Power Amplifier Harmonic Suppression Using Coupled Line Resonators
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Solution Overview
Problem
Existing power amplifiers require parallel arrangement of three lines to suppress second and third harmonics, which is not feasible in all spaces, leading to incomplete harmonic suppression.
Innovation Solution
A power amplifier configuration with a transmission line, a stub, and a coupled line arranged in parallel, where the stub and coupled line act as a resonator for odd order harmonics, and the transmission line, stub, and coupled line act as a resonator for even order harmonics, allowing harmonic suppression with only two lines in parallel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If three lines (transmission line, second harmonic resonator, third harmonic resonator) are arranged in parallel to suppress second and third harmonics, then harmonic suppression performance is improved, but device area increases
Solution Approach 1:
The patent merges the functions of multiple resonators into a single integrated resonator structure. The resonator is designed with specific impedance characteristics that enable it to suppress both second and third harmonics simultaneously, eliminating the need for separate second harmonic resonator and third harmonic resonator structures, thus reducing device area while maintaining harmonic suppression performance
Solution Approach 2:
The resonator is designed to perform multiple functions: it acts as both a second harmonic resonator and a third harmonic resonator. By configuring the resonator with specific electrical length and impedance characteristics, it can resonate at multiple harmonic frequencies and suppress them simultaneously, making a single component serve multiple suppression functions
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
This configuration effectively suppresses both odd and even order harmonics, ensuring efficient signal processing even in constrained spaces where traditional three-line arrangements are not possible.
Implementation Method 1
a coupled line disposed in parallel with each of the transmission line and the stub, and electromagnetically coupled to each of the transmission line and the stub
Implementation Method 2
the stub and the coupled line operate as a first resonator to resonate with an odd order harmonic included in the amplified signal, and the transmission line, the stub, and the coupled line operate as a second resonator to resonate with an even order harmonic included in the amplified signal
Data Source
AI summary
A stub whose end is connected to an end of a transmission line, and a coupled line disposed in parallel with each of the transmission line and the stub, and electromagnetically coupled to each of the transmission line and the stub are included, and the stub and the coupled line operate as a first resonator for resonating with an odd order harmonic included in the amplified signal, and the transmission line, the stub, and the coupled line operate as a second resonator for resonating with an even order harmonic included in the amplified signal.