3P3T Diode Switch Topology for Compact Multi-Band Signal Routing

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Solution Overview

Problem

Existing communication devices require multiple paths to handle various frequency bands, leading to expensive and space-wasteful designs, particularly with single-pole double-throw (SPDT) and double-pole double-throw (DPDT) switches, necessitating a compact three-pole three-throw (3P3T) switch solution.

Innovation Solution

A 3P3T switch design utilizing six diodes connected in series to form a circular loop with inductors and capacitors for control signal management, allowing for compact size and reduced costs, with a truth table controlling signal paths between poles and throws.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple SPDT and DPDT switches are designed to form a 3P3T switch, then the signal transmission capability across frequency bands is improved, but the device size and cost increase

Engineering Contradiction:

Improvesignal transmission capabilityVSAvoiddevice size

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The patent combines multiple switch functions into a single integrated 3P3T switch device. Instead of using separate SPDT and DPDT switches, the invention merges their functionalities into one compact unit with three poles and three throws, achieving the same signal routing capability while reducing overall device size and component count.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The 3P3T switch is designed to handle multiple frequency bands and signal paths simultaneously through its three poles and three throws configuration. Each pole can be independently controlled to connect to different throws, providing universal signal switching capability across multiple bands without requiring separate switches for each function.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple SPDT and DPDT switches are designed to form a 3P3T switch, then the signal transmission capability across frequency bands is improved, but the manufacturing cost increases

Engineering Contradiction:

Improvesignal transmission capabilityVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

3Volume of moving object

If a compact 3P3T switch design is implemented, then the device size is reduced, but the control signal management complexity increases

Engineering Contradiction:

Improvedevice sizeVSAvoidcontrol signal management

Core Design Contradiction:

Volume of moving objectVSDevice complexity

Solution Approach 1:

The control signal management is segmented into three independent control lines, each corresponding to one pole of the switch. This segmentation allows each pole to be controlled independently with simple binary signals, reducing the overall control complexity despite the multi-path signal routing capability provided by the three poles and three throws configuration.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS8299843B2Three-pole three-throw switch and communication device

Publication Date: 2012.10.30 SHENZHEN FULIAN FUGUI PRECISION INDUSTRY CO LTD

AI summary

A three-pole three-throw switch and a communication device employing the three-pole three-throw switch includes six diodes and six inductors. The six diodes are connected in series with a same direction. Common nodes of each two diodes form three poles and three throws. The three poles and the three throws are linked together in circular form. The three poles and the three throws receive control signals via the six inductor, respectively.