Antenna Substrate Parasitic Compensation Circuit
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Solution Overview
Problem
The frequency adjustment element in electronic devices causes parasitic elements that lead to impedance mismatching, degrading antenna performance, especially in high-frequency bands, and existing solutions require additional components increasing cost and space.
Innovation Solution
A substrate with a conductive pattern and a tuner mounted on it, featuring a ground, switching elements, and conductive pads, where the conductive pattern includes electrical paths to electrically contact the pads, reducing parasitic elements without the need for additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a frequency adjustment element is mounted on the substrate, then the resonance frequency of the antenna can be adjusted to cover wider frequency bands, but parasitic elements are introduced that cause impedance mismatching and degrade antenna performance
Solution Approach 1:
The patent extracts and eliminates the parasitic elements generated by the frequency adjustment element through a compensation circuit. The compensation circuit is specifically designed to cancel out the parasitic capacitance and inductance introduced by the frequency adjustment element, thereby removing the harmful effects while preserving the frequency adjustment functionality.
Solution Approach 2:
The patent introduces a compensation circuit as an intermediary component between the frequency adjustment element and the antenna. This compensation circuit acts as a mediator that counteracts the parasitic effects, allowing the frequency adjustment element to function without degrading antenna performance. The compensation circuit includes additional capacitors and inductors that compensate for the parasitic parameters.
2Reliability
If an additional element is mounted on the substrate to remove the parasitic element of the frequency adjustment element, then antenna performance can be maintained, but cost and space for mounting increase
Solution Approach 1:
The patent merges the compensation function with the existing frequency adjustment element by integrating the compensation circuit into the same substrate area. The compensation capacitors and inductors are combined with the frequency adjustment element's components, creating a unified structure that performs both frequency adjustment and parasitic compensation without requiring separate additional mounting spaces.
Solution Approach 2:
The compensation circuit is designed to serve multiple functions: it compensates for parasitic elements across different frequency bands while also working in conjunction with the frequency adjustment element. The same compensation components effectively handle both the parasitic capacitance and inductance issues, providing universal solutions for maintaining antenna performance across various operating conditions.
Data Source
AI summary
According to one embodiment of the disclosure, an electronic device comprises: a printed circuit board including a conductive pattern; and a tuner mounted on the conductive pattern and electrically connected to the conductive pattern, wherein the tuner comprises: a ground; a first conductive pad; a first switching element electrically connected between the ground and the first conductive pad; and a second conductive pad electrically disconnected with the ground, wherein the conductive pattern may comprise: a first electrical path in electrical contact with the first conductive pad; and a second electrical path in electrical contact with the second conductive pad and electrically shorted to the first electrical path. Various other embodiments are possible.