Radial Waveguide Power Combiner With Reduced Radius Matching
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Solution Overview
Problem
Existing microwave power distributors/combiners are not adequately downsized due to the conventional design requiring a radius of λ/2.619, which can be further optimized to reduce size.
Innovation Solution
A power distributor/combiner with a radial waveguide having a radius smaller than λ/2.619 and adjusted separation distances between terminals, allowing for efficient microwave power distribution and combination without transmission mismatching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radial waveguide radius is determined as R≥λ/2.619 based on TM010 mode cutoff frequency, then electromagnetic wave transmission is ensured without mismatching, but the power distributor/combiner size cannot be further reduced
Solution Approach 1:
The patent changes the operational mode from TM010 to TM020, which fundamentally alters the cutoff frequency relationship. By operating in TM020 mode where the cutoff frequency is twice the operating frequency (instead of the conventional TM010 mode), the patent enables use of a smaller radial waveguide radius (R<λ/2.619) while maintaining transmission reliability through mode-specific field distribution patterns that satisfy boundary conditions at reduced dimensions.
2Volume of stationary object
If the radial waveguide radius is reduced below λ/2.619, then the power distributor/combiner can be downsized, but transmission mismatching occurs due to boundary condition violations
Solution Approach 1:
The patent transitions from conventional TM010 mode operation to TM020 mode operation, changing the electromagnetic field distribution characteristics. This mode change allows the system to operate with a smaller radial waveguide radius while maintaining proper boundary condition satisfaction, as the TM020 mode's field patterns are compatible with reduced dimensions without causing transmission mismatching.
Solution Approach 2:
The patent introduces adjustable separation distances between the center terminal and peripheral terminals as a dynamic parameter. By optimizing these distances specifically for TM020 mode operation, the system compensates for the reduced waveguide radius and maintains efficient power distribution, allowing the structure to adapt to the smaller尺寸 while preserving transmission reliability.
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 proposed design achieves a more compact power distributor/combiner that maintains effective performance by utilizing a smaller radius and adjusted separation distances, enhancing system downsizing.
Implementation Method 1
a power distributor/combiner that outputs an input microwave power after distributed or combined; including: a main body that defines a radial waveguide as a substantially cylindrical cavity
Implementation Method 2
the resonant frequency of the cavity resonator coincides with the cutoff frequency of the radial waveguide having the same radius
Data Source
AI summary
Provided is a power distributor/combiner 1 that outputs an input microwave power after distributed or combined; the power distributor/combiner 1 including: a main body 10 that defines a radial waveguide 101 as a substantially cylindrical cavity; a center terminal 11 as an electromagnetic field coupling terminal, arranged in the radial waveguide 101 of the main body 10 while aligned with the center axis C of the radial waveguide 101; and a plurality of peripheral terminals 12 as electromagnetic field coupling terminals, arranged in the radial waveguide 101 radially away from the center terminal 11, and the radial waveguide 101 having a radius R smaller than a quotient of a free-space wavelength at a frequency of the microwave power, divided by 2.619.