CN113193341A - Positioning antenna and design method thereof - Google Patents
Positioning antenna and design method thereof Download PDFInfo
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- CN113193341A CN113193341A CN202110414544.2A CN202110414544A CN113193341A CN 113193341 A CN113193341 A CN 113193341A CN 202110414544 A CN202110414544 A CN 202110414544A CN 113193341 A CN113193341 A CN 113193341A
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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Abstract
The positioning antenna comprises a radiating oscillator (1) made of a metal piece, a substrate (2) and a signal chip arranged on the substrate (2); an antenna signal feed port (3) and an antenna loop ground feed port (4) are arranged on the substrate (2), and two feed points (5) are correspondingly arranged on the radiation oscillator (1); the radiation oscillator (1) is respectively connected with the feed port (3) and the ground feed port (4) through two feed points (5) arranged on the radiation oscillator, and the feed port (3) is connected with the signal chip; the feed port (3) is arranged at the eccentric position of the substrate (2); the middle feeder line of the radiation oscillator (1) is bent, and the width of the radiation tail feeder line of the radiation oscillator (1) is larger than that of the radiation middle feeder line. The antenna has the effects of reducing the power consumption of a small-size positioning antenna and improving the resonant frequency adjusting efficiency.
Description
Technical Field
The present application relates to the field of positioning antennas, and in particular, to a positioning antenna and a design method thereof.
Background
Since a positioning antenna such as a GPS is used as an item of the U.S. military in 1958, through development of more than seventy years, the positioning antenna has become a satellite navigation system with all-round, all-weather, all-time and high-precision, and can provide navigation information such as low-cost and high-precision three-dimensional position, speed and precise timing for global users. The positioning antenna, such as a GPS antenna, is the most important device at the end user side, and plays a role in receiving satellite signals, and the performance of the GPS antenna directly determines the use experience of the GPS terminal device. GPS antennas have been made smaller and smaller over decades of development.
At present, a small positioning antenna is prepared based on a substrate with high dielectric constant such as ceramic, for example, a GPS ceramic antenna, when the positioning antenna is prepared, a ceramic substrate needs to be sintered and molded first, then a silver layer is plated on the surface of the substrate, the frequency modulation of the ceramic antenna is realized by changing the shape of the silver layer on the surface of the ceramic, and an electric drill is usually used; the positioning antenna has a large dielectric constant, so that the positioning antenna is sensitive to frequency change caused by the change of the shape of the silver coating. And if the frequency of the ceramic antenna is tested to be not in accordance with the requirement, continuously cutting the silver coating by using an electric drill to adjust the resonant frequency of the antenna.
Aiming at the related technologies, the inventor thinks that the existing small-volume positioning antenna has the problems of larger power consumption, lower resonant frequency adjusting efficiency, complex antenna preparation process and lower production efficiency.
Disclosure of Invention
In order to solve the problems existing in the background technology, particularly the problems of large power consumption and low resonant frequency adjusting efficiency of the existing small-size positioning antenna, the application provides a positioning antenna and a design method thereof.
In a first aspect, the present application provides a positioning antenna, which adopts the following technical solutions:
a positioning antenna comprises a radiating oscillator made of metal pieces, a substrate and a signal chip arranged on the substrate; an antenna signal feed port and an antenna loop ground feed port are arranged on the substrate, and two feed points are correspondingly arranged on the radiation oscillator; the radiation oscillator is respectively connected with the feed port and the ground feed port through two feed points arranged on the radiation oscillator, and the feed port is connected with the signal chip; the feed port is arranged at the eccentric position of the substrate; the middle feeder line of the radiation oscillator is bent, and the width of the radiation tail feeder line of the radiation oscillator is larger than that of the radiation middle feeder line.
