CN106910988B - Method and system for generating antenna pattern - Google Patents
Method and system for generating antenna pattern Download PDFInfo
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- CN106910988B CN106910988B CN201511034145.4A CN201511034145A CN106910988B CN 106910988 B CN106910988 B CN 106910988B CN 201511034145 A CN201511034145 A CN 201511034145A CN 106910988 B CN106910988 B CN 106910988B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/39—Circuit design at the physical level
- G06F30/392—Floor-planning or layout, e.g. partitioning or placement
Abstract
The invention discloses a method and a system for generating an antenna pattern, wherein the method comprises the following steps: obtaining input parameters, the input parameters including: a resonant frequency, an antenna impedance real part and an antenna impedance imaginary part; and according to the input parameters, obtaining the antenna pattern size corresponding to the input parameters based on the preset mathematical relationship between the antenna pattern size and the input parameters, and outputting the corresponding antenna pattern based on the antenna pattern size.
Description
Technical Field
The present invention relates to the field of antenna design technologies, and in particular, to a method and a system for generating an antenna pattern.
Background
The ultra-high Frequency Radio Frequency Identification (RFID) technology is a remote non-contact automatic Identification technology, and compared with the traditional high-Frequency technology, the ultra-high Frequency technology has the advantages that: long distance, multiple labels, high speed and convenient and fast operation.
The ultrahigh frequency antenna is an important component of the ultrahigh frequency tag. Often, RFID tag antenna design requires a professional antenna designer to perform time-intensive simulations using a professional design tool. Therefore, the existing RFID tag antenna design method is low in efficiency, consumes large manpower and material resources, and has high professional requirements on designers.
Disclosure of Invention
In order to solve the existing technical problems, embodiments of the present invention are directed to providing a method and a system for generating an antenna pattern.
To achieve the above object, the embodiments of the present invention are implemented in the following ways:
an embodiment of the present invention provides a method for generating an antenna pattern, where the method includes:
obtaining input parameters, the input parameters including: a resonant frequency, an antenna impedance real part and an antenna impedance imaginary part;
and according to the input parameters, obtaining the antenna pattern size corresponding to the input parameters based on the preset mathematical relationship between the antenna pattern size and the input parameters, and outputting the corresponding antenna pattern based on the antenna pattern size.
In the above solution, the mathematical relationship between the antenna pattern size and the input parameter is created based on the following ways:
designing a standard antenna, and determining a resonant frequency, an antenna impedance real part and an antenna impedance imaginary part of the standard antenna;
and carrying out bias on the resonance frequency, the antenna impedance real part and the antenna impedance imaginary part of the standard antenna, and determining and storing the mathematical relation among the different resonance frequencies, the antenna impedance real part and the antenna impedance imaginary part and the antenna pattern size.
In the above scheme, the standard antenna is a standard antenna suitable for a three-transmission-line T-type matching model.
In the above scheme, the standard antenna is a dipole antenna with a central annular structure.
In the above scheme, the output antenna pattern does not limit the antenna external radiator pattern, and the antenna external radiator pattern is an antenna part except for the antenna central annular matching structure.
An embodiment of the present invention further provides a system for generating an antenna pattern, where the system includes:
a parameter input unit for obtaining input parameters, the input parameters including: a resonant frequency, an antenna impedance real part and an antenna impedance imaginary part;
and the antenna pattern generating unit is used for obtaining the antenna pattern size corresponding to the input parameter according to the input parameter and based on the preset mathematical relationship between the antenna pattern size and the input parameter, and outputting the corresponding antenna pattern based on the antenna pattern size.
In the above solution, the system further includes: a mathematical relationship creating unit for creating a mathematical relationship of the antenna pattern dimensions and input parameters based on:
designing a standard antenna, and determining a resonant frequency, an antenna impedance real part and an antenna impedance imaginary part of the standard antenna;
and carrying out bias on the resonance frequency, the antenna impedance real part and the antenna impedance imaginary part of the standard antenna, and determining and storing the mathematical relation among the different resonance frequencies, the antenna impedance real part and the antenna impedance imaginary part and the antenna pattern size.
In the above scheme, the standard antenna is a standard antenna suitable for a three-transmission-line T-type matching model.
In the above scheme, the standard antenna is a dipole antenna with a central annular structure.
In the above scheme, the output antenna pattern does not limit an antenna external radiator pattern, and the antenna external radiator pattern is an antenna part except for an antenna central annular matching structure.
The method and the system for generating the antenna pattern provided by the embodiment of the invention greatly improve the design speed of the tag antenna, and simultaneously allow non-professional antenna designers to quickly obtain the tag antenna with good performance by using a simple method.
