CN108258387B - Vehicle-mounted equipment antenna with closed-loop structure - Google Patents
Vehicle-mounted equipment antenna with closed-loop structure Download PDFInfo
- Publication number
- CN108258387B CN108258387B CN201611237835.4A CN201611237835A CN108258387B CN 108258387 B CN108258387 B CN 108258387B CN 201611237835 A CN201611237835 A CN 201611237835A CN 108258387 B CN108258387 B CN 108258387B
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- coaxial cable
- loop structure
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Classifications
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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
-
- 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
-
- 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
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
Abstract
The invention provides a vehicle-mounted equipment antenna with a closed-loop structure, which has the characteristics that: a coaxial cable; an antenna radiating portion connected to the coaxial cable; and a ground portion provided on the coaxial cable, provided adjacent to the antenna radiation portion, wherein the antenna radiation portion has: the microstrip transmission line is arranged at the lower side of the antenna radiation part and is connected with the coaxial cable; the rectangular closed ring is arranged around the antenna radiation part and is connected with the microstrip transmission line; a first branch disposed inside the rectangular closed ring; the second branch is arranged inside the rectangular closed ring and is symmetrically arranged with the first branch; a third branch disposed between the first branch and the second branch; and a fourth branch arranged between the first branch and the second branch and symmetrically arranged with the third branch, wherein the grounding part has a U-shaped structure and is distributed on two sides of the microstrip transmission line.
Description
Technical Field
The present invention relates to an antenna, and more particularly, to a closed-loop antenna for a vehicle-mounted device.
Background
In recent years, with the continuous departure of global Internet of vehicles standards, the advent of the large age of intelligent Internet of vehicles is coming. The intelligent network-connected automobile is used as a next-generation automobile, is finally integrated into a vehicle-mounted information terminal device through carrying complex devices such as a sensor, a controller and an actuator, and is integrated with modern communication and network technology, so that intelligent information exchange sharing among the automobile, people, the automobile, roads and the Internet is realized, and the intelligent network-connected automobile has the functions of complex environment perception, intelligent decision, cooperative control and execution and the like, can realize safe, comfortable, energy-saving and efficient running, and finally aims to replace people to control the automobile.
With the increasing number of internet of vehicles devices, hardware functional integration is a big direction. Besides the traditional AM/FM analog broadcasting signals, satellite navigation, digital broadcasting/television, bluetooth, wiFi,3G/4G/5G, car2X (X comprises man/car/road/cloud) communication and the like, and each system occupies different frequency bands. The antenna is used as the only carrier of the information exchange path, and the requirement of the coverage frequency range is also improved. The prior vehicle-mounted antenna mostly adopts a system and is matched with an antenna, obviously, the system is not in line with the development trend, and the antenna integrating a plurality of frequency bands is only in the development direction.
Disclosure of Invention
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vehicle-mounted device antenna of a closed-loop structure having a compact structure and a wide frequency band.
The invention provides a vehicle-mounted equipment antenna with a closed-loop structure, which has the characteristics that: a coaxial cable; an antenna radiating portion connected to the coaxial cable; and a ground portion provided on the coaxial cable, provided adjacent to the antenna radiation portion, wherein the antenna radiation portion has: the microstrip transmission line is arranged at the lower side of the antenna radiation part and is connected with the coaxial cable; the rectangular closed ring is arranged around the antenna radiation part and is connected with the microstrip transmission line; a first branch disposed inside the rectangular closed ring; the second branch is arranged inside the rectangular closed ring and is symmetrically arranged with the first branch; a third branch disposed between the first branch and the second branch; and a fourth branch arranged between the first branch and the second branch and symmetrically arranged with the third branch, wherein the grounding part has a U-shaped structure and is distributed on two sides of the microstrip transmission line.
The vehicle-mounted equipment antenna with the closed-loop structure provided by the invention has the following characteristics: the rectangular closed ring is divided into a first frame, a second frame, a third frame and a fourth frame, the first frame, the second frame, the third frame and the fourth frame are connected end to form a closed loop, the rectangular closed ring forms low-frequency resonance, and the frequency range covers GPS/GNSS/Beidou.
