SRR-based antenna structure information determination method, manufacturing method and antenna

Abstract

The invention discloses an SRR-based antenna structure information determination method, a manufacturing method and an antenna, and relates to the technical field of patch antennae, and the method comprises the steps: obtaining an original antenna spectrogram, obtaining a processing antenna spectrogram, and comparing the original antenna spectrogram with the processing antenna spectrogram. According to the antenna processing method and the antenna processing device, the produced antenna can be redesigned and manufactured, so that the antenna can meet new use requirements.

Description

Technical Field

[0001] The present application relates to the technical field of patch antennas, and in particular to an antenna determination method, a manufacturing method and an antenna based on SRR. Background Art

[0002] Since it was proposed, the Split Ring Resonator (SRR) structure has become a research hotspot for technicians. It can not only be used as a building block of artificial metamaterials, but can also be used in the design of microwave devices such as filters, especially in the field of antennas.

[0003] Antennas are essential components in contemporary communication systems. They have the functions of radiating and receiving electromagnetic waves. The quality of their performance will directly determine whether the entire communication system can work properly. In order to increase the working frequency of the antenna, SRRs are often introduced into the antenna structure. When the existing open resonant ring is introduced into the antenna design, two or four identical and mutually symmetrical SRRs are generally loaded in the antenna to achieve multi-frequency points to improve the excitation effect. However, the introduction of multiple SRRs inevitably requires an increase in the design size of the overall antenna.

[0004] However, there are many antennas without SRR on the market, whose operating frequency and frequency band range can no longer meet the actual application requirements, resulting in a waste of resources. Summary of the invention

[0005] The purpose of this application is to provide an antenna determination method, a manufacturing method and an antenna based on SRR, which can redesign and manufacture an already produced antenna to meet new usage requirements.

[0006] To achieve the above objectives, this application provides the following solutions:

[0007] In a first aspect, the present application provides a method for determining antenna structure information based on SRR, specifically comprising:

[0008] Obtain an original antenna spectrum diagram; the original antenna spectrum diagram is a spectrum diagram obtained after simulating the performance of the original antenna; the original antenna is an antenna that does not contain a split resonant ring SRR.

[0009] Obtain a spectrum diagram of a processed antenna; the processed antenna is an antenna obtained by improving the structural information of the original antenna; the improvement of the structural information of the original antenna includes improving the metal ground structure of the original antenna and adding SRR on the surface of the original antenna; the spectrum diagram of the processed antenna is a spectrum diagram obtained after simulating the performance of the processed antenna.

[0010] Compare the original antenna spectrum diagram with the processed antenna spectrum diagram to determine whether the performance of the processed antenna meets the improvement requirements. If not, improve the structural information of the original antenna again until the performance of the processed antenna meets the improvement requirements. If so, output the structural information of the processed antenna.

[0011] Optionally, the metal ground structure of the original antenna is improved, specifically including:

[0012] The metal ground shape of the original antenna is improved to obtain a first improved antenna; the first improved antenna is an antenna obtained by adding a first side strip and a second side strip to the metal ground shape of the original antenna; one end of the first side strip is connected to the metal ground, and the other end of the first side strip is connected to one end of the second side strip; the magnetic flux lines of the original antenna are distributed in a direction different from the magnetic flux lines of the first improved antenna, and the first improved antenna is less difficult to excite SRR than the original antenna.

[0013] Optionally, adding an SRR on the surface of the original antenna specifically includes:

[0014] When the number of required frequency points is 1, a first frequency point target value corresponding to the required frequency point is determined.

[0015] An SRR is determined according to the size information of the original antenna and the first frequency target value in combination with an SRR resonant frequency calculation formula.

[0016] The original antenna is improved according to the determined SRR to obtain a second improved antenna; the second improved antenna includes the original antenna and an SRR; the SRR is located on the surface where the metal ground of the original antenna is located, and the SRR is insulated from the metal ground of the original antenna.

[0017] When the number of required frequency points is multiple, multiple frequency point target values ​​corresponding to the required frequency points are determined.

[0018] According to the size information of the original antenna and the multiple frequency target values, combined with the SRR resonant frequency calculation formula, multiple SRRs are determined.

[0019] According to the multiple SRRs, the original antenna is improved to obtain a third improved antenna; the third improved antenna includes the original antenna and the multiple SRRs; wherein, one SRR is located on the surface where the metal ground of the original antenna is located, and the remaining SRRs are located on the surface where the antenna body of the original antenna is located; one SRR is insulated from the metal ground of the original antenna, and the remaining SRRs are insulated from the antenna body of the original antenna; the number of SRRs is the same as the number of frequency target values.

[0020] Optionally, the improvement requirement is that the frequency point value added by the processed antenna is within an error range of 30% of the corresponding frequency point target value.

[0021] In a second aspect, the present application provides an antenna manufacturing method based on SRR, which uses any of the above optional methods to obtain structural information of a processed antenna, and processes the original antenna according to the structural information of the processed antenna to obtain a processed antenna.

