Multi-Layer Antenna Layout for Directivity and Antenna Isolation
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Solution Overview
Problem
Existing antenna devices struggle to improve directivity towards a predetermined direction and isolation from other antennas, particularly when mounted on television sets, where internal mutual interference occurs due to the placement of wireless terminals compliant with different standards like Bluetooth and wireless LAN, which affects the propagation of electromagnetic waves.
Innovation Solution
The antenna device incorporates a printed wiring board with a specific configuration of conductor layers and dielectric layers, including a parasitic element and an artificial magnetic conductor (AMC) to enhance directivity and isolation, allowing for effective radiation towards the front while minimizing interference with other wireless devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple wireless terminals compliant with different standards are placed inside television sets, then wireless communication functionality is enhanced, but internal mutual interference occurs affecting electromagnetic wave propagation
Solution Approach 1:
The patent introduces a parasitic element as an intermediary component between the feed element and the AMC structure. This parasitic element acts as a mediator that controls and directs electromagnetic wave propagation, preventing mutual interference between different wireless terminals while maintaining their individual functionality. The parasitic element couples with the AMC to create a controlled radiation pattern that reduces interference.
Solution Approach 2:
The patent applies local quality by creating specific radiation characteristics in different spatial directions. The antenna device is designed to have high directivity toward a predetermined direction (improving signal quality in that direction) while simultaneously providing isolation in other directions (reducing interference). This spatial differentiation of radiation properties allows multiple wireless terminals to coexist without mutual interference.
2Measurement precision
If antenna directivity towards a predetermined direction is improved, then signal quality in that direction is enhanced, but isolation from other antennas becomes more difficult to achieve
Solution Approach 1:
The patent employs a composite structure combining a parasitic element, an artificial magnetic conductor (AMC), and a feed element. This composite antenna system leverages the complementary properties of each component: the feed element generates electromagnetic waves, the parasitic element controls their directionality, and the AMC enhances isolation. The interaction between these different components creates both high directivity and improved isolation simultaneously.
Solution Approach 2:
The patent transitions from considering only the radiation pattern in one dimension to utilizing three-dimensional spatial characteristics. By designing the antenna with specific geometric configurations in three dimensions (including the positioning and orientation of the parasitic element relative to the AMC), the system achieves high directivity in the desired direction while creating natural isolation in other spatial dimensions, effectively solving the contradiction between directivity and isolation.
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 improved directivity towards the intended direction and reduced interference from other antennas, allowing for secure radiation patterns and efficient communication in devices like television receivers.
Implementation Method 1
antenna device utilizing an artificial magnetic conductor (AMC)
Implementation Method 2
feed element, and a parasitic element... allowing for effective radiation towards the front
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An antenna device (10) includes: a first conductor layer (20); a second conductor layer (30) located opposite to the first conductor layer (20); and a third conductor layer (40) located opposite to the second conductor layer (30). The first conductor layer (20) includes: a feed element (21); a first grounding element (22) located next to the feed element (21) in a first direction and grounded; and a parasitic element (23) located along the feed element (21) and the first grounding element (22) and insulated from the feed element (21) and the first grounding element (22). The second conductor layer (30) includes: a floating element (31) located opposite to the feed element (21) and insulated from the first conductor layer (20); and a second grounding element (32) located opposite to the first grounding element (22) and next to the floating element (31) and grounded. The third conductor layer (40) includes a third grounding element (41) grounded.