Two Probe Waveguide Tuner Horizontal Movement
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Solution Overview
Problem
Existing waveguide impedance tuners require high precision and complex vertical movement mechanisms, leading to slow tuning procedures due to the need for precise probe insertion and extraction, which is cumbersome and sensitive to mechanical positioning errors.
Innovation Solution
A horizontal-only high-speed movement technique using two diametrically mounted tuning probes on mobile sliding carriages, eliminating the need for vertical probe control and allowing for fixed-depth insertion into the waveguide, with stepper motors and ACME rods or linear actuators for precise horizontal control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If vertical probe movement mechanisms are used to achieve impedance tuning, then the tuning range and coverage are improved, but the device complexity and mechanical precision requirements increase significantly
Solution Approach 1:
The patent transitions from vertical probe movement to horizontal probe movement by 90 degrees. The probes now move horizontally along the waveguide axis rather than vertically into the waveguide, fundamentally changing the dimension of movement while maintaining the ability to achieve impedance tuning through a different geometric configuration
Solution Approach 2:
Instead of moving the probe vertically into and out of the waveguide, the patent inverts the approach by having the probe move horizontally along the waveguide. The probe remains at a fixed vertical depth but varies its horizontal position to achieve tuning, effectively inverting the movement paradigm
2Measurement precision
If high precision vertical probe insertion is used to generate reflection factors, then the tuning accuracy is improved, but the tuning speed decreases due to lengthy movement required
Solution Approach 1:
The patent changes the movement dimension from vertical (requiring full insertion and extraction) to horizontal (allowing rapid positioning along the waveguide axis). This dimensional change enables the probe to achieve tuning accuracy through horizontal displacement without the need for lengthy vertical movement cycles
Solution Approach 2:
The patent extracts the probe from the vertical movement cycle, eliminating the need for repeated full insertion and extraction. The probe is maintained at a fixed optimal vertical depth and only moves horizontally, removing the time-consuming vertical movement component while preserving tuning functionality
3Stability of the object's composition
If constant vertical moving resolution is used for probe control, then the positioning consistency is improved, but the positioning accuracy deteriorates in high reflection areas where enhanced resolution is required
Solution Approach 1:
By moving the probe horizontally instead of vertically, the patent changes the operational dimension where positioning occurs. The horizontal movement allows for different resolution characteristics and enables variable resolution control without the constraints of vertical movement mechanics, improving positioning accuracy where needed while maintaining overall consistency
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 tuning error sensitivity and enhances calibration speed, enabling faster and more accurate impedance tuning without the limitations of vertical probe control, resulting in a compact, high-speed adaptive tuner.
Implementation Method 1
When conductive tuning probes (typically rods) 20, FIG. 2, penetrate into the waveguide 26, they capture and deform the electric field, which is concentrated in the area 29 between the bottom tip of the probe 20 and the ground plane 23 of the waveguide. This field deformation creates a capacitive effect send injected signal power back
Implementation Method 2
The impedance tuner itself, of which a conceptual cross section is shown in FIG. 4, uses a low loss waveguide transmission line 40
Data Source
AI summary
A new two-probe waveguide slide screw load-pull tuner of which the probes share the same waveguide section; they are inserted diametrically at fixed depth into facing each other slots on opposite broad walls of the waveguide. The tuner does not have cumbersome adjustable vertical axes controlling the penetration of the probes and its low profile is optimized for on-wafer operations. The carriages holding the probes are moved along the waveguide using electric stepper motors or linear actuators.