By adopting the technical scheme, the novel radiation oscillator structure (replacing the radiation oscillator formed by the existing ceramic medium and silver-plated layer) is designed, the radiation oscillator is made of metal parts, two feed points are arranged on the radiation oscillator, an antenna signal feed port and an antenna loop ground feed port are arranged on the substrate, and the radiation oscillator is connected with the antenna signal feed port and the antenna loop ground feed port on the substrate through the two feed points; the antenna signal feed port is connected with the signal chip; the antenna signal feed port is arranged at the eccentric position of the substrate; the middle feeder line of the radiation oscillator is bent, the width of the radiation tail feeder line of the radiation oscillator is larger than that of the radiation middle feeder line, the radiation oscillator structure realizes a high-gain positioning antenna in a narrow space (can meet the requirements of circular polarization and resonant frequency of the antenna, has a better signal radiation effect and a smaller antenna volume) through the ingenious routing (the middle feeder of the radiation oscillator is bent, and the width of the radiation tail feeder of the radiation oscillator is larger than that of the radiation middle feeder) and the unique feed structure (the antenna signal feed port is arranged at the eccentric position of the substrate), the antenna can be conveniently and simply subjected to frequency modulation in the later period (by adopting the radiation oscillator structure, the resonant frequency can be adjusted through the length of the feed line of the radiation oscillator), so that the antenna can be suitable for various environments and different positioning systems; and after the length of the feeder line is determined, the resonant frequency can be determined, the metal piece can be adopted to manufacture the radiating oscillators in batch subsequently, frequency modulation processing of each antenna is not needed, and the frequency modulation efficiency of the antenna is greatly improved. In addition, the radiation oscillator manufactured by the metal part is adopted, the substrate is air, and compared with the existing antenna using the high dielectric constant substrate (generally ceramic), the loss of the radiation oscillator is greatly reduced.
Preferably, a groove is arranged between the antenna signal feed port on the substrate and the antenna loop ground feed port, and the length, width and depth of the groove are determined by the bandwidth of the antenna. Through setting up this recess, follow-up effective bandwidth that can adjust the location antenna through the length, width and the degree of depth of recess has made things convenient for the regulation of location antenna effective bandwidth greatly.
Preferably, the radiation oscillator includes a radiator and two X feed lines connected to the radiator and perpendicular to the substrate, and the two feed points are respectively disposed on the two X feed lines.
Through adopting above technical scheme, set up two X feeders to can realize adjusting the effective bandwidth of antenna through the distance of adjusting two X feeders, it is convenient, high-efficient.
Preferably, the radiator is in an inverted 'S' shape and is symmetrical based on a central line; the central line is a line which is parallel to the two X feeder lines and has the same distance with the two X feeder lines, and the central line and the two X feeder lines are respectively on the same straight line with the intersection point of the substrate and the intersection point of the radiator.
By adopting the technical scheme, the radiator is symmetrical based on the central line, so that the balance of the receiving performance strength is realized, particularly, the radiator is in an inverted S shape, the anti-interference performance of the antenna is better, and the consistency of the radiation of the antenna in all directions is facilitated.
Preferably, the width and height of the radiator are both 117mm, the radiator comprises an a feeder line, a b feeder line, a c feeder line, a d feeder line, an e feeder line, an f feeder line and a g feeder line which are connected in sequence, the a feeder line and the c feeder line are respectively perpendicular to the b feeder line, the d feeder line is respectively perpendicular to the c feeder line and the e feeder line, the f feeder line is respectively perpendicular to the e feeder line and the g feeder line, the width of the a feeder line and the width of the g feeder line are 13.5mm, the width of the X feeder line is 6.75mm, the width of the feed point is 3.6mm, the height of the feed point is 4.5mm, the distance from one feed point to the e feeder line is 41.63mm, the distance from the other feed point to the e feeder line is 68.63mm, the width of the b feeder line, the c feeder line, the d feeder line, the e feeder line and the f feeder line are 7.2mm, and the distance from the e feeder line to the g feeder line is 106.2 mm.
By adopting the technical scheme, the anti-interference performance of the antenna is best, and the consistency of the radiation directions of the antenna is also best.
Preferably, the two X feed lines have different lengths.
By adopting the technical scheme, the antenna structure is more stable and the consistency is better.
The lengths of the two X feeders are determined according to the effective bandwidth of the positioning antenna.
By adopting the technical scheme, the effective bandwidth of the positioning antenna can be adjusted quickly and accurately.
Preferably, the feed port is connected with the signal chip through a microstrip line; the impedance design of the microstrip line replaces the traditional elements such as capacitors and resistors to carry out impedance matching, so that the cost is saved, and the probability of antenna failure is reduced.