Drawings
Fig. 1 is a flowchart of a method for generating an antenna pattern according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a schematic configuration of an antenna pattern generating system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of critical dimensions of an antenna according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating simulation and test results of a standard antenna according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a resonant frequency pull-down simulation and test result according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of simulation and test results of pulling down the imaginary part of an impedance according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of simulation and test results of the impedance real part and imaginary part pull-up according to the embodiment of the present invention;
FIG. 8 is a diagram of a software interface capable of inputting parameters according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further elaborated below with reference to the drawings and the specific embodiments.
An embodiment of the present invention provides a method for generating an antenna pattern, as shown in fig. 1, which mainly includes:
And 102, obtaining the antenna pattern size corresponding to the input parameters according to the input parameters and based on the preset mathematical relationship between the antenna pattern size and the input parameters, and outputting the corresponding antenna pattern based on the antenna pattern size.
The embodiment of the invention can be based on a T-shaped matching model of three transmission lines of a tag antenna. The three-transmission-line T-type matching model provides a method for respectively adjusting the resonant frequency, the real part of the antenna impedance and the imaginary part of the antenna impedance. Namely, the relationship between the size of the antenna pattern and the resonance frequency of the antenna, the real part of the impedance of the antenna and the imaginary part of the impedance of the antenna is established, and the mutual influence of the size of the antenna pattern, the resonance frequency of the antenna, the real part of the impedance of the antenna and the imaginary part of the impedance of the antenna is reduced to.
Wherein the mathematical relationship of the antenna pattern dimensions and the input parameters is created based on:
1. a standard antenna is designed, and the resonant frequency, the antenna impedance real part and the antenna impedance imaginary part of the standard antenna are determined. A standard antenna suitable for a three-transmission-line T-shaped matching model, namely a dipole antenna comprising a central annular structure, needs to be designed; the resonant frequency, the real part of the impedance and the imaginary part of the impedance of the standard antenna are determined. Because the characteristics of the tag antenna are related to a plurality of factors such as an antenna base material, bonding pressure, an antenna material and the like, manufacturers for processing various flows need to be determined in advance, and then the resonant frequency, the real part of the antenna impedance and the imaginary part of the antenna impedance of the antenna are extracted through simulation tests and the like.
2. And carrying out bias on the resonance frequency, the antenna impedance real part and the antenna impedance imaginary part of the standard antenna, and determining and storing the mathematical relation among the different resonance frequencies, the antenna impedance real part and the antenna impedance imaginary part and the antenna pattern size. According to the three-transmission-line T-shaped matching model, the size of the antenna is approximately proportional to the characteristics of the antenna.
In addition, from the results of the first two steps, the software is compiled using a graphic generation tool based on the mathematical relationship of the antenna size and the antenna characteristics. Setting three input parameters as resonance frequency, real impedance part and imaginary impedance part, and establishing the relation between the antenna size and the resonance frequency, the real impedance part and the imaginary impedance part. Thus, the automation software inputs different resonant frequencies, real impedance parts and imaginary impedance parts and automatically generates the required antenna pattern.
It should be noted that the preparation of the method provided by the embodiment of the present invention is usually more investment than designing a single tag antenna. However, once completed, tag antennas of various impedances and various resonant frequencies can be automatically generated in a quick manner by a simple method.
Corresponding to the method for generating an antenna pattern in the embodiment of the present invention, an embodiment of the present invention further provides a system for generating an antenna pattern, as shown in fig. 2, the system mainly includes:
a parameter input unit 10, configured to obtain input parameters, where the input parameters include: a resonant frequency, an antenna impedance real part and an antenna impedance imaginary part;
and the antenna pattern generating unit 20 is configured to obtain an antenna pattern size corresponding to the input parameter according to the input parameter and based on a preset mathematical relationship between the antenna pattern size and the input parameter, and output a corresponding antenna pattern based on the antenna pattern size.
The system further comprises: a mathematical relationship creating unit 30 for creating a mathematical relationship of the antenna pattern dimensions and input parameters based on:
designing a standard antenna, and determining a resonant frequency, an antenna impedance real part and an antenna impedance imaginary part of the standard antenna;
and carrying out bias on the resonance frequency, the antenna impedance real part and the antenna impedance imaginary part of the standard antenna, and determining and storing the mathematical relation among the different resonance frequencies, the antenna impedance real part and the antenna impedance imaginary part and the antenna pattern size.
The method and system for generating an antenna pattern according to embodiments of the present invention are further described with reference to the following specific examples.
In the tag antenna adopted in the embodiment of the invention, the antenna material is aluminum etching, and the antenna substrate is Polyethylene Terephthalate (PET).
