Reconfigurable Low-Noise Amplifier for Multi-Band Impedance Matching

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Solution Overview

Problem

Current wireless communication devices face increased manufacturing costs and product size due to the need to support multiple frequency bands, as they require multiple low noise amplifiers and mixers for various wireless standards, which is inefficient and costly.

Innovation Solution

A communication apparatus and method that uses a gain adjusting unit, combiner, feedback unit, and input matching unit to generate input impedance and reduce noise figure, while employing an output matching unit with switches and capacitors to adjust load impedance for different frequency bands, thereby supporting multiple wireless standards in a single device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple low noise amplifiers and mixers are employed to support various wireless standards, then the device can support multiple frequency bands, but the manufacturing cost and product size increase

Engineering Contradiction:

Improvesupport for multiple frequency bandsVSAvoidnumber of amplifiers and mixers

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements a universal low noise amplifier that can operate across multiple frequency bands (WCDMA, CDMA2000, Wibro, Bluetooth, Zigbee, WLAN) using a single amplifier structure with reconfigurable impedance matching networks, eliminating the need for multiple dedicated amplifiers for different standards

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent employs dynamically reconfigurable input and output impedance matching networks that can adjust their impedance characteristics based on the operating frequency band, allowing a single LNA to adapt to different wireless standards through electronic reconfiguration rather than requiring fixed hardware for each band

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If multiple low noise amplifiers and mixers are employed to support various wireless standards, then the device can support multiple frequency bands, but the manufacturing cost increases

Engineering Contradiction:

Improvesupport for multiple frequency bandsVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines multiple frequency band support capabilities into a single integrated LNA circuit with shared impedance matching components, reducing the total component count and manufacturing complexity compared to using separate amplifiers for each wireless standard

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS8078126B2Communication apparatus and low noise amplifying method

Publication Date: 2011.12.13 SAMSUNG ELECTRONICS CO LTD

AI summary

A communication apparatus and a low noise amplifying method. The communication apparatus includes a gain adjusting unit to adjust a gain of an input signal; a combiner to generate an output signal using the signal gain-adjusted at the gain adjusting unit; and a feedback unit which provides a feedback signal, which is generated using the output signal generated at the combiner, to an input stage. Accordingly, various frequency bands defined in the wireless standards can be supported. Since the load impedance is generated without resistance, the manufacturing cost and the product size can be reduced.