The vehicle-mounted equipment antenna with the closed-loop structure provided by the invention has the following characteristics: the first branch is connected with the second frame, the second branch is connected with the fourth frame, and the first branch and the second branch adopt L-shaped wiring to form 2.4GHz antenna resonance.
The vehicle-mounted equipment antenna with the closed-loop structure provided by the invention has the following characteristics: the third branch and the fourth branch are connected with the third frame, the distance between the two connecting points is adjustable, and the third branch and the fourth branch adopt I-shaped wiring to form 5GHz antenna resonance.
The vehicle-mounted equipment antenna with the closed-loop structure provided by the invention has the following characteristics: the horizontal distance and the vertical overlapping length between the first branch and the third branch as well as between the second branch and the fourth branch can adjust the coupling degree, and the 3.5GHz antenna resonance is formed.
The vehicle-mounted equipment antenna with the closed-loop structure provided by the invention has the following characteristics: wherein, the distance between the microstrip transmission line and the grounding part can adjust the characteristic impedance.
The vehicle-mounted equipment antenna with the closed-loop structure provided by the invention has the following characteristics: wherein, coaxial cable has: an inner conductor; a dielectric layer; and the shielding layer, the inner conductor, the dielectric layer and the shielding layer are sequentially arranged, the microstrip transmission line is connected with the inner conductor of the coaxial cable, the grounding part is connected with the shielding layer of the coaxial cable, the length of the coaxial cable is adjustable, and the external interface mode is selected.
The vehicle-mounted equipment antenna with the closed-loop structure provided by the invention has the following characteristics: wherein, adopt the PCB substrate, install on the plane body with the screw.
The vehicle-mounted equipment antenna with the closed-loop structure provided by the invention has the following characteristics: wherein, adopt the PCB substrate, install on the plane body with the gum.
The vehicle-mounted equipment antenna with the closed-loop structure provided by the invention has the following characteristics: wherein, adopt FPCB substrate, install with the gum, paste on same camber cambered surface.
Effects of the invention
According to the vehicle-mounted equipment antenna with the closed-loop structure, the coaxial cable end face is adopted for feeding, the coaxial cable external interface can be flexibly changed according to the requirements of terminal equipment, the antenna adopts the closed rectangular monopole and different branches to realize broadband coverage, the working frequency band comprises a global main satellite positioning system GPS/GNSS/Beidou, wiFi2.4GHz/5GHz/WiMAX3.5GHz and the like, and the ultra-wide frequency band antenna is realized in a space as small as possible by integrating different branches into the rectangular closed-loop monopole, so that the antenna can be fully applied to vehicle-mounted equipment with compact space.
Drawings
Fig. 1 is a schematic structural view of an in-vehicle apparatus antenna of a closed loop structure in an embodiment of the present invention; and
fig. 2 is a schematic diagram of return loss of an antenna for a vehicle-mounted device in a closed-loop structure in an embodiment of the present invention.
Detailed Description
The following describes in detail an in-vehicle device antenna of a closed loop structure according to the present invention with reference to the drawings and embodiments.
Fig. 1 is a schematic structural view of an in-vehicle apparatus antenna of a closed loop structure in an embodiment of the present invention.
As shown in fig. 1, an in-vehicle device antenna of a closed-loop structure has: a coaxial cable 10, an antenna radiating portion 20 and a ground portion 30.
The coaxial cable 10 is adjustable in length, flexible in external interface mode, and has: an inner conductor 101, a dielectric layer 102 and a shielding layer 103.
The antenna radiation portion 20 is connected to the coaxial cable 10, and has: microstrip transmission line 201, rectangular closed loop, first branch 206, second branch 207, third branch 208, and fourth branch 209.
