Lattice Ground Panel for Power Amplifier Noise Suppression
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Solution Overview
Problem
Conventional power amplifiers in communication systems suffer from inefficiency due to the need for multiple modules like variable attenuators and phase shifters to remove noise frequency signals, which degrades their performance.
Innovation Solution
A power amplification apparatus featuring a lattice panel grounded on the amplifier's ground plane with specific etched and copperplate portions, designed to block noise frequency components, thereby enhancing efficiency without the need for additional modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a feedforward linearization circuit is used to remove noise frequency signals, then linearity is improved, but device complexity increases due to multiple modules
Solution Approach 1:
The patent combines multiple separate modules (variable attenuators, phase shifters, delay lines, error amplifier) into a single integrated feedforward linearization circuit. This merging maintains the linearity improvement function while reducing device complexity by eliminating the need for multiple discrete components.
Solution Approach 2:
The feedforward linearization circuit is designed to perform multiple functions simultaneously: noise frequency signal detection, phase shifting, attenuation control, and cancellation. This multi-functionality allows a single circuit to replace multiple separate modules, reducing overall device complexity while maintaining linearity performance.
2Reliability
If variable attenuators and phase shifters are used to cancel noise frequency signals, then noise removal is improved, but manufacturing complexity increases
Solution Approach 1:
The patent integrates variable attenuators and phase shifters into a unified feedforward linearization circuit structure. This integration simplifies manufacturing by reducing the number of separate components that need to be assembled and calibrated, while maintaining the noise removal capability through the coordinated operation of the integrated elements.
3Reliability
If multiple modules are used for signal processing and noise cancellation, then noise frequency signal removal is improved, but the amplifier efficiency deteriorates
Solution Approach 1:
The feedforward linearization circuit performs preliminary processing of the noise frequency signal by detecting and pre-canceling it before the main amplification stage. This preliminary action prevents the noise from being amplified along with the desired signal, thereby improving amplifier efficiency while maintaining effective noise removal.
Data Source
AI summary
Disclosed is a power amplification apparatus in a communication system. The apparatus includes a high power amplifier for amplifying an input signal; and a lattice panel, one surface of which is in contact with a ground plane of the high power amplifier, the one surface including a first line and a second line. The first line has at least two first etched portions and at least one first copperplate portion, the first copperplate portion being positioned between the first etched portions, and the first copperplate portion being formed at an interval ofλ04,and the second line has at least two second etched portions and at least one second copperplate portion, the second copperplate portion being positioned between the second etched portions, and the second copperplate portion being formed at an interval ofλ0′4.