CN116799508A - Dual-band circularly polarized microstrip antenna - Google Patents
Dual-band circularly polarized microstrip antenna Download PDFInfo
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- CN116799508A CN116799508A CN202310924332.8A CN202310924332A CN116799508A CN 116799508 A CN116799508 A CN 116799508A CN 202310924332 A CN202310924332 A CN 202310924332A CN 116799508 A CN116799508 A CN 116799508A
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- 239000010410 layer Substances 0.000 claims description 72
- 229910052751 metal Inorganic materials 0.000 claims description 44
- 239000002184 metal Substances 0.000 claims description 44
- 230000003071 parasitic effect Effects 0.000 claims description 34
- 230000005855 radiation Effects 0.000 claims description 31
- 238000012545 processing Methods 0.000 claims description 4
- 239000012790 adhesive layer Substances 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 14
- 230000010287 polarization Effects 0.000 abstract description 10
- 230000008878 coupling Effects 0.000 abstract description 6
- 238000010168 coupling process Methods 0.000 abstract description 6
- 238000005859 coupling reaction Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 description 13
- 230000009977 dual effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- 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
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
-
- 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
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
-
- 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
-
- 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
- H01Q9/0435—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave using two feed points
-
- 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
- H01Q9/0464—Annular ring patch
Abstract
The invention discloses a dual-band circularly polarized microstrip antenna, which belongs to the technical field of wireless technology. Through the signal input with the dual-port phase difference of 90 degrees and the gap coupling, the circular polarization of the Ka wave band is realized, and meanwhile, the dual-band circular polarization of the working wave band is realized by utilizing the characteristic defect structure. The antenna can realize the output of circularly polarized signals of 27.6GHz-27.98GHz and 28.74GHz-30.46 GHz.
Description
Technical Field
The invention belongs to the technical field of antennas, and particularly relates to a novel dual-band circularly polarized antenna, wherein two working frequency bands of the antenna are both in Ka frequency bands, and the antenna can be used in the fields of satellite communication and the like.
Background
Microstrip antennas have been rapidly developed after the advent of microwave integration technology and new manufacturing processes. Compared with the traditional antenna, the microstrip antenna has the characteristics of small volume, light weight, low profile and easy integration, and is widely applied in the fields of modern mobile communication, personal communication, medical devices, satellite communication, navigation telemetry and the like. The Ka band has a frequency range of 26.5-40GHz and is mainly used in the field of satellite communication. However, in satellite communication technology, signals are affected by long propagation paths and complex path conditions, so that the receiving accuracy of a communication system is affected, for example, refraction and reflection of an atmospheric layer on the signals can cause deflection of signal polarization directions, and signal polarization mismatch can be caused; the signal propagation loss is larger in rainy and snowy weather, so that the problem of poor communication quality is caused; the earth's dipole magnetic field causes the signal to exhibit faraday effects. The circularly polarized signal can solve the problem of polarization mismatch, has small loss in rainy and snowy weather and can not be influenced by Faraday effect, so that a circularly polarized antenna is mostly adopted in the field of satellite communication. The multi-frequency technology can realize signal communication of a plurality of frequency bands through the design of the antenna, effectively reduces the cost of antenna circuit laying, and has higher research value. Therefore, in the field of satellite communication, research on the Ka-band dual-band circularly polarized microstrip antenna has practical application significance.
Disclosure of Invention
The invention designs the microstrip antenna with double-port feed, slot coupling and parasitic patch based on the requirement of the satellite communication system on the antenna performance, and can meet the requirement of the satellite communication system. The designed antenna has the characteristics of simple structure, low profile and the like.
In order to meet the functional requirements of the satellite communication system, the invention is realized by the following technical scheme:
a dual-band circularly polarized microstrip antenna comprises a first dielectric layer, a second dielectric layer, a third dielectric layer, a fourth dielectric layer and a fifth dielectric layer, wherein the first dielectric layer is arranged in a laminated mode; the power supply structure and the SIW structure are also included;
the upper surface of the first dielectric layer is provided with a radiation patch and a parasitic patch; the radiation patch is of a square annular structure, four parasitic patches are arranged and surround the outer side of the radiation patch;
the feed structure comprises a metal sheet and an L-shaped feed line; the metal sheet is positioned between the third dielectric layer and the fourth dielectric layer, and two U-shaped gaps are etched on the metal sheet; the two U-shaped gaps are positioned right below the radiation patch, and the middle parts of the two U-shaped gaps are mutually perpendicular; the L-shaped feeder lines are provided with two feeder lines, and the two feeder lines are positioned between the fourth dielectric layer and the fifth dielectric layer; the L-shaped feeder lines are in one-to-one correspondence with the U-shaped gaps, and are positioned below the corresponding U-shaped gaps;
the SIW structure is provided with four groups which are in one-to-one correspondence with the parasitic patches; the spacing of the 3 metal through holes of each SIW structure is the same, the upper ends of the metal through holes are connected with the corresponding parasitic patches, and the lower ends of the metal through holes are connected with the metal thin plate;
and a metal floor is arranged on the lower surface of the fifth dielectric layer.