[0022] In a third aspect, the present application provides an SRR-based antenna, comprising: an original antenna, an improved metal ground and an SRR.

[0023] The improved metal ground includes a first side strip and a second side strip, one end of the first side strip is connected to the metal ground of the original antenna, and the other end of the first side strip is connected to one end of the second side strip.

[0024] The SRR is used to increase the frequency of the original antenna, and each of the SRRs corresponds to a frequency target value.

[0025] When the number of the SRR is one, the SRR is located on the surface where the metal ground of the original antenna is located and is insulated from the metal ground of the original antenna.

[0026] When there are multiple SRRs, one SRR is located on the surface where the metal ground of the original antenna is located, and the remaining SRRs are located on the surface where the antenna body of the original antenna is located; one SRR is insulated from the metal ground of the original antenna, and the remaining SRRs are insulated from the antenna body of the original antenna.

[0027] Optionally, when the number of the SRR is 1, the SRR is located between the longitudinal center axis of the original antenna and the first side strip, and is also located between the transverse center axis of the original antenna and the metal ground.

[0028] Preferably, the frequency value corresponding to the SRR is 5.8 GHz; the number of rings of the SRR is 2, the copper cladding width is 0.3 mm, the SRR width is 2.5 mm, the interval between adjacent ring structures is 0.3 mm, and the opening size is 0.7 mm.

[0029] Optionally, when the number of SRRs is 2, they are a first SRR and a second SRR, respectively. The first SRR is located on the surface where the metal ground of the original antenna is located, and the first SRR is located between the longitudinal center axis of the original antenna and the first side strip, and at the same time between the transverse center axis of the original antenna and the metal ground; the second SRR is located on the surface where the antenna body of the original antenna is located, and the second SRR is located on the side of the longitudinal center axis of the original antenna that is biased toward the first side strip, and is located between the transverse center axis of the original antenna and the metal ground of the original antenna.

[0030] Preferably, the frequency value corresponding to the first SRR is 5.8 GHz; the number of rings of the first SRR is 2, the copper cladding width is 0.3 mm, the SRR width is 2.5 mm, the interval between adjacent ring structures is 0.3 mm, and the opening size is 0.7 mm.

[0031] The frequency value corresponding to the second SRR is 7.1 GHz; the number of rings of the second SRR is 2, the copper cladding width is 0.4 mm, the SRR width is 2.2 mm, the interval between adjacent ring structures is 0.6 mm, and the opening size is 0.6 mm.

[0032] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0033] The present application provides a method for determining antenna structure information based on SRR, a manufacturing method and an antenna, which can be used to modify an antenna that has already been produced and does not have an SRR structure. The performance of the original antenna can be adjusted without changing the size of the original antenna, and a new frequency point value can be introduced to meet the use requirements, thereby avoiding the waste of the antenna resources that have been produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 Flowchart of a method for determining antenna structure information based on SRR in one embodiment of the present application.

[0036] Figure 2 This is a front structural diagram of the original antenna in one embodiment of the present application.

[0037] Figure 3 This is a structural diagram of the back side of the original antenna in one embodiment of the present application.

[0038] Figure 4 Schematic diagram of the structure and parameters of SRR.

[0039] Figure 5 A perspective view of the antenna structure after the first SRR is introduced into the original antenna.

[0040] Figure 6 This is a schematic diagram of the back structure of the antenna after the first SRR is introduced into the original antenna.

[0041] Figure 7 To introduce the second SRR Figure 6 A perspective view of the antenna structure behind the antenna structure shown.

[0042] Figure 8 To introduce the second SRR Figure 6 A perspective view of the antenna structure behind the antenna structure shown.

[0043] Fig. 9 To introduce the second SRR Figure 6 A perspective view of the antenna structure behind the antenna structure shown.

[0044] Fig.10 for Fig. 9 The structure corresponds to the radiation pattern and gain diagram of the antenna at 6.1Ghz.

[0045] Fig.11 for Fig. 9 The structure corresponds to the radiation pattern and gain diagram of the antenna at 6.7Ghz.

[0046] Fig.12 for Figure 2 and Figure 3 Spectrum plot of the antenna structure shown.

[0047] Fig.13 for Figure 5 The structure corresponds to the spectrum diagram of the antenna.

[0048] Fig.14 for Figure 6 The structure corresponds to the spectrum diagram of the antenna.

[0049] Fig.15 for Figure 7 The structure corresponds to the spectrum diagram of the antenna.

[0050] Fig.16 for Figure 8 The structure corresponds to the spectrum diagram of the antenna.

[0051] Fig.17 for Fig. 9 The structure corresponds to the spectrum diagram of the antenna.

[0052] Fig.18 for Fig. 9 The structure corresponds to the spectrum diagram when the antenna does not contain a side strip structure.

