Triplexer Port Count Minimization in Wireless Circuits
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Solution Overview
Problem
Conventional antenna sharing schemes in wireless electronic devices are complex, bulky, and exhibit undesired radio-frequency signal losses due to the use of switching and filter circuitry, which complicates the routing of signals between radio-frequency transceiver ports and antenna structures, especially when handling multiple communications bands.
Innovation Solution
The implementation of a triplexer with two additional bandpass filters and a common bandpass filter to handle multiple uplink and downlink frequency ranges, minimizing the number of transceiver ports and reducing the complexity and size of filter circuitry by routing signals for multiple adjacent bands through a single transceiver port.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional switching circuitry and filter circuitry are used in antenna sharing schemes to handle multiple communications bands, then the ability to share antenna resources among multiple bands is improved, but the device complexity and size increase, and radio-frequency signal losses occur
Solution Approach 1:
The patent combines multiple filter functions into a single triplexer device that integrates three bandpass filters into one unified structure. This merging approach allows the triplexer to handle three different frequency bands (and by extension, multiple communications bands) while reducing the overall number of separate filter components needed, thereby decreasing device complexity while maintaining adaptability
Solution Approach 2:
The triplexer is designed as a universal component that can handle multiple uplink and downlink frequency ranges across different communications bands. By making the filter circuitry multi-functional, the system can share antenna resources among multiple bands without requiring separate dedicated filters for each band, thus reducing overall system complexity
2Adaptability or versatility
If conventional switching circuitry and filter circuitry are used in antenna sharing schemes to handle multiple communications bands, then the ability to share antenna resources among multiple bands is improved, but the volume and physical size of the device increase
Solution Approach 1:
The patent combines multiple filter functions into a single triplexer device that integrates three bandpass filters into one unified structure. This merging approach allows the triplexer to handle three different frequency bands (and by extension, multiple communications bands) while reducing the overall number of separate filter components needed, thereby decreasing device complexity while maintaining adaptability
Solution Approach 2:
The triplexer is designed as a universal component that can handle multiple uplink and downlink frequency ranges across different communications bands. By making the filter circuitry multi-functional, the system can share antenna resources among multiple bands without requiring separate dedicated filters for each band, thus reducing overall system complexity
3Adaptability or versatility
If conventional switching circuitry and filter circuitry are used in antenna sharing schemes, then antenna resource sharing among multiple bands is enabled, but undesired radio-frequency signal losses occur
Solution Approach 1:
The patent extracts and eliminates the switching circuitry from the signal path by using the triplexer's passive filter-based routing mechanism. By removing the active switching components that cause insertion losses, the system achieves antenna sharing functionality while minimizing radio-frequency signal losses through the use of passive, lossless filter networks
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
This configuration minimizes the number of transceiver ports, reduces signal losses, and improves reception quality, leading to a more compact and cost-effective wireless communications circuitry that maintains cellular band coverage without increasing port counts.
Implementation Method 1
Signals in the two downlink frequency ranges may pass through a common bandpass filter in a triplexer. Two additional bandpass filters in the triplexer may be used to respectively handle the two uplink frequency ranges.
Data Source
AI summary
An electronic device has wireless communications circuitry including a triplexer. The wireless communications circuitry may be used in first and second modes. In the first mode, the device communicates in a first communications band using a transmitter in a first uplink frequency range associated with the first communications band and using a receiver in a first downlink frequency range associated with the first communications band. In the second mode, the device communicates in a second communications band using a transmitter to transmit in a second uplink frequency range associated with the second communications band and using the receiver to receive in a second downlink frequency range associated with the second communications band. Signals in the two downlink frequency ranges may pass through a common bandpass filter in the triplexer. Two additional bandpass filters in the triplexer may be used to respectively handle the two uplink frequency ranges.