High-Frequency Module Layout for Harmonic Isolation
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Solution Overview
Problem
In communication devices, the close proximity of transmission and reception components leads to harmonic interference, reducing reception sensitivity due to superimposed noise from harmonic waves.
Innovation Solution
A high-frequency module with a metal member disposed near transmission and electronic components, having an electrical length of a half or quarter wavelength of the harmonic component, to improve isolation and suppress noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the transmission component and electronic component are disposed close to each other on the same module board, then the device size is reduced, but harmonic interference occurs and reception sensitivity decreases
Solution Approach 1:
A metal member is introduced as an intermediary element between the transmission component and the electronic component. This metal member acts as a shield to block harmonic waves generated by the transmission component from interfering with the electronic component, thereby maintaining close proximity while preventing harmful interference.
Solution Approach 2:
The metal member is strategically positioned only in the region where harmonic interference occurs, providing localized shielding between the transmission and reception paths. This allows the overall module to maintain compact dimensions while achieving interference suppression at the critical interface.
2Reliability
If the metal member has an electrical length of half or quarter wavelength of the harmonic component, then isolation between components is improved, but the design complexity increases
Solution Approach 1:
The metal member's electrical length is designed to be a specific fraction (half or quarter) of the harmonic wavelength. By changing this dimensional parameter, the metal member resonates at the harmonic frequency to maximize shielding effectiveness, thereby improving isolation without requiring complex multi-layer structures.
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 isolation between transmission and electronic components, reducing harmonic interference and maintaining reception sensitivity.
Implementation Method 1
The metal member is disposed near at least one component out of the transmission component and the electronic component, and has an electrical length that is a half or a quarter of a wavelength of the harmonic component
Implementation Method 2
The metal member is disposed near at least one component out of the transmission component and the electronic component, and has an electrical length that is a half or a quarter of a wavelength of the harmonic component
Data Source
AI summary
A high-frequency module includes a mounting board, a transmission component, an electronic component, and metal members. The transmission component is disposed on the mounting board. The electronic component is disposed on the mounting board, and handles a signal in a frequency band that at least partially overlaps a frequency band of a harmonic component of a transmission signal generated by the transmission component. The metal members are disposed near at least one component out of the transmission component and the electronic component, and each have an electrical length that is a half or quarter of a wavelength of the harmonic component.