obtain the branch grounding height difference. In this embodiment, the branch coupling state parameter is the coupling performance state on the current branch of the antenna to be tested, that is, the branch coupling state parameter is the state data when each branch of the antenna to be tested is coupled, that is, the branch coupling state parameter corresponds to the coupling resonance condition of each branch of the antenna to be tested. By collecting the branch coupling state parameter, it is convenient to determine the coupling resonance condition between each branch of the antenna to be tested. The preset coupling state parameter is the specified coupling performance state on the branch of the antenna to be tested, that is, the preset coupling state parameter is the standard state data when each branch of the antenna to be tested is coupled, that is, the preset coupling state parameter corresponds to the reference coupling resonance condition of each branch of the antenna to be tested. By differentially processing the coupling radiation of the branch coupling state parameter and the preset coupling state parameter, the coupling performance on the current branch of the antenna to be tested is distinguished from the standard branch coupling performance, so as to facilitate the determination of the degree of difference in branch coupling resonance of the antenna to be tested. The branch coupling state parameter includes the branch grounding height of the antenna to be tested, and the branch grounding height is the height of the effective grounding area of each current branch of the antenna to be tested, that is, the branch grounding height is the distance between the current coupling part of each branch of the antenna to be tested and the antenna ground. By collecting the branch grounding height, it is convenient to determine the grounding forming structure of each branch of the antenna to be tested. The difference between the branch grounding height and the preset grounding height is obtained to facilitate the determination of the difference between the distance between the current coupling part of each branch of the antenna to be tested and the antenna ground and the standard grounding height, thereby facilitating the determination of the degree of difference between the grounding structure of the antenna to be tested and the grounding structure of the specified antenna.

[0063] Furthermore, the antenna radiation excitation on / off signal is sent to the antenna characteristic mode system based on the branch grounding difference component to determine the resonant mode bandwidth of the antenna to be tested, including: detecting whether the branch grounding height difference matches the preset grounding height difference; when the branch grounding height difference does not match the preset grounding height difference, sending an antenna radiation excitation off signal to the antenna characteristic mode system. In this embodiment, the branch grounding difference component is obtained based on the branch grounding state parameter and the preset grounding state parameter, and the branch grounding state parameter is the grounding performance state on the current branch of the antenna to be tested, that is, the branch grounding state parameter is the state data of each branch of the antenna to be tested when grounding occurs, that is, the branch grounding state parameter corresponds to the grounding resonance condition of each branch of the antenna to be tested. By collecting the branch grounding state parameter, it is convenient to determine the occurrence of grounding resonance between the branches of the antenna to be tested. The preset grounding state parameter is a specified grounding performance state on the branch of the antenna to be tested, that is, the preset grounding state parameter is the standard state data when each branch of the antenna to be tested is grounded, that is, the preset grounding state parameter corresponds to the reference grounding resonance of each branch of the antenna to be tested. By performing grounding radiation differential processing on the branch grounding state parameter and the preset grounding state parameter, the grounding performance on the current branch of the antenna to be tested is distinguished from the standard branch grounding performance, so as to facilitate the determination of the degree of difference in branch grounding resonance of the antenna to be tested. After obtaining the above-mentioned grounding resonance difference, the grounding state of each branch of the antenna to be tested is determined, so as to facilitate the determination of the difference between each branch structure of the antenna to be tested and the standard antenna branch structure, and then send an antenna radiation excitation on / off signal to the antenna characteristic mode system to test the mode of the antenna to be tested when exciting radiation, so as to determine the resonant mode bandwidth when it radiates, thereby facilitating the selection of the antenna to be tested with the required antenna structure. The branch grounding state parameters include the branch grounding height of the antenna under test. The branch grounding height is the height of the effective grounding area of each branch of the antenna under test, that is, the branch grounding height is the distance between the current grounded portion of each branch of the antenna under test and the antenna ground. By collecting the branch grounding height, it is convenient to determine the grounding structure of each branch of the antenna under test. The difference between the branch grounding height and the preset grounding height is calculated to facilitate the determination of the difference between the distance between the current grounded portion of each branch of the antenna under test and the antenna ground and the standard grounding height, thereby facilitating the determination of the degree of difference between the grounding structure of the antenna under test and the grounding structure of a specified antenna.The branch grounding height difference does not match the preset grounding height difference, indicating that the distance between the current grounding part of each branch of the antenna to be tested and the antenna ground is different from the grounding height of the specified antenna structure, that is, it indicates that the grounding part structure of each branch of the antenna to be tested is different from the required grounding structure. At this time, an antenna radiation excitation shutdown signal is sent to the antenna characteristic mode system, and there is no need to perform antenna radiation excitation, which facilitates the elimination of this antenna structure type.

