Antenna Device Radiator Interference Reduction via Ground Mediator
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Solution Overview
Problem
The interference between wideband and narrowband antenna radiators in communication devices reduces radiation performance, making it difficult to miniaturize antenna devices while maintaining effective communication.
Innovation Solution
An antenna device structure featuring a wideband antenna radiator and a narrowband antenna radiator, with a substrate having a ground and dielectric region, where the radiators are designed with specific shapes and feeding lines, and a connecting structure that operates as an open circuit to prevent interference, allowing for omnidirectional radiation patterns and miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are disposed adjacent to each other in a communication device, then the device can service different communication bands, but the radiation performance deteriorates due to interference between antennas
Solution Approach 1:
The patent introduces a ground region as an intermediary element between the wideband antenna radiator and the narrowband antenna radiator. This ground region acts as a mediator that isolates the two radiators, preventing direct electromagnetic interference while allowing both antennas to function. The ground region is specifically positioned between the radiators and connected to the narrowband radiator, creating an effective barrier that maintains radiation performance across different communication bands.
2Reliability
If antennas are separated by a given distance or arranged with crossing radiation patterns to prevent interference, then radiation performance is improved, but additional space is required making miniaturization difficult
Solution Approach 1:
The patent utilizes the vertical dimension by stacking the wideband antenna radiator and the narrowband antenna radiator at different heights above the ground region. Instead of separating antennas horizontally which would require more area, the solution places one radiator above the other in the vertical direction. The wideband radiator is positioned at a first height and the narrowband radiator at a second height, both above the ground region, thereby preventing interference while minimizing the planar area occupied by the antenna device.
3Reliability
If an interference preventing device is applied to reduce antenna interference, then radiation performance is improved, but the difficulty of implementation increases and the device can only be used under special conditions
Solution Approach 1:
The patent integrates the interference prevention function directly into the ground region structure that is already necessary for antenna operation. Rather than adding a separate, complex interference preventing device, the ground region is designed to serve dual purposes: providing the reference plane for antenna operation and simultaneously acting as an interference barrier between the wideband and narrowband radiators. This merging of functions simplifies the overall device structure and makes the solution broadly applicable without special conditions.
Data Source
AI summary
The antenna device includes a substrate, a first radiator that is in a plane shape, operates as a wideband antenna, and is disposed on the dielectric region such that one end portion faces the ground region and an opposite end portion faces away from the ground region, a width of the opposite end portion being wider than a width of the one end portion, a second radiator that is in a line shape, operates as a narrowband antenna and at a lower frequency than the first radiator, and is disposed adjacent to the first radiator on the dielectric region such that one end portion faces the ground region and an opposite end portion faces away from the ground region, a first feeding line, a second feeding line, and a connecting structure connected with the first radiator, the first feeding line, the second radiator, and the second feeding line.