Triple Inductor Transformer Layout for Multiband Port Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current diplexers and duplexers in wireless communications systems require separate components for each radio frequency band and transmission technology, leading to increased size and cost, and suffer from electromagnetic coupling issues that affect performance.
Innovation Solution
A triple inductor transformer is integrated into diplexers or duplexers, featuring a first inductor with a shared port and second and third inductors oriented at different angles to reduce magnetic coupling, allowing for independent signal transmission and reception across multiple bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate components are used for each radio frequency band and transmission technology, then reliability and performance are improved, but device size and cost increase
Solution Approach 1:
The patent combines multiple separate diplexer/duplexer components into a single integrated triple inductor transformer that handles multiple radio frequency bands and transmission technologies simultaneously. The three inductors are magnetically coupled to provide separate signal paths for different frequency bands, eliminating the need for multiple discrete components while maintaining performance.
Solution Approach 2:
The triple inductor transformer is designed to perform multiple functions within a single device, supporting both diplexer and duplexer operations across multiple frequency bands. The structure enables simultaneous handling of different transmission technologies (e.g., LTE, WiFi, Bluetooth) through its three magnetically coupled inductors, each configured for specific frequency ranges.
2Reliability
If separate components are used for each radio frequency band and transmission technology, then reliability and performance are improved, but device cost increases
Solution Approach 1:
The patent combines multiple separate diplexer/duplexer components into a single integrated triple inductor transformer that handles multiple radio frequency bands and transmission technologies simultaneously. The three inductors are magnetically coupled to provide separate signal paths for different frequency bands, eliminating the need for multiple discrete components while maintaining performance.
3Ease of operation
If traditional diplexer/duplexer structures are used, then signal transmission is achieved, but electromagnetic coupling between components causes performance degradation
Solution Approach 1:
The patent utilizes magnetic coupling between the three inductors as a beneficial mechanism to achieve signal separation and filtering. By designing the inductors with specific magnetic coupling coefficients, the structure converts what is typically a harmful effect (electromagnetic coupling) into a useful function for frequency-selective signal routing, where the coupled inductors naturally filter different frequency bands without requiring additional shielding or isolation components.
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 triple inductor transformer reduces electromagnetic coupling, minimizes insertion loss, and achieves high isolation between ports, enabling efficient multiband operation while reducing the size and cost of wireless communication devices.
Implementation Method 1
The second inductor includes a first portion configured to permit current flow in a clockwise direction and a second portion configured to permit current flow in a counter-clockwise direction. The counter-clockwise direction is opposite the clockwise direction to reduce magnetic coupling between the second inductor and the third inductor based on magnetic coupling cancellation.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A transformer has a first inductor that includes a first port. The transformer also has a second inductor magnetically coupled to the first inductor. The second inductor includes a second port. The second inductor includes a first portion configured to permit current flow in a clockwise direction and a second portion configured to permit current flow in a counter-clockwise direction. The transformer also has a third inductor magnetically coupled to the first inductor. The third inductor includes a third port. The counter-clockwise direction is opposite the clockwise direction to reduce magnetic coupling between the second inductor and the third inductor based on magnetic coupling cancellation.