CN113206382A - Feed antenna unit for automobile navigation - Google Patents
Feed antenna unit for automobile navigation Download PDFInfo
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- CN113206382A CN113206382A CN202110458419.1A CN202110458419A CN113206382A CN 113206382 A CN113206382 A CN 113206382A CN 202110458419 A CN202110458419 A CN 202110458419A CN 113206382 A CN113206382 A CN 113206382A
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- antenna
- cylinder
- metal floor
- feed
- car navigation
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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
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
-
- 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
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention relates to a feed antenna unit for automobile navigation, which comprises a cylinder (3), a plurality of antenna assemblies (2) and an antenna housing (1), wherein the antenna assemblies (2) are attached to the cylinder (3) to form a conformal array antenna, and the antenna housing (1) is covered on the outer side of the conformal array antenna to form the outer surface of the conformal array antenna to be attached to the inner wall of the antenna housing (1). The invention has good dual-frequency dual-polarization performance through the conformal array antenna, and can radiate in all directions at low frequency band on the azimuth plane.
Description
Technical Field
The invention relates to the technical field of feed antennas, in particular to a feed antenna unit for automobile navigation.
Background
The terrain contour matching system consisting of the inertial navigation system, the radio altimeter and the digital map is a combined navigation system, has the advantage of all-weather low-altitude navigation, and has wide development prospect in the aspects of high-precision cruise missile, unmanned aircraft and low-altitude aircraft application. The construction and the perfection of the Beidou satellite navigation system can enable China to get rid of excessive dependence on GPS, eliminate hidden dangers such as GPS interference or deception and the like, and can freely use the navigation and positioning functions of China.
Therefore, the Beidou navigation and terrain profile matching navigation are combined to improve the navigation precision, so that the system can continue to work stably and reliably in a severe environment. Against this background, the invention provides a microstrip antenna applied to combined navigation of a terrain contour matching system and a Beidou satellite navigation system, wherein the microstrip antenna works in a Beidou B3 waveband and a radio altimeter antenna C waveband, realizes circular polarization in a B3 waveband, realizes linear polarization in the C waveband, is conformal with a projectile body, and realizes omnidirectional coverage in an azimuth plane by a directional diagram. The invention mainly carries out intensive research around the problems of dual-frequency and dual-polarization mode of the antenna and miniaturization and conformality.
In the process of automobile navigation, an automobile navigation antenna device is an indispensable component in Beidou navigation, and in the research and development process of Beidou navigation, an antenna becomes one of key problems which must be solved. The antenna is required not to affect its aerodynamic performance, but not to destroy its mechanical structure and strength. Therefore, the antenna array with the outstanding performance advantages of low profile, easy integration and the like is widely applied to automobiles.
The automobile navigation antenna device has higher working frequency, the size is basically not limited, and the distance between the cambered surfaces of the adjacent units is larger than or close to the half wavelength of the working frequency of the antenna.
However, under the condition that the size of the antenna is limited, if the arc surface distance between adjacent units is smaller than half wavelength, the coupling between the units is increased, the voltage standing wave ratio of the antenna array is rapidly deteriorated, and the radiation characteristic is also fluctuated severely and is extremely unstable.
Therefore, in the Beidou navigation frequency band, the size of the antenna is limited by the surface area of the conical surface of the conformal body, the miniaturization of the antenna becomes the core problem in design, and the existing automobile navigation antenna has lower external radiation performance when in use, so that the improvement is urgently needed.
Disclosure of Invention
The invention aims to provide a feed antenna unit for automobile navigation, which has good dual-frequency dual-polarization performance by arranging a conformal array antenna, can radiate in an omnidirectional manner at a low frequency band on an azimuth plane, and can solve the problems in the background technology.
In order to solve the above technical problems, the technical solution of the feed antenna unit for car navigation provided by the present invention is as follows:
the embodiment of the invention discloses a feed antenna unit for automobile navigation, which comprises a cylinder, a plurality of antenna assemblies and an antenna housing, wherein the antenna assemblies are attached to the cylinder to form a conformal array antenna, and the antenna cover is arranged on the outer side of the conformal array antenna to form the outer surface of the conformal array antenna to be attached to the inner wall of the antenna housing.
