CN114421150A - Medium-loaded silver paste-free antenna for navigation positioning and design and preparation method thereof - Google Patents
Medium-loaded silver paste-free antenna for navigation positioning and design and preparation method thereof Download PDFInfo
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 39
- 239000004332 silver Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 84
- 239000002184 metal Substances 0.000 claims abstract description 84
- 239000000758 substrate Substances 0.000 claims abstract description 25
- 230000005855 radiation Effects 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 14
- 239000000919 ceramic Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 230000010287 polarization Effects 0.000 claims description 9
- 238000005530 etching Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 238000004088 simulation Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/106—Microstrip slot antennas
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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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0428—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave
Abstract
The invention discloses a dielectric-loaded silver paste-free antenna for navigation and positioning and a design and preparation method thereof. The dielectric loading silver paste-free antenna comprises a microstrip slot antenna and a dielectric block. The microstrip slot antenna comprises a dielectric substrate, and metal patches and metal conduction bands which are respectively printed on the upper surface and the lower surface of the dielectric substrate. The metal patch is provided with an annular gap coupled with the metal conduction band and two pairs of rectangular gaps which are symmetrically arranged by taking the center of the annular gap as a symmetrical point. Two rectangular gaps in each pair of rectangular gaps are symmetrically arranged by taking the center of the annular gap as a symmetrical point, one end of each rectangular gap is communicated with the outer edge of the annular gap, and the other end of each rectangular gap radiates outwards. The antenna has the characteristics of simple and light structure, excellent performance, low profile, low cost, wide axial ratio, low return loss, wide absolute bandwidth, stable radiation pattern and the like, and is suitable for the positioning function of a satellite navigation system.
Description
Technical Field
The invention relates to an antenna, a design method of the antenna and a preparation method of the antenna in the technical field of antennas, in particular to a dielectric-loaded silver paste-free antenna for navigation and positioning, a design method of the dielectric-loaded silver paste-free antenna and a preparation method of the dielectric-loaded silver paste-free antenna.
Background
With the popularization of satellite navigation systems, positioning is an important service of satellite navigation services, and has important applications in the fields of private location services, meteorological application, road traffic, emergency rescue, aviation, marine water transportation and the like. The corresponding navigation positioning antenna has a large market demand.
As a traditional antenna type for satellite positioning, a ceramic microstrip antenna is commonly used for designing satellite positioning antennas of various specifications due to its advantages of small size, easy mass production, and the like. However, the conventional manufacturing method of the common ceramic microstrip antenna is to print a silver layer on a loading medium, so that the cost is increased and the processing and debugging become complicated, which leads to high price of the antenna.
For example, the application publication number is CN111864369A, entitled "a satellite positioning GPS, beidou ceramic passive antenna", the invention discloses a satellite positioning GPS, beidou ceramic passive antenna, which is composed of a ceramic plate and a radio frequency connecting plate, the ceramic plate is a radiation structure, the radio frequency connecting plate increases the gain of the antenna, so that the antenna normally works in the BD3 generation positioning and GPS positioning frequency band. The antenna is light and small, the transverse dimension is only 25mm by 25mm, the structure is complex, a silver layer needs to be printed, the material cost is high, and the performance deviation caused by the processing error of a product needs to be eliminated by manual debugging due to the fact that the impedance bandwidth and the axial ratio bandwidth are narrow.
Disclosure of Invention
In order to solve the technical problem that the performance deviation caused by the product processing error is required to be eliminated through manual debugging of the existing antenna, the invention provides a dielectric-loaded silver paste-free antenna for navigation and positioning, a design method of the dielectric-loaded silver paste-free antenna and a preparation method of the dielectric-loaded silver paste-free antenna.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dielectric-loaded, silver-paste-free antenna for navigational positioning, comprising:
the microstrip slot antenna comprises a dielectric substrate, and a metal patch and a metal conduction band which are respectively printed on the upper surface and the lower surface of the dielectric substrate, wherein the metal conduction band is used as a feed structure of the microstrip slot antenna, and the metal patch is used as a radiation structure of the microstrip slot antenna; and
the dielectric block is arranged on the surface of the dielectric substrate with the metal patch and is positioned at the central position of the metal patch;
wherein, the metal paster has:
an annular gap coupled to the metal conduction band;
the two rectangular gaps in each pair of rectangular gaps are symmetrically arranged by taking the center of the annular gap as a symmetrical point, and the two pairs of rectangular gaps are also symmetrically arranged by taking the center of the annular gap as a symmetrical point; and one end of each rectangular gap is communicated with the outer edge of the annular gap, and the other opposite end of each rectangular gap radiates outwards.