The embodiment of the invention respectively provides a standard antenna and simulation and test results of several antennas with biased resonant frequency, impedance real part and impedance imaginary part.
Firstly, a standard antenna is designed, and according to the characteristics of the ultrahigh frequency tag, the resonance of the antenna is 880MHz, the impedance real part is 15ohm, and the impedance imaginary part is 100 ohm. Standard antenna pattern as shown in fig. 3, according to the three transmission line T-type matching circuit model, the total antenna length a1 is related to the resonant frequency, the contact point spacing a2 is related to the real part of the antenna, and the loop width a3 is related to the imaginary part of the antenna.
Then, parameter extraction is carried out, in the embodiment, the parameter extraction is carried out through simulation data, and it is concluded that the lengths of a1, a2 and a3 are approximately in direct proportion to the resonant frequency, the real impedance part and the imaginary impedance part of the antenna respectively. And summing up the mathematical relations of the lengths of a1, a2 and a3, the resonant frequency, the real part of impedance and the imaginary part of impedance under the condition of direct proportion.
And finally, realizing a parameterizable software interface, and establishing a relation between the input resonant frequency, the impedance real part, the impedance imaginary part and the lengths of the antenna patterns a1, a2 and a3 by using software according to the mathematical relation between the lengths of a1, a2 and a3, the resonant frequency, the impedance real part and the impedance imaginary part obtained by parameter extraction, so that the automation process can be completed.
Fig. 4-6 show the results of antenna testing and simulation, where the solid line is the simulation value and the dashed line is the test value, and it can be seen that the simulation and test values substantially match.
Wherein the content of the first and second substances,
FIG. 4 is the test and simulation results for a standard antenna, 880MHz, real impedance 15ohm, imaginary impedance 100 ohm;
FIG. 5 is the results of testing and simulation of resonance frequency pull down, 840MHz, real impedance 15ohm, imaginary impedance 100 ohm;
FIG. 6 shows the results of tests and simulations with impedance pulling down at 880MHz, real impedance at 15 ohms, and imaginary impedance at 80 ohms;
FIG. 7 shows the results of testing and simulation of the impedance pulling up of the real and imaginary parts, 880MHz, 20ohm impedance and 120ohm impedance.
From the above test and simulation results, it can be seen that the simulation and measured values substantially match the given set values.
FIG. 8 is a software interface diagram into which parameters may be entered, wherein the resonant frequency, the real part of the impedance, and the imaginary part of the impedance may be set. The key antenna pattern sizes a1, a2 and a3 are written as functions of resonance frequency, real impedance part and imaginary impedance part, and the antenna pattern can be automatically generated by clicking a button to generate the antenna pattern, so that the antenna design process is rapid and accurate.
In summary, the embodiment of the present invention proves that the method according to the embodiment of the present invention can realize automatic generation of an antenna pattern. Finally, the basis of the invention is based on a T-shaped matching model of three transmission lines, so that the external radiator pattern of the antenna can be not limited, and the external radiator antennas in various shapes can finish the automatic design process according to the embodiment of the invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (6)
1. A method of generating an antenna pattern, the method comprising:
obtaining input parameters, the input parameters including: a resonant frequency, an antenna impedance real part and an antenna impedance imaginary part; according to the input parameters, obtaining antenna pattern sizes corresponding to the input parameters based on a preset mathematical relationship between the antenna pattern sizes and the input parameters, and outputting corresponding antenna patterns based on the antenna pattern sizes, wherein the mathematical relationship between the antenna pattern sizes and the input parameters is created based on the following mode:
designing a standard antenna, and determining a resonant frequency, an antenna impedance real part and an antenna impedance imaginary part of the standard antenna, wherein the standard antenna is a standard antenna suitable for a three-transmission-line T-shaped matching model, two connection intersections exist between a central annular structure and an external metal radiator of the antenna, and the length of a short-circuit metal wire between the two connection intersections is called as an antenna contact point distance (a 2); wherein the resonance frequency is related to the total length (a1) of the antenna, the real part of the antenna impedance is related to the contact point spacing (a2), and the imaginary part of the antenna impedance is related to the loop width (a 3);
and carrying out bias on the resonance frequency, the antenna impedance real part and the antenna impedance imaginary part of the standard antenna, determining and storing different resonance frequencies, antenna impedance real parts and antenna impedance imaginary parts, and establishing a mathematical relation between different data and antenna pattern sizes.
2. The method for generating an antenna pattern according to claim 1, wherein said standard antenna is a dipole antenna having a central loop structure.
3. The method of claim 2, wherein the outputted antenna pattern does not define an antenna outer radiator pattern, which is an antenna portion other than a central loop matching structure of the antenna.