In any of the above aspects, preferably, a gap exists between a plurality of the antenna elements.
In any of the above aspects, preferably, the number of the antenna assemblies is 2N.
In any of the above aspects, preferably, the antenna assembly is provided with 4 or 8 or 10 or 16.
In any one of the above aspects, it is preferable that the antenna assembly includes a first metal floor, a second metal floor, a third metal floor, and a fourth metal floor, and one side of the first metal floor, the second metal floor, the third metal floor, and the fourth metal floor is attached to the surface of the cylinder.
In any one of the above aspects, the feed antenna unit for car navigation preferably further includes a mounting groove, the mounting groove is provided on an outer surface of the cylinder, and the plurality of antenna assemblies are mounted in the mounting groove.
In any of the above aspects, the radome preferably has a relative dielectric constant of 1.2.
In any of the above schemes, preferably, the inner surface of the cylinder is provided with a mounting groove, so as to attach the plurality of antenna elements to the mounting groove on the inner surface of the cylinder, a radius R of the cylinder conformal array antenna is 54mm, a height H is 100mm, a layer with a thickness Ta of 13mm is cut out on the cylinder as the mounting groove for placing the conformal array antenna, 4 array elements of the conformal array antenna are respectively a first metal floor, a second metal floor, a third metal floor and a fourth metal floor, the first metal floor, the second metal floor, the third metal floor and the fourth metal floor are uniformly distributed around the mounting groove on the cylinder, ports at corresponding positions of each antenna element maintain equal-amplitude and same-phase feeding, for the design of the array antenna, firstly, a metal floor with a curvature identical to that of the bottom of the cylinder is processed, then on being fixed in this floor with the antenna unit, cover antenna house 1 for the antenna top at last for radius after adding antenna house 1 keeps 54mm, in order to reduce the influence of antenna house to the antenna performance, selects the relative dielectric constant of antenna house to be 1.2, the cylinder is cylinder metal bullet, and cylinder metal bullet and antenna house still can produce certain influence to the antenna performance, consequently need adjust the optimization to the antenna size, and the antenna size (unit mm) of final determination is: l0-56, L1-42.4, W1-45, Wd-2.6, Ws-3, Lsx-11, Lsy-6.5, d-9.8, dfx-4.5, dfy-8.8, dfy 2-5.
In any of the above aspects, preferably, the antenna assembly has a circular groove, and a width of the circular groove is adjustable.
In any of the above aspects, preferably, the antenna assembly is provided with a U-shaped groove.
Compared with the prior art, the invention has the beneficial effects that:
through attaching a plurality of antenna components on the cylinder to form a conformal array antenna, the antenna shroud is located the conformal array antenna outside, attaches on the antenna house inner wall in the surface that forms conformal array antenna, through setting up conformal array antenna, it has good dual-frenquency dual polarization performance, on the azimuth plane, can the omnidirectional radiation at the low band.
Drawings
The drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.
Fig. 1 is a perspective view of a preferred embodiment of a feed antenna unit for car navigation according to the present invention.
Fig. 2 is a plan view of fig. 1 of the feed antenna unit for car navigation according to the present invention.
Fig. 3 is a schematic view of the feed antenna unit for car navigation of fig. 1 with the radome removed, according to the present invention.
Fig. 4 is a schematic view of a first metal floor, a second metal floor, a third metal floor and a fourth metal floor of the feed antenna unit for car navigation according to the present invention.
Fig. 5 is a schematic diagram of an antenna assembly disposed on both sides of a cylinder of a feed antenna unit for car navigation according to the present invention.
Fig. 6 is a schematic diagram illustrating a broadside coupling filter slotted on the bottom surface of a car navigation feed antenna unit according to the present invention, which is compact in structure and has better broadband performance and out-of-band rejection.
Fig. 7 is an antenna schematic diagram of a feed antenna unit for car navigation according to the present invention.
The reference numbers in the figures illustrate:
1. an antenna cover; 2. an antenna assembly; 21. a first metal floor; 22. a second metal floor; 23. a third metal floor; 24. a fourth metal floor; 3. a cylinder.
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.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
For better understanding of the above technical solutions, the technical solutions of the present invention will be described in detail below with reference to the drawings and the detailed description of the present invention.