According to the invention, through the design of the microstrip slot antenna, two rectangular slots in each pair of rectangular slots are symmetrically arranged by taking the center of the annular slot as a symmetrical point, and two pairs of rectangular slots are also symmetrically arranged by taking the center of the annular slot as a symmetrical point; one end of each rectangular slot is communicated with the outer edge of the annular slot, the other opposite end of each rectangular slot radiates outwards, and the annular slot is coupled with the metal conduction band, so that the microstrip slot antenna takes the metal conduction band as a feed structure and takes the annular slot as a radiation structure, the metal conduction band transmits the energy fed into the antenna to the annular slot, and the matching of the metal conduction band and the annular slot can be adjusted by changing the length of the metal conduction band; the working frequency of the antenna is controlled by changing the size of the circular ring gap; through adjusting the size of the rectangular gap and the included angle between the rectangular gap and the metal conduction band, perturbation can be introduced, so that the antenna generates two orthogonal modes which respectively correspond to two radiation resonance points, the phase difference of the two orthogonal modes is adjusted to 90 degrees, and the antenna has a circular polarization characteristic; therefore, the high dielectric constant medium can be directly placed on the microstrip slot antenna and directly processed and formed without manual debugging, and the technical problem that the performance deviation caused by product processing errors of the existing antenna is eliminated by manual debugging is solved.
As a further improvement of the scheme, the annular gap is oval or circular.
As a further improvement of the scheme, one end of each rectangular slit is communicated with the straight short section of the annular slit, and the other end of each rectangular slit is communicated with the arc long section.
Furthermore, the arc long section takes the center of the annular gap (121) as the center of a circle and the distance between the center of the annular gap (121) and the tail end of the straight short section as the radius.
Preferably, when the annular gap is circular, the radius of the annular gap is 15.7 mm; the width of each rectangular gap is 0.5mm, the length of each straight short section is 2.3mm, the radius of each arc long section is 15.7+ 2.3-18 mm, and the arc angle of each arc long section is 20 deg; and the included angle between the line width center of the straight short section and the line width center of the metal conduction band is 27 deg.
As a further improvement of the scheme, the length of the metal conduction band is 24mm, and the width of the metal conduction band is 2.4 mm.
As a further improvement of the scheme, the side length of the metal patch is 35 mm.
As a further improvement of the above, the dielectric substrate is made of FR4 material with a dielectric constant of 3.5 and a loss tangent of 0.002, and has a side length of 35mm and a thickness of 1 mm.
As a further improvement of the above, the dielectric constant of the dielectric block is 8-60.
Furthermore, the dielectric block is made of ceramic materials with the dielectric constant of 20 and the loss tangent of 0.00005, is in a cuboid structure, and has the length equal to 5mm and the height equal to 3 mm.
The invention also provides a design method of any dielectric loading silver paste-free antenna for navigation and positioning, which comprises the following steps:
the matching degree of the metal conduction band and the annular gap is adjusted by changing the length of the metal conduction band;
and/or
The working frequency of the microstrip slot antenna is controlled by changing the size of the annular slot;
and/or
The method comprises the steps that perturbation is introduced by adjusting the size of a rectangular slot and an included angle between the rectangular slot and a metal conduction band, so that two orthogonal modes generated by a slot antenna respectively correspond to two radiation resonance points, the phase difference of the two orthogonal modes is adjusted to 90 degrees, and the slot antenna has a circular polarization characteristic;
and/or
The Q value of the microstrip slot antenna is changed by changing the shape, the size and the dielectric constant of the dielectric block, so that the miniaturization degree and the bandwidth of the microstrip slot antenna are balanced.
The invention also provides a preparation method of any dielectric loading silver paste-free antenna for navigation and positioning, which comprises the following steps:
providing a dielectric substrate;
respectively printing a metal patch and a metal conduction band on the upper surface and the lower surface of the dielectric substrate;
etching an annular gap and two pairs of rectangular gaps at the center of the metal patch, wherein the annular gap is coupled with the metal conduction band; two rectangular gaps in each pair of rectangular gaps are symmetrically arranged by taking the center of the annular gap as a symmetrical point, and two pairs of rectangular gaps are also symmetrically arranged by taking the center of the annular gap as a symmetrical point; one end of each rectangular gap is communicated with the outer edge of the annular gap, and the other opposite end of each rectangular gap radiates outwards;
and directly placing the dielectric block on the central position of the surface of the dielectric substrate with the metal patch, and directly processing and molding.
