Cavity Electromagnetic Wave Radiator for High Q-Factor Millimeter-Wave Radiation
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Solution Overview
Problem
Current millimeter-wave and terahertz-wave devices have low quality factors, limiting their efficiency in transmitting and receiving electromagnetic waves, and existing solutions such as multi-port driven antennas do not provide high enough Q-factors for effective radiation.
Innovation Solution
The electromagnetic wave radiator design features a first metal layer with protruding side walls and a second metal layer with radially extending ports and slots, suspended over the first metal layer, forming a cavity that functions as a resonator, power combiner, and radiator, with oscillators providing signals of identical amplitude and different phases to enhance resonance and radiation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional millimeter-wave/THz-wave microstrip patch antennas are used, then the device structure is simple, but the quality factor is low and radiation efficiency is insufficient
Solution Approach 1:
The radiator is divided into multiple functional segments: a first metal layer forming a cavity base, a second metal layer suspended above with radially extending ports and slots, and multiple metal side walls vertically protruding along the cavity edge. This segmentation allows each component to contribute specifically to achieving high Q-factor while maintaining manufacturability through modular construction
Solution Approach 2:
The invention transitions from a planar microstrip patch structure to a three-dimensional cavity resonator structure with vertical metal side walls and suspended second metal layer. This dimensional change creates a resonant cavity that significantly improves the quality factor by confining electromagnetic energy in the vertical dimension while maintaining radial symmetry for efficient radiation
2Productivity
If multi-port driven antennas are used to improve radiation, then the radiation capability is enhanced, but the quality factor remains insufficient
Solution Approach 1:
The invention merges multiple functions into a unified cavity resonator structure: the radially extending ports serve as both feed points for multi-port driving and as radiation apertures, while the slots in the second metal layer simultaneously confine electromagnetic energy to enhance resonance and provide additional radiation paths. This integration achieves high Q-factor without compromising radiation capability
Solution Approach 2:
The second metal layer components serve multiple functions: the radially extending ports function as both signal input terminals and radiation elements, while the slots simultaneously act as electromagnetic energy confiners for resonance enhancement and additional radiation apertures. This multi-functionality allows the structure to achieve high Q-factor while maintaining excellent radiation performance
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 design achieves high quality factors, reducing conductive loss, improving efficiency, and enabling the radiation of circularly-polarized millimeter-wave/terahertz waves with low phase noise and high power delivery, effectively addressing the limitations of existing devices.
Implementation Method 1
a cavity for resonance of an electromagnetic wave, and the first metal layer, the plurality of metal side walls, and the second metal layer may be configured so that the cavity functions as a resonator
Implementation Method 2
at least one oscillator configured to provide a signal to each of the plurality of ports. The at least one oscillator may be configured so that signals provided to the plurality of ports have an identical amplitude and different phases from each other
Data Source
AI summary
An electromagnetic wave radiator may include: a first metal layer; a plurality of metal side walls vertically protruding along an edge of the first metal layer; and a second metal layer suspended over the first metal layer. The second metal layer includes a plurality of ports radially extending from edges of the second metal layer and a plurality of slots penetrating the second metal layer in a radial direction.