RF Amplifier Coupler Layout for Lower Insertion Loss

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Solution Overview

Problem

Conventional radio frequency circuits face issues with coupling loss due to couplers, which reduce signal power and occupy additional space, necessitating a solution to minimize insertion loss and circuit area.

Innovation Solution

The amplification device incorporates an amplification unit, a coupler, and additional elements like inductive and capacitive components to reduce coupling loss and circuit area by adjusting impedance and phase through electromagnetic induction, with parallel configurations and wire bonding across multiple dies to enhance matching values.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a coupler is used to amplify and process signals in a radio frequency circuit, then signal processing capability is improved, but coupling loss increases and signal power decreases

Engineering Contradiction:

Improvesignal processing capabilityVSAvoidcoupling loss

Core Design Contradiction:

Ease of operationVSLoss of energy

Solution Approach 1:

An inductive element is introduced as an intermediary component coupled between the amplification unit and the coupler. This inductive element acts as a mediator that adjusts impedance matching and reduces the harmful coupling loss effect, thereby maintaining signal power while enabling effective signal processing through the coupler.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the electrical parameters (impedance, inductance) by introducing an inductive element with specific inductance value. This parameter change optimizes the circuit configuration to reduce coupling loss and improve the overall signal transmission efficiency through the coupler.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If a coupler and matching circuit are added to amplify and process signals, then signal processing capability is improved, but circuit area increases

Engineering Contradiction:

Improvesignal processing capabilityVSAvoidcircuit area

Core Design Contradiction:

Ease of operationVSArea of stationary object

Solution Approach 1:

The inductive element is integrated into the existing coupler circuit structure, merging its impedance-matching function with the coupler's signal processing function. This combination reduces the need for separate matching circuits, thereby reducing overall circuit area while maintaining signal processing capability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The inductive element serves multiple functions simultaneously: it acts as an impedance-matching component, a signal coupling element, and a loss-reduction device. This multi-functionality eliminates the need for additional dedicated components, reducing circuit area while maintaining comprehensive signal processing capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If additional matching circuit and coupler components are included, then signal quality is improved, but insertion loss increases

Engineering Contradiction:

Improvesignal qualityVSAvoidinsertion loss

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The inductive element functions as an intermediary that mediates between the amplification unit and the coupler, optimizing impedance matching and minimizing reflection losses. This intermediary action improves signal quality by reducing standing waves and impedance mismatches while keeping insertion loss to a minimum.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

By adjusting the inductance parameter of the inductive element, the circuit achieves optimal impedance matching conditions. This parameter optimization reduces insertion loss across the operating frequency range while maintaining high signal quality through improved matching.

Inventive Principle:

Principle #35Parameter changes

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 effectively reduces coupling loss and circuit area, supporting higher frequencies and improving electrical characteristics, such as output power and flexibility in design and process.

Implementation Method 1

inductive and capacitive components to reduce coupling loss and circuit area by adjusting impedance and phase through electromagnetic induction

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS12525931B2Amplification device including an amplification unit and a coupler used to reduce insertion loss and circuit area

Publication Date: 2026.01.13 RICHWAVE TECH CORP

AI summary

An amplification device includes a signal input terminal, a signal output terminal, an amplification unit, a coupler, an inductive element and a capacitive element. The amplification unit includes an input terminal and an output terminal, where the input terminal is coupled to the signal input terminal. The coupler includes an input terminal, an output terminal and a coupling terminal, where the input terminal is coupled to the output terminal of the amplification unit, and the output terminal is coupled to the signal output terminal. The inductive element is coupled to the coupler in parallel and includes a first terminal and a second terminal, where the first terminal is coupled to the output terminal of the amplification unit, and the second terminal is coupled to the output terminal of the coupler. The capacitive element is coupled between the output terminal of the coupler and a reference voltage terminal.