[0064] In another embodiment, when the branch grounding height difference does not match the preset grounding height difference, an antenna radiation excitation start signal is sent to the antenna characteristic mode system. In this embodiment, the branch grounding height difference matches the preset grounding height difference, indicating that the distance between the current grounded portion of each branch of the antenna under test and the antenna ground is equivalent to the grounding height of the specified antenna structure, that is, indicating that the grounding portion structure of each branch of the antenna under test is the required grounding structure. At this time, the antenna radiation excitation start signal is sent to the antenna characteristic mode system to stimulate the resonant frequencies of each mode corresponding to the radiation of the antenna under test, thereby facilitating the determination of the radiation bandwidth of the antenna under test, and further facilitating the selection of the ultrashort wave antenna structure corresponding to the required bandwidth.

[0065] In one embodiment, the coupling length and grounding height of each branch of the antenna to be tested meet the following conditions: Wherein, H is the branch grounding height, d is the branch coupling length, and λ is the wavelength of each resonant mode bandwidth of the antenna under test. In this embodiment, each branch of the antenna under test includes a coupling portion and a grounding portion, and each branch has an "L"-shaped structure, that is, the feed branch, the first coupling branch, and the second coupling branch are "L"-shaped. See the attached figure for details. Figure 2 The branch coupling lengths of the feeding branch L1, the first coupling branch L2, and the second coupling branch L3 are the lengths of the portions of the branches of the antenna to be tested that are parallel to the antenna ground, and the branch grounding heights are the lengths of the portions of the branches of the antenna to be tested that are perpendicular to the antenna ground, i.e., the branch grounding heights are the distances between the portions of the branches of the antenna to be tested that are parallel to the antenna ground and the antenna ground. d2 is the branch coupling length of the first coupling branch L2, and H2 is the branch grounding height of the first coupling branch L2. By setting the range of the sum of the branch coupling lengths and the branch grounding heights, it is convenient to select the specific structures of the branches of the antenna to be tested, thereby facilitating the determination of the bandwidth of the antenna to be tested.

[0066] In another embodiment, the coupling lengths of the branches of the antenna to be tested satisfy the following conditions: By selecting the range of the branch coupling length, the structure of the coupling part of the antenna to be tested is better determined, which further facilitates the selection of the overall structure of the antenna to be tested.

[0067] In one embodiment, the coupling gap between each branch of the antenna to be tested satisfies the following condition: 0.1mm≤slot≤0.8mm, where slot is the coupling gap. In this embodiment, the coupling gap is the distance between two adjacent branches of the antenna to be tested, that is, the coupling gap is the spacing between the coupling parts of two adjacent branches of the antenna to be tested. By defining the coupling gap, it is easy to determine the distribution of each branch of the antenna to be tested, so that the radiation structure of the antenna to be tested is further refined. See Appendix Figure 2 , slot1 is a coupling gap between the coupling end of the feeding branch L1 and the coupling end of the first coupling branch L2.

[0068] In another embodiment, the obtaining of the branch coupling state parameters of the antenna to be tested further includes:

[0069] Obtaining a coupling gap of the antenna to be tested;

[0070] Detecting whether the coupling gap is smaller than a first preset gap;

[0071] When the coupling gap is smaller than the first preset gap, an antenna disconnect signal is sent to the antenna eigenmode system.