[0053] Reference numerals:

[0054] 1. Original antenna, 101. Antenna body, 102. Metal ground, 2. First side strip, 3. Second side strip, 4. First SRR, 5. Second SRR. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0056] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0057] In an exemplary embodiment, Figure 1 As shown, a method for determining antenna structure information based on SRR is provided. The method is executed by a computer device, and can be executed by a computer device such as a terminal or a server alone, or can be executed by a terminal and a server together, and specifically includes:

[0058] Step 100: Obtain an original antenna spectrum diagram; wherein the original antenna spectrum diagram is a spectrum diagram obtained after simulating the performance of the original antenna; the original antenna is an antenna that does not contain a split resonant ring SRR.

[0059] Step 200: Obtain a frequency spectrum diagram of a processed antenna; wherein the frequency point processed antenna is an antenna obtained by improving the structural information of an original antenna; the improvement of the structural information of the original antenna includes improving the metal ground structure of the original antenna and adding an SRR to the surface of the original antenna; the frequency point processed antenna frequency spectrum diagram is a frequency spectrum diagram obtained by simulating the performance of the frequency point processed antenna.

[0060] Step 300: Compare the original antenna spectrum diagram with the frequency point processed antenna spectrum diagram to determine whether the performance of the processed antenna meets the improvement requirements, if not, execute step 400; if yes, execute step 500.

[0061] Step 400: re-improving the structural information of the original antenna until the performance of the processed antenna meets the improvement requirements.

[0062] Step 500: Output the structural information of the processed antenna.

[0063] In another exemplary embodiment of the present application, the improvement of the metal ground structure of the original antenna involved in step 200 is described in detail, specifically including:

[0064] Improve the structural information of the original antenna, improve the metal ground shape of the original antenna, and obtain a first improved antenna; the first improved antenna is an antenna obtained by adding a first side strip and a second side strip to the metal ground shape of the original antenna; one end of the first side strip is connected to the metal ground, and the other end of the first side strip is connected to one end of the second side strip; the magnetic flux lines of the original antenna are distributed in a different direction from the magnetic flux lines of the first improved antenna, and the first improved antenna is less difficult to excite SRR than the original antenna.

[0065] In another exemplary embodiment of the present application, the step of adding an SRR on the surface of the original antenna involved in step 200 is described in detail, and specifically includes:

[0066] When the number of required frequency points is 1, determine the first frequency point target value corresponding to the required frequency point, and determine an SRR based on the size information of the original antenna and the first frequency point target value in combination with the SRR resonant frequency calculation formula; finally, improve the original antenna according to the determined SRR to obtain a second improved antenna; the second improved antenna includes the original antenna and an SRR; the SRR is located on the surface where the metal ground of the original antenna is located, and the SRR is insulated from the metal ground of the original antenna.

[0067] When the number of required frequency points is multiple, multiple frequency target values ​​corresponding to the required frequency points are determined, and multiple SRRs are determined based on the size information of the original antenna and the multiple frequency target values ​​in combination with the SRR resonant frequency calculation formula; finally, the original antenna is improved based on the multiple SRRs to obtain a third improved antenna; the third improved antenna includes the original antenna and multiple SRRs; wherein one SRR is located on the surface where the metal ground of the original antenna is located, and the remaining SRRs are located on the surface where the antenna body of the original antenna is located; one SRR is insulated from the metal ground of the original antenna, and the remaining SRRs are insulated from the antenna body of the original antenna; the number of SRRs is the same as the number of frequency target values.

[0068] In another exemplary embodiment of the present application, the improvement requirement involved in step 300 is: the frequency point value added by the processed antenna is within an error range of 30% of the corresponding frequency point target value.

[0069] In an exemplary embodiment of the present application, a method for determining antenna structure information based on SRR is provided, which specifically includes:

[0070] A double-layer stepped patch antenna is selected as the original antenna 1, with a dielectric substrate of FR-4, a dielectric constant of 4.4, and an overall size of 35 mm long*35 mm wide*1.6 mm thick.

[0071] The original antenna 1 was simulated using CST 3D electromagnetic field simulation software. Figure 2 and Figure 3 They are respectively the front side (the side where the antenna body 101 is located) and the back side (the side where the metal ground 102 is located) structure of the original antenna 1. Fig.12 This is the spectrum diagram of the original antenna 1. At this time, the bandwidth BW = 1.75 GHz, and the S11 dip effect at the 5.5 GHz frequency point is not good. Its operating frequency and frequency band range can no longer meet the actual application requirements, and its performance needs to be improved, such as increasing the antenna frequency, widening the frequency band, and increasing the gain.

[0072] The shape of the metal ground 102 of the original antenna 1 is improved, that is, on the basis of the original shape of the metal ground 102, a first side strip 2 and a second side strip 3 are added, one end of the first side strip 2 is connected to the metal ground 102, and the other end of the first side strip 2 is connected to one end of the second side strip 3; after adding the side strip structure, the distribution direction of the magnetic flux lines of the antenna changes, which makes it easier for the antenna to excite the SRR.

