Antenna Waveguide Transitions for SSPA Thermal and Bandwidth Management

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Solution Overview

Problem

Conventional solid state power amplifiers (SSPAs) face limitations in broadband power amplification due to bandwidth limitations and power handling constraints in waveguide transitions, as well as thermal dissipation challenges, which affect their efficiency and reliability.

Innovation Solution

The implementation of antenna waveguide transitions with bandwidth-matched and thermally coupled antenna structures, including signal and ground conductors, within a waveguide channel to enhance broadband coupling and thermal dissipation for improved SSPA performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional waveguide transitions are used in SSPAs, then the structure is simple, but bandwidth limitations and power handling constraints occur

Engineering Contradiction:

ImprovebandwidthVSAvoidwaveguide transition structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The waveguide transition is divided into multiple sections with different impedance transformations. Each section is designed to handle specific frequency ranges and power levels, allowing the overall structure to achieve broadband operation while maintaining manageable complexity through modular design

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the waveguide transition are designed with locally optimized properties - some sections focus on impedance matching for bandwidth, while other sections are optimized for power handling and thermal dissipation. This allows each local region to address specific requirements without compromising overall performance

Inventive Principle:

Principle #3Local quality

2Temperature

If conventional waveguide transitions are used, then manufacturing is easier, but thermal dissipation challenges occur

Engineering Contradiction:

Improvethermal dissipationVSAvoidwaveguide transition manufacturing

Core Design Contradiction:

TemperatureVSEase of manufacture

Solution Approach 1:

The waveguide transition structure is merged with thermal management features, where the transition components also serve as heat dissipation pathways. The signal conductors and ground conductors are thermally coupled to heat sinks integrated into the waveguide structure, simultaneously achieving electrical function and thermal management

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

Thermal dissipation is addressed by adding a thermal dimension to the conventional two-dimensional waveguide structure. Heat sinks and thermal pathways extend in the vertical dimension, providing enhanced cooling capability without interfering with the horizontal signal propagation path

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Adaptability or versatility

If bandwidth-matched antenna structures are implemented, then broadband coupling is improved, but device complexity increases

Engineering Contradiction:

Improvebroadband couplingVSAvoidantenna structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The antenna structures are designed to perform multiple functions simultaneously - impedance matching across broadband, signal transmission, and thermal dissipation. This multi-functionality achieves broadband coupling improvement while limiting complexity growth by consolidating functions into unified structures

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

This solution enables improved broadband coupling and thermal dissipation, leading to enhanced efficiency and reliability in SSPAs, capable of handling higher power and frequency ranges with reduced size and weight.

Implementation Method 1

a waveguide channel configured to propagate an input signal from an input port to the solid state amplifier and configured to propagate an amplified signal from the solid state amplifier to the output port

Methodology Applied

Scientific EffectElectromagnetic wave propagation: Electromagnetic Induction

Implementation Method 2

Waveguide transitions to and from the solid state amplifier may be bandwidth matched to the waveguide channel

Methodology Applied

Scientific EffectImpedance matching:

Implementation Method 3

the waveguide transitions may be thermally coupled to the waveguide channel

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS11431294B2Antenna waveguide transitions for solid state power amplifiers

Publication Date: 2022.08.30 QORVO US INC

AI summary

Antenna waveguide transitions for solid state power amplifiers (SSPAs) are disclosed. An SSPA includes a waveguide channel that is configured to propagate an input signal, such as an electromagnetic signal, from an input port to a solid state amplifier for amplification. The waveguide channel is further configured to propagate an amplified signal from the solid state amplifier to an output port. Waveguide transitions to and from the solid state amplifier are bandwidth matched to the waveguide channel. Additionally, the waveguide transitions may be thermally coupled to the waveguide channel. The waveguide transitions may include antenna structures that have a signal conductor and a ground conductor. In this manner, the SSPA may have improved broadband coupling as well as improved thermal dissipation for heat generated by the solid state amplifier.