Compared with the traditional ceramic chip microstrip antenna, the microstrip antenna has the following advantages:
1. the material cost is greatly reduced, the main cost of the traditional ceramic antenna is concentrated on the silver paste printed on the surface layer, and the silver paste is saved, so that the cost is greatly reduced.
2. The processing cost is reduced, and the high dielectric constant medium can be directly placed on the microstrip slot after the model is determined, and is directly processed and molded without manual debugging.
3. The invention has simple structure, because the navigation system is divided into four categories, namely Beidou, GPS, GLONASS and Galileo, the working frequency range has different requirements, and the antenna meeting different navigation systems can be processed and manufactured after simple adjustment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic side view of a dielectric-loaded antenna without silver paste for navigation and positioning according to embodiment 1 of the present invention;
fig. 2 is a schematic top view of the dielectric-loaded antenna of fig. 1;
FIG. 3 is a diagram illustrating simulation results of reflection coefficient S11 corresponding to the antenna loaded with silver paste-free medium in FIG. 2;
FIG. 4 is a schematic diagram of simulation results of axial ratio bandwidth corresponding to the antenna loaded with silver paste free medium in FIG. 2;
fig. 5 is a schematic diagram of the polarization gain radiation directions of the medium-loaded silver-paste-free antenna in fig. 2 corresponding to the E-plane and the H-plane at the frequency point of 1561 MHz.
Fig. 6 is a schematic flow chart of a method for manufacturing a dielectric loading silver paste-free antenna according to embodiment 2 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Referring to fig. 1, the dielectric loaded silver paste-free antenna for navigation and positioning of the present invention mainly includes two parts: microstrip slot antenna 1 and dielectric block 2. The dielectric block 2 is positioned on the upper surface of the microstrip slot antenna 1. The dielectric constant of the dielectric block 2 can be 8-60, in this embodiment, the dielectric block 2 is made of ceramic material with a dielectric constant of 20 and a loss tangent of 0.00005, and is shaped as a rectangular parallelepiped structure, and the length is equal to the width of 5mm and the height is 3 mm.
Referring to fig. 2, the microstrip slot antenna 1 includes a dielectric substrate 11, a metal patch 12 and a metal conduction band 13. In the present embodiment, the height H1 of the microstrip slot antenna 1 is 1mm, and the dielectric block 2 may be a rectangular parallelepiped, and the height H2 is preferably 3 mm.
The dielectric substrate 11 may be made of FR4 material having a dielectric constant of 3.5 and a loss tangent of 0.002, and in this embodiment, the dielectric substrate 11 has a side length of 35mm and a thickness of 1 mm.
The metal patches 12 and the metal conduction bands 13 are respectively printed on the upper surface and the lower surface of the dielectric substrate 11. The metal patch 12 has one annular slot 121 and two pairs of rectangular slots 122. The length of the metal conduction band 13 can be 24mm, and the width can be 2.4 mm; the metal patch 12 may have an edge length of 35 mm.
The annular gap 121 is coupled to the metal strip 13, and the annular gap 121 has an oval shape or a circular shape, and in this embodiment, the annular gap 121 has a circular shape. Two rectangular slits 122 in each pair of rectangular slits 122 are symmetrically disposed with the center of the annular slit 121 as a point of symmetry, and two pairs of rectangular slits 122 are also symmetrically disposed with the center of the annular slit 121 as a point of symmetry. And one end of each rectangular slit 122 communicates with the outer edge of the annular slit 121, and the opposite end of each rectangular slit 122 radiates outward.
