Printed Guiding Structure for Closely Spaced Antenna Isolation
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Solution Overview
Problem
Conventional antenna structures face challenges in achieving high isolation between closely spaced antennas due to signal interference, leading to complex designs and high manufacturing costs.
Innovation Solution
An antenna structure incorporating a printed-type guiding structure with specific geometric configurations, including hollow portions and a protruding portion, electrically connected to a ground surface, to enhance isolation between antennas without additional three-dimensional structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductor ground isolation objects are integrally stamped or welded through a mold to increase isolation, then isolation between antennas is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces mechanical isolation structures (conductor ground isolation objects that require stamping or welding) with an electromagnetic field-based solution. The feeding board with its specific impedance design (50Ω) and ground isolation feeding holes creates electromagnetic isolation between adjacent antennas, eliminating the need for complex mechanical isolation components and their associated manufacturing processes.
2Reliability
If conductor ground isolation objects are integrally stamped or welded through a mold to increase isolation, then isolation between antennas is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces mechanical isolation structures (conductor ground isolation objects that require stamping or welding) with an electromagnetic field-based solution. The feeding board with its specific impedance design (50Ω) and ground isolation feeding holes creates electromagnetic isolation between adjacent antennas, eliminating the need for complex mechanical isolation components and their associated manufacturing processes.
3Reliability
If neutral wire is electrically connected to first antenna and second antenna to increase isolation, then isolation is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts and eliminates the neutral wire component from the antenna isolation system. Instead of adding a neutral wire that connects to both antennas, the design uses the existing feeding board structure with ground isolation feeding holes to achieve isolation, thereby removing unnecessary components and simplifying the overall structure.
Solution Approach 2:
The feeding board serves multiple functions: it provides signal feeding to the antennas, establishes ground connections, creates electromagnetic isolation between antennas through its impedance design and ground isolation holes, and eliminates the need for separate neutral wire components. This multi-functionality reduces overall device complexity.
4Reliability
If neutral wire is electrically connected to first antenna and second antenna to increase isolation, then isolation is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts and eliminates the neutral wire component from the antenna isolation system. Instead of adding a neutral wire that connects to both antennas, the design uses the existing feeding board structure with ground isolation feeding holes to achieve isolation, thereby removing unnecessary components and simplifying the overall structure.
Solution Approach 2:
The feeding board serves multiple functions: it provides signal feeding to the antennas, establishes ground connections, creates electromagnetic isolation between antennas through its impedance design and ground isolation holes, and eliminates the need for separate neutral wire components. This multi-functionality reduces overall device complexity.
5Reliability
If metal arm is added to guide reflected signal to increase isolation, then isolation is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts and eliminates the metal arm component from the antenna isolation system. Instead of adding metal arms to guide reflected signals, the design uses the feeding board with ground isolation feeding holes to achieve isolation, thereby removing unnecessary components and simplifying the overall structure.
Solution Approach 2:
The feeding board acts as an intermediary structure that provides electromagnetic isolation between antennas through its impedance design and ground isolation holes, replacing the need for metal arms that would otherwise be required to guide and manage reflected signals between antenna elements.
6Reliability
If metal arm is added to guide reflected signal to increase isolation, then isolation is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts and eliminates the metal arm component from the antenna isolation system. Instead of adding metal arms to guide reflected signals, the design uses the feeding board with ground isolation feeding holes to achieve isolation, thereby removing unnecessary components and simplifying the overall structure.
Solution Approach 2:
The feeding board acts as an intermediary structure that provides electromagnetic isolation between antennas through its impedance design and ground isolation holes, replacing the need for metal arms that would otherwise be required to guide and manage reflected signals between antenna elements.
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 structure significantly increases isolation between antennas, reduces manufacturing costs, and improves flexibility in antenna placement design, achieving improved signal transmission efficiency.
Implementation Method 1
The metal arm can guide the reflected signal of the signal emitted by the second antenna and the third antenna to the metal arm
Implementation Method 2
The metal arm can guide the reflected signal of the signal emitted by the second antenna and the third antenna to the metal arm
Data Source
AI summary
An antenna structure includes a ground surface, a first antenna, a second antenna, and a printed-type guiding structure located between the first antenna and the second antenna. The first antenna, the second antenna, and the printed-type guiding structure are electrically connected to the ground surface. The printed-type guiding structure includes a first hollow portion, a second hollow portion, and a protruding portion. The angle between the axes of the two hollow portions is 30°-50°. The protruding portion is disposed between the external of the first side of the first hollow portion and the interior of the first side of the second hollow portion. The second hollow portion has a short arm on the first side and a long arm on the second side. The total length of the short arm and the long arm is 0.2-0.3 times the operating frequency wavelength.