More preferably, the microstrip line is C-shaped and specifically includes an AB edge, a CD edge and an EF edge, the CD edge is respectively and vertically connected with the AB edge and the EF edge, the AB edge is connected with the feed port, and the EF edge is connected with the signal chip; the width of the microstrip line is 0.2 mm; the length of the AB side is 6.86mm, the length of the CD side is 6.87mm, and the length of the EF side is 1.78 mm.
By adopting the technical scheme, the microstrip line can be adopted for impedance matching, the microstrip line can be designed to 50 ohms as far as possible by setting the length, the width, the interval and the like of the microstrip line, and the requirement of antenna setting is met.
In a second aspect, the present application provides a method for designing a positioning antenna, which adopts the following technical solutions:
the design method of the positioning antenna comprises the following steps:
designing a routing of a radiation oscillator, wherein a middle feeder is bent, and the width of a radiation tail feeder of the radiation oscillator is larger than that of the radiation middle feeder;
manufacturing the wiring of the radiation oscillator by using a metal piece, and then performing punch forming;
and connecting the punched and formed radiation oscillator with the substrate and the signal chip on the substrate to obtain the positioning antenna.
Through adopting above technical scheme, at first design the line of walking of radiating element, then utilize the metal part preparation radiating element walk the line, then stamping forming to can realize batch production, then be connected the radiating element of batch production with signal chip on base plate and the base plate, obtain the location antenna, for prior art, the production efficiency of location antenna has been improved greatly, and the location antenna that produces need not to carry out frequency modulation one by one again (can unify according to the length of radiating element and confirm resonant frequency), thereby the efficiency of antenna frequency modulation has been improved greatly.
Preferably, the routing for designing the radiating element further includes: the length of the whole feeder line of the radiation oscillator is determined according to the resonant frequency of the positioning antenna (namely the resonant frequency of the positioning antenna needs to be adjusted according to the length of the whole feeder line of the radiation oscillator).
Preferably, the routing for designing the radiating element further includes: the length of the X-feed is adjusted according to the effective bandwidth of the positioning antenna.
By adopting the technical scheme, the effective bandwidth of the positioning antenna can be quickly adjusted by adjusting the length of the X feeder line.
Preferably, the method further comprises the following steps: and a groove is arranged between the antenna signal feed port on the substrate and the antenna loop ground feed port, and the effective bandwidth of the antenna is adjusted through the length, the width and the depth of the groove.
Through adopting above technical scheme to can realize quick regulation positioning antenna's effective bandwidth through the length, width and the degree of depth of adjusting the recess on the base plate.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the novel radiation oscillator structure is designed (the radiation oscillator formed by replacing the existing ceramic medium and silver-plated layer is replaced), the radiation oscillator is made of metal parts, two feed points are arranged on the radiation oscillator, an antenna signal feed port and an antenna loop ground feed port are arranged on a substrate, and the radiation oscillator is connected with the antenna signal feed port and the antenna loop ground feed port on the substrate through the two feed points; the antenna signal feed port is connected with the signal chip; the antenna signal feed port is arranged at the eccentric position of the substrate; the middle feeder line of the radiation oscillator is bent, the width of the radiation tail feeder line of the radiation oscillator is larger than that of the radiation middle feeder line, the radiation oscillator structure realizes a high-gain positioning antenna in a narrow space (can meet the requirements of circular polarization and resonant frequency of the antenna, has a better signal radiation effect and a smaller antenna volume) through the ingenious routing (the middle feeder of the radiation oscillator is bent, and the width of the radiation tail feeder of the radiation oscillator is larger than that of the radiation middle feeder) and the unique feed structure (the antenna signal feed port is arranged at the eccentric position of the substrate), the antenna can be conveniently and simply subjected to frequency modulation in the later period (by adopting the radiation oscillator structure, the resonant frequency can be adjusted through the length of the feed line of the radiation oscillator), so that the antenna can be suitable for various environments and different positioning systems; and after the length of the feeder line is determined, the resonant frequency can be determined, the metal piece can be adopted to manufacture the radiating oscillators in batch subsequently, frequency modulation processing of each antenna is not needed, and the frequency modulation efficiency of the antenna is greatly improved. In addition, the radiation oscillator manufactured by the metal part is adopted, the substrate is air, and compared with the existing antenna using the high dielectric constant substrate (generally ceramic), the loss of the radiation oscillator is greatly reduced.
