Antenna Module Resonant Structure Reduces Mutual Interference
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Solution Overview
Problem
Existing antenna systems with multiple elements in close proximity suffer from mutual interference effects in their radiating patterns, complicating design and introducing frequency characteristic variances due to the incorporation of electric reactance circuits and complex assembly steps.
Innovation Solution
An antenna system comprising a first antenna element adapted to a first frequency band and a second antenna element adapted to a second frequency band, with a radiating structure on one side of a dielectric substrate and a resonant structure on the reverse side, acting as an open-loop type resonator to suppress frequencies in the second frequency band, thereby reducing interference and simplifying assembly by eliminating the need for additional electrical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple antenna elements are arranged in close proximity to form an antenna system, then structural advantages are achieved through sharing housing, base, PCB circuitry, and electrical connections, but mutual interference effects occur in the radiating patterns of the antenna elements
Solution Approach 1:
The patent applies dimensionality change by moving the resonant structure to the reverse side of the dielectric substrate, creating spatial separation in the z-dimension (thickness direction) between the radiating structure on the front side and the resonant structure on the back side. This allows the antenna elements to be arranged in close proximity while the resonant structures suppress interference in the frequency bands of other elements, resolving the contradiction between structural integration and interference reduction.
2Object-generated harmful factors
If electric reactance circuits are incorporated to reduce coupling and interference effects between antenna elements, then interference is reduced, but the design becomes more complicated and introduces unacceptable variances to the frequency characteristic
Solution Approach 1:
The patent merges the resonant structure directly with the radiating structure by integrating it onto the same dielectric substrate without requiring separate electric reactance circuits. This integration eliminates the need for additional components and assembly steps, reducing design complexity while maintaining the interference suppression function. The resonant structure is electrically connected to the radiating structure through the dielectric substrate, creating a unified antenna element design.
3Object-generated harmful factors
If electric reactance circuits are used to reduce interference between antenna elements, then coupling effects are reduced, but additional assembly steps and soldered connections are required introducing unacceptable variances
Solution Approach 1:
The resonant structure is manufactured as an integral part of the antenna element on the dielectric substrate, eliminating the need for separate assembly steps and soldered connections. The structure can be fabricated using standard PCB techniques such as etching or printing, making it as easy to manufacture as the radiating structure itself while providing interference suppression functionality.
4Area of stationary object
If the resonant structure occupies the same area as the radiating structure, then space is efficiently utilized, but the radiating pattern may be affected
Solution Approach 1:
The patent resolves the area conflict by placing the resonant structure on the reverse side of the dielectric substrate, allowing both the radiating structure on the front side and the resonant structure on the back side to occupy the same planar area without physical interference. This spatial arrangement in the z-dimension enables efficient space utilization while the resonant structure suppresses unwanted radiation patterns in specific frequency bands.
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 reduces interference between the radiating patterns of the antenna elements, simplifies the design and assembly process, and maintains flexible antenna design dimensions, enhancing the bandwidth and reducing assembly complexity.
Implementation Method 1
The at least one resonant structure is an open-loop type resonator adapted to resonate at a frequency in the second frequency band
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
The invention relates to an improved antenna system and antenna module incorporating same. The antenna system comprises a first antenna element adapted to a first frequency band and a second antenna element adapted to a second frequency band. The radiation pattern of the second antenna is improved because the first antenna element comprises: a radiating structure provided on a first side of a dielectric substrate, and at least one resonant structure provided, at least in part, on a second, reverse side of the dielectric substrate. The at least one resonant structure is an open-loop type resonator adapted to resonate at a frequency in the second frequency band. The at least one resonant structure is provided at close proximity to the radiating structure on the reverse sides of the dielectric substrate, occupying, on the second side of the dielectric substrate, an area which is only in part covered by the radiating structure on the first side of the dielectric substrate.