[0073] Taking the application of antennas in multi-frequency fields such as wireless local area network WLAN and global microwave interconnection access WiMAX as an example, the original antenna 1 is structurally improved. The improvement requirement is to introduce a new frequency point with a target frequency point of 5.8GHz. The parameters are designed using the SRR design principle. The design principle is as follows:

[0074] The inductance and capacitance of the SRR are calculated according to the resonance calculation formula (Formula (1)):

[0075]

[0076] Among them, f0 is the frequency target value, L T is the total equivalent inductance of the SRR, C eq is the total equivalent capacitance of the SRR

[0077] Figure 4 In the figure, g1 and g2 both represent the opening size of the SRR, d represents the interval between adjacent ring structures of the SRR, c represents the copper width of the ring structure of the SRR, and a ext Indicates the width of the SRR.

[0078] Combination Figure 4 The structure and parameter diagram of the SRR shown in the figure and the following formulas (2) to (6) are used to obtain the constraints of the various parameters of the SRR and the inductance and capacitance, and to design a parameter group of the SRR that meets the requirements of the frequency target value f0.

[0079]

[0080]

[0081]

[0082]

[0083] l=8a ext -g (6)

[0084] Among them, C eq represents the total equivalent capacitance of the SRR, a avg represents the average ring size of the SRR, g represents the opening size of the SRR, and C pul represents the capacitance per unit length of the SRR, ε0 is the free space dielectric constant, c represents the copper width of the SRR ring structure, and t m is the thickness of the SRR (in this design = 0.035 mm), a ext represents the width of SRR, d represents the interval between adjacent ring structures of SRR, ε e Indicates the effective dielectric constant of the medium, c0 is a constant, c0 = 3*10 8 m / s, Z0 represents characteristic impedance, L T It represents the total equivalent inductance, γ is a constant, γ=2.853, and μH is the unit of inductance (microhenry).

[0085] According to the size and frequency target value of the original antenna 1, combined with the above SRR resonant frequency calculation formula and principle, the specific parameters of the first SRR4 are designed as follows: the number of rings is 2, the copper cladding width is 0.3mm, the SRR width is 2.5mm, the interval between adjacent ring structures is 0.3mm, and the opening size is 0.7mm.

[0086] The first SRR4 is introduced to the surface of the original antenna 1, so that it is located on the back of the original antenna 1 and is insulated from the metal ground 102 of the original antenna 1, as shown in FIG. Figure 5 shown.

[0087] right Figure 5 The antenna structure is simulated and tested to obtain the corresponding spectrum diagram, as shown in Fig.13 shown.

[0088] according to Fig.13 As shown in the spectrum diagram, this position ( Figure 5 Under the condition of (the position of the first SRR4 as shown in the figure), although the first SRR4 is also excited to work, there is still a gap between the theoretical and actual resonant frequencies. Therefore, the position of the first SRR4 is adjusted, and the performance is repeatedly tested to obtain the corresponding spectrum diagram until the excitation effect meets the improvement requirements.

[0089] Adjust the position of the first SRR4, such as Figure 6 As shown, Figure 6 The antenna structure is simulated and tested to obtain the corresponding antenna spectrum diagram, such as Fig.14shown.

[0090] This location ( Figure 6 The position of the first SRR4 is shown), frequency point 3 ( Fig.14 The 5.8 GHz corresponding to the frequency point shown in the figure is generated by the resonance of the first SRR4, which shows that the first SRR4 is not only successfully introduced but also achieves the consistency between theory and practice. It can be used in the wireless LAN frequency band to meet the improvement needs.

[0091] The simulation test proves that Figure 6 In the structure shown, when the vertical distance between the first SRR4 and the first edge of the original antenna 1 is 4 mm-8 mm, the excitation effect is better, wherein the first edge of the original antenna 1 is the edge of the original antenna 1 adjacent to the first side strip 2 .

[0092] by Figure 6 The antenna structure shown is used as a processed antenna, and the structural information of the processed antenna is output.

[0093] In the prior art, there are many antennas without SRR on the market, whose operating frequency and frequency band range can no longer meet the actual application requirements. When designing and producing some antennas, there is no extra space to accommodate SRR, so it is difficult to expand the performance of these antennas, resulting in a waste of resources. Therefore, it is necessary to consider improving the performance of the antenna without increasing the size of the original antenna, such as increasing the operating frequency and / or increasing the communication bandwidth, which is the main problem to be solved by the present invention.

[0094] In the method provided in the present application, when the original antenna is designed and manufactured, there is no need to consider the area and cross-sectional dimensions required for the open resonant ring to be introduced in the subsequent improvement process. The processed antenna still maintains the minimum size of the original antenna initially designed and manufactured, thereby achieving a balance of multiple performances such as small size, low profile, high gain, and multiple frequency points.