Example 1:
as shown in fig. 1 and 2, an embodiment of the present invention discloses a feed antenna unit for car navigation, including a cylinder 3, a plurality of antenna components 2 and an antenna housing 1, where the plurality of antenna components 2 are disposed, the plurality of antenna components 2 are attached to the cylinder 3 to form a conformal array antenna, and the antenna housing 1 is covered on an outer side of the conformal array antenna to form an outer surface of the conformal array antenna to be attached to an inner wall of the antenna housing 1.
As shown in fig. 4, there are gaps between a plurality of antenna assemblies 2, and the number of the antenna assemblies 2 is 2N, and preferably, there are 4 or 6 or 8 or 10 antenna assemblies 2.
As shown in fig. 2 and 4, the antenna assembly 2 includes a first metal floor 21, a second metal floor 22, a third metal floor 23, and a fourth metal floor 24, and one side of the first metal floor 21, the second metal floor 22, the third metal floor 23, and the fourth metal floor 24 is attached to the surface of the cylinder 3.
As shown in fig. 2 and 3, the feed antenna unit for car navigation further includes a mounting groove 31, the mounting groove 31 is disposed on an outer surface of the cylinder 3, the plurality of antenna assemblies 2 are mounted in the mounting groove 31, and a relative dielectric constant of the radome 1 is 1.2.
In the feeding antenna unit for car navigation according to the embodiment of the present invention, a radius R of a cylinder 3 conformal to the conformal array antenna is 54mm, a height H thereof is 100mm, a layer with a thickness Ta of 13mm is cut out on the cylinder 3 as an installation slot 31 for installing the conformal array antenna, 4 array elements of the conformal array antenna are respectively a first metal floor 21, a second metal floor 22, a third metal floor 23 and a fourth metal floor 24, the first metal floor 21, the second metal floor 22, the third metal floor 23 and the fourth metal floor 24 are uniformly distributed around the installation slot 31 on the cylinder 3, ports of corresponding positions of each antenna unit are maintained to feed in-phase with equal amplitude, for the design of the array antenna, firstly, a metal floor with a bending curvature identical to that of a cylinder below is processed, and then the antenna unit is fixed on the floor, cover antenna house 1 for last antenna top for radius after adding antenna house 1 keeps 54mm, and in order to reduce the influence of antenna house 1 to the antenna performance, the relative dielectric constant of selecting antenna house 1 is 1.2, cylinder 3 is the cylinder metal bullet, and cylinder metal bullet and antenna house 1 still can produce certain influence to the antenna performance, consequently need adjust the optimization to the antenna size, and the antenna size (unit mm) of final determination is: l0-56, L1-42.4, W1-45, Wd-2.6, Ws-3, Lsx-11, Lsy-6.5, d-9.8, dfx-4.5, dfy-8.8, dfy 2-5.
As shown in fig. 3 and 4, after the antenna elements are bent and conformed, the performance of the antenna elements may change, and in order to ensure that the conformal array antenna performs well, the single antenna conformation is firstly studied. The antenna is mainly bent through an antenna patch unit to be attached to a cylinder to be conformal, the radius R of the cylinder to be conformal is 36mm, and a mounting groove 31 with the thickness T being 4mm (namely the thickness of the antenna unit) and a layer with the height H being 60mm are dug out of the cylinder to be used for arranging the conformal array antenna. When the parameters of the conformal array antenna are kept consistent with the parameters of the planar antenna unit, only the width increment Wd of the patch antenna unit is changed for research, and the performance of the conformal antenna unit changes along with the Wd.
Based on the above analysis study of the conformal antenna unit, the design of the conformal array antenna is performed by taking Wd as 5.3 mm. The conformal cylinder radius R is 36mm, the whole height is 100mm, a layer with the thickness T being 4mm and the height H being 60mm is dug for the cylinder for arranging the array antenna, the array antenna is mainly composed of 4 array elements which are uniformly distributed around the cylinder, in order to simplify the model, the ports corresponding to the antenna units are fed with equal amplitude and same phase, the phase difference between two low-frequency ports of each antenna unit is 90 degrees, the antenna units of the array still have influence unavoidably, further adjustment and optimization are still needed, and the finally determined antenna size (unit mm) is as follows: l1-43, W1-48.3, Wd-5.3, Ws-3, Lsx-11, Lsy-4.5, d-9.8, dfx-6, dfy-8.8, dfy 2-5.2.
