Terminated Waveguide-to-Coaxial Converter for Wider Bandwidth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Waveguide-to-coaxial converters exhibit inferior spread-spectrum performance due to discontinuity-induced high-order modes that cannot be transmitted, limiting their operation bandwidth.
Innovation Solution
A terminated spread-spectrum waveguide-to-coaxial converter design featuring a step structure and narrow b-edge configuration, with a boss structure and sleeve arrangement for impedance matching, and slopes on the cavity surfaces to expand high-frequency bandwidth and simplify machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a probe is inserted into the waveguide cavity to enable signal transition, then the waveguide-to-coaxial conversion function is achieved, but discontinuity is generated causing infinite high-order modes that cannot be transmitted, resulting in inferior spread-spectrum performance
Solution Approach 1:
The patent extracts the harmful high-order modes by introducing a terminated waveguide structure that guides these modes away from the probe area and dissipates them through termination, rather than allowing them to accumulate and create reactive effects
Solution Approach 2:
The patent introduces a terminated waveguide section as an intermediary between the probe and the main waveguide cavity, which serves as a mediator to channel and dissipate the harmful high-order modes, preventing them from affecting the probe's performance
2Adaptability or versatility
If impedance matching is improved through step structure, then operation bandwidth is expanded, but device complexity increases
Solution Approach 1:
The patent segments the waveguide structure into multiple sections with different dimensions (step structure), where each segment contributes to impedance transformation, enabling broad bandwidth operation through gradual impedance matching rather than a single complex structure
3Adaptability or versatility
If a narrow b-edge structure is used at the joint between waveguide and coaxial structure, then high frequency bandwidth is expanded, but machining difficulty increases
Solution Approach 1:
The patent applies the narrow b-edge structure only at the specific location where the waveguide joins the coaxial structure, rather than throughout the entire waveguide, thereby achieving high-frequency bandwidth expansion while minimizing the impact on overall machining complexity
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 achieves improved impedance matching, expanded operation bandwidth, and reduced machining complexity, while maintaining stable standing wave and insertion loss curves, effectively addressing the limitations of existing converters.
Implementation Method 1
impedance matching is implemented by a step structure
Implementation Method 2
a narrow b-edge structure is used at a joint between a waveguide and a coaxial structure to further expand a high frequency bandwidth
Data Source
AI summary
Disclosed is a terminated spread-spectrum waveguide-to-coaxial converter, which relates to the technical field of waveguide converters. The converter includes an upper cavity, a lower cavity, a cover plate and a connector, where a waveguide cavity is formed between the upper cavity and the lower cavity, openings are formed on a left side and a right side of the waveguide cavity, the cover plate is fixed to an outer side of a left end opening of the waveguide cavity, the connector is fixed to an outer side of the cover plate, and a coaxial inner conductor on the connector passes through a through hole formed on the cover plate to enter the waveguide cavity.