Waveguide Diplexer with Bent Highpass Filter for Compact Satellite Transceivers
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Solution Overview
Problem
Existing satellite communication transceivers face challenges in reducing dimension and weight, simplifying assembly, enhancing signal quality, and lowering production costs due to complex assembly procedures and inadequate signal isolation in existing diplexers.
Innovation Solution
A diplexer with a bent highpass filter and corrugated transformers that reduce the device's dimensions and weight, while improving signal isolation through a meandering shape and adjustable corrugations, simplifying assembly, and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a conventional diplexer structure is used, then signal transmission function is achieved, but the dimension and weight of the satellite communication transceiver are large
Solution Approach 1:
The highpass filter in the diplexer is bent into a meandering shape, transforming the straight linear structure into a curved compact configuration. This curvature allows the filter to maintain its functional length for signal filtering while occupying significantly less linear space, thereby reducing the overall dimension and weight of the satellite communication transceiver without compromising the filtering performance
Solution Approach 2:
The meandering highpass filter is positioned and integrated within the compact diplexer structure, allowing components to be nested or closely packed together. The bent filter path enables it to fit within the available space alongside the power divider and lowpass filter, creating a compact nested arrangement that minimizes the overall device footprint while maintaining all necessary functional elements
2Reliability
If an asymmetric diplexer structure is used, then signal isolation is improved, but assembly procedures become complicated and production cost increases
Solution Approach 1:
The diplexer employs an asymmetric configuration where the highpass filter is bent into a meandering shape with specific geometric asymmetry. This asymmetric design creates effective signal isolation by preventing signal leakage between ports while maintaining a compact form factor. The asymmetric structure is designed to be manufacturable as a single integrated piece, avoiding the need for complex multi-part assemblies
Solution Approach 2:
The diplexer structure integrates the power divider, lowpass filter, and bent highpass filter into a unified compact design. By merging these components into a closely integrated structure with the highpass filter bent to fit within the same footprint, the design achieves good signal isolation without requiring multiple separate parts or complex assembly procedures, thereby simplifying manufacturing while maintaining performance
3Volume of moving object
If the highpass filter is bent into a meandering shape, then the dimension of the diplexer is reduced, but the manufacturing precision requirement increases
Solution Approach 1:
The highpass filter is bent into a meandering shape with smooth continuous curves rather than sharp angles or complex geometries. This curved design reduces the volume occupied by the filter while using straightforward bending geometries that are within standard manufacturing tolerances, avoiding the need for extremely precise complex shapes that would be difficult and expensive to manufacture
Solution Approach 2:
The meandering shape of the highpass filter incorporates adjustable geometric parameters such as bend radius, segment length, and number of meanders. These parameters can be optimized during the design phase to achieve the desired volume reduction while keeping the manufacturing precision requirements within practical limits. The design allows for parameter adjustment to balance compactness with manufacturability
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 solution effectively reduces the size and weight of the satellite communication transceiver, enhances signal isolation, and simplifies assembly, ensuring better durability and safety while lowering production costs.
Implementation Method 1
a highpass filter coupled to the connecting port for filtering out the first ortho-polarized reception signal and transmitting the transmitting signal
Implementation Method 2
a first lowpass filter coupled to the power divider for filtering out the transmitting signal and transmitting the first ortho-polarized reception signal
Implementation Method 3
a power divider for transmitting a transmitting signal and a first ortho-polarized reception signal
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A diplexer (13) for a waveguide (10) includes a power divider (131) for transmitting a transmitting signal (TX) and a first ortho-polarized receiving signal (RX1), a first lowpass filter (134) coupled to the power divider (131) for filtering out the transmitting signal (TX) and transmitting the first ortho-polarized receiving signal (RX1) a connecting port (132) coupled to the power divider (131) and having a first bend (B1) for transmitting the transmitting signal (TX), and a highpass filter (133) coupled to the connecting port (132) for filtering out the first ortho-polarized receiving signal (RX1) and transmitting the transmitting signal (TX).