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Microstrip phased array antenna applied on ETC terminal information acquisition system

A phased array antenna and acquisition system technology, which is applied in the directions of antenna arrays, antennas, and electrical components that are energized separately, can solve the problems of inability to form side-shooting arrays, unfavorable system implementation, and large side-by-side operations, so as to improve the identification distance and The effect of identifying success rate, enriching detection functions, and reducing construction costs

Inactive Publication Date: 2017-03-22
RES INST OF HIGHWAY MINIST OF TRANSPORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Without 0°, it is impossible to form a side-fire array
[0004] 2. The phase of ±135° will introduce too large side effects, which is not conducive to system realization

Method used

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  • Microstrip phased array antenna applied on ETC terminal information acquisition system
  • Microstrip phased array antenna applied on ETC terminal information acquisition system
  • Microstrip phased array antenna applied on ETC terminal information acquisition system

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Embodiment Construction

[0017] The present invention uses standard one-way three-lane lanes as a typical application scenario in the free-flow environment of the expressway, and combines the attenuation margin of the current ETC system to determine some design parameters of the phased array antenna. According to the "Highway Engineering Technical Standard JTG B01-2014" standard, the width of a single lane is 3.75 meters, and the span of three lanes is 11.25 meters. Set up a gantry with a net height greater than 5.5 meters at the detection section. Vehicles in each lane travel along the centerline of the lane. The phased array antenna is installed directly above the centerline of the middle lane, and the projection of the normal direction of the antenna is on the centerline of the middle lane.

[0018] According to the design indicators of the above application scenarios, refer to GB / T 20851-2007 "Short-range Communications for Electronic Toll Collection", and determine the technical indicators of th...

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Abstract

The invention discloses a microstrip phased array antenna applied on an ETC terminal information acquisition system. The microstrip phased array antenna comprises the following three parts: a feeding network which is composed of an RF switch, a crossover and a power divider and is used for distributing signals with different powers and different phases to different ports of a Butler matrix and inputting the signal to a preset port in switching; a wave beam forming network which is composed of improved Butler matrixes and is used for generating the signal with the required phase and inputting to a preset antenna unit; an antenna array, wherein each antenna unit is composed of double radiation sheets with a 90-DEG phase difference. The antenna is mounted right above the middle line of a middle lane. The projection of the antenna in the normal line direction is in the middle line of the middle lane. The microstrip phased array antenna can settle technical problems of wave beam scanning, lane identification, identification distance increase, identification success rate increase, etc.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a microstrip phased array antenna based on a novel Butler matrix technology applied to an ETC terminal information collection system. Background technique [0002] In the traditional 4×4 Butler matrix, when input from different ports, adjacent input ports can produce phase differences of ±45° and ±135°. Beam pointing control can be realized by microwave switch. The traditional Butler matrix has the following disadvantages: [0003] 1. Without 0°, it is impossible to form a side-fire array. [0004] 2. The phase of ±135° will introduce too large side effects, which is not conducive to system realization. Contents of the invention [0005] The purpose of the present invention is to provide a microstrip phased array antenna applied to the ETC terminal information collection system to solve the technical problems of beam scanning and lane recognition, and improve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/06H01Q23/00H01Q3/26
CPCH01Q21/06H01Q3/26H01Q23/00
Inventor 赵佳海
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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