[0072] In this embodiment, the coupling gap is the distance between the coupled parts of two adjacent branches of the antenna to be tested, and the first preset gap is the minimum gap between any two adjacent branches of the antenna to be tested. The coupling gap is smaller than the first preset gap, indicating that the gap between two adjacent branches in the antenna to be tested is too small, that is, it indicates that the branches of the antenna to be tested are not interrupted. By sending an antenna branch breaking signal to the antenna characteristic mode system, the antenna to be tested is interrupted to form the required gap and number of branches, that is, the feeding branch, the first coupling branch and the second coupling branch are obtained.

[0073] Furthermore, the detecting whether the coupling gap is smaller than a first preset gap further includes:

[0074] When the coupling gap is greater than or equal to the first preset gap, detecting whether the coupling gap is greater than a second preset gap;

[0075] When the coupling gap is greater than the second preset gap, an antenna no-excitation alarm signal is sent to the antenna characteristic mode system.

[0076] In this embodiment, the coupling gap is greater than or equal to the first preset gap, indicating that the gaps between two adjacent branches in the antenna to be tested meet the requirements, that is, the gaps between the branches and the number of the antenna to be tested are similar to the structure of the ultrashort wave antenna to be selected. The second preset gap is the maximum gap allowed between any two adjacent branches of the antenna to be tested. The coupling gap is greater than the second preset gap, indicating that the gaps between two adjacent branches in the antenna to be tested are too large, that is, the coupling gap of the antenna to be tested exceeds the coupling gap of the ultrashort wave antenna to be selected. At this time, the characteristic mode of the antenna to be tested is close to 0, and the antenna structure in this mode cannot be excited and radiated. By sending an antenna no-excitation alarm signal to the antenna characteristic mode system, the antenna to be tested is eliminated, thereby facilitating the selection of the desired ultrashort wave antenna.

[0077] In another embodiment, when the coupling gap is less than or equal to the second preset gap, step S100 is performed.

[0078] By selecting the branch coupling length, branch grounding height, and coupling gap, combined with the current distribution of each mode obtained by characteristic mode analysis, the structure selection of the antenna to be tested is effectively improved, making it easier to select the required ultra-short wave antenna, see the following embodiments:

[0079] Example 1

[0080] The antenna to be tested consists of one feeding branch and five coupling branches, with the following structure: Figure 3 As shown, the corresponding five excitation mode bandwidths are as follows Figure 4 As shown, the current distribution of modes 1 to 5 is as follows Figures 5 to 9 In addition, the efficiency and S parameters of this structure are detailed in the attached Figure 10 .

[0081] Example 2

[0082] The antenna to be tested consists of one feeding branch and four coupling branches, with the following structure: Figure 11 As shown, the corresponding four excitation mode bandwidths are as follows Figure 12 As shown, the current distribution of modes 1 to 4 is as follows Figures 13 to 16 shown.

[0083] Example 3

[0084] The antenna to be tested consists of one feeding branch and three coupling branches, with the following structure: Figure 17 As shown, the corresponding three excitation mode bandwidths are as follows Figure 18 As shown, the current distribution of modes 1 to 3 is as follows Figures 19 to 21 shown.

[0085] Example 4

[0086] The antenna to be tested consists of one feeding branch and two coupling branches, with the following structure: Figure 22 As shown, the corresponding two excitation mode bandwidths are as follows Figure 23 As shown, the current distribution of mode 1 and 2 is as follows Figure 24 and 25 shown.

[0087] Example 5

[0088] The antenna to be tested consists of a feeding branch and a coupling branch, and its structure is as follows: Figure 26 As shown, the corresponding excitation mode bandwidth is as follows Figure 27 As shown, this antenna has no resonant mode in the 5-9 GHz frequency band.

[0089] Characteristic mode analysis shows that there are five L branches, resulting in five modes in the 5-9 GHz range. Reducing the number of branches reduces the number of modes by one. At least two modes are required to cover the Wi-Fi 6E band. To control the antenna size while also covering the Wi-Fi 6E band (5.15 GHz-7.13 GHz), a structure with two Ls was chosen as the antenna structure. Furthermore, the lengths of L1, L2, and L3 determine the resonant frequencies of each mode, namely the branch coupling length and the branch grounding height.

