Triple Band Ultra-Thin Metamaterial Absorber With Wide Incident Angle Stabil
Business Challenges:
The traditional electromagnetic absorbers, like Salisbury screen, Jaumann absorbers, Dallenbach layers are complex design, narrow band and thicker. Therefore, the main challenges were to design and optimize electrically thin electromagnetic absorbers with improved bandwidth performance for multiband operations over wide incident angles with flexible design configuration to achieve control of individual frequencies using ANSYS.
Technology Used:
ANSYS HFSS
MITS Prototyping Machine
Engineering Solution:
ANSYS HFSS was used to design unit cell of the proposed triple band metamaterial absorber structure. Design is simulated by applying Floquet’s periodic boundary conditions. The field and surface current distributions have been studied to understand the absorption mechanism.
A prototype array of absorber design has been fabricated using MITS Prototyping Machineand its performance is experimentally verified under normal and oblique incidences for TE and TM polarizations
Methodology Adopted:
- The unit cell design of the proposed triple band metamaterial absorber structure consists of three ELC (Electric field driven LC) resonator structures in such a manner that two small size ELC resonator structures of different widths are perpendicularly embedded in a large sized ELC resonator.
- The structure exhibits three absorption peaks in C, X and Ku-band.
- The performance of the absorber design has been investigated through the illustration of the wide incident angle stability for TE polarization.
- The contributions of the individual ELC resonator elements in the proposed absorber design have been studied to investigate the origin of three absorption peaks.
Figure a
Figure b
Figure c
Fig: (a) Field Distribution Electric field at 4.97Ghz. (b & c) Surface Current distribution top & bottom at 4.97Ghz using ANSYS HFSS.
Figure d
Benefits:
- The proposed absorber is ultrathin with its thickness of ~λ/14 corresponding to its highest frequency of absorption.
- The simulated results show three absorption peaks at 4.97, 11.27 and 13.43 GHz with 66.88, 98.06 and 99.97% absorption rates corresponding to each ELC resonator.
- Design provides the flexibility of independent adjustment of absorption frequencies for different operating bands by optimizing the dimensions of the individual ELC resonator
- Here, the geometric dimensions are optimized to serve C, X and Ku-band applications, such as RCS reduction, photodetector, bolometer and electromagnetic interference.
Application:
- Compressors, Fans, Extruders, Pumps.
- Textile machines, Looms, Spinning frames.
- Cooling Towers.
- Paper machines, Paper coil winders.
- Conveyors.
Entuple’s Team :
Entuple has a team of Field application engineers and senior industry experts Training the learners on Antenna and RF design is the sole purpose of our trainers. Using ANSYS HFSS simulation engineering students and learners can learn about Antenna design