Tunable Waveguide Transition With Tapered Slot Frequency Tuning
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Solution Overview
Problem
Conventional transitions for millimeter or submillimeter wave applications, such as dipoles and Vivaldi antennas, face limitations in being either disruptive to design or lacking tuneable frequency response, requiring additional components like quarter wavelength cavities or non-tuneable passbands.
Innovation Solution
A tuneable transition using a tapered slot antenna with microstrip feed line and adjustable tuning stubs on a planar substrate, allowing for in-line configuration and frequency tuning by manipulating the position and structure of the magnetic field, defined by multiple equations for the slot profile to minimize size and optimize frequency and bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dipole probe is used for signal energy transfer, then broadband performance is achieved, but the design becomes disruptive and requires additional quarter wavelength cavity components
Solution Approach 1:
The patent combines the dipole probe functionality with the waveguide structure by integrating the dipole arms directly into the waveguide walls, eliminating the need for separate quarter wavelength cavities and reducing design complexity while maintaining broadband performance
Solution Approach 2:
The waveguide structure serves multiple functions simultaneously: it provides the signal energy transfer path, houses the dipole probe structure, and eliminates the need for separate supporting cavities, thereby reducing overall device complexity
2Device complexity
If a tapered slot antenna is used for in-line transition, then design disruption is reduced, but the pass band becomes non-tuneable
Solution Approach 1:
The patent introduces movable tuning stubs that can be adjusted along the waveguide walls to dynamically change the resonant frequency of the transition structure, enabling frequency tuneability while maintaining the in-line configuration benefits
Solution Approach 2:
The patent changes the electrical parameters of the transition by adjusting the position and length of tuning stubs, which modifies the resonant frequency and impedance characteristics to achieve desired frequency response without altering the basic in-line structure
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 transition provides flexible, low-loss, and tuneable frequency response, facilitating easier assembly and manufacturing of millimeter wave systems with improved out-of-band attenuation and filtering capabilities, suitable for various applications including radar and radio communications.
Implementation Method 1
the transfer of signal energy between conductive media and airborne media requires the use of a transition or probe
Implementation Method 2
frequency tuning by manipulating the position and structure of the magnetic field
Data Source
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AI summary
The present invention provides a transition for millimetre wave circuits. The transition comprises a tapered slot antenna and a microstrip feed line coupled to the antenna. The transition is adapted to provide a tuneable frequency response.