4. A system for generating an antenna pattern, said system comprising:
a parameter input unit for obtaining input parameters, the input parameters including: a resonant frequency, an antenna impedance real part and an antenna impedance imaginary part; an antenna pattern generating unit for obtaining an antenna pattern size corresponding to the input parameter based on a preset mathematical relationship between the antenna pattern size and the input parameter according to the input parameter, and outputting a corresponding antenna pattern based on the antenna pattern size, and a mathematical relationship creating unit for creating the mathematical relationship between the antenna pattern size and the input parameter based on:
designing a standard antenna, and determining a resonant frequency, an antenna impedance real part and an antenna impedance imaginary part of the standard antenna, wherein the standard antenna is a standard antenna suitable for a three-transmission-line T-shaped matching model, two connection intersections exist between a central annular structure and an external metal radiator of the antenna, and the length of a short-circuit metal wire between the two connection intersections is called as an antenna contact point distance (a 2); wherein the resonance frequency is related to the total length (a1) of the antenna, the real part of the antenna impedance is related to the contact point spacing (a2), and the imaginary part of the antenna impedance is related to the loop width (a 3);
and carrying out bias on the resonance frequency, the antenna impedance real part and the antenna impedance imaginary part of the standard antenna, determining and storing different resonance frequencies, antenna impedance real parts and antenna impedance imaginary parts, and establishing a mathematical relation between different data and antenna pattern sizes.
5. The system for generating antenna patterns according to claim 4, wherein said standard antenna is a dipole antenna with a central loop structure.
6. The system of claim 5, wherein said output antenna pattern does not define an antenna outer radiator pattern, said antenna outer radiator pattern being an antenna portion other than a central loop matching structure of the antenna.
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Citations (6)
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| US5719794A (en) * | 1995-07-19 | 1998-02-17 | United States Of America As Represented By The Secretary Of The Air Force | Process for the design of antennas using genetic algorithms |
| CN1612142A (en) * | 2003-10-30 | 2005-05-04 | 松下电器产业株式会社 | Design method for antenna and antenna using the same |
| CN101855781A (en) * | 2007-10-11 | 2010-10-06 | 3M创新有限公司 | RFID label with modified model dipole antenna |
| CN101950854A (en) * | 2010-08-27 | 2011-01-19 | 电子科技大学 | Electronic tag antenna |
| CN103270511A (en) * | 2010-09-15 | 2013-08-28 | 多康公司 | Automated antenna builder and antenna repository |
| CN104485508A (en) * | 2014-12-19 | 2015-04-01 | 夏景 | Complex impedance RFID (radio frequency identification) bow-tie-shaped printing antenna |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647146B (en) * | 2013-12-03 | 2016-03-30 | 北京中电华大电子设计有限责任公司 | Ultra-high frequency RFID label antenna impedance matching method and circuit |
-
2015
- 2015-12-23 CN CN201511034145.4A patent/CN106910988B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5719794A (en) * | 1995-07-19 | 1998-02-17 | United States Of America As Represented By The Secretary Of The Air Force | Process for the design of antennas using genetic algorithms |
| CN1612142A (en) * | 2003-10-30 | 2005-05-04 | 松下电器产业株式会社 | Design method for antenna and antenna using the same |
| CN101855781A (en) * | 2007-10-11 | 2010-10-06 | 3M创新有限公司 | RFID label with modified model dipole antenna |
| CN101950854A (en) * | 2010-08-27 | 2011-01-19 | 电子科技大学 | Electronic tag antenna |
| CN103270511A (en) * | 2010-09-15 | 2013-08-28 | 多康公司 | Automated antenna builder and antenna repository |
| CN104485508A (en) * | 2014-12-19 | 2015-04-01 | 夏景 | Complex impedance RFID (radio frequency identification) bow-tie-shaped printing antenna |
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| CN106910988A (en) | 2017-06-30 |
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Effective date of registration: 20190906 Address after: 610015 China (Sichuan) Free Trade Pilot Zone Applicant after: Sichuan Huada Hengxin Technology Co., Ltd. Address before: 201203, Shanghai, Pudong New Area, Liang Xiu Road, No. 112, block Y1, Room 305, room three Applicant before: HUADA SEMICONDUCTOR CO., LTD. |
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Address after: Floor 17, unit 2, building 6, 171 hele 2nd Street, Chengdu hi tech Zone, Chengdu pilot Free Trade Zone, Sichuan 610212 Patentee after: Huada Hengxin Technology Co.,Ltd. Address before: 610015 China (Sichuan) pilot Free Trade Zone 1-3 / F, block B, building 4, 200 Tianfu 5th Street, Chengdu hi tech Zone Patentee before: Sichuan Huada Hengxin Technology Co.,Ltd. |