Example 2:
as shown in fig. 5, an installation groove 31 is formed on an inner surface of the cylinder 3 to attach the antenna elements 2 to the installation groove 31 on the inner surface of the cylinder 3, a circular groove is formed on the antenna elements 2, the width of the circular groove is adjustable, and a U-shaped groove is formed on the antenna elements 2.
The conformal array antennas are arranged on the inner surface and the outer surface of the cylinder 3, and are fed in a constant-amplitude and same-phase mode through coaxial lines. Therefore, the cutting angle DL and the grooved groove depth Ls of the conformal array antenna also need to be adjusted, and particularly, the size DL of the cutting angle needs to be increased, so that the reflection coefficient and the axial ratio performance of the low frequency band are kept good. The final optimized antenna parameters DL and Ls are 7mm and 2mm, while the other parameters remain unchanged.
The broadside coupling filter with the slot on the bottom surface is compact in structure and has better broadband performance and out-of-band rejection, as shown in fig. 6, the arc-shaped microstrip lines at the two ends of the upper surface are 1/4 central wavelengths, an opening circular slot with the length being about 1/2 central wavelengths is formed in the corresponding position of the microstrip line on the ground plate, the opening circular slot and the microstrip line form a broadside coupling structure, the widths of the slot line and the microstrip line are adjusted, different broadband can be obtained, the lengths of the microstrip line and the slot length are adjusted, a central frequency point can be finely adjusted, and the microstrip lines at the left end and the right end of the upper surface are 50 omega impedance lines.
The broadband antenna is formed by cutting and adding branches to a basic circular antenna, the antenna has a large working width but a small size, as shown in fig. 7, a dielectric substrate which is the same as a filter is adopted, and the structural parameters are as follows: r0＝8.2mm，r02.5mm, the widths of all the branches and the notches of 1-6 are 0.4mm, the lengths of 1 and 2 are 0.8mm, the lengths of 3, 4 and 5 are 1.5mm, the length of 6 is 0.3mm, the rectangular strip below the conformal array antenna is a 50-ohm impedance line, W is 2.8mm, L is 10.3mm, the length H of the lower surface ground is 10mm, and the width W of the notch is W02.5mm, length L0＝3.6mm。
Based on the key design, the 4-element conformal array antenna is finally subjected to simulation optimization. The result shows that the antenna has | S11| less than-10 dB, axial ratio less than 5dB, location-plane axial ratio less than 1dB for center frequency, gain over 2dB and out-of-roundness less than 0.5 dB; the | S11| in the high frequency band is less than-10 dB, the position face gains are all greater than 1.6dB at the center frequency, the out-of-roundness is less than 2.2dB, and the cross polarization gain is lower than the main polarization gain by more than 20 dB. The array antenna is proved to have good dual-frequency dual-polarization omnidirectional radiation performance.
The invention provides a double-layer structure adopting single feed point feed to realize the double-frequency dual-polarization performance of the antenna, and the key points of the invention are that firstly, two dielectric plates with different relative dielectric constants are reasonably selected; secondly, the position of the feed point influences the impedance matching of the two frequency bands and the circular polarization performance of the low frequency band; and thirdly, cutting the angle of the low-frequency patch to generate circular polarization. Fourthly, slotting two opposite sides of the low-frequency patch, and offsetting the influence of the cylindrical conformality on the circular polarization performance of the antenna by adjusting the size of the low-frequency patch; fifthly, a U-shaped groove is formed in the high-frequency patch for adjusting impedance matching of a high frequency band, and a vertical seam is formed in the current direction to restrain a high-order mode.