2. This application antenna signal feed port and antenna circuit on the base plate are presented and are fed and be equipped with the recess between the ground port, the bandwidth that length, width and the degree of depth of recess pass through the antenna is confirmed. Through setting up this recess, follow-up effective bandwidth that can adjust the location antenna through the length, width and the degree of depth of recess has made things convenient for the regulation of location antenna effective bandwidth greatly.
3. The radiation oscillator comprises a radiating body and two X feeder lines which are connected with the radiating body and perpendicular to a substrate, wherein two feed points are respectively arranged on the two X feeder lines. Through adopting above technical scheme, set up two X feeders to can realize adjusting the effective bandwidth of antenna through the distance of adjusting two X feeders, it is convenient, high-efficient.
The technical difficulty of the application is reflected in that: how to make a small-volume positioning antenna of a new structure normally usable, and how to determine the frequency modulation mode of the antenna of the structure and the mode of adjusting the effective bandwidth. The inventor finds that the positioning antenna can be normally used as long as the positioning antenna meets the resonant frequency requirement and the circular polarization requirement, for the antenna, the resonant frequency can be adjusted through the length of the feed line of the radiation oscillator, and the circular polarization requirement can be met by arranging the feed port of the antenna signal at the eccentric position of the substrate and adopting the wiring mode in the application, namely 'the feed line at the middle part of the radiation oscillator is bent, and the width of the feed line at the radiation tail part of the radiation oscillator is greater than that of the feed line at the radiation middle part', so that the antenna can be normally used; in addition, the inventors have found through research that the effective bandwidth of the antenna can be adjusted by the following 2 conditions: (1) adjusting the effective bandwidth of the positioning antenna according to the length of the X feeder; (2) the effective bandwidth of the positioning antenna is adjusted according to the length, the width and the depth of the groove on the substrate.
Drawings
Fig. 1 to 3 are schematic structural views of a conventional ceramic antenna.
Fig. 4 is a schematic structural diagram of an antenna according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of an antenna radiating element according to an embodiment of the present application.
Fig. 6-7 are schematic structural diagrams of an antenna substrate according to an embodiment of the present application.
Fig. 8 is a VSWR graph of an antenna in an embodiment of the present application.
Fig. 9 is a graph of S11 for an antenna in an embodiment of the present application.
Fig. 10 is a 3D gain diagram of an antenna in an embodiment of the present application.
Fig. 11 is an XY plane pattern of an antenna in an embodiment of the present application.
Fig. 12 is a YZ plane pattern of an antenna in an embodiment of the present application.
Fig. 13 is an XZ plane pattern of an antenna in an embodiment of the present application.
Fig. 14 is a schematic structural diagram illustrating an antenna signal feed path and a signal chip connected by a microstrip line according to an embodiment of the present application.
Fig. 15 is a schematic structural diagram of a radiating element in an embodiment of the present application.
Reference numerals: 1. the antenna comprises a radiation oscillator, 2, a substrate, 3, a feed port, 4, a ground feed port, 5, a feed point, 6, a groove, 7, a radiator, 8 and an X feed line.
Detailed Description
The present application is described in further detail below with reference to figures 1-15.
The conventional GPS ceramic antenna has a small volume as shown in fig. 1 to 3, but the small volume is based on a high-dielectric-constant substrate (such as ceramic), and the high-dielectric-constant substrate always causes various problems, such as large loss (due to the substrate is made of high-dielectric-constant ceramic, the substrate is air in the present application), complex processing process, difficulty in frequency modulation after environmental interference in the later period, and low frequency modulation efficiency. Specifically, during preparation, a ceramic substrate is sintered and molded, a silver layer is plated on the surface of the substrate, the frequency modulation of the ceramic antenna is realized by changing the shape of the silver layer on the ceramic surface, and an electric drill is usually used; the positioning antenna has a large dielectric constant, so that the positioning antenna is sensitive to frequency change caused by the change of the shape of the silver coating. And if the frequency of the ceramic antenna is tested to be not in accordance with the requirement, continuously cutting the silver coating by using an electric drill to adjust the resonant frequency of the antenna.
