Symmetric Transceiver Coupler Layout for Harmonic Suppression
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Solution Overview
Problem
Transceiver circuits face challenges in suppressing harmonics without increasing chip area or reducing symmetry, as existing methods require additional chip regions for harmonic suppression, affecting performance and efficiency.
Innovation Solution
Integrating harmonic wave filters with passive components within the original design, using coiled conductive layer patterns arranged symmetrically with respect to virtual axes to form notch filters, which reduces additional chip usage and maintains symmetry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a notch filter including inductors and capacitors is configured to suppress third harmonics, then harmonic suppression is improved, but additional chip area is used and circuit layout symmetry is reduced
Solution Approach 1:
The patent merges the notch filter function with the existing signal coupler by integrating inductors and capacitors into the coupler structure. The signal coupler serves dual purposes: signal coupling and harmonic filtering, eliminating the need for separate filter components and reducing chip area usage.
Solution Approach 2:
The signal coupler is designed to perform multiple functions simultaneously: it acts as both a signal coupling element and a harmonic filtering element through the integrated inductor-capacitor network. This multi-functionality reduces the overall component count and chip area requirement.
2Object-generated harmful factors
If a notch filter including inductors and capacitors is configured to suppress third harmonics, then harmonic suppression is improved, but circuit layout symmetry is reduced
Solution Approach 1:
The notch filter components are merged into the signal coupler structure, allowing the filtering function to be implemented without adding separate asymmetric elements to the layout. The integrated design maintains the original symmetric arrangement of the coupler while incorporating filtering capability.
Solution Approach 2:
The inductor and capacitor elements are strategically placed within the signal coupler structure at specific locations that maintain overall symmetry. The filtering function is achieved through local modifications that do not compromise the global symmetric layout of the circuit.
3Object-generated harmful factors
If additional regions of the chip are used to configure the inductor of the filter, then harmonic filtering is improved, but device complexity increases
Solution Approach 1:
The filter inductor is merged with the signal coupler structure, sharing the same physical space and functional integration. This reduces the number of discrete components and simplifies the overall device structure while maintaining effective harmonic filtering capability.
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
Effectively suppresses harmonics, such as third harmonics in WiFi 2.4 GHz, while maintaining chip symmetry and reducing additional chip area usage, improving RF characteristics and filtering performance.
Implementation Method 1
a notch filter configured on the substrate and including a coiled second conductive layer pattern
Implementation Method 2
a signal coupler configured on the substrate and including a coiled first conductive layer pattern
Data Source
AI summary
A transceiver circuit including: a substrate; a signal coupler configured on the substrate and including a coiled first conductive layer pattern; and a notch filter configured on the substrate and including a coiled second conductive layer pattern; wherein each of the first conductive layer pattern and the second conductive layer pattern is arranged as a substantially symmetrical pattern with respect to a first virtual axis.