Impedance Matching Filter With Capacitive Coupling for RF Assemblies

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing radio-frequency assemblies face inefficiencies due to the need for separate matching circuits and dedicated blocking capacitors, which result in power losses and increased component count.

Innovation Solution

The proposed radio-frequency assembly incorporates an impedance matching filter with a capacitive input coupling, eliminating the need for separate matching circuits and blocking capacitors. This filter is designed to match the impedance of the semiconductor amplifier output to the RF waveguide, reducing power losses and simplifying the component layout.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If separate matching circuits and blocking capacitors are used, then impedance matching between semiconductor amplifier output and RF waveguide is achieved, but power losses increase and component count increases

Engineering Contradiction:

Improvepower lossesVSAvoidcomponent count

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent combines the impedance matching function and blocking capacitor function into a single integrated filter component. The filter is designed with specific impedance characteristics that simultaneously achieve impedance matching between the semiconductor amplifier output and RF waveguide while providing the necessary DC blocking function, thereby eliminating the need for separate matching circuits and blocking capacitors.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The filter component is designed to perform multiple functions simultaneously: impedance matching, DC blocking, and signal filtering. By making the filter universal and multi-functional, the patent reduces the total number of components required in the RF assembly while maintaining all necessary functions for proper operation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If separate matching circuits are used, then impedance matching is achieved, but the number of components increases

Engineering Contradiction:

Improveimpedance matchingVSAvoidnumber of components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the impedance matching circuit with the filter into a single integrated component. The filter is designed with specific impedance characteristics that achieve proper matching between the semiconductor amplifier output and RF waveguide, eliminating the need for separate matching circuits and reducing component count.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The filter is designed to simultaneously provide impedance matching and signal filtering functions. This multi-functionality approach ensures reliable impedance matching while reducing the total number of components in the system.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Loss of energy

If blocking capacitors are used, then DC components are removed from RF signal, but power losses increase

Engineering Contradiction:

Improvepower lossesVSAvoidDC blocking function

Core Design Contradiction:

Loss of energyVSEase of operation

Solution Approach 1:

The patent combines the DC blocking function with the impedance matching filter into a single integrated component. The filter's capacitive input coupling provides the necessary DC blocking while maintaining proper impedance matching, thereby reducing power losses associated with separate blocking capacitors.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The filter is designed to simultaneously perform DC blocking and impedance matching functions. This multi-functionality eliminates the need for separate blocking capacitors, reducing power losses while maintaining the essential DC blocking capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

The solution improves power efficiency by reducing impedance matching losses and minimizing the number of components, thereby enhancing the overall performance of the radio-frequency assembly.

Implementation Method 1

the impedance matching filter has a capacitive input coupling

Methodology Applied

Scientific EffectCapacitance: Capacitance

Implementation Method 2

A first impedance value at the first interface corresponds to an impedance value at the semiconductor amplifier output... A second impedance value at the second interface corresponds to an impedance value at the RF waveguide

Methodology Applied

Scientific EffectImpedance matching: Electrical Impedance Tomography

Data Source

PatentUS12206386B2Radio-frequency assembly with impedance matching filter

Publication Date: 2025.01.21 TESAT SPACECOM GMBH & CO KG

AI summary

A radio-frequency assembly is described which can be used in communication satellites, for example. The radio-frequency assembly contains a signal source in the form of a semiconductor amplifier output, an impedance matching filter, and a radio-frequency waveguide. The impedance matching filter is connected to the semiconductor amplifier output on the input side and to the radio-frequency waveguide on the output side. The impedance matching filter has a different impedance value on the input side from that on the output side and is matched to the semiconductor amplifier output on the input side and matched to the radio-frequency waveguide on the output side. Consequently, a separate matching circuit between semiconductor amplifier output and radio-frequency waveguide is no longer necessary.