Broadband Antenna With Segmented Radiating Element
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Solution Overview
Problem
Existing dual frequency antennas have limited frequency bandwidth and low efficiency, making them unsuitable for combined devices like notebooks and mobile phones, where a wider bandwidth and improved compatibility are needed.
Innovation Solution
A broadband antenna with a closed looped structure comprising a radiating element, a grounding element, and a connecting element, featuring a body section and a hollow section, which provides a wider frequency bandwidth and higher efficiency by optimizing the geometry of the radiating and connecting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a prior art dual frequency antenna is used, then the frequency bandwidth is wider than typical mobile phone antennas, but the bandwidth is still insufficient for combined devices and the antenna efficiency remains low
Solution Approach 1:
The radiating element is divided into multiple sections including a first radiating section, a second radiating section, and a third radiating section with different impedance values. This segmentation allows each section to contribute to different frequency bands, achieving both wide bandwidth and high efficiency by optimizing the electrical characteristics of each segment independently
Solution Approach 2:
Different sections of the radiating element are assigned different local electrical qualities through varying impedance values. The first radiating section has a first impedance value, the second radiating section has a second impedance value, and the third radiating section has a third impedance value. This local quality variation enables the antenna to maintain high efficiency across a wide frequency range by matching different frequency components to appropriate impedance sections
2Volume of moving object
If the antenna size is reduced for better platform compatibility, then the manufacturing cost decreases, but the frequency bandwidth may be compromised
Solution Approach 1:
The antenna design transitions from a planar structure to a three-dimensional configuration by adding vertical height to the radiating elements. The first radiating section extends in a first direction, the second radiating section extends in a second direction different from the first, and the third radiating section extends in a third direction. This dimensional change allows the antenna to achieve wide bandwidth in a compact volume by utilizing spatial distribution rather than just planar expansion
Solution Approach 2:
The antenna structure employs a nested configuration where the second radiating section is positioned relative to the first radiating section, and the third radiating section is positioned relative to the second radiating section. This nesting allows multiple radiating elements to occupy overlapping or adjacent spatial regions, achieving compact size while maintaining the electrical length and bandwidth characteristics of longer elements
Data Source
AI summary
The present invention provides a broadband antenna that is used in wireless communication systems. The broadband antenna includes a closed looped radiating element having a body section and a hollow section formed by closed compassing by the body section; a grounding element; and a connecting element having a first end electrically connected to the closed looped radiating element and a second end electrically connected to the grounding element. The antenna of the present invention can provide a wider frequency bandwidth and better antenna efficiency.