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An antenna

An antenna and the same technology are applied in the field of coplanar broadband antennas, which can solve the problems of increased test time, high price, and inability to guarantee after-sales maintenance, and achieve the effect of increasing frequency bandwidth and facilitating production

Active Publication Date: 2018-12-11
FAW VOLKSWAGEN AUTOMOTIVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the latest EMC testing standards, the method of using handheld mobile devices for vehicle electromagnetic compatibility testing (ie radiation immunity testing) has been included. However, the handheld mobile devices currently used for testing single pieces of equipment The antenna of the device is not suitable for the whole vehicle test due to its large size; although the foreign test antenna is suitable for the whole vehicle test, it is expensive, and after-sales maintenance cannot be guaranteed, and at least three antennas are required to cover the entire test frequency band. It will greatly increase the test time and affect the test efficiency

Method used

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Embodiment 1

[0034] refer to figure 1 or figure 2 , an antenna provided in this embodiment is used for a handheld mobile device for vehicle electromagnetic compatibility testing, and the antenna includes a substrate 1, a central conductor and a ground plane.

[0035] Both the central conductor and the ground plane are fixed on the same bonding surface of the substrate 1 by means of etching, so that the central conductor and the ground plane are in the same plane, forming a coplanar antenna. Since the antenna provided in this embodiment adopts a coplanar structure, the working bandwidth of the antenna is effectively increased. In the frequency range of 1-3GHz, the impedance of the central conductor (i.e., the port impedance of the antenna) does not change much with frequency, and is always close to 50Ω, therefore, one antenna provided in this embodiment can cover electromagnetic waves in the 1-3GHz frequency band.

[0036] The central conductor includes an integrally formed feed unit 202...

Embodiment 2

[0038] see figure 1 , figure 2 or image 3, an antenna provided in this embodiment, the radiation unit 201 of the antenna is hexagonal, the P3 point is located directly above the P0 point, and the P0 point, P3 point and the feeding unit 201 are located on the same vertical line, and the P1 point, P1' Points are horizontally symmetrically distributed with respect to the vertical lines where P0 and P3 are located, and P2 and P2' are horizontally symmetrically distributed with respect to the vertical lines where P0 and P3 are located; in addition, P1, P1', P2, P2', P3 The points are all above the point P0, the height of the point P3 is between the points P1 and P2, and the distance between P0 and P1 is smaller than the distance between the points P2 and P3. In antenna theory, if the radiating unit 202 is to be symmetrical, it needs at least a pentagon, but the pentagon will make the radiating unit lack an optimal parameter, so the present invention adopts the hexagonal design,...

Embodiment 3

[0046] read on figure 1 , the antenna further includes an SMA port 4 , the feed point of the SMA port 4 is connected to the feed unit 202 , and the ground leg of the SMA port 4 is connected to the first ground plane 301 and the second ground plane 302 . The first ground plane 301 and the second ground plane 302 are two right-angled trapezoids that are horizontally symmetrical with respect to the feed unit 202, respectively marked as the right-angled trapezoid ABCD and the right-angled trapezoid A'B'C'D', because the right-angled trapezoid ABCD and the right-angled trapezoid The trapezoid A'B'C'D' is symmetrical about the feed unit 202, so the size and shape of the ground plane will only be described below through the right-angled trapezoid ABCD, wherein the side CD of the first ground plane 301 is parallel to and adjacent to the feed unit 202 and Leave a gap, the gap width W2 is 0.1-0.3mm, the CD side length L6 is 63.5-63.9mm, the AD side is flush with the bottom of the substr...

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Abstract

The invention discloses an antenna, which is used for the handheld mobile equipment of the whole vehicle electromagnetic compatibility test. The antenna comprises a base plate, a center conductor anda ground plane, wherein, the center conductor and the ground plane are fixed on the same bonding surface of the base plate and are in the same plane, and the radiating unit of the center conductor ishexagonal. The antenna is small in size, mounted on handheld mobile devices for vehicle EMC testing, which can be conveniently placed beside the device under test in the vehicle, As that antenna coverthe whole test frequency band, the t time is greatly reduced, the working efficiency is improved, the test cost is reduce, and the problem that the antenna is not suitable for the whole vehicle testdue to the large size or requires at least three antennas to cover the whole test frequency band is solved.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a coplanar broadband antenna. Background technique [0002] With the increasing complexity of the electromagnetic environment faced by automobiles, the electromagnetic compatibility problem of automobiles has become more and more prominent and serious. On the one hand, the daily use of automobiles is subject to more and more external electromagnetic interference, such as communication equipment, power equipment, radio broadcasting, etc. in the surrounding environment; on the other hand, more and more electronic and electrical equipment are installed on automobiles. When electronic and electrical equipment is working, it will not only generate electromagnetic interference to other vehicle-mounted electronic and electrical equipment around it, but also be affected by electromagnetic interference from other vehicle-mounted electronic and electrical equipment around it. [0003] In the lates...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q1/24
CPCH01Q1/243H01Q1/38H01Q1/48H01Q1/50
Inventor 王骞岍吴定超张宏宇曹召
Owner FAW VOLKSWAGEN AUTOMOTIVE CO LTD
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