Millimeter Wave Array Antenna With Sloped Ground Plane
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Solution Overview
Problem
Millimeter wave band antennas face challenges in non-line-of-sight environments due to high signal attenuation and increased delay spread in multipath propagation, leading to significant SINR drops and the creation of shadow areas.
Innovation Solution
A millimeter wave array antenna design incorporating a first dipole array unit, a second dipole array unit, and a slot antenna unit with specific feed line configurations and phase differences to minimize shadow areas and delay spread, featuring orthogonal array directions and sloped ground plane structures to enhance beam steering and polarization properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If millimeter wave band antenna emits signals in a very narrow beam width to improve gains, then transmission capacity is improved, but shadow area increases
Solution Approach 1:
The antenna system is segmented into multiple antenna elements arranged in a grid pattern, allowing the beam to be divided and steered across multiple directions simultaneously, thereby reducing shadow areas while maintaining transmission capacity
Solution Approach 2:
The patent transitions from a single narrow beam in one direction to a three-dimensional beamforming capability by utilizing multiple antenna elements in both horizontal and vertical dimensions, enabling coverage expansion without sacrificing power
2Speed
If millimeter wave band antenna uses high frequency to provide higher bandwidth, then transmission speed is improved, but delay spread increases in multipath propagation environment
Solution Approach 1:
The antenna system dynamically adapts its beamforming characteristics based on the propagation environment, adjusting phase and amplitude weights in real-time to mitigate multipath effects and reduce delay spread while maintaining high transmission speeds
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 effectively minimizes shadow areas and prevents delay spread, improving signal quality and beam steering performance in diverse environments by emitting circularly polarized signals and optimizing antenna configurations.
Implementation Method 1
a first dipole array antenna unit including a multiple number of first +dipole members, which are formed on an upper portion of a first substrate and configured to be provided with feed signals through a first feed line
Implementation Method 2
the ground plane includes a first sloped structure, which has an upward slope of a first angle toward a rightward direction from a point of junction with a first −dipole member
Implementation Method 3
The third feed line and the fourth feed line may provide feed signals having a phase difference of 90 degrees, so that the slot radiators may emit circularly polarized signals
Data Source
AI summary
A millimeter wave band array antenna is disclosed. The disclosed antenna includes: a first dipole array antenna unit including first +dipole members, formed on an upper portion of a first substrate and provided with feed signals through a first feed line, and first −dipole members, formed on a lower portion of the first substrate and joined with a ground plane on a lower portion of the first substrate; and a slot antenna unit including slot radiators, which are formed on an upper portion of the first substrate, where the ground plane includes a first sloped structure having an upward slope of a first angle to the right from the point of junction with a first −dipole member and a second sloped structure having an upward slope of the first angle toward the left from the point of junction.