The feed antenna unit for automobile navigation in the embodiment of the invention adopts a combined dual-frequency dual-polarized conformal array antenna, and provides a novel structure that a high-frequency patch is arranged in the middle of a low-frequency patch square ring to form a nested combined antenna, thereby realizing dual-frequency dual polarization. And a metal column is added between the two conformal array antennas to reduce the influence between the conformal array antennas, so that better radiation performance is obtained. In addition, an improved method for adjusting the square conformal array antenna to be rectangular is provided by comparing the changes of the reflection coefficients, the axial ratios and other performances before and after the antenna units are conformal to the cylinder, so that the low-frequency-band circular polarization performance is improved, and finally, the 4-element conformal array antenna is subjected to simulation optimization and has good dual-frequency dual-polarization performance; in azimuth, the omnidirectional radiation can be realized in a low frequency band, but the out-of-roundness of a high frequency band reaches 3.6dB, and only the omnidirectional radiation can be basically realized.
The feed antenna unit for automobile navigation in the embodiment of the invention adopts a dual-frequency dual-polarized antenna loaded with a gap, firstly, dual-frequency dual-polarized antenna units in a single feed mode and a double feed mode are respectively designed, the single feed point feed antenna mainly realizes the circular polarization performance of a low frequency band by adjusting a corner cut, loaded branches and the gap, and a high frequency band introduced by the gap works in an online polarization mode. But because the axial ratio in its low band is only less than 7dB and the pattern of the high band is imperfect. For the low frequency band, two orthogonal modes with equal amplitude and 90-degree difference are excited by two feed points, and the circular polarization of the low frequency band is realized by adjusting the sizes of the patches and the gaps; for high frequency bands, linear polarization properties are produced by the loaded slot. The axial ratio of the antenna in a low frequency band is less than 1.5dB, which is the performance which is difficult to achieve by single feed point feed under the same condition. The main radiation direction of the directional diagram at the high-band central frequency is in the axial direction, and the directional diagram can be applied to the conformal array antenna designed by the text so as to realize omnidirectional radiation.
The feed antenna unit for automobile navigation in the embodiment of the invention keeps the planar embedded type of the antenna unit, and the other type is a bending type of attaching the antenna unit to a cylindrical surface. The axial ratio of the array antenna in the low-frequency band is less than 3dB, the circumferential axial ratio at the central frequency is less than 1.5dB, and the circular polarization performance is good. The gain of the curved conformal array antenna on the low-frequency azimuth plane and the high-frequency azimuth plane is more than 1.5dB, and the out-of-roundness is less than 1.5dB, which shows that the omnidirectional performance is good, but the high-frequency section directional diagram has more obvious side lobes. The embedded low-frequency gain is more than 1dB, and the out-of-roundness is less than 0.5 dB; and the out-of-roundness at the high frequency band is larger, namely 3.96dB, and the gain is better than 2.3dB, so that the requirement of omnidirectional radiation can be met.
The feed antenna unit for automobile navigation in the embodiment of the invention adopts a single feed point feed double-layer structure to realize the double-frequency and double-polarization performance of the antenna. The antenna adopts an upper layer structure and a lower layer structure, the dielectric constants of the dielectric plates are different, and the high-frequency patches and the low-frequency patches are respectively positioned on the upper layer and the lower layer, so that the adjustment and optimization of the sizes of the high-frequency patches and the low-frequency patches are facilitated. Wherein, it also provides the method that two sides of the low-frequency patch are grooved to adjust the circular polarization performance of the cylindrical conformal antenna;
the high-frequency patch is provided with the U-shaped groove for adjusting impedance matching of a high frequency band, and the vertical seam is formed along the current direction so as to inhibit a high order mode, a 4-element conformal array antenna is designed, the antenna has good circular polarization performance in a low frequency band of 1.258 GHz-1.278 GHz, has good linear polarization performance in a high frequency band of 4.3GHz +/-61.5 MHz, and meets the omnidirectional radiation requirement of an azimuth plane at high and low frequencies.
Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A kind of car navigation uses the feed antenna element, characterized by that: the antenna comprises a cylinder (3), an antenna component (2) and an antenna housing (1), wherein the antenna component (2) is provided with a plurality of antenna components (2) which are attached to the cylinder (3) to form a conformal array antenna, and the antenna housing (1) is covered on the outer side of the conformal array antenna to form that the outer surface of the conformal array antenna is attached to the inner wall of the antenna housing (1).
