Phased-Array Radar Layout for Wide-Angle Object Localization
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Solution Overview
Problem
Radar devices with planar phased-array antennas face challenges in maintaining gain and detection distance when receiving radio waves from directions away from the normal plane, and existing configurations struggle to orient transmission and receiving antennas simultaneously for effective location estimation in wide areas.
Innovation Solution
A radar device employing one or more linear array antennas that transmit and receive reflected waves, utilizing time and frequency differences to estimate object location, with the ability to orient antennas for maximum gain and extended detection distance by controlling the phase of transmitting and reflected waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a planar phased-array antenna is used, then the antenna structure is simple and cost performance is improved, but the gain decreases and detection distance shortens when receiving radio waves from directions away from the normal plane
Solution Approach 1:
The patent transitions from a two-dimensional planar array to a three-dimensional spherical array configuration. The spherical array distributes antenna elements across multiple poles (typically eight poles spaced 45 degrees apart), enabling the system to maintain high gain across a wide solid angle while preserving structural simplicity through modular deployment.
2Measurement precision
If separate transmitting and receiving antennas are used to orient both for maximum gain, then the detection precision is improved, but the device complexity increases
Solution Approach 1:
The spherical array antenna system is designed to perform both transmission and reception functions using the same antenna elements. The system can selectively activate different antenna elements for transmission while using other elements for reception, or simultaneously perform both functions through time-division or frequency-division multiplexing, eliminating the need for separate dedicated transmitting and receiving antenna systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables instantaneous location estimation in wide areas with increased gain and detection distance, simplifying the antenna structure and improving cost performance by allowing simultaneous transmission and reception without the need for additional antennas.
Implementation Method 1
An array antenna is usable as a phased-array antenna by being configured to be able to control a phase of a radio wave transmitted and received by an antenna element, the phased array antenna being capable of performing a process of changing a direction of the array antenna by controlling the phase of the radio wave transmitted and received
Implementation Method 2
a process of at least the one or more linear array antenna receiving a reflected wave, the reflected wave being generated by a transmitting wave illuminating an observed object
Data Source
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AI summary
[Problems to be Solved] To provide a radar device that is able to instantly detect a location of an observed object by using a phased-array antenna capable of receiving a reflected wave from all directions. [Solution] A radar device 1 of the present invention includes one or more linear array antennae 4 and a controller 2, in which the controller 2 is able to perform a process of at least the one or more linear array antennae transmitting a transmitting wave T; a process of at least the one or more linear array antennae 4 receiving a reflected wave R, at least the one or more linear array antennae 4 being the same as and/or different from the linear array antenna 4 that transmits the transmitting wave T and the reflected wave R being generated by the transmitting wave T illuminating an observed object; and a process of instantly estimating a location of the observed object by using time from transmission of the transmitting wave T to reception of the reflected wave R, and a direction of the transmitting wave and/or by using a frequency of the transmitting wave and a frequency of the reflected wave, and the direction of the transmitting wave.