Broadband Dual Antenna System Sharing Radiating Branches
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dual antenna integrated designs face challenges in achieving wide-band response and high isolation due to the need for increased complexity and cost with lumped elements, and limited integration due to separate structures, especially in meeting 5G NR spectrum specifications.
Innovation Solution
A broadband dual antenna system design that shares radiating metal branches for miniaturization and uses multi-mode integration with a coupling metal branch to enhance isolation, achieving wide-band operation and compliance with 5G NR n77/78/79 spectrum specifications by combining high and low frequency resonance modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lumped elements (resistive or capacitive) are added between dual antennas to solve isolation problems, then isolation is improved, but device complexity and cost increase
Solution Approach 1:
The patent removes the lumped elements (resistive or capacitive elements) from the antenna structure entirely. Instead of adding isolation components between the antennas, the design uses the inherent properties of the shared radiating metal branches and coupling structures to achieve the required isolation performance, thereby eliminating the complexity and cost associated with lumped elements.
Solution Approach 2:
The shared radiating metal branches serve multiple functions simultaneously: they act as radiating elements for both antennas, provide coupling between the two antenna systems, and contribute to achieving the required isolation. This multi-functionality eliminates the need for separate isolation components.
2Adaptability or versatility
If more lumped elements are added to achieve wide-band response, then bandwidth is improved, but device complexity and cost increase
Solution Approach 1:
The patent employs continuous radiating metal branches with optimized geometries that can support multiple resonance modes across a wide frequency range. The structure is designed to dynamically adapt its electromagnetic characteristics across different frequencies, achieving wide-band response without requiring additional lumped elements for each frequency band.
Solution Approach 2:
The patent uses a composite structure combining dielectric substrate with metallic radiating branches and grounding planes. This composite configuration enables broad bandwidth by leveraging the complementary electromagnetic properties of different materials and structures working together, eliminating the need for multiple lumped elements.
3Reliability
If separate structures are used for dual antennas, then isolation is maintained, but integration degree is limited by physical size
Solution Approach 1:
The patent merges the two antenna systems by sharing common radiating metal branches and grounding structures. The first and second antennas both utilize the same radiating metal branches, creating a highly integrated dual-antenna system that reduces the overall physical footprint while maintaining functional separation through controlled coupling mechanisms.
Solution Approach 2:
The patent implements a nested configuration where the coupling metal branch is positioned within the projection area of the loop metal branch, and the first and second metal branches are arranged in close proximity. This nested layout achieves high integration density while maintaining the necessary electromagnetic isolation between the two antenna systems.
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 good isolation and miniaturization, improving space utilization and radiation efficiency while eliminating the bandwidth limitations and energy consumption associated with lumped elements, ensuring compliance with 5G NR specifications.
Implementation Method 1
a coupling metal branch located on the second surface of the dielectric substrate and connected to the grounding plane, the vertical projection of the coupling metal branch and that of the loop metal branch on the second surface partially overlap
Implementation Method 2
use antenna multi-mode integration to achieve wide-band operation mode and increase isolation, in order to comply with 5G NR n77/78/79 (3.3 GHz ̃5 GHz) spectrum specifications
Data Source
AI summary
A broadband dual-antenna system provided herein comprises: a dielectric substrate including a first surface and a second surface; a grounding plane on the dielectric substrate; a loop metal branch located on the first surface and connected to the grounding plane; a coupling metal branch located on the second surface and connected to the grounding plane, the vertical projection of the coupling metal branch and that of the loop metal branch on the second surface partially overlap; a first metal branch located on the second surface and the coupling metal branch; a second metal branch located on the second surface and the coupling metal branch; a first signal source located on the second surface and connected to the first metal branch and the grounding plane; and a second signal source located on the second surface and connected to the second metal branch and the grounding plane.