Rectangular-to-Circular Mode Power Combiner
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Solution Overview
Problem
Existing waveguide power dividers and combiners, such as the Magic-Tee, require extensive backshort tuning and additional volume, leading to increased manufacturing costs and insertion loss, and are not efficient for high power signal handling in high frequency systems.
Innovation Solution
A power combiner that integrates rectangular waveguide ports with a circular waveguide port via a transition body, allowing for efficient conversion between rectangular and circular modes to combine or divide RF signals with minimal loss, and is used in antenna feed systems to provide a compact and reliable solution for high power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Magic-Tee waveguide power dividers are used, then power division and combination can be achieved, but extensive backshort tuning is required at each port which increases manufacturing costs and insertion loss
Solution Approach 1:
The patent removes the backshort tuning elements from the Magic-Tee structure, extracting the problematic component that caused manufacturing complexity and cost. The invention achieves power division and combination without requiring backshort tuning at each port, thereby reducing manufacturing costs while maintaining the core functionality.
Solution Approach 2:
The patent introduces a mode converter as an intermediary component that transforms the rectangular waveguide mode to circular waveguide mode. This intermediary element enables power combination without requiring multiple Magic-Tee structures with backshort tuning, thereby reducing manufacturing complexity and cost.
2Reliability
If Magic-Tee waveguide power dividers are used, then power division and combination can be achieved, but additional 90° bends are required which consume additional volume and cause further insertion loss
Solution Approach 1:
The patent merges the power division/combination function with the mode conversion function into a single integrated structure. By combining these functions, the invention eliminates the need for separate 90° bends and multiple Magic-Tee structures, thereby reducing the overall device volume while maintaining power division and combination capabilities.
Solution Approach 2:
The patent transitions from the traditional rectangular waveguide geometry to a circular waveguide geometry with mode conversion. This dimensional and geometric transformation allows for a more compact configuration that eliminates the need for additional 90° bends, reducing the volume consumed by the device.
3Adaptability or versatility
If multiple Magic-Tee structures are used for further dividing and combining signals, then signal division and combination can be achieved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent creates a universal power combiner/divider structure that can handle multiple signal division and combination operations through a single integrated design. The mode converter combined with the circular waveguide structure provides multi-functional capability, eliminating the need for multiple separate Magic-Tee structures and thereby reducing device complexity while maintaining versatility.
4Reliability
If Magic-Tee waveguide power dividers are used, then power division and combination can be achieved, but insertion loss increases due to backshort tuning and additional bends
Solution Approach 1:
The patent removes the backshort tuning elements that cause insertion loss in traditional Magic-Tee structures. By extracting this problematic component, the invention reduces energy loss while maintaining the power division and combination capability.
Solution Approach 2:
The patent employs circular waveguide geometry with curved transitions instead of the sharp 90° bends found in rectangular Magic-Tee structures. This curved, spherical-like geometry reduces electromagnetic discontinuities and reflections, thereby reducing insertion loss while maintaining the core functionality.
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 provides a compact, low-loss, and reliable method for combining or dividing high power RF signals, reducing manufacturing costs and enabling efficient transmission of high power signals in high frequency systems, such as those used in deep space communication systems.
Implementation Method 1
The transition body has an inner transition cavity and an outer body operative to convert radio frequency (RF) signals between the rectangular mode and the circular mode
Data Source
AI summary
A rectangular-to-circular mode combiner/divider is provided. In one aspect of the invention, a power combiner is provided that comprises a plurality of rectangular waveguide ports arranged in an integral arrangement. Each rectangular waveguide port is operative to operate in a rectangular mode. The power combiner is also includes a circular waveguide port operative to operate in a circular mode, and a transition body that couples the plurality of rectangular waveguide ports to the circular waveguide port. The transition body has an inner transition cavity and an outer body operative to convert radio frequency (RF) signals between the rectangular mode and the circular mode, and provide a combined output signal at the circular waveguide port from RF signals received at the plurality rectangular waveguide ports.