The embodiment of the application discloses a positioning antenna. Referring to fig. 4, a positioning antenna (for example, another positioning antenna such as a GPS antenna or DB) includes a radiating element 1 made of a metal member (for example, a steel sheet, an FPC, an LDS (any metal element), a substrate 2, and a signal chip provided on the substrate 2; an antenna signal feed port 3 and an antenna loop ground feed port 4 are arranged on the substrate 2, and two feed points 5 are correspondingly arranged on the radiation oscillator 1; the radiation oscillator 1 is respectively connected with the feed port 3 and the ground port 4 through two feed points 5 arranged on the radiation oscillator, and the feed port 3 is connected with the signal chip; the feed port 3 is arranged at the eccentric position of the substrate 2; the middle feeder line of the radiation oscillator 1 is bent, and the width of the radiation tail feeder line of the radiation oscillator 1 is larger than that of the radiation middle feeder line.
The positioning antenna described above is only required to meet the requirements of resonant frequency (the above antenna structure can adjust the resonant frequency by the length of the feed line of the radiation oscillator 1) and circular polarization (the antenna signal feed port 3 is located at the eccentric position of the substrate 2, and the routing manner in the present application is adopted — the middle feed line of the radiation oscillator 1 is curved, and the width of the feed line at the tail of the radiation oscillator 1 is greater than that of the feed line at the middle of the radiation), and the specific shape of the radiation oscillator 1 can be changed.
In specific implementation, for example, an approximate physical length of a half-wave radiating element 1 feed line of a conventional positioning antenna (that is, a corresponding λ value is obtained according to a resonant frequency of a current antenna), for example, about 95MM, may be obtained according to λ = C ⁄ F, and then an accurate resonant frequency may be adjusted by specifically adjusting the length of the feed line of the radiating element 1, and at the same time, a central feed line of the radiating element 1 with insignificant radiation effect may be bent, and a width of a radiation tail feed line of the radiating element 1 is set to be greater than that of the radiation central feed line, so that an overall size of the antenna is controlled within 27MM, for example.
In the antenna structure of the present application, the inventor has conducted an effect test, and as can be seen from the electric field distribution diagram of the surface of the radiating element 1 shown in fig. 13: the radiation of antenna mainly concentrates on the afterbody of oscillator, consequently, in this application, is greater than the radiation middle part feeder through the width that sets up the radiation afterbody feeder of radiation oscillator 1 to can further promote the radiation effect of antenna.
The inventors also performed a series of tests on the antenna structure in the present application, as follows:
the inventor tests the Standing-Wave Ratio (the Standing-Wave Ratio is called Voltage Standing-Wave Ratio, also called VSWR and SWR, the abbreviation of English Voltage Standard Wave Ratio, the Ratio of the Voltage of the antinode of the Standing Wave to the Voltage of the Wave trough, also called Standing-Wave coefficient and Standing-Wave Ratio) of the antenna, when the Standing-Wave Ratio is equal to 1, the frequency point required by the wiring matching of the antenna radiation oscillator 1 is shown, at the moment, all high-frequency energy is radiated by the antenna, and no energy reflection loss exists; when the standing-wave ratio is infinite, the total reflection is shown, and the energy is not radiated at all. As can be seen from fig. 8, the standing-wave ratio of the antenna structure of the present application is close to 1, and therefore, the antenna radiation efficiency is high and the radiation effect is good.
In addition, the inventor also tests the loss and impedance characteristics of the antenna, and the loss and impedance characteristics are measured by return loss characteristics. S11 represents the return loss characteristic, and the dB value and the impedance characteristic of the loss of the antenna can be generally determined by the network analyzer through the index, and the radiation efficiency of the antenna is further determined to be poor, and the larger the S11 value is, the larger the energy reflected by the antenna itself is, the worse the radiation efficiency of the antenna is. According to the illustration in fig. 9, the antenna of the present application has a small S11 value, which indicates that the radiation efficiency of the antenna is very good.
