RF Circuit Switching Around a Divider to Cut 6 GHz Power Loss

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Solution Overview

Problem

Existing radio frequency circuits experience degraded transmission signal quality and receiving sensibility due to the use of dividers, which cause power loss.

Innovation Solution

The proposed radio frequency circuit incorporates a multiplexer with filters having different passbands and switches to bypass the divider, allowing for improved signal quality and sensibility by reducing power loss.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a divider is used in the radio frequency circuit, then the circuit can handle multiple frequency bands, but the transmission signal quality and receiving sensibility are degraded due to power loss

Engineering Contradiction:
Improvefrequency band handling capabilityVSAvoidpower loss
Core Design Contradiction:
Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The patent implements dynamic switching between different circuit configurations using switches. The circuit can dynamically select between using the divider for multi-band handling or bypassing the divider to minimize power loss, depending on the operational requirements. This dynamic adaptability resolves the contradiction by making the system flexible rather than static.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent segments the radio frequency circuit into multiple paths: one path through the divider for frequency band separation, and another bypass path for direct signal transmission. This segmentation allows the circuit to handle multiple frequency bands when needed while avoiding power loss in other scenarios, thus resolving the technical contradiction.

Inventive Principle:
Principle #1Segmentation

2Adaptability or versatility

If a divider is used to enable unlicensed band usage, then the circuit supports NR-U band, but the transmission signal quality is degraded

Engineering Contradiction:
Improveunlicensed band supportVSAvoidtransmission signal quality
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The circuit employs dynamic switching mechanisms that allow it to adapt between different operational modes. When unlicensed band support is required, the divider path is activated; when transmission signal quality is prioritized, the bypass path is used. This dynamic behavior resolves the contradiction between adaptability and reliability.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent applies different circuit configurations to different signal paths locally. The divider is used only where frequency band separation is needed, while other paths maintain direct connections for high-quality transmission. This localized application of different circuit qualities resolves the contradiction by optimizing each path for its specific function.

Inventive Principle:
Principle #3Local quality

3Power

If the 6-GHz licensed band is used requiring higher output power, then the communication range is extended, but power loss in the divider reduces efficiency

Engineering Contradiction:
Improveoutput powerVSAvoidpower loss
Core Design Contradiction:
PowerVSLoss of energy

Solution Approach 1:

The circuit implements dynamic path selection that switches between the divider path and bypass path based on operational requirements. When high output power is needed for extended communication range, the bypass path minimizes power loss. This dynamic adaptation resolves the contradiction between achieving high output power and minimizing energy loss.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent extracts the problematic divider component from the signal path when high power transmission is required. By providing a bypass path that removes the divider from the critical 6-GHz transmission path, the system eliminates the source of power loss while maintaining the capability to use the divider when frequency band handling is needed, thus resolving the technical contradiction.

Inventive Principle:
Principle #2Taking out (Extraction)

Data Source

PatentUS20250038772A1Radio frequency circuit
Publication Date: 2025.01.30 MURATA MFG CO LTD
  • US20250038772A1 patent drawing
  • US20250038772A1 patent drawing
  • US20250038772A1 patent drawing

AI summary

A radio frequency circuit includes a divider including a first, second, and third terminals. A first multiplexer includes a first filter having a first passband and a second filter having a second, higher passband. A first switch includes a first terminal, a second terminal connected to the first terminal of the divider, and a third terminal connected to first ends of the first and second filters. A second switch includes a first terminal, a second terminal connected to the third terminal of the divider, and a third terminal connected to a second end of the first filter. A third filter has a WLAN passband, and a first amplifier is connected to a first end of the third filter. The first terminal of the first switch is connected to the first amplifier or the first terminal of the second switch is connected to a second end of the third filter.