Multiband Receiver Circuit Scale Suppression

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Solution Overview

Problem

Conventional multiband receivers face an increase in circuit scale as the number of radio frequency bands increases, limiting their ability to concurrently receive multiple radio frequency bands efficiently.

Innovation Solution

A receiver design that includes a local signal generator, a power phase adjuster, and a frequency converter, which adjusts local signals in power and phase to concurrently convert frequencies across multiple radio frequency bands, allowing for sorting in a desired frequency range without increasing circuit scale.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If reception circuits are arranged corresponding to radio frequency bands, then the number of concurrently received radio frequency bands increases, but the circuit scale increases

Engineering Contradiction:

Improvenumber of concurrently received radio frequency bandsVSAvoidcircuit scale

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges multiple reception circuits into a single integrated circuit that can concurrently process multiple radio frequency bands. The frequency converter integrates multiple local oscillators and mixers to convert signals from different frequency bands simultaneously, eliminating the need for separate reception circuits for each band and thus suppressing circuit scale increase.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The frequency converter is designed with multi-functionality to handle multiple radio frequency bands concurrently. By incorporating multiple local oscillators that can generate different frequencies and multiple mixers that can process different frequency bands simultaneously, the single circuit performs the functions of multiple dedicated reception circuits without increasing overall circuit scale.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Device complexity

If the number of radio frequency bands is limited, then the circuit scale is suppressed, but the reception band breadth is limited

Engineering Contradiction:

Improvecircuit scaleVSAvoidreception band breadth

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent employs dynamic frequency conversion capabilities where the local oscillators can be tuned to different frequencies and the mixers can dynamically switch between different frequency bands. This dynamic adaptability allows the circuit to maintain a compact scale while being able to receive and process signals across a broad range of radio frequency bands by reconfiguring the frequency conversion parameters.

Inventive Principle:

Principle #15Dynamics

3Reliability

If reception circuits are arranged for each frequency band, then frequency band reception capability improves, but the circuit scale increases due to increasing number of radio frequency bands

Engineering Contradiction:

Improvefrequency band reception capabilityVSAvoidcircuit scale

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple frequency band reception capabilities into a single integrated frequency converter. Instead of having separate reception circuits for each frequency band, the integrated converter uses multiple local oscillators and mixers that work together to concurrently convert and process signals from multiple frequency bands, maintaining reliable reception capability while suppressing circuit scale increase.

Inventive Principle:

Principle #5Merging (Combining)

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 enables concurrent frequency conversion of signals across multiple radio frequency bands, suppressing the increase in circuit scale and efficiently allocating signals within a narrow frequency interval, thereby supporting a broader range of radio frequency bands without the need for extensive circuit expansion.

Implementation Method 1

a local signal generator that supplies a plurality of local signals

Methodology Applied

Scientific EffectElectromagnetic signal generation:

Implementation Method 2

an adjuster that adjusts local signals in terms of power or relative phases

Methodology Applied

Scientific EffectPower adjustment:

Implementation Method 3

a frequency converter that concurrently converts frequencies, belonging to the plurality of radio frequency bands, by use of the adjusted local signals, thus sorting them in a desired frequency range

Methodology Applied

Scientific EffectFrequency conversion:

Implementation Method 4

a mixer that is connected to an output terminal of the low noise amplifier so as to perform frequency conversion on a plurality of local signals which are combined together with the power combiner

Methodology Applied

Scientific EffectMixing:

Data Source

PatentUS9136893B2Receiver

Publication Date: 2015.09.15 NIPPON TELEGRAPH & TELEPHONE CORP

AI summary

A receiver includes a local signal generator, a power phase adjuster, and a frequency converter so as to perform frequency conversion on signals included in a plurality of radio frequency bands. The local signal generator supplies a plurality of local signals. The power phase adjuster adjusts local signals in terms of signal power or relative phases. The frequency converter performs frequency conversion on radio frequency bands by use of local signals adjusted with the power phase adjuster, thus sorting them in a desired frequency range.