2. The feed antenna unit for car navigation according to claim 1, characterized in that: gaps exist among a plurality of antenna components (2).
3. The feed antenna unit for car navigation according to claim 2, characterized in that: the number of the antenna components (2) is 2N.
4. The feed antenna unit for car navigation according to claim 3, characterized in that: the antenna assembly (2) is provided with 4 or 8 or 10 or 16.
5. The feed antenna unit for car navigation according to claim 4, characterized in that: the antenna assembly (2) comprises a first metal floor (21), a second metal floor (22), a third metal floor (23) and a fourth metal floor (24), and one sides of the first metal floor (21), the second metal floor (22), the third metal floor (23) and the fourth metal floor (24) are attached to the surface of the cylinder (3).
6. The feed antenna unit for car navigation according to claim 5, characterized in that: the antenna assembly is characterized by further comprising a mounting groove (31), wherein the mounting groove (31) is formed in the outer surface of the cylinder (3), and the antenna assemblies (2) are mounted in the mounting groove (31).
7. The feed antenna unit for car navigation according to claim 6, characterized in that: the antenna housing (1) has a relative dielectric constant of 1.2.
8. The feed antenna unit for car navigation according to any one of claims 1 to 7, characterized in that: the inner surface of the cylinder (3) is provided with a mounting groove (31) so that the antenna components (2) can be attached to the mounting groove (31) on the inner surface of the cylinder (3).
9. The feed antenna unit for car navigation according to claim 8, characterized in that: the antenna component (2) is provided with a circular groove, and the width of the circular groove is adjustable.
10. The feed antenna unit for car navigation according to claim 8, characterized in that: and the antenna component (2) is provided with a U-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110458419.1A CN113206382A (en) | 2021-04-27 | 2021-04-27 | Feed antenna unit for automobile navigation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110458419.1A CN113206382A (en) | 2021-04-27 | 2021-04-27 | Feed antenna unit for automobile navigation |
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| Publication Number | Publication Date |
|---|---|
| CN113206382A true CN113206382A (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110458419.1A Withdrawn CN113206382A (en) | 2021-04-27 | 2021-04-27 | Feed antenna unit for automobile navigation |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5874915A (en) * | 1997-08-08 | 1999-02-23 | Raytheon Company | Wideband cylindrical UHF array |
| US20030201937A1 (en) * | 2002-04-25 | 2003-10-30 | Lee Choon Sae | Cylindrical double-layer microstrip array antenna |
| CN101281998A (en) * | 2007-10-19 | 2008-10-08 | 哈尔滨工业大学 | Millimeter wave band broadband cylinder conformal 4*4 microstrip antenna as well as design method thereof |
| CN102427160A (en) * | 2011-08-10 | 2012-04-25 | 南京信息职业技术学院 | Conformal antenna for cylindrical carrier and application method thereof |
| CN207098043U (en) * | 2017-07-11 | 2018-03-13 | 成都嘉晨科技有限公司 | The conformal array antenna of high-gain wave beam forming |
| CN108767466A (en) * | 2018-06-06 | 2018-11-06 | 合肥工业大学 | A kind of super wide band microstrip characteristics of conformal array antenna |
-
2021
- 2021-04-27 CN CN202110458419.1A patent/CN113206382A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5874915A (en) * | 1997-08-08 | 1999-02-23 | Raytheon Company | Wideband cylindrical UHF array |
| US20030201937A1 (en) * | 2002-04-25 | 2003-10-30 | Lee Choon Sae | Cylindrical double-layer microstrip array antenna |
| CN101281998A (en) * | 2007-10-19 | 2008-10-08 | 哈尔滨工业大学 | Millimeter wave band broadband cylinder conformal 4*4 microstrip antenna as well as design method thereof |
| CN102427160A (en) * | 2011-08-10 | 2012-04-25 | 南京信息职业技术学院 | Conformal antenna for cylindrical carrier and application method thereof |
| CN207098043U (en) * | 2017-07-11 | 2018-03-13 | 成都嘉晨科技有限公司 | The conformal array antenna of high-gain wave beam forming |
| CN108767466A (en) * | 2018-06-06 | 2018-11-06 | 合肥工业大学 | A kind of super wide band microstrip characteristics of conformal array antenna |
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