Shared Driver Power Amplifier Matching for Multi-Band RF Gain

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current power amplifiers for wireless communication, particularly in multi-mode and multi-frequency environments, face challenges with complex structures, large size, and low space utilization due to the need to support multiple network systems and frequency bands, leading to limited amplification gain and inefficient signal processing across varying frequency bands.

Innovation Solution

A power control device and method that includes a controller, a driving element, an adjustable inter-stage matching circuit, and a power stage amplification circuit, where the controller determines a target frequency band and selects the corresponding inter-stage matching circuit and power amplifier, allowing the driving element to pre-amplify and the power stage to amplify signals efficiently across multiple frequency bands, sharing a single driving element for all bands.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple power amplifiers are integrated to support multi-mode and multi-frequency, then the power amplifier can support multiple network systems and frequency bands, but the device complexity and size increase

Engineering Contradiction:

Improvesupport for multiple network systems and frequency bandsVSAvoidstructure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements a shared driving element that can operate across multiple frequency bands by dynamically adjusting the inter-stage matching circuit. This single driving element replaces what would traditionally require multiple dedicated power amplifiers, allowing the system to support multiple network systems and frequency bands while reducing device complexity. The matching circuit is configured with multiple switching paths, each optimized for different frequency bands, enabling the universal driving element to adapt its impedance matching characteristics based on the operating frequency.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple power amplifiers are integrated to support multi-mode and multi-frequency, then the power amplifier can support multiple network systems and frequency bands, but the device size increases

Engineering Contradiction:

Improvesupport for multiple network systems and frequency bandsVSAvoiddevice size

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent merges multiple power amplifier functions into a single integrated structure. The driving element is shared across all frequency bands, and the inter-stage matching circuit combines multiple matching networks with switching mechanisms. This consolidation reduces the overall device area compared to having separate power amplifiers for each frequency band, while still maintaining the capability to support multiple network systems and frequency bands through dynamic circuit reconfiguration.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

Engineering Contradiction:

Improvesupport for multiple network systems and frequency bandsVSAvoidspace utilization

Core Design Contradiction:

Adaptability or versatilityVSVolume of stationary object

Solution Approach 1:

The shared driving element serves multiple frequency bands simultaneously, maximizing space utilization. Instead of dedicating separate amplifier volumes to each frequency band, the universal driving element is paired with a multi-configuration matching circuit that adapts its impedance characteristics. This approach significantly improves space utilization while maintaining support for multiple network systems and frequency bands.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Adaptability or versatility

Engineering Contradiction:

Improvesupport for multiple network systems and frequency bandsVSAvoidamplification gain

Core Design Contradiction:

Adaptability or versatilityVSPower

Solution Approach 1:

The patent applies local quality optimization by designing the inter-stage matching circuit with frequency-specific impedance transformation characteristics. Each switching path in the matching circuit is optimized for a particular frequency band, ensuring that the driving element operates at maximum efficiency and amplification gain for each specific band. This localized optimization allows the single driving element to achieve high gain performance across multiple frequency bands, comparable to or exceeding what could be achieved with multiple amplifiers.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11777458B2Power control device and method, and storage medium

Publication Date: 2023.10.03 GUANGZHOU HUIZHI MICROELECTRONICS

AI summary

A power control device includes: a controller configured to, when a frequency band selection instruction is detected, determine a target frequency band from the frequency band selection instruction in response to the frequency band selection instruction; and to determine, based on the target frequency band, a target inter-stage matching circuit of a path from a plurality of inter-stage matching circuits; a driving element configured to, when an input power signal within the target frequency band is received, pre-amplify the input power signal to obtain a pre-amplified power signal and transmit the pre-amplified power signal to the target inter-stage matching circuit; the target inter-stage matching circuit configured to process the pre-amplified power signal to obtain an intermediate input signal and provide the intermediate input signal to a power stage amplification circuit; the power stage amplification circuit configured to amplify the intermediate input signal to obtain an output power signal.