The invention relates to a microstrip slot antenna 1, which comprises the following components: two rectangular slits 122 in each pair of rectangular slits 122 are symmetrically arranged with the center of the annular slit 121 as a symmetry point, and two pairs of rectangular slits 122 are also symmetrically arranged with the center of the annular slit 121 as a symmetry point; one end of each rectangular slot 122 is communicated with the outer edge of the annular slot 121, the opposite other end of each rectangular slot 122 radiates outwards, and the annular slot 121 is coupled with the metal conduction band 13, so that the microstrip slot antenna 1 takes the metal conduction band 13 as a feed structure, takes the annular slot 121 as a radiation structure, the metal conduction band 13 transmits the energy fed into the antenna to the annular slot 121, and the matching between the metal conduction band 13 and the circular slot can be adjusted by changing the length of the metal conduction band 13; the working frequency of the antenna is controlled by changing the size of the circular ring gap; by adjusting the size of the rectangular slot 121 and the included angle between the rectangular slot and the metal conduction band 13, perturbation can be introduced, so that the antenna generates two orthogonal modes which respectively correspond to two radiation resonance points, the phase difference of the two orthogonal modes is adjusted to 90 degrees, and the antenna has a circular polarization characteristic; therefore, the high dielectric constant medium can be directly placed on the microstrip slot antenna 1 and directly processed and formed without manual debugging, and the technical problem that the performance deviation caused by product processing errors of the existing antenna is eliminated by manual debugging is solved. The wide pass band of the excitation antenna can cover the working frequency band of the positioning of four navigation systems, the antenna has the advantages of simple and light structure, excellent performance, low profile, low cost, wide axial ratio, low return loss, wide absolute bandwidth, stable radiation pattern and the like, and is suitable for the positioning function of a satellite navigation system.
On each rectangular slit 122, one end of the communicating annular slit 121 is a straight short section, and the other end is an arc long section. The arc long section takes the center of the annular gap 121 as the center of a circle, and the distance between the center of the annular gap 121 and the tail end of the straight short section as the radius. When the annular gap 121 is circular, the radius thereof is preferably 15.7 mm; the width of each rectangular gap 122 is preferably 0.5mm, the length of the straight short section is preferably 2.3mm, the radius of the arc long section is preferably 15.7+2.3 ═ 18mm, and the arc angle of the arc long section is preferably 20 deg; the included angle between the line width center of the straight short section and the line width center of the metal conduction band 13 is preferably 27 deg.
The dielectric block 2 is a radio frequency material with a high Q value, is used for miniaturization of the antenna, and can change the Q value of the antenna by changing the shape, the size and the dielectric constant of the dielectric block 2, thereby balancing the miniaturization degree and the bandwidth of the antenna. The microstrip slot antenna 1 is reasonably designed, and the dielectric block material is properly selected, so that the antenna normally works in the frequency range of four positioning systems, and the positioning radiation index requirements are met, and the positioning function of a navigation system is realized by the antenna.
The present embodiment provides specific dimension parameters of each part of the structure of the dielectric loaded silver paste-free antenna, and further explains the dimension parameters by combining simulation results, please refer to fig. 3, 4, and 5. The dielectric block 2 is made of ceramic material with the dielectric constant of 20 and the loss tangent of 0.00005, is in a cuboid structure, and has the length equal to 5mm and the height H2 equal to 3 mm; the dielectric substrate 11 is made of FR4 material with a dielectric constant of 3.5 and a loss tangent of 0.002, and the side length Wg is 35mm, and the thickness H1 is 1 mm; the side length of the metal patch 12 is 35mm, and the radius R1 of the circular gap 121 etched in the center of the metal patch 12 is 15.7 mm; the pair of rectangular slits are rotationally symmetrical about the center of the metal patch 12, the width Ws of the pair of rectangular slits is 0.5mm, the part of each rectangular slit 122, which is communicated with the annular slit 121, is a straight short segment, the part of each rectangular slit, which is not communicated with the annular slit 121, is a segment of an arc on a circle with the center of the metal patch 12 as the center and the radius R1+ L1 being 18mm, and is called as an arc long segment of the rectangular slit 122, the included angle between the line width center of the straight short segment of one rectangular slit 122 and the line width center of the metal conduction band 13 is θ 0deg, the straight short segment length L1 is 2.3mm, and the arc angle θ 1 of the arc long segment is 20 deg; one end of the metal conduction band 13 is positioned at the edge below the dielectric substrate 11, and the length L0 is 24mm, and the width W0 is 2.4 mm.
Simulation content
1.1, a commercial electromagnetic simulation software HFSS2019 is used to perform simulation calculation on a reflection coefficient S11 curve of an antenna in the coaxial feeding case according to an embodiment of the present invention, and the result is shown in fig. 4.
1.2, using commercial electromagnetic simulation software HFSS2019 to perform simulation calculation on the axial ratio angle-dependent change curve of the antenna under the coaxial feeding condition according to the embodiment of the present invention, the result is shown in fig. 5.
