Loop Antenna Coupling Structure for Wider Multi-Band Bandwidth
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Solution Overview
Problem
Existing antenna technologies face challenges in balancing cost, size, and performance to meet the increasing demands for improved transmission rate and signal quality in communication devices.
Innovation Solution
The integration of a loop antenna with a passive radiating element, such as an inductor, and a coupling capacitor formed by parallel alignment, along with the inclusion of patch antennas on a substrate to enhance frequency response across various frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single-antenna design is used, then the device complexity is low, but the transmission bandwidth and signal quality across different frequency bands are insufficient
Solution Approach 1:
The patent combines a loop antenna and a patch antenna into a single integrated antenna device. The loop antenna handles low frequency bands while the patch antenna handles high frequency bands, merging two antenna types into one unified structure that provides broad frequency coverage without requiring separate antenna systems.
Solution Approach 2:
The integrated antenna device serves multiple functions across different frequency bands. The loop antenna provides radiation and coupling capabilities for low frequency bands, while the patch antenna provides radiation capabilities for high frequency bands, making the single device universally applicable across multiple frequency ranges.
2Area of stationary object
If the antenna size is reduced to meet compact device requirements, then the device size is smaller, but the transmission bandwidth and radiation performance deteriorate
Solution Approach 1:
The patent utilizes the third dimension (vertical spacing) to achieve frequency separation. The loop antenna and patch antenna are positioned at different heights above the ground plane, with the loop antenna having a first spacing and the patch antenna having a second spacing. This vertical dimensionality allows both antennas to coexist in a compact footprint while maintaining their respective frequency band performances.
Solution Approach 2:
The patent embeds the patch antenna structure within the same spatial envelope as the loop antenna. The patch antenna is positioned on one side of the substrate while the loop antenna is positioned on the other side, with both antennas sharing the same overall device footprint. This nesting approach allows multiple antenna functions to be packed into a compact size.
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
Enhances transmission bandwidth and maintains signal quality in low and high frequency bands, improving the overall performance of the antenna device.
Implementation Method 1
The coupling section and at least one portion of the loop antenna are substantially parallel to each other and have a first spacing to form a coupling capacitor
Implementation Method 2
Another aspect of the present disclosure is an antenna device, comprising a loop antenna and a inductor element
Implementation Method 3
The loop antenna comprises a ground section, a feed section and a radiating section
Data Source
AI summary
An antenna device, comprising a loop antenna and a passive radiating element. The loop antenna comprises a first terminal of the loop antenna and a second terminal of the loop antenna. The first terminal of the loop antenna is coupled to a feed terminal, and the second terminal of the loop antenna is coupled to a ground terminal. The passive radiating element comprises a first terminal of the passive radiating element and a second terminal of the passive radiating element. The first terminal of the passive radiating element is coupled to the feed terminal, and the second terminal of the passive radiating element has a coupling section. The coupling section and at least one portion of the loop antenna are substantially parallel to each other and have a first spacing to form a coupling capacitor.