Dual-Polarization Filter Module Using Shared Resonator Modes
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Solution Overview
Problem
The integration of multiple filters for each polarization signal in a planar antenna increases the number of components and complicates the module configuration, especially in small form factor applications like millimeter-wave bands, where space is limited.
Innovation Solution
A filter and antenna module design that uses a single resonator group to excite perpendicular excitation modes for each polarization signal, reducing the number of filters needed by sharing a housing and maintaining isolation between signal paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter is individually provided for each polarization signal path, then filter performance for each polarization is improved, but the number of components increases and module configuration becomes complicated
Solution Approach 1:
The patent combines multiple filters for different polarization signals into a single integrated filter structure. The filter includes multiple resonators that can simultaneously handle multiple polarization signals, reducing the total number of filter components while maintaining the filtering performance for each polarization path.
Solution Approach 2:
The filter is designed with multi-functional capability to process multiple polarization signals through a single device. The resonators are configured to respond to different polarization modes, allowing one filter to perform the function of multiple separate filters, thereby simplifying the module configuration.
2Reliability
If multiple filters are mounted for each polarization signal, then signal filtering capability is improved, but the module size increases
Solution Approach 1:
Multiple filter functions are merged into a single compact filter assembly that occupies less space than multiple separate filters. The integrated design allows multiple polarization signals to be filtered within a unified structure, reducing the overall module footprint.
Solution Approach 2:
The filter structure employs a nested arrangement where multiple resonators and filtering elements are positioned within a compact, space-efficient configuration. This nesting allows multiple filtering functions to coexist in a smaller volume, reducing the module size while maintaining filtering capability.
3Area of stationary object
If a compact module design is implemented, then module size is reduced, but the number of components to be integrated increases
Solution Approach 1:
The patent merges multiple filter components into a single integrated filter unit, reducing the number of discrete components that need to be mounted and integrated. This consolidation maintains the necessary filtering functions while simplifying the integration process in compact module designs.
Solution Approach 2:
The integrated filter is designed with universal functionality to handle multiple polarization signals simultaneously, reducing the need for multiple specialized components. This multi-functional approach decreases the total component count while maintaining comprehensive signal processing capability in a compact form factor.
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 design allows for a compact antenna module with reduced components and improved flexibility in design, effectively handling multiple polarization signals while suppressing unnecessary emissions and maintaining high isolation.
Implementation Method 1
a resonator group including a plurality of resonators, in which the resonator group excites a first excitation mode and a second excitation mode perpendicular to each other by the input first and second polarization signals
Data Source
AI summary
A filter according to the present disclosure includes input means for inputting a first polarization signal and a second polarization signal that are input from an antenna. The filter includes output means for outputting a first output signal corresponding to the first polarization signal and a second output signal corresponding to the second polarization signal, the first and the second output signals having been subjected to filter processing for making a desired frequency electric signal of each of the first and the second polarization signals pass through the first and the second output signals, respectively. The filter includes a resonator group that excites a first excitation mode and a second excitation mode perpendicular to each other by the input first and second polarization signals, whereby the output means outputs the first and the second output signals corresponding to the first and second polarization signals, respectively.