1.3 using the commercial electromagnetic simulation software HFSS2019, the polarization gain patterns of the E-plane (Phi ═ 0 °) and H-plane (Phi ═ 90 °) of the antenna at 1561MHZ frequency were calculated by simulation for the present embodiment under coaxial feeding, and the results are shown in fig. 6.
2. Simulation result
Referring to fig. 3, the abscissa is frequency in GHz ranging from 1.50GHz to 1.60GHz and the ordinate is decibel value of magnitude of the S11 parameter in dB ranging from-22.5 dB to 0 dB. S11 is less than-10 dB in the frequency range of 1.554GHz-1.566GHz, and the absolute bandwidth is 12 MHz; s11 is-20 dB at the 1558MHz frequency point, so the antenna can operate normally in this band.
Referring to fig. 4, the abscissa of the graph is angle in degrees ranging from-180 degrees to 180 degrees, and the ordinate is decibel value of the amplitude of the AR parameter of axial ratio in dB ranging from 0dB to 30 dB. The AR is smaller than 3dB within the frequency range of-50 degrees to 50 degrees, the 3dB wave beam width of 100 degrees is realized, the antenna meets the performance index of Beidou 1 generation positioning, and the antenna has good right-hand circular polarization characteristics within the frequency band.
Referring to fig. 5, the antenna is shown in a 1561MHz frequency pattern. The right-hand circularly polarized gain curves of the antenna on the E plane (Phi is 0 ℃) and the H plane (Phi is 90 ℃) are almost coincident, the maximum gain direction is 0 ℃, and the right-hand circularly polarized gain is 3.0 dBi.
The simulation result shows that the antenna can normally work in a frequency band range of 1561MHz, and the performance of the antenna meets the index requirements of Beidou positioning frequency range, standing wave, gain, plan and the like.
Example 2
The embodiment provides a design method of a dielectric loading silver paste-free antenna, which can be applied to the dielectric loading silver paste-free antenna in the embodiment 1. The design method can adjust the matching degree of the metal conduction band 13 and the annular gap 121 by changing the length of the metal conduction band 13; the operating frequency of the microstrip slot antenna 1 can be controlled by changing the size of the annular slot 121; the perturbation can be introduced by adjusting the size of the rectangular slot 122 and the included angle between the rectangular slot and the metal conduction band 13, so that the slot antenna 1 generates two orthogonal modes corresponding to two radiation resonance points respectively, the phase difference of the two orthogonal modes is adjusted to 90 degrees, and the slot antenna 1 has a circular polarization characteristic; the Q value of the microstrip slot antenna 1 can be changed by changing the shape, size and dielectric constant of the dielectric block 2, thereby balancing the degree of miniaturization and bandwidth of the microstrip slot antenna 1.
If the dielectric loading silver paste-free antenna designed by the embodiment adopts the above design points, the dielectric loading silver paste-free antenna shown in the embodiment 1 can be realized, and the effect of the dielectric loading silver paste-free antenna is achieved.
Example 3
Referring to fig. 6, the method for manufacturing the dielectric loaded silver paste free antenna of this embodiment can manufacture the dielectric loaded silver paste free antennas of embodiments 1 and 2.
The preparation method comprises the following steps:
providing a dielectric substrate 11;
respectively printing a metal patch 12 and a metal conduction band 13 on the upper surface and the lower surface of the dielectric substrate 11;
etching an annular slot 121 and two pairs of rectangular slots 122 at the center of the metal patch 12, wherein the annular slot 121 is coupled with the metal conduction band 13; two rectangular slits 122 in each pair of rectangular slits 122 are symmetrically arranged with the center of the annular slit 121 as a symmetry point, and two pairs of rectangular slits 122 are also symmetrically arranged with the center of the annular slit 121 as a symmetry point; one end of each rectangular gap 122 is communicated with the outer edge of the annular gap 121, and the other opposite end of each rectangular gap 122 radiates outwards;
the dielectric block 2 is directly arranged on the central position of the surface of the dielectric substrate 11 with the metal patch 12, and is directly processed and molded.
