Waveguide Circulator Integrated Transition for Low Insertion Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing waveguide circulators require a transition from waveguide to coaxial or microstrip interfaces, which increases size, mass, and insertion loss due to an empty-waveguide transition, limiting their reliability and efficiency in space and high-power applications.
Innovation Solution
The design incorporates N waveguide arms with a ferrite element and quarter-wave dielectric transformers, along with a coaxial-coupling component positioned within a quarter wavelength of the electro-magnetic field, eliminating the empty-waveguide transition and optimizing impedance matching through integrated-transition elements or coaxial-probe configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a waveguide circulator directly interfaces to components in other transmission media (coaxial or microstrip line), then impedance matching is required, but the empty-waveguide transition increases size, mass, and insertion loss
Solution Approach 1:
The patent merges the waveguide interface and coaxial interface into a single integrated transition structure. The coaxial-coupling component is positioned within a quarter wavelength of the quarter-wave dielectric transformer, eliminating the need for a separate empty-waveguide transition section. This integration reduces the transition path length and eliminates the harmful empty-waveguide transition, thereby reducing insertion loss while maintaining reliability.
Solution Approach 2:
The patent introduces a coaxial-coupling component as an intermediary element between the waveguide and coaxial/microstrip components. This intermediary component enables direct coupling without requiring a traditional empty-waveguide transition, reducing the transition path length and associated energy losses while maintaining proper impedance matching.
2Adaptability or versatility
If a waveguide circulator directly interfaces to components in other transmission media, then impedance matching is required, but the transition increases size and mass
Solution Approach 1:
The patent combines multiple interface functions into a single integrated transition structure that directly couples waveguide arms to coaxial or microstrip components. By merging the waveguide interface, dielectric transformer, and coaxial interface into one compact structure, the overall size and mass are reduced while maintaining adaptability to different transmission media.
Solution Approach 2:
The patent transitions from a three-dimensional empty-waveguide transition path to a more compact integrated structure by repositioning the coaxial-coupling component within a quarter wavelength of the quarter-wave dielectric transformer. This dimensional optimization eliminates the need for a long transition path, reducing size and mass while maintaining interface compatibility.
3Adaptability or versatility
If a waveguide circulator uses an empty-waveguide transition to interface with other transmission media, then connectivity is achieved, but the transition path length increases
Solution Approach 1:
The coaxial-coupling component serves as an intermediary that enables direct coupling between waveguide and coaxial/microstrip components. This intermediary approach eliminates the need for a long empty-waveguide transition path, reducing the transition path length to within a quarter wavelength while maintaining connectivity between different transmission media.
Solution Approach 2:
The patent repositions the coaxial-coupling component within a quarter wavelength of the quarter-wave dielectric transformer, fundamentally changing the transition geometry from a long empty-waveguide path to a compact integrated structure. This dimensional change reduces the transition path length significantly while maintaining adaptability to different transmission media.
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 configuration reduces the transition path length, size, and mass, while improving frequency bandwidth and reducing insertion loss, enhancing the reliability and performance of waveguide circulators in space and high-power applications.
Implementation Method 1
quarter-wave dielectric transformers attached to respective ends of at most (N−1) other segments
Implementation Method 2
a ferrite element having N segments protruding into the N respective waveguide arms
Implementation Method 3
a coaxial-coupling component positioned within a quarter wavelength of the electro-magnetic field from the first quarter-wave dielectric transformer
Data Source
AI summary
A waveguide circulator for an electro-magnetic field having a wavelength is provided. The waveguide circulator includes: N waveguide arms, where N is a positive integer; a ferrite element having N segments protruding into the N respective waveguide arms; at most (N−1) quarter-wave dielectric transformers attached to respective ends of at most (N−1) other segments; a first quarter-wave dielectric transformer attached to an end of the first segment; and a coaxial-coupling component. The N waveguide arms include a first-waveguide arm and (N−1) other-waveguide arms. The N segments include a first segment protruding into the first-waveguide arm and (N−1) other segments protruding into respective (N−1) other-waveguide arms. The coaxial-coupling component is positioned within a quarter wavelength of the electro-magnetic field from the first quarter-wave dielectric transformer positioned in the first-waveguide arm.