[0095] In an exemplary embodiment of the present application, a method for determining antenna structure information based on SRR is provided, which specifically includes:

[0096] The original antenna 1 of the previous embodiment is improved by adding two frequency points, namely 5.8 GHz and 7.1 GHz. The two frequency target values ​​correspond to two SRRs respectively. The method for obtaining the structural parameters of the SRR corresponding to 5.8 GHz is the same as that of the previous embodiment and will not be repeated here.

[0097] exist Figure 6 The antenna structure shown further increases the second frequency target value (7.1 GHz), corresponding to the second SRR5.

[0098] According to the size of the original antenna 1 and the target value of the second frequency point, combined with the SRR resonant frequency calculation formula, the specific parameters of the second SRR5 are: the number of rings is 2, the copper cladding width is 0.4mm, the SRR width is 2.2mm, the interval between adjacent ring structures is 0.6mm, and the opening size is 0.6mm.

[0099] The second SRR 5 is introduced to the surface of the original antenna 1 so that it is located on the front side of the original antenna 1 and is insulated from the antenna body 101 of the original antenna 1. Figure 7 shown.

[0100] right Figure 7 The antenna structure is simulated and tested to obtain the corresponding antenna spectrum diagram, such as Fig.15 shown.

[0101] according to Fig.15 From the spectrum diagram, we can see that this position ( Figure 7 Under the condition of the position of the second SRR5 shown in the figure, the 5.8Ghz frequency point caused by the resonance of the first SRR4 shifts (the addition of the second SRR5 affects the electrical length), and the second SRR5 is theoretically designed to work at 7.1Ghz, but this resonance point did not resonate successfully.

[0102] Therefore, the position of the second SRR5 is adjusted, and the performance is tested repeatedly to obtain the corresponding spectrum diagram until the excitation effect meets the improvement requirements.

[0103] Adjust the position of the second SRR5 to obtain Figure 8 The structure shown is Figure 8 The antenna structure is simulated and tested to obtain the corresponding antenna spectrum diagram, such as Fig.16 shown.

[0104] This location ( Figure 8 (the position of the second SRR5 shown in the figure), no resonant frequency point at 7.1 GHz is excited, and the introduction effect of the first SRR4 is weakened. Therefore, the improvement requirements are still not met.

[0105] Continue to adjust the position of the second SRR5 to obtain Fig. 9 The structure shown is Fig. 9 The antenna structure is simulated and tested to obtain the corresponding antenna spectrum diagram, such as Fig.17 shown.

[0106] according to Fig.17 From the content of Fig. 9 ), the resonant frequency of 6.87 GHz is successfully introduced, indicating that the second SRR5 is successfully introduced at this position, the bandwidth BW at the high frequency is significantly widened, and the application frequency band completely covers WLAN, which is very practical.

[0107] The frequency point added by the second SRR5 is consistent with the theoretical design value (7.1Ghz) (the error range is reasonable, that is, it meets the requirements: since the newly added topological structure will cause the electrical length of the antenna to change, the relative positions of the first SRR4 and the second SRR5 affect each other, the theory and practice can only be consistent as much as possible, and it is extremely difficult to achieve complete matching).

[0108] Compared with the antenna without SRR, the antenna with two SRRs has significantly better low-frequency performance, and the high-frequency bandwidth is also widened from 1 GHz to 1.5 GHz, which can better cover the Wimax and wireless LAN WLAN fields.

[0109] When analyzing whether the performance of the antenna meets the improvement requirements, the frequency information below -10dB displayed in the spectrum diagram is only one of the judgment methods. In order to ensure that the antenna of the corresponding structure can work well within the corresponding frequency range, the gain and radiation pattern can be obtained by simulating the antenna of the corresponding structure, and the maximum gain of a specific frequency can be analyzed through the information of the gain and radiation pattern. Fig. 9 The structure corresponds to the antenna, and the radiation pattern and gain near 7.1 GHz (for example, 6.1 GHz and / or 6.7 GHz) are analyzed.

[0110] Fig.10 for Fig. 9 The structure corresponds to the radiation pattern and gain diagram of the antenna at 6.1Ghz. Fig.11 for Fig. 9 The structure corresponds to the radiation pattern and gain diagram of the antenna at 6.7Ghz, Fig.10 , Fig.11 It can be seen that after loading two SRRs, the radiation pattern of the antenna at the 6.1Ghz frequency point in the xoz plane is shown in Figure 10. At this time, the maximum gain is 3.84dB. The radiation pattern of the antenna at the 6.7Ghz frequency point in the xoz plane is shown in Figure 10. Fig.11 As shown, the maximum gain is 2.99dB. From the radiation pattern and gain, it can be seen that two SRRs are successfully introduced into the original antenna structure. Therefore, by introducing two SRRs, the operating frequency band is optimized without changing the size of the original patch antenna (a manifestation of miniaturization), and the two commonly used frequency bands of Wimax and WLAN can be well covered; at the same time, the bandwidth at low and high frequencies is broadened, and the open resonant ring designed by two SRR theories is successfully introduced and multiple frequency points are realized, achieving high radiation efficiency and high gain of the antenna.