Furthermore, the parasitic patch is of an L-shaped structure, and the inner side of the folded angle of the parasitic patch is opposite to the corner end of the square annular structure.
Further, the upper ends of the 3 metal through holes are respectively distributed on two branches of the L-shaped parasitic patch and the middle bending part of the two branches.
Further, the second dielectric layer is an adhesive layer in antenna processing, and the relative dielectric constants of the first dielectric layer, the second dielectric layer, the third dielectric layer and the fifth dielectric layer are all 2.94, and the dielectric loss tangent is 0.0012. The dielectric constant of the dielectric fourth layer was 10.2, and the dielectric loss tangent was 0.0023.
Further, extension sections are arranged at the tail ends of the short branches of the L-shaped feeder lines and are parallel to the long branches of the L-shaped feeder lines; the two extension sections are respectively positioned right below the middle parts of the corresponding U-shaped gaps and are parallel to each other.
Further, each external corner of the radiation patch is provided with a circular arc-shaped chamfer, and each internal corner is provided with right-angle compensation; the right angle compensation is square.
A dual band circularly polarized antenna comprising a patch antenna layer: the radiation patch 1, the radiation patch defect structure 2 and the parasitic patch unit 3 comprise 4 symmetrical parasitic patch units in total; dielectric layers 4, 6, 7, 11, 13; metal formations 8, 15; the SIW structure 5, 12 metal vias and L-shaped feed structures 12, 14, is characterized in that: the square parasitic patch units 3 are positioned at four corners of the radiation patch 1 and are symmetrically distributed; the radiation patch 1 is provided with four arc-shaped chamfer angles and a characteristic defect structure 2; the feed structure comprises U-shaped gaps 9, 10 and two L-shaped feed lines 12, 14; each group of 3 metal through holes of the SIW structure 5 have the same distance, the upper end of the SIW structure is connected with the parasitic patch units 3, each group of 3 SIW structures is distributed at the two ends of the L-shaped parasitic patch units and the middle bending center, and the lower end of each SIW structure is connected with the lower metal ground 8 of the strip line.
The antenna structure is specifically as follows from top to bottom:
the uppermost layer is a patch unit layer and comprises a radiation patch unit 1 and a parasitic patch unit 3. The radiation patch 1 is square in shape, the four corners are arc-shaped chamfer angles, and the chamfer angles are the same in size; meanwhile, the patch comprises a characteristic defect structure 2, wherein the defect structure 2 is in a shape of a unfilled square, and the unfilled square is different from the patch 1 and is a square chamfer.
The dielectric layers 4, 6 and 7 are downwards, the dielectric layers 4 and 7 are actual processing dielectric layers with the thickness of 0.127mm, the dielectric interlayer bonding layer is 6, the thickness of 0.127mm, and the relative dielectric constants and dielectric loss tangents of the dielectric layers 4, 6 and 7 are the same.
The middle is a coupling metal stratum 8 coplanar with the U-shaped slots 9, 10 through which the feed network is coupled with the radiating patch element. The U-shaped slots 9, 10 are located below the radiating patch 1, the U-shaped slots 9, 10 being diagonally symmetrical with respect to the X-axis and the Y-axis of the antenna overall structure.
The dielectric layer 11 is arranged below the antenna, and is characterized in that the thickness is 0.127mm, and the materials are different from those of the antenna structure 4, 6, 7 and 13.
Below are the feed network layers 12, 14, the strip line 12 is below the U-shaped slot 10, the strip line 14 is below the U-shaped slot 9, the strip line 12 is non-centrally symmetrical with the U-shaped slot 10, the strip line 14 is non-centrally symmetrical with the U-shaped slot 10, the side line of the feed line 12 is aligned with the slot 10 centerline, and the side line of the feed line 14 is aligned with the slot 9 centerline. The strip lines 12, 14 are L-shaped feed structures with cut corners at the corners to reduce distortion of the antenna signal.
