Chiral microwave absorbing metamaterial and preparation and application thereof
A technology of microwave absorption and metamaterials, applied in the direction of electrical components, antennas, etc., can solve the problems of thick absorber, difficulty in processing and manufacturing, and influence on absorption effect, etc., and achieve the effect of easy application and promotion, easy control, and low preparation cost
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0035] The invention relates to the preparation and application of a chiral microwave absorbing metamaterial. Using chiral helical structures (springs and tower springs) as periodic structural units, microwave absorbing metamaterials with different periods are constructed by vertical coaxial nesting on a 2mm thick, 180mm×180mm FR4 substrate and distributed in a two-dimensional array. The outer diameter of the spiral structure wire is 0.5-3cm, the wire diameter is 0.45-1mm, the number of turns is 1.5-6 turns, and the pitch is 2.5-5mm; the period of the metamaterial is a two-dimensional array of 5×5, 8×8, and 14×14. When the polarization mode of the incident electromagnetic wave matches the polarization mode of the helical structure, a strong surface current will be induced, and then play the role of resonant microwave absorption. The design idea of the present invention is novel, and the chiral microwave absorbing metamaterial has a remarkable strong absorption-broadband-ligh...
Embodiment 1
[0039] First design a 5×5 concentric circle pattern with DXP software, and the diameters of the concentric circles are 1cm, 2cm, and 3cm respectively. Connect the fully automatic drilling, milling and engraving integrated machine, fix the 2.0mm×180mm×180mm FR4 substrate in the engraving area, and carry out hollow engraving; , are sequentially embedded in the hollow gaps of concentric circles, distributed in a 5×5 array, and a single helical chiral metamaterial is obtained.
[0040] The reflectivity of the chiral material was tested by arch method. Its sample physical picture and reflectance curve are as follows figure 1 – image 3 shown. It can be seen that when the electromagnetic wave incident angle is 120°, the frequency bandwidth of the chiral microwave absorbing metamaterial is less than or equal to –10dB is about 10.4GHz, and the strongest absorption peak is –40.1dB.
Embodiment 2
[0042]The steps are the same as in Example 1, except that a large iron spring with an outer diameter of 3cm, a wire diameter of 0.45mm, a pitch of 5mm, and a number of turns of 3 turns is used here, and a large iron spring with an outer diameter of 2cm, a wire diameter of 0.45mm, a pitch of 5mm, and a number of turns Three coils of small iron springs coaxially nest the two helical structures in a two-dimensional array of 5×5. Its sample physical map and reflectance curve are as follows Figure 4 – Image 6 shown. It can be seen that when the electromagnetic wave incident angle is 90°, the frequency bandwidth of the chiral microwave absorbing metamaterial is less than or equal to –10dB is about 17.1GHz, and the strongest absorption peak is –31.3dB; when the electromagnetic wave incident angle is 120°, the chiral microwave absorbing metamaterial The frequency bandwidth of the microwave absorbing metamaterial is less than or equal to –10dB is about 27.1GHz, and the strongest ab...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com