Transmission-Line Filter With Multi-Resonant Circuits for 5G Bandwidth
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Solution Overview
Problem
Existing signal filters, particularly transmission-line filters, struggle to handle wideband signals required for 5G wireless communications due to limitations in bandwidth and increased insertion loss, making them inadequate for efficient data transmission in portable devices.
Innovation Solution
The implementation of a transmission-line filter with multiple transmission-line base units, each incorporating a multi-resonant circuit that generates additional poles in the S(1,1) performance response, allowing for wider bandwidth filtering without significant increases in insertion loss, achieved by using components such as capacitors and inductors to create multiple resonant frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If existing transmission-line filters are used for 5G wireless communications, then the device structure is simple, but the bandwidth is insufficient and insertion loss increases
Solution Approach 1:
The filter is divided into multiple transmission-line base units, each with its own resonant circuit. This segmentation allows each unit to contribute to the overall bandwidth while maintaining a relatively simple individual structure, resolving the contradiction between structural simplicity and bandwidth requirements for 5G communications.
Solution Approach 2:
Multiple transmission-line base units are combined in parallel between the input and output ports. This merging of multiple simple units creates a composite filter structure that achieves wide bandwidth performance while keeping individual component structures simple, suitable for portable 5G devices.
2Device complexity
If existing transmission-line filters are used for 5G wireless communications, then the device structure is simple, but the insertion loss increases
Solution Approach 1:
The filter structure is segmented into multiple base units with resonant circuits. This segmentation allows for optimized signal paths in each unit, reducing overall insertion loss while maintaining structural simplicity. Each resonant circuit is designed to minimize energy loss at its resonant frequency.
Solution Approach 2:
The resonant circuits within each base unit are designed with specific inductance and capacitance values to achieve desired resonant frequencies. By carefully selecting these parameters, the filter achieves low insertion loss in the passband while maintaining a simple overall structure suitable for portable devices.
3Adaptability or versatility
If multiple transmission-line base units with multi-resonant circuits are used, then the bandwidth is widened and insertion loss is reduced, but the device complexity increases
Solution Approach 1:
Multiple transmission-line base units are merged in parallel between input and output ports. This merging approach allows the filter to achieve wide bandwidth performance through the combined effect of multiple resonant circuits, while the parallel configuration keeps the overall structure relatively compact and manageable.
Solution Approach 2:
Each transmission-line base unit serves multiple functions: it provides frequency-selective filtering, contributes to bandwidth extension, and maintains low insertion loss through its resonant circuit. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in overall device complexity.
4Manufacturing precision
If multiple transmission-line base units with multi-resonant circuits are used, then the filter skirt sharpness is improved and out-of-band attenuation is enhanced, but the device complexity increases
Solution Approach 1:
The filter is segmented into multiple base units, each contributing to the overall frequency response. This segmentation allows for sharper roll-off characteristics as each resonant circuit creates a pole in the transfer function, accumulating to produce steeper filter skirts while keeping individual unit structures simple.
Solution Approach 2:
Multiple resonant circuits are merged in parallel, and their combined effect produces enhanced out-of-band attenuation and sharper filter skirts. The merging of these circuits achieves improved filtering performance without requiring each individual circuit to be overly complex.
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 approach enables wider bandwidths to be filtered effectively while maintaining low insertion loss, supporting the requirements of 5G wireless standards and enhancing the performance of portable devices by allowing for sharper filter skirts and improved out-of-band attenuation.
Implementation Method 1
At least one transmission-line base unit of the multiple transmission-line base units includes a multi-resonant circuit
Implementation Method 2
propagating the incoming signal from the input port along at least one signal pathway to an output port
Data Source
AI summary
Transmission-line filtering with enhanced frequency response is disclosed. In an example aspect, an apparatus includes a transmission-line filter to enhance a frequency response of a filtering operation. The transmission-line filter includes an input port, an output port, and multiple transmission-line base units. The multiple transmission-line base units are disposed between the input port and the output port and are coupled to the input port and the output port. Each of the multiple transmission-line base units includes a respective transmission line of multiple transmission lines. At least one transmission-line base unit of the multiple transmission-line base units includes a multi-resonant circuit.