2D Receiving Antenna Array for Balanced Radar Resolution
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Solution Overview
Problem
Conventional radar devices face challenges in achieving detection range and resolution in the vertical direction equivalent to those in the horizontal direction, particularly when detecting multiple objects, and are limited in antenna gain due to spacing requirements for radio wave wavelengths.
Innovation Solution
A radar device with a receiving antenna array arranged at different positions in both horizontal and vertical directions, where adjacent element antennas maintain equal distances in each direction, allowing for increased flexibility in antenna shape and gain, enabling detection in both horizontal and vertical directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large number of receiving antennas are arranged at equal intervals in the horizontal direction to obtain detection resolution, then detection resolution in the horizontal direction is improved, but the detection range and detection resolution in the vertical direction remain insufficient
Solution Approach 1:
The patent transitions from a one-dimensional horizontal antenna arrangement to a two-dimensional arrangement by adding vertical direction elements. The receiving antenna includes multiple element antennas arranged in both horizontal and vertical directions, enabling the radar to achieve detection resolution and range in both dimensions simultaneously, thus resolving the limitation of conventional horizontal-only arrangements
2Measurement precision
If antennas are arranged at intervals of about 1/2 wavelength to obtain separation ability in vertical direction, then detection resolution is improved, but antenna gain cannot be increased by connecting in parallel
Solution Approach 1:
The receiving antenna is segmented into multiple element antennas arranged in a two-dimensional configuration. This segmentation allows each element to be positioned at appropriate intervals (about 1/2 wavelength) to achieve vertical separation ability, while the collective array of segmented elements provides increased antenna gain through parallel connection, resolving the contradiction between resolution and gain
3Measurement precision
If element antennas are arranged in a regular grid pattern with equal distances in both directions, then detection resolution in vertical and horizontal directions becomes equivalent, but the degree of freedom in antenna shape design is reduced
Solution Approach 1:
The patent employs a regular grid arrangement where element antennas are positioned at equal intervals in both horizontal and vertical directions. This local uniformity ensures equivalent detection resolution in both directions, while the overall two-dimensional grid structure provides sufficient design flexibility to achieve desired antenna patterns and gain characteristics, balancing resolution equivalence with design freedom
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
The solution achieves detection resolution in the vertical direction comparable to the horizontal direction, enhancing the radar device's ability to detect multiple objects and increasing the degree of freedom in antenna design for desired gain and range.
Implementation Method 1
a radar device includes: a transmitting antenna having at least one element antenna; and a receiving antenna having a plurality of element antennas
Data Source
AI summary
A radar device includes: a transmitting antenna having at least one element antenna; and a receiving antenna having a plurality of element antennas. The plurality of element antennas of the receiving antenna are arranged at different positions in a first direction and a second direction perpendicular to the first direction. A distance between two adjacent element antennas among the plurality of element antennas of the receiving antenna in the first direction is equal to each other. A distance between two adjacent element antennas among the plurality of element antennas of the receiving antenna in the second direction is equal to each other.