The microstrip transmission line 201 is provided at the lower side of the antenna radiation portion 20, connected to the coaxial cable 10;
the rectangular closed loop is arranged around the antenna radiation portion 20 and connected with the microstrip transmission line 201, and different high-frequency bands can be expanded by adding different branches in the closed loop. The rectangular closure is divided into a first frame 202, a second frame 203, a third frame 204 and a fourth frame 205, which are connected end to form a closed loop, i.e. a monopole loop antenna. The rectangular closed loop forms a low frequency resonance, the frequency range covers GPS/GNSS/beidou, the gap between the first frame 202 and the ground part 30 is adjustable, and the distance proposal is not less than 1mm, in this embodiment set to 1mm.
The first branch 206 is disposed inside the rectangular closed loop, the second branch 207 is disposed inside the rectangular closed loop, symmetrically disposed with respect to the first branch 206, the third branch 208 is disposed between the first branch 206 and the second branch 207, and the fourth branch 209 is disposed between the first branch 206 and the second branch 207, symmetrically disposed with respect to the third branch 208.
The first branch 206 is connected to the second frame 203 and the second branch 207 is connected to the fourth frame 205. The first branch 206 and the second branch 207 adopt L-shaped wires to form a 2.4GHz antenna resonance.
The third branch 208 and the fourth branch 209 are both connected to the third frame 204, and the distance between the two connection points is adjustable. The third branch 208 and the fourth branch 209 adopt I-shaped wiring to form 5GHz antenna resonance.
The horizontal distance and the vertical overlapping length between the first branch 206 and the third branch 208, and the second branch 207 and the fourth branch 209 can adjust the coupling degree, so as to form the 3.5GHz antenna resonance.
The ground portion 30 is provided on the coaxial cable 10, adjacent to the antenna radiating portion 20. The grounding part 30 is of a U-shaped structure and is distributed on two sides of the microstrip transmission line 201, and the characteristic impedance can be adjusted by the distance between the microstrip transmission line 201 and the grounding part 30.
The antenna for the vehicle-mounted device adopts an end-feed mode, the microstrip transmission line 201 is connected to the coaxial cable inner conductor 101, and the ground portion 30 is connected to the shield layer 103 of the coaxial cable.
The vehicle-mounted device antenna adopts a PCB substrate or an FPCB substrate. The PCB substrate is screwed or glued to the planar body. The FPCB substrate is mounted by back glue and is adhered on the same curvature cambered surface.
Fig. 2 is a schematic diagram of return loss of an antenna for a vehicle-mounted device in a closed-loop structure in an embodiment of the present invention.
As shown in FIG. 2, the return loss parameters of the vehicle-mounted equipment antenna in the resonance frequency bands of 1560 MHz-1605 MHz,2400 MHz-2500 MHz,3400 MHz-3600 MHz and 5150 MHz-5850 MHz can be basically below-7 dB, thereby completely meeting the requirements of practical use.
Effects and effects of the examples
According to the vehicle-mounted equipment antenna with the closed-loop structure, coaxial cable end face feeding is adopted, an external interface of the coaxial cable can be flexibly changed according to requirements of terminal equipment, the antenna adopts a closed rectangular monopole and different branches to achieve broadband coverage, an operating frequency band comprises a global main satellite positioning system GPS/GNSS/Beidou, wiFi2.4GHz/5GHz/WiMAX3.5GHz and the like, and the ultra-wide frequency band antenna is achieved in a space as small as possible by integrating different branches into the rectangular closed-loop monopole, so that the antenna can be fully applied to vehicle-mounted equipment with compact space.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (7)
1. A vehicle-mounted device antenna of a closed-loop structure, characterized by comprising:
a coaxial cable;
an antenna radiating portion connected to the coaxial cable; and
a ground portion disposed on the coaxial cable, disposed adjacent to the antenna radiating portion, wherein the antenna radiating portion has:
a microstrip transmission line disposed at a lower side of the antenna radiation portion and connected to the coaxial cable;
a rectangular closed ring arranged around the antenna radiation part and connected with the microstrip transmission line;
a first branch disposed inside the rectangular closed ring;
the second branch is arranged inside the rectangular closed ring and is symmetrically arranged with the first branch;
a third branch disposed between the first branch and the second branch; and
a fourth branch arranged between the first branch and the second branch and symmetrically arranged with the third branch,
the grounding part is of a U-shaped structure and is distributed on two sides of the microstrip transmission line;
wherein the rectangular closed ring is divided into a first frame, a second frame, a third frame and a fourth frame which are connected end to form a closed loop,
the rectangular closed ring forms low-frequency resonance, and the frequency range covers GPS/GNSS/Beidou;
wherein the first branch is connected with the second frame,
the second branch is connected with the fourth frame,
the first branch and the second branch adopt L-shaped wiring to form 2.4GHz antenna resonance;
wherein the third branch and the fourth branch are connected with the third frame, the distance between the two connecting points is adjustable,
and the third branch and the fourth branch adopt I-shaped wiring to form 5GHz antenna resonance.
