Hybrid Multi-Band Antenna Array for Millimeter Wave
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Solution Overview
Problem
Current millimeter wave communication technologies face challenges in designing compact, highly integrated multi-band antenna arrays that can effectively operate across different frequency bands without suffering from grating lobe issues and mutual coupling effects, leading to inefficient space utilization and distorted radiation patterns.
Innovation Solution
A hybrid multi-band antenna array is designed, comprising a multilayer substrate board with a first antenna array of folded loop antennas and a second antenna array of parallel-connected slot antennas, where the antennas are strategically spaced to generate distinct resonant modes across different communication bands, reducing coupling interference and destructive interference in radiation patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different beamforming antenna arrays are designed for different millimeter wave bands with optimized array unit intervals, then grating lobe problems are suppressed and radiation patterns are improved, but mutual coupling effects cause distortion and larger placement space is required
Solution Approach 1:
The patent combines multiple beamforming antenna arrays for different millimeter wave bands into a single integrated array structure. By merging the arrays and optimizing the array unit intervals to satisfy specific mathematical relationships (d ≤ λ₁/2 and d ≤ λ₂/2), the design suppresses grating lobe problems while maintaining compact placement space, thereby resolving the contradiction between radiation pattern quality and space requirements.
Solution Approach 2:
The patent changes the array unit interval parameter to satisfy specific constraints (d ≤ λ₁/2 and d ≤ λ₂/2) that simultaneously prevent grating lobe issues and reduce mutual coupling effects. By carefully controlling this geometric parameter, the design achieves both high radiation pattern quality and compact space utilization without requiring separate arrays with isolation distances.
2Area of stationary object
If a single antenna array is designed to excite wide band resonant mode to cover different communication bands, then space utilization is improved, but grating lobe problems occur in different frequency bands
Solution Approach 1:
The patent changes the array unit interval parameter to satisfy specific constraints (d ≤ λ₁/2 and d ≤ λ₂/2) that simultaneously prevent grating lobe issues and reduce mutual coupling effects. By carefully controlling this geometric parameter, the design achieves both high radiation pattern quality and compact space utilization without requiring separate arrays with isolation distances.
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 hybrid antenna array achieves compact size, high integration, and multi-band operation, ensuring efficient data throughput and effective radiation patterns across various frequency bands without significant space or performance compromises.
Implementation Method 1
each folded loop antenna includes a meandered metal resonant path, each meandered metal resonant path has a loop shorting point and a loop feeding point, and the first antenna array is excited to generate a first resonant mode covering at least one first communication band
Implementation Method 2
each parallel-connected slot antenna includes a first slot, a second slot and a signal coupling line extending across the first slot and the second slot, and the second antenna array is excited to generate a second resonant mode covering at least one second communication band
Implementation Method 3
each of the folded loop antennas includes a meandered metal resonant path
Implementation Method 4
each of the parallel-connected slot antennas includes a first slot, a second slot and a signal coupling line extending across the first slot and the second slot
Data Source
AI summary
Provided is a hybrid multi-band antenna array, including: a multilayer substrate board including a ground conductor structure having a first edge; a first antenna array including a plurality of folded loop antennas, all of which being integrated with the multilayer substrate board and arranged along the first edge sequentially, wherein the first antenna array is excited to generate a first resonant mode covering at least one first communication band; and a second antenna array including a plurality of parallel-connected slot antennas, all of which being integrated with the multilayer substrate board and arranged along the first edge sequentially, wherein the second antenna array is excited to generate a second resonant mode covering at least one second communication band, and a frequency of the second resonant mode is lower than a frequency of the first resonant mode.