Quad-Polarized FDD Antenna Array for Spatial Beam Isolation
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Solution Overview
Problem
Conventional dual-polarized antenna modules face challenges in securing sufficient space for additional diplexers due to size constraints, leading to inadequate isolation and communication quality issues caused by beam correlation.
Innovation Solution
A quad-polarized antenna module array is introduced, featuring radiating elements with specific polarization directions and a filter unit, along with a phase setting module to separate beams in space, reducing beam correlation and improving space efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dual-polarized antenna modules are arranged with preset center-to-center distance to secure isolation and achieve optimal beamforming conditions, then communication quality is improved, but the required space increases making it difficult to arrange additional diplexers
Solution Approach 1:
The patent combines multiple dual-polarized antenna modules into a single quad-polarized antenna module that supports four polarization directions (±45° and V/H). This merging approach maintains the isolation and beamforming performance of separately arranged modules while reducing the overall space required, as the combined module integrates the functionality of multiple modules into one compact structure.
Solution Approach 2:
The quad-polarized antenna module serves multiple functions simultaneously by supporting four different polarization directions. This multi-functional design allows the single module to replace what would traditionally require multiple separate dual-polarized modules, each handling specific polarization directions, thereby reducing the total number of components and the space they occupy while maintaining communication quality.
2Reliability
If the diplexer size increases to secure skirt characteristic in narrow frequency bands, then frequency separation performance is improved, but the available space for arranging additional diplexers further decreases
Solution Approach 1:
The patent merges the functions of multiple diplexers into a single integrated filter unit within the quad-polarized antenna module. This combined filter unit handles frequency separation for all four polarization directions simultaneously, eliminating the need for multiple separate diplexers and the space they would require, while maintaining the necessary frequency separation performance through careful filter design.
3Area of stationary object
If beams are arranged in adjacent locations without spatial separation, then space efficiency is improved, but beam correlation increases causing communication quality deterioration
Solution Approach 1:
The patent applies local quality by assigning different polarization characteristics to different spatial regions within the quad-polarized antenna module. Each polarization direction (±45° and V/H) is associated with specific radiating elements positioned at optimized locations, creating localized beam patterns with distinct polarization properties. This approach enables spatial separation of beams through polarization differentiation, reducing beam correlation while maintaining compact dimensions.
Data Source
AI summary
Disclosed is a frequency-division duplexing (FDD) type antenna device for implementing spatial-polarization separation of beams using a quad-polarized antenna module array.There is provided an antenna device including first radiating elements, second radiating elements, third radiating elements, and fourth radiating elements, a filter unit including first, second, third, and fourth filters that filter signals of first, second, third, and fourth signal paths, respectively, and a phase setting module configured to set phases of the filtered signals so that a first beam and a second beam radiated through the first and second radiating elements and the third and fourth radiating elements, respectively, are separated in space, wherein the first beam and the second beam have different polarization directions.