Loop Antenna Structure for Wideband Impedance Matching
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Solution Overview
Problem
Existing antennas in mobile devices often have insufficient bandwidth, which negatively affects communication quality, particularly in devices requiring wideband operations across multiple frequency bands.
Innovation Solution
A novel antenna structure comprising a ground element, feeding radiation element, connection radiation element, coupling radiation element, first and second shorting radiation elements, forming a loop structure, which allows for wideband operation by adjusting resonant paths and coupling gaps to enhance bandwidth and impedance matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional antenna designs are used, then device size is reduced, but bandwidth is insufficient
Solution Approach 1:
The antenna structure is divided into multiple radiation elements (feeding radiation element, connection radiation element, coupling radiation element, first shorting radiation element, second shorting radiation element) that work together to achieve wideband performance. Each element serves a specific function in the overall bandwidth expansion strategy.
Solution Approach 2:
The antenna elements are arranged in a nested configuration where smaller elements are positioned within or adjacent to larger elements. The coupling radiation element is coupled to the feeding radiation element through the connection radiation element, creating a compact nested structure that achieves wideband operation without proportionally increasing overall size.
2Quantity of substance
If antenna elements are added to increase bandwidth, then bandwidth is improved, but device size increases
Solution Approach 1:
The antenna structure utilizes three-dimensional spatial arrangement with elements positioned at different heights and orientations. The loop structure formed by the radiation elements and ground element creates a compact volumetric configuration that achieves wideband performance without proportionally increasing the antenna's footprint area.
Solution Approach 2:
Multiple radiation elements are nested within a compact volume, with the coupling radiation element positioned adjacent to the feeding radiation element and both coupled through the connection radiation element. This nested arrangement allows multiple functional elements to coexist in a small space.
3Adaptability or versatility
If multiple frequency bands are supported, then communication versatility is improved, but impedance matching becomes more difficult
Solution Approach 1:
Different portions of the antenna structure are optimized for different frequency bands. The feeding radiation element, connection radiation element, and coupling radiation element have specific geometries and positioning that create resonant paths tailored for low-frequency bands, while the same structure also supports high-frequency bands through different resonant modes. The first and second shorting radiation elements provide localized impedance control.
Solution Approach 2:
The antenna structure achieves wideband impedance matching by carefully controlling geometric parameters including the lengths, widths, and spacing of the radiation elements. The loop structure formed by the ground element, connection radiation element, first shorting radiation element, and second shorting radiation element creates resonant conditions that maintain good impedance matching across both low-frequency and high-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 antenna structure achieves wideband performance covering low-frequency bands up to high-frequency bands, supporting conventional WLAN and next-generation Wi-Fi 6E, with improved radiation gain and impedance matching, while maintaining a compact size and low manufacturing cost.
Implementation Method 1
A novel antenna structure includes a ground element, a feeding radiation element, a connection radiation element, a coupling radiation element, a first shorting radiation element, and a second shorting radiation element... A loop structure is formed by the ground element, the connection radiation element, the first shorting radiation element, and the second shorting radiation element
Data Source
AI summary
An antenna structure includes a ground element, a feeding radiation element, a connection radiation element, a coupling radiation element, a first shorting radiation element, and a second shorting radiation element. The feeding radiation element has a feeding point. The coupling radiation element is coupled through the connection radiation element to the feeding radiation element. The coupling radiation element is also coupled through the first shorting radiation element to a first grounding point on the ground element. The feeding radiation element is also coupled through the second shorting radiation element to a second grounding point on the ground element. A loop structure is formed by the ground element, the connection radiation element, the first shorting radiation element, and the second shorting radiation element.