Nested Dual Band Antenna for Compact Laptop Integration
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Solution Overview
Problem
Existing dual band antennas for laptop PCs face challenges in accommodating low-frequency bands like 700 MHz within limited space, requiring a compact design that minimizes radio wave interference with other antennas while covering frequency bands for both Verizon and AT&T in the United States.
Innovation Solution
A dual band antenna design featuring a first radiation element and a second radiation element formed into horizontal patterns on a dielectric substrate, with each element connected to a ground element and arranged at approximately 90 degrees, allowing for compact integration and reduced interference by optimizing the placement of open ends and excitation patterns to resonate at specific frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional dual band antenna design is used, then it can cover higher frequency bands, but it cannot accommodate low-frequency bands like 700 MHz within limited space
Solution Approach 1:
The patent places the second radiation element (for 700 MHz band) inside the area surrounded by the first radiation element (for 2 GHz band) and the ground element. This nesting arrangement allows the lower frequency antenna to be positioned within the space occupied by the higher frequency antenna structure, enabling dual band operation in a compact form factor suitable for laptop PCs.
2Adaptability or versatility
If multiple antennas are arranged in limited space, then frequency coverage is achieved, but radio wave interference between antennas increases
Solution Approach 1:
The patent arranges the first and second radiation elements at approximately 90 degrees to each other, utilizing spatial orientation to separate the electromagnetic fields of the two frequency bands. This orthogonal arrangement reduces mutual interference while maintaining compact integration, as the radiation patterns of the two elements are oriented in different directions.
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 antenna achieves a wide frequency bandwidth covering 704 MHz to 787 MHz and 1700 MHz to 2200 MHz, ensuring compatibility with both Verizon and AT&T frequency bands within a small space, while minimizing radio wave interference, thus suitable for laptop PCs.
Implementation Method 1
A dual band antenna includes a first radiation element resonating with a first fundamental frequency and having a first open end, and a second radiation element resonating with a second fundamental frequency and having a second open end
Data Source
AI summary
There is provided an apparatus comprising: a first radiation element having a horizontal pattern extending in parallel with a ground element and having a first open end; a second radiation element having a horizontal pattern extending in parallel with the ground element and having a second open end; wherein each of said first radiation element and second radiation element connects to the ground element; wherein said second open end of the second radiation element occupies an area surrounded by a horizontal pattern of the first radiation element and the ground element; and a driven element including a first excitation pattern extending along the horizontal pattern of the first radiation element and a second excitation pattern extending along the horizontal pattern of the second radiation element. Other embodiments are disclosed.