Power Processing Circuit Micro-Strip Coupling Harmonic Suppression

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Solution Overview

Problem

In mobile communications, existing power processing circuits face challenges in efficiently dividing and combining input powers while minimizing signal interference and harmonic distortions, particularly at specific frequency ranges like 5.5 GHz.

Innovation Solution

A power processing circuit printed on a PCB, featuring micro-strip coupling portions and resistors, is designed to divide or combine power signals, with specific impedance matching and harmonic suppression techniques, including U-shaped micro-strip configurations and resistors to isolate signals and suppress second harmonics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If conventional power processing circuits are used, then power division and combination can be achieved, but signal interference and harmonic distortions increase

Engineering Contradiction:

Improvesignal interference and harmonic distortionsVSAvoidpower division and combination efficiency

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent introduces coupling portions as intermediary elements between different signal paths. These coupling portions include resistors that act as mediators to isolate signals and reduce interference between power amplifiers, thereby decreasing harmonic distortions while maintaining effective power division and combination.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent employs impedance matching techniques by carefully designing the electrical characteristics of coupling portions and transmission lines. By adjusting parameters such as resistance values, trace widths, and lengths of micro-strip lines, the circuit achieves optimal signal transmission with minimized reflections and distortions across specific frequency ranges.

Inventive Principle:

Principle #35Parameter changes

2Power

If power amplifiers operate at high frequencies (e.g., 5.5 GHz), then transmission power increases, but harmonic distortions and signal interference worsen

Engineering Contradiction:

Improvetransmission powerVSAvoidharmonic distortions

Core Design Contradiction:

PowerVSObject-generated harmful factors

Solution Approach 1:

The patent converts the harmful second harmonic signals into beneficial filtering opportunities. By designing the coupling portions and resistors to specifically target and suppress second harmonics generated by power amplifiers at high frequencies, the circuit transforms the problematic harmonic content into a controlled filtering function, reducing distortions while preserving the desired transmission power.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Object-generated harmful factors

If complex filtering structures are added to suppress harmonics, then harmonic distortions decrease, but device complexity increases

Engineering Contradiction:

Improveharmonic distortionsVSAvoidcircuit structure

Core Design Contradiction:

Object-generated harmful factorsVSDevice complexity

Solution Approach 1:

The coupling portions in the patent serve multiple functions simultaneously: they provide signal isolation between amplifiers, enable impedance matching, suppress harmonic distortions, and maintain power division/combination capabilities. This multi-functionality eliminates the need for separate filtering components, reducing overall device complexity while effectively suppressing harmonics.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Object-affected harmful factors

If isolation resistors are added to reduce signal interference, then signal interference decreases, but device complexity and manufacturing difficulty increase

Engineering Contradiction:

Improvesignal interferenceVSAvoidcircuit assembly

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent merges the isolation resistor functionality directly into the PCB trace structure itself. Rather than using discrete resistor components that would require separate assembly steps, the resistive elements are integrated as printed circuit board traces, combining the isolation function with the existing signal transmission paths and simplifying manufacturing.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS9923531B2Power processing circuit, two-path power processing circuit and multiplex power processing circuit

Publication Date: 2018.03.20 NANNING FUGUI PRECISION IND CO LTD

AI summary

A power processing circuit includes a first portion, a second portion, a third portion, a resistor, a first coupling portion, a second coupling portion, a third coupling portion and a fourth coupling portion. The first portion, the second portion and the third portion are connected to respective external components. The first coupling portion and the third coupling portion are micro-strips symmetrical to the first portion. The second coupling portion and the fourth coupling portion are micro-strips symmetrically connected to two terminals of the resistor.