In addition, the inventor also tests the directional diagram of the antenna with the structure of the application. An antenna directional pattern, that is, a pattern for representing the directivity of an antenna, refers to a pattern in which the relative field strength (normalized mode value) of a radiation field changes with the direction at a certain distance from the antenna, that is, the relationship between the relative value of the radiation field of the antenna and the spatial direction under the condition of the same distance R in a far zone is usually represented by two mutually perpendicular plane directional patterns in the maximum radiation direction of the antenna. The antenna pattern is an important graph for measuring the performance of the antenna, and various parameters of the antenna can be observed from the antenna pattern. As can be seen from fig. 10-13, the index of the positioning antenna of the present application (i.e., including the radiating element 1 made of a metal component (such as a steel sheet, an FPC, an LDS, etc. (any metal element is used)), the substrate 2, and the signal chip disposed on the substrate 2, the substrate 2 is provided with the antenna signal feeding port 3 and the antenna loop ground feeding port 4, the radiating element 1 is correspondingly provided with two feeding points 5, the radiating element 1 is connected with the feeding port 3 and the ground feeding port 4 through the two feeding points 5 disposed thereon, the feeding port 3 is connected with the signal chip, the feeding port 3 is disposed at an eccentric position of the substrate 2, the middle feeder of the radiating element 1 is bent, and the width of the tail of the radiating feeder of the radiating element 1 is greater than that of the radiating middle feeder), meets the requirement.
Optionally, a groove 6 is disposed between the antenna signal feed port 3 on the substrate 2 and the antenna loop ground feed port 4, and a length, a width, and a depth of the groove 6 are determined by a bandwidth of the antenna.
Optionally, the radiation oscillator 1 includes a radiator 7 and two X feeder lines 8 connected to the radiator 7 and perpendicular to the substrate 2, and the two feeder points 5 are respectively disposed on the two X feeder lines 8.
The radiator 7 may be planar or three-dimensional.
In the present application, as shown in the schematic diagrams of the antenna substrate 2 in fig. 6, fig. 7 and fig. 15, it can be seen that the feeding port 3 connected to the radiation element 1 on the substrate 2 is disconnected from the reflection plate on the substrate 2, and this structure can effectively avoid the coupling between the antenna radiation element 1 and the reflection plate, and reduce the influence of the noise wave generated by the coupling on the antenna. The antenna loop ground feed port 4 is communicated with a net on the substrate, and the net is a reflecting surface of the antenna substrate, namely a reflecting ground layer of the antenna.
Alternatively, as shown in fig. 5 and 15, the radiator 7 is in an inverted "S" shape and is symmetrical based on a central line; the central line is a line which has equal distance and is parallel to the two X feeder lines 8, and the intersection points of the central line and the two X feeder lines 8 with the substrate 2 and the intersection points of the central line and the two X feeder lines 8 with the radiator 7 are on the same straight line.
Optionally, as shown in fig. 15, the width and height of the radiator 7 are both 117mm, the radiator 7 includes an a feeder, a b feeder, a c feeder, a d feeder, an e feeder, an f feeder, and a g feeder which are connected in sequence, the a feeder and the c feeder are perpendicular to the b feeder, the d feeder is perpendicular to the c feeder and the e feeder, the f feeder is perpendicular to the e feeder and the g feeder, the a feeder and the g feeder have widths of 13.5mm, the X feeder 8 has a width of 6.75mm, the feed point 5 has a width of 3.6mm and a height of 4.5mm, one of the feed points 5 is 41.63mm from the e feeder, the other feed point 5 is 68.63mm from the e feeder, the widths of the b feeder, the c feeder, the d feeder, the e feeder, and the f feeder are 7.2mm, and the distance from the e feeder to the g is 106.2 mm.
Optionally, the two X feed lines 8 have different lengths.
According to fig. 5 and fig. 15, the lengths of the two X feed lines 8 disposed on the radiating element 1 of the positioning antenna in the present application are different, so that the bandwidth of the antenna can be increased, thereby avoiding frequency offset caused by errors during debugging.
Optionally, the lengths of the two X feeders 8 are determined according to the effective bandwidth of the positioning antenna.
Optionally, as shown in fig. 14, the feed port 3 is connected to the signal chip through a microstrip line; the microstrip line is C-shaped and specifically comprises an AB edge, a CD edge and an EF edge, wherein the CD edge is respectively and vertically connected with the AB edge and the EF edge, the AB edge is connected with the feed port 3, and the EF edge is connected with the signal chip; the width of the microstrip line is 0.2 mm; the length of the AB side is 6.86mm, the length of the CD side is 6.87mm, the length of the EF side is 1.78mm, and the length and width of the substrate 2 are both 26.5 mm.