[0111] by Fig. 9 The antenna structure shown is used as a processed antenna, and the structural information of the processed antenna is output.

[0112] It can be concluded from the above two embodiments that the theoretical design of the first SRR is more consistent with the realized resonant frequency.

[0113] The first SRR4 is placed on the back of the original antenna 1 to facilitate the subsequent placement of the second SRR5 on the front of the original antenna 1, so that as many frequency points as possible can be introduced into the antenna within the small size limit, thereby broadening its high-frequency bandwidth / making it better applicable to a wide range of commonly used frequency bands.

[0114] Compared with the solution on the market that loads two identical and symmetrical SRRs in the antenna to achieve multiple frequency points, in the solution of the present application, the SRR excitation effect is better and the sink depth is deeper; the present design embodiment only uses one SRR, and by adjusting it to a special and reasonable position, it can achieve the same additional evaluation effect as the two SRRs of the same size and symmetrical structure in the prior art for multiple frequency points (that is, the SRR excitation effect is good, and the sink depth reaches below -20dB). Compared with the prior art, the present design application requires fewer SRRs to be introduced to achieve a single frequency point, has a simpler structure in industrial applications, and has lower processing costs.

[0115] Based on the particularity of the position of the first SRR4, it is placed on the back, and then the second SRR5 is introduced on the front. At this time, there is a principle that needs to be explained:

[0116] The newly added second SRR5 will change the original antenna topology, thus affecting the electrical length of the patch antenna and affecting its radiation effect and resonant frequency. Therefore, the rationality of the position of the second SRR5 (theoretical design frequency is 7.1Ghz) is crucial (importance is reflected in: 1. It is related to whether it can successfully achieve resonance; 2. After successful introduction, the deviation between the actual excited resonance point and the theoretical assumption is how to make it as consistent as possible / the bandwidth can be successfully expanded).

[0117] The method of the present application improves the performance of the antenna without increasing the size of the antenna. By introducing a certain number of open resonant rings into the original antenna to achieve the addition of new frequency points and the widening of the frequency band, the gain and radiation efficiency are improved. The method is simple and can be continuously adjusted and optimized, so that the same type of antenna can be simply modified to adapt to flexible and changeable application requirements, reducing the waste of resources.

[0118] In an exemplary embodiment, the present application provides an antenna manufacturing method based on SRR, which specifically includes: processing the original antenna 1 according to the structural information of the processed antenna obtained in the above embodiment to obtain the processed antenna.

[0119] In an exemplary embodiment of the present application, an SRR-based antenna is provided, the structure of which is as follows: Figure 6 As shown, it includes: an original antenna 1, an improved metal ground and one SRR (ie, the first SRR4).

[0120] The improved metal ground includes a first side strip 2 and a second side strip 3 , one end of the first side strip 2 is connected to the metal ground 102 of the original antenna 1 , and the other end of the first side strip 2 is connected to one end of the second side strip 3 .

[0121] The first SRR 4 is located on the surface where the metal ground 102 of the original antenna 1 is located and is insulated from the metal ground 102 of the original antenna 1 .

[0122] In another exemplary embodiment, the first SRR 4 is located between the longitudinal center axis of the original antenna 1 and the first side strip 2 , and is also located between the transverse center axis of the original antenna 1 and the metal ground 102 .

[0123] On the basis of the above embodiment, the structural information and corresponding frequency information of the first SRR are further defined, specifically, the frequency value corresponding to the first SRR4 is 5.8GHz; the number of rings of the first SRR4 is 2, the copper cladding width is 0.3mm, the SRR width is 2.5mm, the interval between adjacent ring structures is 0.3mm, and the opening size is 0.7mm. The widths of the first side strip 2 and the second side strip 3 are both within the range of 0.5mm-5mm.

[0124] In an exemplary embodiment of the present application, an SRR-based antenna is provided, the structure of which is as follows: Fig. 9 As shown, it includes: an original antenna 1, an improved metal ground and two SRRs, namely a first SRR4 and a second SRR5.

[0125] The improved metal ground includes a first side strip 2 and a second side strip 3 , one end of the first side strip 2 is connected to the metal ground 102 of the original antenna 1 , and the other end of the first side strip 2 is connected to one end of the second side strip 3 .

[0126] The first SRR4 is located on the surface where the metal ground 102 of the original antenna 1 is located and is insulated from the metal ground 102 of the original antenna 1. The second SRR5 is located on the surface where the antenna body 101 of the original antenna 1 is located and is insulated from the antenna body of the original antenna.