[0090] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person of ordinary skill in the art could make various modifications and improvements without departing from the spirit of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the present patent shall be determined by the appended claims.

Claims

1. An antenna characteristic mode selection test method based on an ultra-short wave antenna structure, characterized in that: include: The antenna structure selection operation is performed using an ultra-short wave antenna structure, wherein the ultra-short wave antenna structure includes: An antenna to be tested, comprising a feeding branch, a first coupling branch, and a second coupling branch, wherein the first coupling branch is disposed between the feeding branch and the second coupling branch, the feeding branch, the first coupling branch, and the second coupling branch are sequentially spaced apart, a coupling end of the feeding branch is disposed opposite to a coupling end of the first coupling branch, the feeding end of the feeding branch is used for feeding excitation, and a coupling end of the second coupling branch is disposed toward the first coupling branch; Antenna ground, to which the ground end of the first coupling branch and the ground end of the second coupling branch are both connected; The antenna characteristic mode selection test method includes: Acquire branch coupling state parameters of the antenna to be tested, where the branch coupling state parameters include a branch coupling length and a branch grounding height of the antenna to be tested; Performing coupled radiation differential processing on the branch coupling state parameter and the preset coupling state parameter to obtain a branch coupling differential component; An antenna radiation excitation on / off signal is sent to an antenna characteristic mode system according to the branch coupling differential component to determine the resonant mode bandwidth of the antenna to be tested.

2. The antenna characteristic mode selection test method based on the ultra-short wave antenna structure according to claim 1 is characterized in that: The step of performing coupled radiation differential processing on the branch coupling state parameter and the preset coupling state parameter to obtain a branch coupling differential component includes: The difference between the branch coupling length and the preset coupling length is calculated to obtain a branch coupling length difference.

3. The antenna characteristic mode selection test method based on the ultra-short wave antenna structure according to claim 2 is characterized in that: The sending of an antenna radiation excitation on / off signal to an antenna characteristic mode system according to the branch coupling differential component to determine the resonant mode bandwidth of the antenna to be tested includes: Detecting whether the branch coupling length difference matches a preset coupling length difference; When the branch coupling length difference matches the preset coupling length difference, an antenna radiation excitation start signal is sent to the antenna characteristic mode system.

4. The antenna characteristic mode selection test method based on the ultra-short wave antenna structure according to claim 1 is characterized in that: The step of performing coupled radiation differential processing on the branch coupling state parameter and the preset coupling state parameter to obtain a branch coupling differential component includes: The difference between the branch grounding height and the preset grounding height is calculated to obtain a branch grounding height difference.

5. The antenna characteristic mode selection test method based on the ultra-short wave antenna structure according to claim 4 is characterized in that: The sending of an antenna radiation excitation on / off signal to an antenna characteristic mode system according to the branch coupling differential component to determine the resonant mode bandwidth of the antenna to be tested includes: Detecting whether the branch grounding height difference matches a preset grounding height difference; When the branch grounding height difference does not match the preset grounding height difference, an antenna radiation excitation shut-off signal is sent to the antenna characteristic mode system.

6. The antenna characteristic mode selection test method based on the ultra-short wave antenna structure according to claim 1 is characterized in that: The coupling length and grounding height of each branch of the antenna to be tested meet the following conditions: H+d , where H is the branch grounding height, d is the branch coupling length, is the wavelength of each resonant mode bandwidth of the antenna to be tested.

7. The antenna characteristic mode selection test method based on the ultra-short wave antenna structure according to claim 6 is characterized in that: The coupling lengths of the branches of the antenna to be tested meet the following conditions: d 。 8. The antenna characteristic mode selection test method based on the ultra-short wave antenna structure according to claim 1 is characterized in that: The coupling gaps between the branches of the antenna to be tested meet the following conditions: slot , where slot is the coupling gap.

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