Integrated Ceramic Waveguide Duplexer With Reduced Part Count
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Solution Overview
Problem
Conventional E-plane filters and duplexers are complex and costly to manufacture due to their multi-part structure, which increases the part count and complexity, making them inefficient and expensive.
Innovation Solution
The proposed solution involves a duplexer structure comprising two ceramic waveguide filters connected through a union of dielectric blocks with metallic coatings, forming septa and windows that eliminate the need for separate septa and reduce the part count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional E-plane filters with metallic septa and windows are used, then the filter can be manufactured with separate parts, but the part count increases and manufacturing complexity increases
Solution Approach 1:
The patent combines the metallic septum and window structures into a single integrated ceramic component. The ceramic filter element includes both the septum and window features as part of its monolithic structure, eliminating the need for separate metallic parts that would otherwise need to be assembled together. This integration directly reduces part count and simplifies manufacturing.
Solution Approach 2:
The ceramic filter element serves multiple functions simultaneously: it provides filtering, acts as a septum structure, and incorporates window features. This multi-functionality eliminates the need for separate specialized components, reducing overall device complexity while maintaining all necessary functions.
2Ease of manufacture
If conventional E-plane filters with multiple separate parts are used, then each part can be manufactured independently, but the assembly complexity and cost increase
Solution Approach 1:
The patent merges the septum and window structures into the ceramic filter element itself, creating a single manufacturable unit. This eliminates the assembly steps required to join separate metallic septa and windows to the filter housing, significantly reducing assembly complexity while maintaining independent manufacturing capabilities through ceramic forming processes.
3Reliability
If duplexers consisting of two separate band pass filters are used, then frequency filtering is achieved, but the overall device complexity and cost increase
Solution Approach 1:
The patent combines two band pass filters into a single integrated duplexer structure. The ceramic construction allows both filter functions to be implemented in one unified component rather than requiring two separate filter assemblies, reducing device complexity while maintaining the necessary frequency filtering performance for duplex operation.
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 simplifies the duplexer structure, reduces manufacturing costs, and enhances efficiency by minimizing the number of parts and complexity, while maintaining the frequency properties of the filter.
Implementation Method 1
a first waveguide filter comprising a plurality of windows and a first set of septa extending between the windows and configured to guide an electromagnetic wave between the windows
Implementation Method 2
Filters are electronic devices that allow for the transmission of electromagnetic waves. Filters are typically designed so as to permit at one or more frequencies to pass through the filter, and to substantially prevent other frequencies from passing through the filter.
Implementation Method 3
an inductive loop in communication with the first window and configured to transmit energy from a first port to the first window
Data Source
AI summary
E-plane waveguide duplexers comprising two filters (e.g., one or more E-plane ceramic waveguide filters), and methods for manufacturing the same, are described herein. The duplexer may include a plurality of septa (including a first septum and a second septum) formed by a union of a first dielectric block and a second dielectric block (e.g., ceramic). The first septum and/or the second septum may limit a residual field strength from the loop (e.g., inductive loop) to couple small amounts of energy from the first filter to the second filter (e.g., creating the duplexer). The width of the first septum and/or the second septum may determine the input loading from a first channel of the duplexer to a second channel of the duplexer. Moreover, by reducing the part count of the duplexer and/or decreasing its complexity, the structure of the duplexer may be manufactured more efficiently and its cost may be decreased.