[0127] In another exemplary embodiment, the first SRR4 is located between the longitudinal center axis of the original antenna 1 and the first side strip 2, and between the transverse center axis of the original antenna 1 and the metal ground 102; the second SRR5 is located on the side of the longitudinal center axis of the original antenna 1 that is biased toward the first side strip 2, and between the transverse center axis of the original antenna 1 and the metal ground 102 of the original antenna 1.

[0128] On the basis of the above embodiment, the structural information and the corresponding frequency information of the first SRR are further limited. Specifically, the frequency value corresponding to the first SRR4 is 5.8 GHz; the number of rings of the first SRR4 is 2, the copper cladding width is 0.3 mm, the SRR width is 2.5 mm, the interval between adjacent ring structures is 0.3 mm, and the opening size is 0.7 mm.

[0129] The structural information and corresponding frequency information of the second SRR are further limited. Specifically, the frequency value corresponding to the second SRR5 is 7.1 GHz; the number of rings of the second SRR5 is 2, the copper cladding width is 0.4 mm, the SRR width is 2.2 mm, the interval between adjacent ring structures is 0.6 mm, and the opening size is 0.6 mm.

[0130] The antennas of the above-mentioned embodiments are achieved by modifying and reprocessing antennas without SRR structures, thereby introducing SRR without changing the size of the original antenna, and successfully introducing 5.8 GHz and / or 7.1 GHz frequencies that the original antenna does not have into the antenna, that is, correspondingly covering the two commonly used frequency bands of Wimax and WLAN, thereby expanding the scope of application of the antenna.

[0131] During design, when there are multiple SRRs, one SRR is located on the surface where the metal ground of the original antenna is located, and the remaining SRRs are located on the surface where the antenna body of the original antenna is located; one SRR is insulated from the metal ground of the original antenna, and the remaining SRRs are insulated from the antenna body of the original antenna.

[0132] In the above embodiments, a structural design of retaining side strips (corresponding to the first side strips and the second side strips) is adopted, and the side strips are connected to the metal ground 102 to better stimulate the SRR to work. The principle is:

[0133] SRR is a passive device. The principle of its excitation on the antenna is that it is excited by the magnetic field passing through the device. The magnetoelectricity enables it to successfully realize the new function of the frequency point.

[0134] The side strips are equivalent to optimizing and improving the structure of the ground. By adding the first side strip and the second side strip, the two side strips have an asymmetric structure, so that more magnetic flux lines can successfully pass through the first SRR4 and the second SRR5. The more magnetic flux lines pass through, the better the theoretical and practical excitation effects.

[0135] However, due to the current influence of the patch antenna and the backplane ground metal, the placement of the SRR is crucial.

[0136] After simulation, the side strip width is set within the range of 0.5mm-5mm, and the effect is better. It is set to about 2mm, and the effect is better. The side strip length is preferably set to the same length as the antenna side line (35mm is used in this embodiment).

[0137] by Fig. 9 Taking the antenna structure shown in FIG. 1 (wherein the first side strip 2 and the second side strip 3 are both rectangles of 2 mm to 35 mm) as an example, after removing the side strip structure, the spectrum diagram of the corresponding structure is obtained by simulation as shown in FIG. Fig.18 shown.

[0138] according to Fig.18 and Fig.17 From the effect comparison, it can be seen that after removing the side strip structure: the bandwidth at the low frequency is reduced from the original 1.75Ghz to 1.35Ghz; the resonance points at 4.2Ghz and 5.6Ghz are most likely provided by the original antenna (the spectrum diagram is the same before and after the introduction of SRR at this frequency point); compared with the case when SRR was not introduced, the newly added resonance frequency point at 4.5Ghz is quite different from the frequency target value (5.8Ghz and 7.1Ghz).

[0139] Therefore, the introduction of the side strips enables the SRR to be better stimulated to reach the theoretically designed resonance point, resulting in better antenna performance.

[0140] In an exemplary embodiment, an electronic device is provided, comprising any one of the above-mentioned SRR-based antennas, a circuit substrate, and a receiving device for fixing and / or installing the circuit substrate and the antenna.

[0141] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0142] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for determining antenna structure information based on SRR, characterized in that: The method for determining antenna structure information based on SRR includes: Obtaining an original antenna spectrum diagram; the original antenna spectrum diagram is a spectrum diagram obtained after simulating the performance of the original antenna; the original antenna is an antenna that does not contain a split resonant ring SRR; Obtaining a frequency spectrum diagram of a processed antenna; the processed antenna is an antenna obtained by improving the structural information of the original antenna; the improvement of the structural information of the original antenna includes improving the metal ground structure of the original antenna and adding an SRR on the surface of the original antenna; the frequency spectrum diagram of the processed antenna is a frequency spectrum diagram obtained by simulating the performance of the processed antenna; Compare the original antenna spectrum diagram with the processed antenna spectrum diagram to determine whether the performance of the processed antenna meets the improvement requirements. If not, improve the structural information of the original antenna again until the performance of the processed antenna meets the improvement requirements. If so, output the structural information of the processed antenna.

