UWB Antenna Array Layout for Compact Angle Measurement
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Solution Overview
Problem
Existing ultra-wideband (UWB) antenna solutions require large space due to their size and antenna spacing, making them unsuitable for use in terminals where space is limited, such as in mobile devices, due to the need for a half-wavelength phase center distance and large antenna size for effective angle measurement and ranging.
Innovation Solution
An ultra-wideband antenna array is designed with a first, second, and third antenna unit, where the distances between them are less than the distance between the first and second units, and the phase centers are deviated from the geometric centers, allowing for a more compact configuration while maintaining effective phase center distance for precise angle measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a half-wavelength patch antenna is used with phase center distance near half wavelength, then good angle measurement precision is obtained, but the occupied space becomes too large for terminal devices
Solution Approach 1:
The patent changes the antenna type from half-wavelength patch antenna to quarter-wavelength PIFA antenna, fundamentally altering the wavelength parameter (from λ/2 to λ/4) to reduce physical size while maintaining phase center distance requirements for accurate angle measurement
Solution Approach 2:
The patent transitions from a planar two-dimensional antenna layout to a three-dimensional stacked configuration with multiple layers, allowing antennas to be positioned vertically rather than horizontally, thereby reducing the horizontal occupied space while maintaining necessary phase center distances
2Area of stationary object
If antenna size and spacing are reduced to fit terminal devices, then occupied space is reduced, but angle measurement precision and ranging distance deteriorate
Solution Approach 1:
The patent uses quarter-wavelength PIFA antennas instead of half-wavelength patch antennas, changing the fundamental wavelength parameter to achieve the same electrical performance with half the physical size, thus maintaining measurement precision while reducing occupied space
Solution Approach 2:
The patent employs phase center deviation design where the phase centers are intentionally positioned away from the geometric centers of the antennas, creating a dynamic equivalent electrical distance that maintains measurement precision even when physical antenna spacing is reduced
Data Source
AI summary
This application discloses an ultra-wideband antenna array and an electronic device. The antenna array includes a first antenna unit, a second antenna unit, and a third antenna unit, where a first distance and a second distance are less than a third distance. The first distance is a distance between the first antenna unit and the third antenna unit, the second distance is a distance between the second antenna unit and the third antenna unit, and the third distance is a distance between the first antenna unit and the second antenna unit. Phase centers of the first antenna unit, the second antenna unit, and the third antenna unit are deviated from geometric centers.