Wideband Antenna Coupling Gap Design
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Solution Overview
Problem
Existing wireless communication antennas, such as inverted-F, loop, and couple antennas, face challenges in achieving wideband operations with good matching effects and adjustability while maintaining a small size, particularly in low-frequency bands, which limits their effectiveness in meeting the requirements of evolving wireless communication systems like LTE.
Innovation Solution
A wideband antenna design featuring a grounding terminal, a first radiator with a feeding terminal, and a second radiator that generates a coupling effect through a minimum gap, allowing for adjustable lengths and configurations to achieve multiband or wideband operations, including direct feed-in and coupling mechanisms to cover various frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If additional metal segments are supplemented in the inverted-F antenna to improve low-frequency performance, then the bandwidth is improved, but the cost increases
Solution Approach 1:
The patent combines the functions of multiple metal segments into a single integrated second radiator that is electrically connected to the grounding terminal. This single radiator structure achieves the same bandwidth improvement effect as multiple separate segments would provide, thereby reducing manufacturing complexity and cost while maintaining the enhanced low-frequency performance.
2Device complexity
If the resonating length of a loop antenna is set to one half of the wavelength, then the antenna structure is simple, but the operating bands are too narrow
Solution Approach 1:
The patent designs the second radiator to serve multiple functions: it acts as a resonating element for wideband operations, provides coupling with the first radiator to extend operating bands, and maintains electrical connection to the grounding terminal for proper signal reference. This multi-functional design enables the antenna to operate across multiple frequency bands while keeping the overall structure relatively simple.
3Area of moving object
If a couple antenna utilizes the coupling effect between components to resonate the required frequency band, then the frequency band coverage is improved, but the frequency bands are not easy to be adjusted
Solution Approach 1:
The patent incorporates adjustable elements in the second radiator, such as movable components or reconfigurable structures, that allow the coupling effect and resonating characteristics to be dynamically adjusted. This enables the antenna to adapt to different frequency band requirements by modifying the position or configuration of the second radiator relative to the first radiator and grounding terminal, thereby achieving both wide frequency band coverage and easy adjustability.
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 enables efficient multiband or wideband operations with reduced antenna size, improved matching effects, and enhanced radiation efficiency across different frequency bands, including low-frequency bands, by adjusting the lengths and configurations of the radiators and gap, thereby meeting the requirements of portable wireless communication equipment.
Implementation Method 1
a minimum gap between the second radiator and the first radiator allows the second radiator and the first radiator to generate a coupling effect therebetween to deliver RF signals
Data Source
AI summary
A wideband antenna includes a grounding terminal, a first radiator disposed on a first plane, a feeding terminal formed on the first radiator, where the feeding terminal is to transmit and receive radio signals via the first radiator, and a second radiator disposed on the first plane, electrically connected to the grounding terminal, and including a part parallel to a side of the first radiator, wherein a minimum gap between the second radiator and the first radiator allows the second radiator and the first radiator to generate a coupling effect therebetween, so as to exchange radio signals between the second radiator and the first radiator.