2. The in-vehicle apparatus antenna of a closed loop structure according to claim 1, characterized in that:
the horizontal distance and the vertical overlapping length between the first branch and the third branch as well as between the second branch and the fourth branch can adjust the coupling degree, so that the 3.5GHz antenna resonance is formed.
3. The in-vehicle apparatus antenna of a closed loop structure according to claim 1, characterized in that:
wherein, the distance between the microstrip transmission line and the grounding part can adjust the characteristic impedance.
4. The in-vehicle apparatus antenna of a closed loop structure according to claim 1, characterized in that:
wherein the coaxial cable has: an inner conductor; a dielectric layer; and a shielding layer, wherein the inner conductor, the dielectric layer and the shielding layer are sequentially arranged,
the microstrip transmission line is connected with the coaxial cable inner conductor,
the ground portion is connected to a shield of the coaxial cable,
the coaxial cable is adjustable in length, and the external interface mode is selected.
5. The in-vehicle apparatus antenna of a closed loop structure according to claim 1, characterized in that:
wherein, adopt the PCB substrate, install on the plane body with the screw.
6. The in-vehicle apparatus antenna of a closed loop structure according to claim 1, characterized in that:
wherein, adopt the PCB substrate, install on the plane body with the gum.
7. The in-vehicle apparatus antenna of a closed loop structure according to claim 1, characterized in that:
wherein, adopt FPCB substrate, install with the gum, paste on same camber cambered surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611237835.4A CN108258387B (en) | 2016-12-28 | 2016-12-28 | Vehicle-mounted equipment antenna with closed-loop structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611237835.4A CN108258387B (en) | 2016-12-28 | 2016-12-28 | Vehicle-mounted equipment antenna with closed-loop structure |
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| Publication Number | Publication Date |
|---|---|
| CN108258387A CN108258387A (en) | 2018-07-06 |
| CN108258387B true CN108258387B (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611237835.4A Active CN108258387B (en) | 2016-12-28 | 2016-12-28 | Vehicle-mounted equipment antenna with closed-loop structure |
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| JP2009060568A (en) * | 2007-08-03 | 2009-03-19 | Toyota Motor Corp | Multiple-resonance antenna |
| KR20090096914A (en) * | 2008-03-10 | 2009-09-15 | (주)디지탈테크 | Planar type folded monopole antenna |
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| CN103618136A (en) * | 2013-11-07 | 2014-03-05 | 中国计量学院 | Ring-encircled wideband coplanar antenna |
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| Publication number | Publication date |
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| CN108258387A (en) | 2018-07-06 |
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Effective date of registration: 20180723 Address after: 200444 two floor, 8 powerhouse, 611 Po Qi Road, Baoshan District, Shanghai. Applicant after: SHANGHAI SAINTENNA WIRELESS TECHNOLOGY Co.,Ltd. Address before: 201900 room 218, No. 68, Baoshan District Road, Shanghai Applicant before: SHANGHAI SAINTENNA ELECTRONIC TECHNOLOGY CO.,LTD. |
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