The dielectric layer 13 and the metal backboard 15 are arranged at the bottom, the thicknesses of the dielectric layer 13 and the antenna dielectric layers 4, 6 and 7 are the same, the metal backboard 15 is a metal ground, unidirectional radiation of the antenna unit is ensured, and the influence of the antenna back device on antenna signals is reduced.
Compared with the prior art, the invention has the following beneficial effects:
the antenna of the invention is composed of a metal backboard, a dielectric layer, a feed structure, a metal gap layer, a SIW structure, a radiation patch and a parasitic patch. Through the signal input with the dual-port phase difference of 90 degrees and the gap coupling, the circular polarization of the Ka wave band is realized, and meanwhile, the dual-band circular polarization of the working wave band is realized by utilizing the characteristic defect structure. The antenna can realize the output of circularly polarized signals of 27.6GHz-27.98GHz and 28.74GHz-30.46 GHz.
Drawings
Fig. 1 is a schematic diagram of the overall structure of an antenna;
FIG. 2 is a side view of a dual band circularly polarized antenna;
FIG. 3 is a top view of a dual band circularly polarized antenna radiating element, a parasitic patch element;
FIG. 4 is a schematic top view of a dual band circularly polarized antenna;
FIG. 5 is a graph of the reflection coefficient of a dual band circularly polarized antenna;
FIG. 6 is a graph of circular polarization axis ratios for a dual band circularly polarized antenna;
Detailed Description
A dual band circularly polarized antenna comprising a patch antenna layer: the radiation patch 1, the radiation patch defect structure 2 and the parasitic patch unit 3 comprise 4 symmetrical parasitic patch units in total; dielectric layers 4, 6, 7, 11, 13; a metal sheet 8 and a metal land 15; the SIW structure 5 is provided with 12 metal through holes and L-shaped feeder lines 12 and 14, and the loop-shaped parasitic patch units 3 are positioned at four corners of the radiation patch 1 and are symmetrically distributed; the radiation patch 1 is provided with four arc-shaped chamfer angles and a characteristic defect structure 2; the feed structure comprises U-shaped slots 9, 10 and two L-shaped feed lines 12, 14; each group of 3 metal through holes of the SIW structure 5 have the same distance, the upper end of the SIW structure is connected with the parasitic patch units 3, each group of 3 SIW structures is distributed at the two ends of the L-shaped parasitic patch units and the middle bending center, and the lower end of each SIW structure is connected with the lower metal ground 8 of the strip line.
The antenna structure is specifically as follows from top to bottom:
the uppermost layer is a patch unit layer and comprises a radiation patch unit 1 and a parasitic patch unit 3. The radiation patch 1 is square in shape, the four corners are arc-shaped chamfer angles, and the chamfer angles are the same in size; meanwhile, the patch comprises a characteristic defect structure 2, wherein the defect structure 2 is in a shape of a unfilled square, and the unfilled square is different from the patch 1 and is a square chamfer.
The dielectric layers 4, 6 and 7 are downwards, the dielectric layers 4 and 7 are actual processing dielectric layers with the thickness of 0.127mm, the dielectric interlayer bonding layer is 6, the thickness of 0.127mm, and the relative dielectric constants and dielectric loss tangents of the dielectric layers 4, 6 and 7 are the same.
The middle is a coupling metal stratum 8 coplanar with the U-shaped slots 9, 10 through which the feed network is coupled with the radiating patch element. The U-shaped slots 9, 10 are located below the radiating patch 1, the U-shaped slots 9, 10 being diagonally symmetrical with respect to the X-axis and the Y-axis of the antenna overall structure.
The dielectric layer 11 is arranged below the antenna, and is characterized in that the thickness is 0.127mm, and the materials are different from those of the antenna structure 4, 6, 7 and 13.
Below are feed network layers 12, 14 (L-shaped feed lines), a strip line (L-shaped feed line) 12 is below the U-shaped slot 10, a strip line 14 is below the U-shaped slot 9, the strip line 12 is non-centrally symmetrical with the U-shaped slot 10, the strip line 14 is non-centrally symmetrical with the U-shaped slot 10, the side line of the feed line 12 is aligned with the slot 10 center line, and the side line of the feed line 14 is aligned with the slot 9 center line. The strip lines 12, 14 are L-shaped feed structures with cut corners at the corners to reduce distortion of the antenna signal.
The dielectric layer 13 and the metal backboard 15 are arranged at the bottom, the thicknesses of the dielectric layer 13 and the antenna dielectric layers 4, 6 and 7 are the same, the metal backboard 15 is a metal ground, unidirectional radiation of the antenna unit is ensured, and the influence of the antenna back device on antenna signals is reduced.