According to the microstrip slot antenna 1, the metal conduction band 13 is used as a feed structure, the circular slot, namely the annular slot 121, is used as a radiation structure, the metal conduction band 13 transmits the energy fed into the antenna to the circular slot, and the matching of the metal conduction band 13 and the circular slot can be adjusted by changing the length of the metal conduction band 13; the working frequency of the antenna is controlled by changing the size of the circular ring gap; by adjusting the size of the rectangular slot 122 and the included angle between the rectangular slot and the metal conduction band 13, perturbation can be introduced, so that the antenna generates two orthogonal modes which respectively correspond to two radiation resonance points, the phase difference of the two orthogonal modes is adjusted to 90 degrees, and the antenna has a circular polarization characteristic; the dielectric block 2 is a high-Q radio frequency material for miniaturization of the antenna, and the Q value of the antenna can be changed by changing the shape, size and dielectric constant of the dielectric block 2, thereby balancing the miniaturization degree and bandwidth of the antenna. The microstrip slot antenna 1 is reasonably designed, and the material of the dielectric block 2 is properly selected, so that the antenna normally works in the frequency range of four positioning systems, and the positioning radiation index requirements are met, and the positioning function of a navigation system is realized by the antenna.
In summary, compared with the traditional ceramic microstrip antenna, the dielectric-loaded silver paste-free antenna of the invention has the following advantages:
1. the material cost is greatly reduced, the main cost of the traditional ceramic antenna is concentrated on the silver paste printed on the surface layer, and the silver paste is saved, so that the cost is greatly reduced;
2. the processing cost is reduced, the high dielectric constant medium can be directly placed on the microstrip slot after the model is determined, and the high dielectric constant medium is directly processed and formed without manual debugging;
3. the invention has simple structure, because the navigation system is divided into four categories, namely Beidou, GPS, GLONASS and Galileo, the working frequency range has different requirements, and the antenna meeting different navigation systems can be processed and manufactured after simple adjustment.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A dielectric-loaded, silver-paste-free antenna for navigational positioning, comprising:
the microstrip slot antenna (1) comprises a dielectric substrate (11), and a metal patch (12) and a metal conduction band (13) which are respectively printed on the upper surface and the lower surface of the dielectric substrate (11), wherein the metal conduction band (13) is used as a feed structure of the microstrip slot antenna (1), and the metal patch (12) is used as a radiation structure of the microstrip slot antenna (1); and
a dielectric block (2) which is mounted on the surface of the dielectric substrate (11) having the metal patch (12) and is positioned at the center of the metal patch (12);
characterized in that the metal patch (12) has:
an annular gap (121) coupled to the metal conduction band (13);
two pairs of rectangular gaps (122), wherein the two rectangular gaps (122) in each pair of rectangular gaps (122) are symmetrically arranged by taking the center of the annular gap (121) as a symmetrical point, and the two pairs of rectangular gaps (122) are also symmetrically arranged by taking the center of the annular gap (121) as a symmetrical point; and one end of each rectangular slit (122) is communicated with the outer edge of the annular slit (121), and the other opposite end of each rectangular slit (122) radiates outwards.
2. The dielectric-loaded antenna without silver paste for navigation and positioning as recited in claim 1, wherein the annular slot (121) is elliptical or circular.
3. The dielectric-loaded antenna without silver paste for navigation and positioning as recited in claim 1, wherein on each rectangular slot (122), one end of the connected annular slot (121) is straight and short, and the other opposite end is arc and long.
4. The dielectric-loaded silver-paste-free antenna for navigation and positioning as recited in claim 3, wherein the arc long section is centered at the center of the annular slot (121), and the radius is the distance between the center of the annular slot (121) and the end of the straight short section.
5. The dielectric-loaded antenna without silver paste for navigation and positioning as recited in claim 4, wherein when the annular slot (121) is circular, its radius is 15.7 mm; the width of each rectangular gap (122) is 0.5mm, the length of each straight short section is 2.3mm, the radius of each arc long section is 15.7+ 2.3-18 mm, and the arc angle of each arc long section is 20 deg; and the included angle between the line width center of the straight short section and the line width center of the metal conduction band (13) is 27 deg.
6. The dielectric-loaded silver-paste-free antenna for navigation and positioning as recited in claim 1,
the length of the metal conduction band (13) is 24mm, and the width of the metal conduction band is 2.4 mm;
and/or;
the side length of the metal patch (12) is 35 mm;
and/or;
the dielectric substrate (11) is made of FR4 material with a dielectric constant of 3.5 and a loss tangent of 0.002, and has a side length of 35mm and a thickness of 1 mm.