The embodiment of the application also discloses a design method of the positioning antenna. Referring to fig. 2, the method for designing the positioning antenna includes the following steps:
designing a routing of the radiation oscillator 1, wherein a middle feeder is bent, and the width of a radiation tail feeder of the radiation oscillator 1 is larger than that of the radiation middle feeder;
manufacturing the wiring of the radiation oscillator 1 by using a metal piece, and then performing punch forming;
and connecting the punched and formed radiation oscillator 1 with the substrate 2 and the signal chip on the substrate 2 to obtain the positioning antenna.
Optionally, the designing of the routing of the radiating element 1 further includes: the overall feed line length of the radiating element 1 is determined according to the resonant frequency of the positioning antenna (i.e. the resonant frequency of the positioning antenna needs to be adjusted according to the overall feed line length of the radiating element 1; in specific implementation, for example, the approximate physical length of a half-wave radiating element feed line of a conventional positioning antenna, such as about 95MM, can be obtained according to λ = c ⁄ F, and then the accurate resonant frequency is adjusted by specifically adjusting the length of the radiating element feed line).
Optionally, the designing of the routing of the radiating element 1 further includes: the length of the X-feed 8 is adjusted according to the effective bandwidth of the positioning antenna.
Optionally, the method further includes: a groove 6 is arranged between the antenna signal feed port 3 and the antenna loop ground feed port 4 on the substrate 2, and the effective bandwidth of the antenna is adjusted through the length, width and depth of the groove 6.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made in the method, structure and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A positioning antenna, characterized by: the device comprises a radiation oscillator (1) made of metal pieces, a substrate (2) and a signal chip arranged on the substrate (2); an antenna signal feed port (3) and an antenna loop ground feed port (4) are arranged on the substrate (2), and two feed points (5) are correspondingly arranged on the radiation oscillator (1); the radiation oscillator (1) is respectively connected with the feed port (3) and the ground feed port (4) through two feed points (5) arranged on the radiation oscillator, and the feed port (3) is connected with the signal chip; the feed port (3) is arranged at the eccentric position of the substrate (2); the middle feeder line of the radiation oscillator (1) is bent, and the width of the radiation tail feeder line of the radiation oscillator (1) is larger than that of the radiation middle feeder line.
2. The positioning antenna of claim 1, wherein: a groove (6) is arranged between the antenna signal feed port (3) on the substrate (2) and the antenna loop ground feed port (4), and the length, the width and the depth of the groove (6) are determined by the bandwidth of the antenna.
3. The positioning antenna of claim 1, wherein: the radiating oscillator (1) comprises a radiating body (7) and two X feeder lines (8) which are connected with the radiating body (7) and perpendicular to the substrate (2), and the two feed points (5) are respectively arranged on the two X feeder lines (8).
4. The positioning antenna of claim 3, wherein: the radiator (7) is in an inverted S shape and is symmetrical based on a central line; the central line is a line which is parallel to the two X feeder lines (8) at equal distance, and the intersection point of the central line and the two X feeder lines (8) with the substrate (2) and the intersection point of the central line and the radiator (7) are on the same straight line.
5. The positioning antenna of claim 3, wherein: the two X feeder lines (8) have different lengths; the lengths of the two X feeder lines (8) are determined according to the effective bandwidth of the positioning antenna.
6. The positioning antenna of claim 1, wherein: the feed port (3) is connected with the signal chip through a microstrip line; the microstrip line is C-shaped and specifically comprises an AB edge, a CD edge and an EF edge, wherein the CD edge is respectively and vertically connected with the AB edge and the EF edge, the AB edge is connected with the feed port (3), and the EF edge is connected with the signal chip; the width of the microstrip line is 0.2 mm; the length of the AB side is 6.86mm, the length of the CD side is 6.87mm, and the length of the EF side is 1.78 mm.
