Single-station positioning antenna array and method for positioning in and near automobile

A technology for positioning antennas and single stations, which is applied to antenna arrays that are powered on independently, antenna arrays, and specific array feeding systems, etc. It can solve the problems of low positioning accuracy and poor single value of phase difference, and achieve strong multipath resistance , avoid positioning ambiguity and error, and ensure the effect of single value

Pending Publication Date: 2022-05-17
BEIHANG UNIV
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  • Abstract
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Problems solved by technology

[0006] The present invention aims at the problems of poor single-valued phase difference and low positioning accuracy of existing single-site positioning antennas, and provides a single-site positioning antenna array and method for positioning in and around automobiles, through the innovation of antenna layout and structure Design and obtain the positioning antenna whose phase pattern changes monotonously with the pitch angle, so as to ensure the single value of the phase difference during positioning, and use the method of combining UWB precise ranging and interferometer direction finding to achieve high-precision single-base station positioning

Method used

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  • Single-station positioning antenna array and method for positioning in and near automobile
  • Single-station positioning antenna array and method for positioning in and near automobile
  • Single-station positioning antenna array and method for positioning in and near automobile

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Embodiment 1

[0053] Taking the single-site positioning antenna array with a working frequency of 6.5GHz as an example, using the design method of the present invention, the distance D between the feeding points of the three microstrip antennas can be obtained as 30mm, and the side length W of the metal radiation patch is 14.6mm, the material of the dielectric substrate is Teflon, the height H is 2.68mm, and the radius R of the dielectric substrate is 35mm. The return loss of the antenna is as follows Figure 6 As shown, it can be seen that the working frequency band of the single-site positioning antenna array is 6.18 to 7.17 GHz, including the set working frequency 6.5 GHz, and can transmit ultra-wideband pulse signals exceeding 500 MHz. Such as Figure 7 As shown, the phase pattern of the antenna changes monotonously with the change of the pitch angle, which can ensure the uniqueness of the phase difference during positioning.

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Abstract

The invention provides a single-station positioning antenna array and method for positioning in and near an automobile, aiming at the problems of poor phase difference univaluity and low positioning precision of the existing single-station positioning antenna, and through innovative design of antenna layout and structure, a positioning antenna with a phase directional diagram monotonically changing along with a pitch angle is obtained. Therefore, the single-valued performance of the phase difference during positioning is ensured, and high-precision single-base-station positioning is realized by adopting a method of combining UWB accurate distance measurement and interferometer direction finding. The antenna array adopts a compact microstrip antenna structure, is very low in profile height, can be installed in a narrow space in a vehicle ceiling, can accurately position intelligent equipment inside and nearby a vehicle, and is very suitable for scenes such as the interior of the vehicle with small installation space and high positioning precision requirements.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a high-precision single-station positioning microstrip antenna array and method that combines an ultra-wideband (UWB) pulse ranging method and an interferometer direction-finding method, and has good uniqueness. Background technique [0002] With the development of electrification, intelligence, and networking of automobiles, users have an urgent need for precise positioning of electronic devices in and around the vehicle, such as smart keys and mobile phones. [0003] Existing commonly used positioning technologies include WiFi, Bluetooth, UWB, etc., but all have different defects. WiFi, Bluetooth and other technologies have high maturity and low cost, but their positioning accuracy is only 3m-10m, which cannot meet the needs of high-precision positioning in and around the vehicle. UWB technology has the characteristics of strong multipath resolution and high positioning accur...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H01Q1/38H01Q1/32H01Q1/48H01Q1/50H01Q21/00H01Q21/20G01S5/08G01S5/10G01S7/03G01S13/06
CPCH01Q1/38H01Q1/48H01Q1/50H01Q1/3275H01Q21/0006H01Q21/20G01S7/03G01S13/06G01S5/08G01S5/10
Inventor谢拥军孙万嘉戴乐根
OwnerBEIHANG UNIV