Three-Ridge Waveguide Array for Wider Single-Mode Bandwidth
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Solution Overview
Problem
Existing radio-frequency components with multiple waveguide devices face challenges such as limited single mode bandwidth, interference between adjacent antennas, and the difficulty in reducing side lobes, which restricts their performance and design flexibility.
Innovation Solution
A radio-frequency component comprising several waveguide devices with a specific arrangement of ridges, where each waveguide device has at least one inner wall with three ridges at the downstream opening, allowing for enhanced mode discrimination and increased single-mode bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If waveguide devices are arranged closely adjacent with distance d less than wavelength to reduce side lobes, then side lobe amplitude is reduced, but device miniaturization becomes difficult to achieve
Solution Approach 1:
The patent applies parameter changes by modifying the physical structure of the waveguide devices through the addition of ridges. The ridges alter the electromagnetic field distribution and wave propagation characteristics within the waveguide, enabling better control over side lobe amplitudes without requiring extreme miniaturization of the overall device structure. This structural parameter modification allows the device to achieve desired performance while maintaining manufacturable dimensions.
2Power
If multiple waveguide devices are grouped together to improve gain and directivity, then antenna performance is improved, but interference between adjacent antennas increases
Solution Approach 1:
The patent applies local quality by introducing ridges at specific locations within the waveguide devices. These ridges create localized modifications to the electromagnetic field distribution, affecting wave propagation and mode characteristics in specific regions of the waveguide. This localized structural enhancement allows each device in the array to maintain its performance while reducing unwanted interactions with adjacent devices, thereby minimizing interference in the overall antenna system.
3Reliability
If ridges are added to waveguide devices to control transmission modes and avoid interference, then mode control is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the waveguide structure into distinct sections with and without ridges. The ridges are positioned at specific locations (e.g., at openings or at specific distances from openings) to perform specific functions such as mode control or impedance matching, while other sections of the waveguide maintain their simple cylindrical or rectangular geometry. This segmented approach allows the designer to add complexity only where necessary to achieve mode control and interference avoidance, rather than making the entire device complex.
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 use of three ridges in the downstream openings significantly increases the single-mode bandwidth of each waveguide device, providing more design freedom and improved performance in terms of cross-polarization, gain, return loss, and isolation.
Implementation Method 1
Waveguide devices with one or more ridges on their internal surface are also often used; for example, double ridged antennas, quadruple ridged antennas, etc. are called 'double ridged antennas'
Data Source
AI summary
Radio-frequency component including several waveguide devices, for example antennas or polarizers, arranged in an array for transmitting and/or receiving electromagnetic signals. The radio-frequency component includes several ridges and each waveguide device includes: at least one inner wall; an upstream opening in the direction of propagation of the signals during emission; and a downstream opening in the direction of propagation of the emitting signals, linked to the upstream opening so that the emitting signals are transmitted from the upstream opening to the downstream opening. The arrangement of the ridges in the openings upstream of the radiofrequency component may be different from the arrangement of the ridges in the openings downstream of the radio-frequency component. The arrangement of ridges in the downstream openings of each waveguide device includes no more and no less than three ridges.