7. The dielectric-loaded antenna without silver paste for navigation and positioning as recited in claim 1, wherein the dielectric constant of the dielectric block (2) is 8-60.
8. The dielectric-loaded antenna without silver paste for navigation and positioning as recited in claim 7, wherein the dielectric block (2) is made of ceramic with a dielectric constant of 20 and a loss tangent of 0.00005, and is shaped as a rectangular parallelepiped structure, and the length of the rectangular parallelepiped structure is equal to 5mm in width and 3mm in height.
9. The method for designing the dielectric-loaded silver paste-free antenna for navigation and positioning according to any one of claims 1 to 8, wherein the method comprises the following steps:
the matching degree of the metal conduction band (13) and the annular gap (121) is adjusted by changing the length of the metal conduction band (13);
and/or
The working frequency of the microstrip slot antenna (1) is controlled by changing the size of the annular slot (121);
and/or
The method comprises the steps that perturbation is introduced by adjusting the size of a rectangular slot (122) and an included angle between the rectangular slot and a metal conduction band (13), so that two orthogonal modes generated by a slot antenna (1) respectively correspond to two radiation resonance points, the phase difference of the two orthogonal modes is adjusted to 90 degrees, and the slot antenna (1) has a circular polarization characteristic;
and/or
The Q value of the microstrip slot antenna (1) is changed by changing the shape, the size and the dielectric constant of the dielectric block (2), so that the miniaturization degree and the bandwidth of the microstrip slot antenna (1) are balanced.
10. The method for preparing the dielectric loading silver paste-free antenna for navigation and positioning according to any one of claims 1 to 8, wherein the method comprises the following steps:
providing a dielectric substrate (11);
respectively printing a metal patch (12) and a metal conduction band (13) on the upper surface and the lower surface of a dielectric substrate (11);
etching an annular gap (121) and two pairs of rectangular gaps (122) at the central position of the metal patch (12), wherein the annular gap (121) is coupled with the metal conduction band (13); two rectangular gaps (122) in each pair of rectangular gaps (122) are symmetrically arranged by taking the center of the annular gap (121) as a symmetrical point, and the two pairs of rectangular gaps (122) are also symmetrically arranged by taking the center of the annular gap (121) as a symmetrical point; one end of each rectangular gap (122) is communicated with the outer edge of the annular gap (121), and the other opposite end of each rectangular gap (122) radiates outwards;
directly placing the dielectric block (2) on the central position of the surface of the dielectric substrate (11) with the metal patch (12), and directly processing and molding.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115275615A (en) * | 2022-06-08 | 2022-11-01 | 安徽师范大学 | Dual-band circularly polarized antenna for Beidou and GPS |
| CN116068285A (en) * | 2022-12-28 | 2023-05-05 | 中国电信股份有限公司卫星通信分公司 | Satellite antenna network access test method and device and nonvolatile storage medium |
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| CN102610908A (en) * | 2012-03-01 | 2012-07-25 | 西安电子科技大学 | Ultra wide band four-tape circularly polarized antenna |
| CN104269608A (en) * | 2014-09-17 | 2015-01-07 | 电子科技大学 | Double-frequency circular polarization rectangular dielectric resonator antenna |
| KR102196518B1 (en) * | 2019-10-31 | 2020-12-30 | 동국대학교 산학협력단 | Dielectric resonator antenna, mimo antenna, and wireless communication device with the same |
| CN113193350A (en) * | 2021-04-29 | 2021-07-30 | 人民华智通讯技术有限公司 | A no silver thick liquid microstrip antenna for location |
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| CN102610908A (en) * | 2012-03-01 | 2012-07-25 | 西安电子科技大学 | Ultra wide band four-tape circularly polarized antenna |
| CN104269608A (en) * | 2014-09-17 | 2015-01-07 | 电子科技大学 | Double-frequency circular polarization rectangular dielectric resonator antenna |
| KR102196518B1 (en) * | 2019-10-31 | 2020-12-30 | 동국대학교 산학협력단 | Dielectric resonator antenna, mimo antenna, and wireless communication device with the same |
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| CN115275615A (en) * | 2022-06-08 | 2022-11-01 | 安徽师范大学 | Dual-band circularly polarized antenna for Beidou and GPS |
| CN116068285A (en) * | 2022-12-28 | 2023-05-05 | 中国电信股份有限公司卫星通信分公司 | Satellite antenna network access test method and device and nonvolatile storage medium |
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