Ridged Waveguide Array Layout for Wider Single-Mode Bandwidth
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Solution Overview
Problem
Existing radio frequency components, particularly those forming antenna arrays, face challenges in minimizing interference, secondary emission lobes, and performance limitations such as limited bandwidth and compactness, with existing designs like WO2015/134772 and US2011/133863 having specific disadvantages.
Innovation Solution
The use of grooves in waveguide devices, specifically with three grooves in downstream apertures and differing arrangements upstream and downstream, enhances single-mode bandwidth and allows for better control of signal polarization and phase shift, reducing mutual coupling between antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If three grooves are added in downstream apertures of waveguide devices, then single-mode bandwidth is significantly increased, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the waveguide structure through the addition of three grooves in downstream apertures. This structural parameter change fundamentally alters the electromagnetic mode propagation characteristics, enabling significant expansion of single-mode bandwidth while maintaining controlled device complexity through systematic design
2Measurement precision
If different arrangements of grooves are used upstream and downstream, then discrimination between fundamental and higher-order modes is facilitated, but manufacturing precision requirements increase
Solution Approach 1:
The patent implements asymmetry by configuring different groove arrangements in upstream versus downstream apertures of waveguide devices. This asymmetric design creates distinct electromagnetic field distributions that facilitate clear discrimination between fundamental and higher-order modes, while the systematic nature of the asymmetric configuration helps manage manufacturing precision requirements
3Object-generated harmful factors
If adjacent antennas are placed closely with distance less than wavelength, then side lobes are reduced, but miniaturization of component parts is required which is difficult to achieve
Solution Approach 1:
The patent applies local quality by implementing groove structures at specific locations within waveguide devices rather than uniform modifications throughout. This localized approach enables effective reduction of side lobe amplitudes through controlled electromagnetic field manipulation at critical points, avoiding the need for comprehensive miniaturization of all component parts
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 significantly increases single-mode bandwidth, facilitates discrimination between fundamental and higher-order modes, and improves performance in terms of gain, directivity, and compactness, while minimizing interference and secondary lobes.
Implementation Method 1
Waveguide devices with one or more ridges on their internal surface are also frequently used; for example, 'double ridged antennas,' 'quadruple ridged antennas,' etc., refer to antennas with two or four ridges, respectively. Such ridges allow, for example, impedance matching of the devices to that of other devices in the component, the fabrication of more compact and therefore lighter devices with equivalent performance, control of the transmission modes of electromagnetic signals within the ridged device, and, for example, the prevention of the transmission of unwanted modes or modes that generate significant interference with adjacent devices.
Data Source
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AI summary
A radiofrequency component (1) having a plurality of waveguide devices (2), for example antennas or polarizers, arranged in an array and designed to transmit and/or receive electromagnetic signals, the radiofrequency component (1) having a plurality of ridges (23), and each waveguide device having: at least one inner wall (3); an upstream aperture (24) located upstream with respect to the direction of propagation of the emitted signals; a downstream aperture (25) located downstream with respect to said direction of propagation of the emitted signals, which aperture is linked to the upstream aperture such that the emitted signals are transmitted from the upstream aperture to the downstream aperture; wherein the ridge arrangement in the downstream apertures (25) of each waveguide device (2) comprises no more and no fewer than three ridges (23).