The following describes in further detail the embodiments of the present invention with reference to figures 1-4 and examples.
Referring to fig. 1 to 4, fig. 1 is a schematic diagram of the overall structure of a dual-band circularly polarized antenna, fig. 2 is a side view of the dual-band circularly polarized antenna, fig. 3 is a plan view of a patch unit and a parasitic patch unit of the dual-band circularly polarized antenna, and fig. 4 is a schematic diagram of a plan view of the dual-band circularly polarized antenna. As shown in fig. 1, the antenna is composed of patch element layers (including structures 1, 2, 3), dielectric layers 4, 6, 7, 11, 13, a metal sheet 8, a metal ground 15, and feeder networks 12, 14. The topmost radiation patch 1 of the antenna comprises 4 arc-shaped chamfer angles and a defect structure 2, wherein the defect structure 2 is characterized by a chamfer square, the chamfer shape is a small square, and the defect structure 2 and the arc chamfer angles can obviously optimize the S11 parameter of the antenna.
The size and position of the parasitic patch element 3 has an effect on the antenna S11 parameter performance. The antenna signals are fed through the feed networks 12 and 14, the phases of the two port feed signals are different by 90 degrees, the U-shaped gaps 9 and 10 are symmetrical with respect to the X axis and the Y axis of the patch unit, the two feed signals together ensure the purity of circularly polarized waves of the antenna at two working frequencies, when the antenna is in a working state, the U-shaped gaps 9 and 10 are excited to excite a TM10 mode on the radiation patch 1 in a coupling mode, and the radiation patch 1 is excited to radiate circularly polarized waves outwards. The size of the radiation patch 1 is used for adjusting the center frequency of the antenna, when the size of the radiation patch 1 is reduced, the center frequency of the antenna is increased, the heights of the dielectric layers 4, 6 and 7 and the size of the parasitic element patch 3 influence the pattern performance of the antenna, and the non-central symmetry of the feed networks 12 and 14 and the X axis and the Y axis of the patch element is used for increasing the circular polarization performance of the antenna at the working frequency, so that the circular polarization axial ratio width of the antenna at the working frequency reaches more than about 50 degrees respectively.
The metal through holes, the metal thin plate 8 and the metal ground 15 of the radiating patch unit 1, the parasitic patch unit 3 and the SIW structure 5 all adopt metals with smaller resistivity, such as aluminum, copper, gold and the like, so as to reduce antenna loss. Dielectric layers 4, 6, 7, and 13 were formed using rogers rt/duroid6002, and had a relative dielectric constant of 2.94 and a dielectric loss tangent of 0.0012. The dielectric layer 13 was formed using RogersRT/duroid6010, and had a relative dielectric constant of 10.2 and a dielectric loss tangent of 0.0023.
The dual band circularly polarized antenna configuration is described herein as being selected from one combination of dimensions:
structures 1, 2, 3 in fig. 2 were 0.018mm thick, structures 4, 6, 7 were 0.127mm thick, structure 5 was 0.417mm long, structure 8 was 0.018mm thick, structure 11 was 0.127mm thick, structure 12 was 0.018mm thick, structure 13 was 0.127mm thick, and structure 15 was 0.018mm thick.
Specific dimensions of the radiating patch and parasitic patch structure are depicted in fig. 3, with the following data: the width 16 of the defect structure 2 is 0.8mm, the square chamfer width 17 is 0.2mm, the width 18 of the radiation patch structure 1 is 2.5mm, the circular arc chamfer radius 19 is 0.2mm, the distance 20 from one end of the L-shaped parasitic patch structure 3 to the center of the antenna is 0.9mm, the end length 21 is 1mm, the width 22 is 0.4mm, and the diameter 23 of the metal through hole of the SIW structure 5 is 0.1mm.
Fig. 4 is a schematic top view of a dual-band circularly polarized antenna, the U-shaped slots 9, 10 have the same structural dimensions, the bottom 24 of the structure 10 has a length of 1.2mm, the sides 25 has a length of 0.6mm, the width 26 has a width of 0.1mm, the feed networks 12, 14 have the same structural dimensions, the feed port of the structure 14 has a distance 30 from the antenna centerline of 2.6mm, the feed line 27 has a length of 4.2mm,28 has a length of 2.5mm, and the feed line of the structure 12 has a length 29 of 0.8mm.
At this time, a simulation diagram of the antenna reflection coefficient S11 is shown in fig. 5.
