Wideband Antenna Vertical Coupling for Broadband
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Solution Overview
Problem
Existing multi-band antennas fail to accommodate the expanding bandwidth requirements of wireless communication systems while maintaining a compact physical dimension, as they are limited in their ability to transmit radio signals across a wider operational band.
Innovation Solution
A wideband antenna design utilizing a vertical coupling connection effect between a first radiating body and a second radiating body, where the conducting unit forms a coupling connection with the second radiating body via a specific distance, allowing for efficient transmission of radio signals across both high and low frequency bands, with the second radiating body being closer to the grounding unit than the first radiating body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional multi-band antenna design is used, then the antenna can transmit radio signals in a specific frequency band (2.2 GHz to 2.6 GHz), but the bandwidth is limited and cannot satisfy wider operational band requirements
Solution Approach 1:
The antenna is divided into multiple radiating units (first radiating unit, second radiating unit, third radiating unit) with different orientations and functions. Each unit contributes to different frequency bands, allowing the antenna to achieve wideband operation through segmented functional elements rather than a single complex structure
Solution Approach 2:
The patent introduces vertical coupling connection between radiating units arranged in different spatial dimensions. The first radiating unit extends along the x-axis, the second along the y-axis, and the third along the z-axis, creating a three-dimensional radiation structure that expands bandwidth without proportionally increasing planar footprint
2Adaptability or versatility
If the antenna structure is expanded to cover wider frequency bands, then the bandwidth increases, but the physical dimension of the antenna increases
Solution Approach 1:
The antenna design nests multiple radiating units within a compact three-dimensional space. The units are arranged orthogonally and coupled vertically, allowing them to share common ground structures and feed networks, thereby achieving wideband operation without proportionally increasing the overall antenna volume
Solution Approach 2:
By utilizing vertical coupling connections and three-dimensional spatial arrangement of radiating units, the antenna achieves bandwidth expansion in the frequency domain without requiring proportional expansion in physical dimensions, effectively decoupling bandwidth from physical size
3Adaptability or versatility
If multiple radiating elements are added to extend the transmitting band, then the bandwidth increases, but the impedance matching and radiating patterns become more difficult to control
Solution Approach 1:
Each radiating unit is designed with specific local characteristics (different orientations along x, y, z axes) that contribute to different frequency bands. The vertical coupling connections are strategically positioned to provide localized impedance transformation and matching, allowing independent optimization of each unit's contribution to the overall bandwidth without compromising control over impedance matching
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 design achieves a wider application field with improved voltage standing wave ratio (VSWR) and a broadband wireless transmitting range from 2.2 GHz to 6 GHz, satisfying ideal transmitting conditions with a VSWR smaller than 2, particularly smaller than 1.5 in specific frequency bands.
Implementation Method 1
a third radiating unit electrically connected to the short-circuit unit, and comprising a branch extending along the third direction to generate a coupling connection effect with the conducting unit via a first distance
Data Source
AI summary
A wideband antenna includes a grounding unit electrically connected to a ground, a feed-in source for transmitting and receiving radio frequency signals, a first radiating body including a first radiating unit extending along a first direction, a second radiating unit extending along a second direction opposite to the first direction, and a conducting unit extending along a third direction, and a second radiating body including a short-circuit unit electrically connected to the grounding unit, a third radiating unit including a branch to generate a coupling connection effect with the conducting unit via a first distance, wherein an average perpendicular distance between the second radiating body and the grounding unit is smaller than an average perpendicular distance between the first radiating body and the grounding unit.