7. A method for designing a positioning antenna according to any of claims 1-6, characterized in that it comprises the following steps:
designing a routing of the radiation oscillator (1), namely a middle feeder is bent, and the width of a radiation tail feeder of the radiation oscillator (1) is larger than that of the radiation middle feeder;
manufacturing the wiring of the radiation oscillator (1) by using a metal piece, and then performing punch forming;
and connecting the punch-formed radiation oscillator (1) with the substrate (2) and the signal chip on the substrate (2) to obtain the positioning antenna.
8. The design method of the positioning antenna according to claim 7, wherein the designing the routing of the radiating element (1) further comprises: the overall feed length of the radiating element (1) is determined from the resonant frequency of the positioning antenna.
9. The design method of the positioning antenna according to claim 7, wherein the designing the routing of the radiating element (1) further comprises: the length of the X-feeder (8) is adjusted according to the effective bandwidth of the positioning antenna.
10. The method for designing a positioning antenna according to claim 7, further comprising: a groove (6) is arranged between an antenna signal feed port (3) and an antenna loop ground feed port (4) on the substrate (2), and the effective bandwidth of the antenna is adjusted through the length, the width and the depth of the groove (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110414544.2A CN113193341A (en) | 2021-04-16 | 2021-04-16 | Positioning antenna and design method thereof |
| CN202111322708.5A CN113937478B (en) | 2021-04-16 | 2021-11-09 | Positioning antenna and design method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110414544.2A CN113193341A (en) | 2021-04-16 | 2021-04-16 | Positioning antenna and design method thereof |
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| CN202111322708.5A Active CN113937478B (en) | 2021-04-16 | 2021-11-09 | Positioning antenna and design method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113938139A (en) * | 2021-09-30 | 2022-01-14 | 加特兰微电子科技(上海)有限公司 | Signal receiving, signal transmitting chain, radio device and feeder line setting method |
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| US5070340A (en) * | 1989-07-06 | 1991-12-03 | Ball Corporation | Broadband microstrip-fed antenna |
| KR100367353B1 (en) * | 2000-11-22 | 2003-01-09 | 윤현보 | Stacked S-type multi-band internal antenna for mobile phone |
| FI120607B (en) * | 2003-10-31 | 2009-12-15 | Pulse Finland Oy | The multi-band planar antenna |
| US7330156B2 (en) * | 2004-08-20 | 2008-02-12 | Nokia Corporation | Antenna isolation using grounded microwave elements |
| US7663555B2 (en) * | 2004-10-15 | 2010-02-16 | Sky Cross Inc. | Method and apparatus for adaptively controlling antenna parameters to enhance efficiency and maintain antenna size compactness |
| CN101043101A (en) * | 2006-03-20 | 2007-09-26 | 松下电器产业株式会社 | Single feeder built-in multi-frequency band antenna for mobile communication terminal |
| TW200905972A (en) * | 2007-07-31 | 2009-02-01 | Wistron Neweb Corp | Antenna structure and wireless communication appratus thereof |
| FI20095085A (en) * | 2009-01-30 | 2010-07-31 | Pulse Finland Oy | Multi-resonant antenna |
| CN201503913U (en) * | 2009-06-04 | 2010-06-09 | 宏霸数码科技（北京）有限公司 | RFID dual-folded element antenna |
| CN106785320A (en) * | 2015-12-22 | 2017-05-31 | 中国电子科技集团公司第二十研究所 | A kind of GNSS occultation positioning antenna of phase center stabilization |
| CN208637612U (en) * | 2018-07-27 | 2019-03-22 | 深圳市玛雅通讯设备有限公司 | A kind of active Beidou, GPS and tri- mould of GNOLASS position antenna |
| CN111430888B (en) * | 2019-01-10 | 2022-08-26 | 青岛海信移动通信技术股份有限公司 | Antenna and mobile terminal |
| CN211743403U (en) * | 2020-05-28 | 2020-10-23 | 广东小天才科技有限公司 | Circularly polarized positioning antenna and wearable equipment |
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2021
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| CN113938139A (en) * | 2021-09-30 | 2022-01-14 | 加特兰微电子科技(上海)有限公司 | Signal receiving, signal transmitting chain, radio device and feeder line setting method |
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| CN113937478B (en) | 2023-11-21 |
| CN113937478A (en) | 2022-01-14 |
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