Dielectric Substrate Antenna Reducing Volume and Bandwidth
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Solution Overview
Problem
Existing normal radiation antennas have a large volume and high material costs due to the superposition of multiple metal layers, and their bandwidth is limited by the resonance properties of radiation gaps, leading to decreased efficiency when signal frequencies deviate from the center frequency.
Innovation Solution
The design incorporates a feeding part and a radiating part using dielectric substrates with perpendicular plated-through holes and a coupling groove, allowing for a compact structure and direct radiation of energy outward, thereby improving bandwidth and reducing volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple metal layers are superposed to form the antenna, then the antenna structure is complete and functional, but the volume and material cost increase significantly
Solution Approach 1:
The patent extracts and eliminates unnecessary metal layers from the traditional twelve-layer structure. By removing redundant metal plates and simplifying the layer configuration, the antenna maintains its radiation functionality while significantly reducing volume and material cost. The essential feeding and radiating functions are preserved through selective retention of only the necessary conductive elements.
Solution Approach 2:
The patent employs composite material construction by integrating dielectric substrates with metallic conductive layers. This composite approach allows the antenna to achieve both mechanical structural integrity and electromagnetic radiation functionality without requiring multiple separate metal layers, thereby reducing overall volume while maintaining performance.
2Power
If radiation gaps are used as resonate structures for signal transmission, then the antenna can radiate signals effectively at center frequency, but the bandwidth becomes narrow when signal frequency deviates from center frequency
Solution Approach 1:
The patent implements dynamic frequency adaptation by designing the radiating element as a microstrip line that can operate across a broad frequency range. Unlike fixed resonance structures, the microstrip configuration allows the antenna to maintain effective radiation across varying frequencies, dynamically adapting to different operating conditions and expanding the usable bandwidth beyond the narrow center frequency response.
Solution Approach 2:
The patent changes the fundamental parameter of the radiating structure from a fixed resonance gap to a distributed microstrip transmission line. This parameter change transforms the antenna's frequency response characteristics, enabling broadband operation by distributing the radiation mechanism across the entire microstrip structure rather than concentrating it at a single resonant frequency.
3Reliability
If twelve layers of metal plates are superposed to form the normal radiation antenna, then the antenna achieves normal radiation function, but the material cost and processing process cost become high
Solution Approach 1:
The patent extracts and removes unnecessary metal layers from the traditional twelve-layer construction. By retaining only the essential conductive elements needed for feeding and radiation functions, the design significantly reduces material consumption and manufacturing complexity while preserving the antenna's radiation capability.
Solution Approach 2:
The patent applies local quality by concentrating conductive materials only where electromagnetically necessary - specifically at the feeding region and radiating microstrip elements - rather than using extensive metal plating throughout all twelve layers. This localized material distribution reduces both material cost and processing complexity while maintaining functional 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 configuration reduces the antenna's volume, enhances bandwidth, and maintains high performance across a wide frequency range by eliminating the need for multiple metal layers and resonance structures, resulting in a more efficient and cost-effective millimeter wave antenna.
Implementation Method 1
The substrate integrated waveguide is a new type of a planar transmission line... Therefore, the substrate integrated waveguide is quite suitable for design of a millimeter wave antenna
Implementation Method 2
an uppermost layer is one metal plate that is provided with four through holes, where the four through holes are radiation gaps and used for transmit a radio signal
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention relates to an antenna, which includes a feeding part and a radiating part. By using the feeding part and the radiating part that are perpendicular to each other and use dielectric substrates, not only a volume of a normal radiation antenna is reduced, but also a substrate integrated waveguide directly radiates energy outwards, thereby improving operating bandwidth of the antenna.