FIG. 5 is a graph of reflection coefficient of the dual-band circularly polarized antenna, and the graph shows that the S11 parameter of the antenna is lower than-10 dB in the frequency ranges of 27.6GHz-27.98GHz and 28.74GHz-30.46GHz of Ka wave bands, so that the dual-band characteristic of the antenna is realized.
At this time, an antenna axis ratio simulation is shown in fig. 6.
FIG. 6 is an axial ratio graph of the dual-band circularly polarized antenna, and the graph shows that the axial ratio of the antenna in the frequency range of 27.6GHz-27.98GHz and 28.74GHz-30.46GHz of Ka band is significantly lower than 3dB, which indicates that the circularly polarized characteristic of the antenna is excellent when the antenna works in dual bands.
If the performance parameters are required to be changed on the basis of the antenna, the antenna with different center frequencies can be obtained, and different parameters can be adjusted according to specific embodiments, for example, the center frequency of the antenna can be adjusted by changing the sizes of the main radiation patch and the gap and the thickness of the dielectric substrate, the position of the port can be adjusted, impedance matching can be adjusted, and the like.
Claims (6)
1. A dual-band circularly polarized microstrip antenna comprises a first dielectric layer, a second dielectric layer, a third dielectric layer, a fourth dielectric layer and a fifth dielectric layer, wherein the first dielectric layer is arranged in a laminated mode; the power supply device is characterized by further comprising a feed structure and a SIW structure;
the upper surface of the first dielectric layer is provided with a radiation patch and a parasitic patch; the radiation patch is of a square annular structure, four parasitic patches are arranged and surround the outer side of the radiation patch;
the feed structure comprises a metal sheet and an L-shaped feed line; the metal sheet is positioned between the third dielectric layer and the fourth dielectric layer, and two U-shaped gaps are etched on the metal sheet; the two U-shaped gaps are positioned right below the radiation patch, and the middle parts of the two U-shaped gaps are mutually perpendicular; the L-shaped feeder lines are provided with two feeder lines, and the two feeder lines are positioned between the fourth dielectric layer and the fifth dielectric layer; the L-shaped feeder lines are in one-to-one correspondence with the U-shaped gaps, and are positioned below the corresponding U-shaped gaps;
the SIW structure is provided with four groups which are in one-to-one correspondence with the parasitic patches; the spacing of the 3 metal through holes of each SIW structure is the same, the upper ends of the metal through holes are connected with the corresponding parasitic patches, and the lower ends of the metal through holes are connected with the metal thin plate;
and a metal floor is arranged on the lower surface of the fifth dielectric layer.
2. The dual-band circularly polarized microstrip antenna as in claim 1 wherein said parasitic patch has an L-shaped configuration with the inside of the fold facing the corner end of the square loop configuration.
3. The dual-band circularly polarized microstrip antenna of claim 1, wherein the upper ends of the 3 metal through holes are respectively distributed on two branches of the L-shaped parasitic patch and at a middle bending position of the two branches.
4. The dual-band circularly polarized microstrip antenna of claim 1, wherein the second dielectric layer is an adhesive layer during antenna processing, and the relative dielectric constants of the first dielectric layer, the second dielectric layer, the third dielectric layer and the fifth dielectric layer are all 2.94, and the dielectric loss tangent is 0.0012. The dielectric constant of the dielectric fourth layer was 10.2, and the dielectric loss tangent was 0.0023.
5. The dual-band circularly polarized microstrip antenna as claimed in claim 1, wherein the ends of the short branches of the L-shaped feeder are each provided with an extension section, and the extension sections are parallel to the long branches of the L-shaped feeder; the two extension sections are respectively positioned right below the middle parts of the corresponding U-shaped gaps and are parallel to each other.
6. The dual-band circularly polarized microstrip antenna of claim 1 wherein each outer corner of the radiating patch has a circular arc-shaped chamfer and each inner corner has a right angle compensation; the right angle compensation is square.
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| CN202310924332.8A CN116799508A (en) | 2023-07-26 | 2023-07-26 | Dual-band circularly polarized microstrip antenna |
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| CN202310924332.8A CN116799508A (en) | 2023-07-26 | 2023-07-26 | Dual-band circularly polarized microstrip antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117117493A (en) * | 2023-10-24 | 2023-11-24 | 大陆汽车部件(苏州)有限公司 | Antenna device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117117493A (en) * | 2023-10-24 | 2023-11-24 | 大陆汽车部件(苏州)有限公司 | Antenna device |
| CN117117493B (en) * | 2023-10-24 | 2024-02-06 | 大陆汽车部件(苏州)有限公司 | Antenna device |
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