2. The method for determining antenna structure information based on SRR according to claim 1, characterized in that: The improvement of the metal ground structure of the original antenna specifically includes: The metal ground shape of the original antenna is improved to obtain a first improved antenna; the first improved antenna is an antenna obtained by adding a first side strip and a second side strip to the metal ground shape of the original antenna; one end of the first side strip is connected to the metal ground, and the other end of the first side strip is connected to one end of the second side strip; the magnetic flux lines of the original antenna are distributed in a direction different from the magnetic flux lines of the first improved antenna, and the first improved antenna is less difficult to excite SRR than the original antenna.

3. The method for determining antenna structure information based on SRR according to claim 1, characterized in that: Adding an SRR on the surface of the original antenna specifically includes: When the number of required frequency points is 1, determining the first frequency point target value corresponding to the required frequency point; Determine an SRR according to the size information of the original antenna and the first frequency target value in combination with an SRR resonant frequency calculation formula; The original antenna is improved according to the determined SRR to obtain a second improved antenna; the second improved antenna includes the original antenna and an SRR; the SRR is located on the surface where the metal ground of the original antenna is located, and the SRR is insulated from the metal ground of the original antenna; When the number of required frequency points is multiple, determining multiple frequency point target values ​​corresponding to the required frequency points; Determine multiple SRRs according to the size information of the original antenna and multiple frequency target values ​​in combination with a calculation formula for the SRR resonant frequency; According to the multiple SRRs, the original antenna is improved to obtain a third improved antenna; the third improved antenna includes the original antenna and the multiple SRRs; wherein, one SRR is located on the surface where the metal ground of the original antenna is located, and the remaining SRRs are located on the surface where the antenna body of the original antenna is located; one SRR is insulated from the metal ground of the original antenna, and the remaining SRRs are insulated from the antenna body of the original antenna; the number of SRRs is the same as the number of frequency target values.

4. The method for determining antenna structure information based on SRR according to claim 1, characterized in that: The improvement requirement is that the frequency point value added by the processed antenna is within an error range of 30% of the corresponding frequency point target value.

5. A method for manufacturing an antenna based on SRR, characterized in that: The SRR-based antenna manufacturing method comprises: According to the SRR-based antenna structure information determination method according to any one of claims 1-4, the structure information of the processed antenna is determined, and the original antenna is processed according to the structure information of the processed antenna to obtain the processed antenna.

6. An SRR-based antenna, characterized in that: The SRR-based antenna comprises: an original antenna, an improved metal ground and an SRR; The improved metal ground includes a first side strip and a second side strip, one end of the first side strip is connected to the metal ground of the original antenna, and the other end of the first side strip is connected to one end of the second side strip; The SRR is used to increase the frequency of the original antenna, and each of the SRRs corresponds to a frequency target value; When the number of the SRR is 1, the SRR is located on the surface where the metal ground of the original antenna is located and is insulated from the metal ground of the original antenna; When there are multiple SRRs, one SRR is located on the surface where the metal ground of the original antenna is located, and the remaining SRRs are located on the surface where the antenna body of the original antenna is located; one SRR is insulated from the metal ground of the original antenna, and the remaining SRRs are insulated from the antenna body of the original antenna.

7. The SRR-based antenna according to claim 6, characterized in that: When the number of the SRR is 1, the SRR is located between the longitudinal center axis of the original antenna and the first side strip, and is also located between the transverse center axis of the original antenna and the metal ground.

8. The SRR-based antenna according to claim 7, characterized in that: The frequency value corresponding to the SRR is 5.8 GHz; the number of rings of the SRR is 2, the copper cladding width is 0.3 mm, the SRR width is 2.5 mm, the interval between adjacent ring structures is 0.3 mm, and the opening size is 0.7 mm.

9. The SRR-based antenna according to claim 6, characterized in that: When the number of SRRs is 2, they are the first SRR and the second SRR respectively. The first SRR is located on the surface where the metal ground of the original antenna is located, and the first SRR is located between the longitudinal center axis of the original antenna and the first side strip, and at the same time between the transverse center axis of the original antenna and the metal ground; the second SRR is located on the surface where the antenna body of the original antenna is located, and the second SRR is located on the side of the longitudinal center axis of the original antenna that is biased towards the first side strip, and is located between the transverse center axis of the original antenna and the metal ground of the original antenna.

10. The SRR-based antenna according to claim 9, characterized in that: The frequency value corresponding to the first SRR is 5.8 GHz; the number of rings of the first SRR is 2, the copper cladding width is 0.3 mm, the SRR width is 2.5 mm, the interval between adjacent ring structures is 0.3 mm, and the opening size is 0.7 mm; The frequency value corresponding to the second SRR is 7.1 GHz; the number of rings of the second SRR is 2, the copper cladding width is 0.4 mm, the SRR width is 2.2 mm, the interval between adjacent ring structures is 0.6 mm, and the opening size is 0.6 mm.

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