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Vehicle antenna design method

A vehicle-mounted antenna and design method technology, applied to antennas, antenna grounding switch structure connection, suitable for antennas on movable objects, etc., can solve the problems of not being able to meet the needs of inter-vehicle communication, affecting the appearance, and narrow working bandwidth. Achieve the effect of realizing double-harmonic broadband matching working characteristics, low production cost and simple structure

Inactive Publication Date: 2017-11-07
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

The monopole antenna has omni-directional coverage characteristics with high gain, but the cross-sectional size is large, and it is abrupt on the surface of the car body, which affects the appearance and is easy to damage
The patch antenna has high gain and low profile, but its working bandwidth is narrow and its beam is sharp. It usually presents a radiation zero point in the direction parallel to the vehicle body, which cannot meet the needs of inter-vehicle communication; the profile size of the inverted L or inverted F antenna is between the above two Between the two, it has omnidirectional coverage characteristics with a medium operating bandwidth, but only a low radiation level in the direction parallel to the vehicle body

Method used

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  • Vehicle antenna design method
  • Vehicle antenna design method
  • Vehicle antenna design method

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0022] The invention provides a design method of a vehicle-mounted antenna. By designing a short-circuit radiation unit with a superior angle structure above a metal reflector, and introducing a symmetrical slotted structure inside, the simultaneous excitation of low-order and high-order resonance modes is realized. , to achieve double-harmonic broadband matching characteristics. In the present invention, the metal reflector can be installed on the surface of the vehicle body, or embedded in the vehicle body by opening a window, and connected with the vehicle body through the metal window frame structure. The antenna of the present invention produces a coverage gain not lower than -6dBi in the direction parallel to the vehicle body (that is, the direction parallel to the metal reflector); in its radiation main lobe, the antenna elevation plane and ...

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Abstract

The present invention discloses a vehicle antenna design method, and belongs to the microwave and antenna technology field. A short-circuit radiation unit having a reflex angle structure is designed on the upper portion of a metal reflector, and a symmetrical slot structure is introduced at the internal portion of the metal reflector to realize simultaneous excitation of low-order and high-order resonant modes and realize double harmonic matching features. The metal reflector can be installed at the surface of the vehicle body and also can be embedded into the vehicle body in a windowing mode to be connected with the vehicle body through a metal window frame structure, and coverage gain of being not lower than -6dBi is generated on the direction being parallel to the vehicle body. The internal portion of a radiation main lobe, the antenna pitching surface and the azimuth plane all have uniform coverage features having fluctuation of being not larger than 12dB.

Description

technical field [0001] The invention relates to a design method of a vehicle-mounted antenna, belonging to the technical field of microwaves and antennas. Background technique [0002] Various antennas installed on the surface of high-speed moving vehicles (or ships, aircraft, spacecraft, etc.) can generally be collectively referred to as "vehicle antennas" in a broad sense. Some salient features of this type of antenna include: (1) there is a large area of ​​metal vehicle (or ship, ship, aircraft, star) around the antenna; (2) the antenna has a wide elevation beam and azimuth beam, so that Fully capture the scattering components from different directions and overcome the fading of wireless signals; (3) In order to meet the communication between vehicles, the antenna is required to maintain a sufficient radiation level in the direction parallel to the metal car body. [0003] The commonly used vehicle antenna forms include monopole antenna, patch antenna, inverted L or inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/28H01Q1/32H01Q1/34H01Q1/36H01Q1/50H01Q19/10
CPCH01Q1/28H01Q1/32H01Q1/34H01Q1/36H01Q1/50H01Q19/10
Inventor 吕文俊李晴王生光
Owner NANJING UNIV OF POSTS & TELECOMM