Multipath Open Loop Antenna for Wideband WAN Miniaturization
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Solution Overview
Problem
Conventional antenna designs face challenges in achieving stable radiation performance across ultra-wide bandwidths while minimizing spatial requirements, as they often require more space to achieve multiple resonances, which is not feasible with modern device constraints.
Innovation Solution
The design incorporates open loop conductors with multipath current distribution on a flexible substrate, allowing for ultra-wideband characteristics and miniaturization, with a MIMO 2×2 configuration and optional band pass filter, to achieve high performance and reduced spatial requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antenna topologies use one or two paths to obtain lower and upper resonances, then radiation performance is achieved at specific frequencies, but spatial requirements increase which is not available with modern device constraints
Solution Approach 1:
The antenna conductor is divided into multiple segments that create multiple current paths between the feed point and ground. These segmented paths include direct path, via first via, via second via, and via third via, each providing different resonance frequencies. This segmentation allows multiple resonances to be achieved within a compact area by creating electromagnetic coupling between adjacent segments rather than requiring separate large antenna elements.
Solution Approach 2:
The antenna design embeds multiple current paths and resonance mechanisms within a single compact conductor structure. The nested configuration allows lower resonance, upper resonance, and additional resonances to be contained within the same spatial footprint by creating hierarchical current distribution paths, effectively nesting multiple functional resonances within one another.
2Adaptability or versatility
If conventional techniques widen the resonances to get more bandwidth, then frequency response is improved, but more space per each element is required
Solution Approach 1:
The antenna transitions from planar two-dimensional conductor traces to three-dimensional current paths by incorporating vertical vias that connect different layers or levels. This dimensional transition creates additional current path lengths and resonance mechanisms without increasing the planar footprint, achieving ultra-wide bandwidth within compact spatial constraints.
Solution Approach 2:
The antenna conductor structure serves multiple functions simultaneously: it provides lower resonance, upper resonance, and additional resonances through different current paths; it achieves impedance matching; and it maintains compact dimensions. The multi-functional design eliminates the need for separate elements for each resonance, achieving ultra-wide bandwidth in a single compact structure.
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 significant size reduction, improved reliability, higher data transfer rates, reduced connection drops, and enhanced sensitivity for WAN communications, while maintaining high performance and conforming to device housing shapes.
Implementation Method 1
open loop conductors with multipath current distributions for achieving multiple wideband resonances for use in WAN communications
Data Source
AI summary
The disclosure concerns an antenna with open loops and multipath current distribution to achieve ultra wideband characteristics and antenna miniaturization, while simultaneously keeping high performance for a more reliable WAN communication, with higher data transfer, less dropping connections and improved sensitivity. To further reduce spatial requirements, the antenna may be incorporated on a flex substrate for bending with the contour of a device housing or the like.