Antenna Passive Circuit Isolation for Multi-Band Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In electronic devices with metallic back covers and bezels, closely arranged antennas can experience signal interference, leading to degradation of antenna function due to the transmission and reception of multiple frequency band signals.
Innovation Solution
The implementation of a passive circuit with multiple electrical paths and reactance elements, such as delta-connected reactance elements, between the feeding terminals and antenna radiators to enhance isolation between different frequency band signals, allowing for improved radiation efficiency and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If antennas are closely arranged to support multiple frequency bands, then the device can transmit and receive signals with a plurality of frequency bands, but signal interference occurs between the antennas leading to degradation of antenna function
Solution Approach 1:
A passive circuit is introduced as an intermediary component between the first and second antennas. This passive circuit includes multiple electrical paths with different reactance characteristics that selectively guide frequency band signals, preventing direct interference between the closely arranged antennas while maintaining their proximity for space efficiency
Solution Approach 2:
The passive circuit is divided into multiple electrical paths (first electrical path and second electrical path), each with different reactance elements configured for specific frequency bands. This segmentation allows different frequency signals to be routed through different paths, reducing interference between the closely spaced antennas
2Reliability
If a passive circuit with multiple electrical paths is introduced to reduce signal interference, then isolation between frequency bands is improved, but the device complexity increases
Solution Approach 1:
The passive circuit is merged with the existing antenna feeding structure, sharing common grounding points and integrating closely with the antenna radiators. This merging approach reduces the need for separate isolation components and minimizes the increase in device complexity while maintaining effective frequency band isolation
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 passive circuit effectively enhances isolation between frequency bands, improving radiation efficiency and maintaining resonance functionality across various frequency bands, thereby enhancing the overall performance of the electronic device's antenna system.
Implementation Method 1
a passive circuit including a plurality of electrical paths... delta-connected reactance elements... enhance isolation between the first frequency band signal and the second frequency band signal
Data Source
AI summary
An electronic device is provided. The electronic device includes an antenna radiator, a first feeding terminal configured to supply a first frequency band signal to the antenna radiator, a second feeding terminal configured to supply a second frequency band signal to the antenna radiator, and a plurality of grounds electrically connected with the antenna radiator. The first feeding terminal is connected with the antenna radiator and at least one of the plurality of grounds through a passive circuit including a plurality of electrical paths.