Radome is the typical microwave (MW) and infrared (IR) source, but the stealth principles of these two bands are the contradictory, making it difficult to achieve MW-IR compatible camouflage with a single material. Metamaterials, due to their unique structure, can manipulate electromagnetic waves to achieve specific functions. In this paper, a compatible stealth flexible metamaterial is proposed, which can realize passband filtering in MW band and selective radiation in IR band. For achieving optimal IR selection radiation and maximum MW selective transmission, the inverse design is used for optimization. Accordingly, the flexible metamaterial integrates IR-MW compatible stealth, MW communication and radiation cooling. It shows low emissivity in the two main bands of IR detection (ε3~5 μm=0.098, ε8~14 μm=0.100), and relatively high emissivity outside these two bands (ε5~8 μm=0.513), while achieving a high transmittance of 98.8% in the WM band. This provides a reasonable guidance for the design of MW-IR stealth materials with specific frequency selection.
Based on the luminescence of the X-ray in the scintillator, this article builds a new hexagonal microcolumn model of CsI(Tl) thin film coupled with the charge-coupled device (CCD). The study proposes a fluorescence transport structure for X-ray luminescence and investigates the fluorescence transformation efficiency of the CsI(Tl) crystal to X-ray. Simulation results reveal that the different thickness and crystal column diameter has a significant impact on the fluorescence transmittance efficiency. The comprehensive discussion indicates that the maximum efficiency can be acquired under an appropriate grain diameter and film thickness.
KEYWORDS: Sensors, Magnetism, Magnetic sensors, Thin films, Model-based design, Computer programming, Microelectronics, Solid state electronics, Electronics, Picture Archiving and Communication System
A novel design model based on slant multi-phase filter(SMPF)theory is presented. The output voltage waveform of magnetoresistive(MR) element is simulated, it is found that the slant angle can affect the output performance of the MR sensor obviously. When the ratio of MR element length to magnetic pole length is five, the decrease of the output is small in the region where the slant angle is from 0 to 5°, less than 20%.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.