Belarusian State University of Informatics and Radioelectronics Information

Belarusian State University of Informatics and Radioelectronics Information Security Department Lab of Advanced Materials and Elements for Electronics and Superconductive Electronics

Technologies for wideband electromagnetic shields and absorbers o § § o o Knitted technology for electromagnetic shields and absorbers, including: usage of microwire; knitted fabrics metallization by vacuum deposition; nanosize metal particles deposition on a developed surface of porous materials (organic and inorganic) by electroless deposition; liquid-containing composite materials forming; Composite material using powder conductive and dielectric fillers; Designing the wideband electromagnetic shields and radioabsorbers based on the developed composite materials.

Knitted technology for electromagnetic shields and absorbers o Technology offers formation of 4 m wide knitted linen with both plain surface and geometrical non uniformity that can be formed in single technological step. § High throughout; Flexibility; Dimensional stability; High durability; Air penetration; Obtaining different shape items. § § §

Technology with nanosize metallic particles incorporated into flexible polymer matrix o o o § § The technology is based on reaction of chemical sorption and electroless deposition that enables formation of nanosize metallic clusters within flexible polymer matrix. Crystallites size 5– 100 nm Materials resistivity: Ni 2. 5· 10– 3 Ω·cm; Co 5· 10– 2 Ω·cm.

Liquid incorporation in threads and fibers o While material forming micro- and nanosized liquid particles of complicated shape are obtained

Application o o o o Land object masking; Protection against intensive electromagnetic pulse exposure; Protection against electromagnetic terrorism; Information security; Electromagnetic compatibility; Electromagnetic measurements; Radioecology.

Frequency analysis of signal reflected off the target § § § Scattering cross-section Target range Decrease of radar target detection range 50 m 2; 100 m; up to 5 times.

Optical methods of target detection

Spectral-polarization properties of liquid-containing materials

Spectral-polarization properties of optical and radio ranges absorber adapted for sandy backgrounds

Protective means for object masking against the vegetation background in optical and radio ranges of EMR

Protective means for object masking against the sandy background in optical and radio ranges of EMR

Thermal contrast of the target covered by absorber in the medium IR (3 -5 m) range Thermal picture of non-masked target o o Thermal picture of masked target Target distance, Air temperature, Thermal contrast of masked target Thermal perceptibility decrease, times 10 m; – 10°С; 0. 32; 2. 8

Thermal contrast of the target covered by absorber in the far IR (812 m) range o o o Target distance Ambient air temperature, Surface temperature of heated target, Material surface temperature, Thermal contrast of masked target Thermal perceptibility decrease, times 2 m; 20°С; 100°С; 25°С; 0. 25; 4

Demonstration of thermal masking system operation

Demonstration of thermal masking system operation (VMADS) o o Operating frequency Human skin heating time Skin surface heating temperature Penetration depth 95 GHz 2 s 45°С to 1 mm

Protection against intensive electromagnetic pulse exposure § § Radiation parameters Radiated power 20 k. W, Pulse duration 400 ns, Repetition period 50 Hz, Pulse stuffing frequency 37 GHz. § § Materials characteristics Max thickness (sine cover) 3 mm, Attenuation – not lower than 20 d. B.

Electromagnetic compatibility and measurements o o o Radioelectronic equipment including on-board systems (shielding of interference of elements and devices); Antennas (blends and shields to decrease lateral radiation, decrease of interference); Measurement systems (antenna grounds, mobile anechoic chambers).

Protective materials application for blocking of illegal access to electronic devices Electronic passport data reading procedure Normal mode Procedure blocked by applying EMR absorber

Protection of human organism against technical means’ EMR o o o Protection of radio communication users including mobile phones protection; Protection of personal computers users, consumer radioelectronics users; Protection of service personnel of radio engineering systems.

Protection of PC users o § § § Comfort Flexible air-permeable vest capable to attenuate EMR. Can be used to protect PC users. External grounding application is not required. General parameters Operating frequency range 30– 1000 MHz, EMR attenuation 20– 30 d. B, Operating temperature range – 30…+70°C.

Protection of PC users o § § § Compensator-M Optically transparent product which prevents propagation of electromagnetic radiation from PC to user. General parameters Operating frequency range 100– 1000 MHz, EMR attenuation 8– 30 d. B, Operating temperature range – 30…+70°C.

Developed materials application in human protection means o Simulation of spatial distribution of mobile phone EM field and its interaction with human head tissues with protective EM shield and without it

Application in human protection means § § § EM shielding protection means possess more than 30 d. B effectiveness and about 10… 25 % EM power reflection in the frequency range 1… 150 GHz; Perspectives of developed materials application in protection means for mobile phones users were analyzed mathematically; Mobile phone radiated power is locally decreased by 500 times.

Mobile phone EMR indicator o § § § Intended for estimation of electromagnetic radiation produced by mobile phone, fast check of EMR protection means efficiency. General parameters Operating frequency range 200 -2000 MHz, Operating temperature range – 20…+40°C, Weight 250 g, Dimension 160 95 25 mm, USB interface 2. 0.

Mobile phone EMR indicator displays radiated power level in watts on embedded LCD monitor. It can be connected to a personal computer to display a radiation timing diagram and process the obtained data using special software.

Developed materials application in human protection means o Protected house development to provide information security both in acoustic and electromagnetic leakage paths

Protected house development o o o Advantages High acoustic signal suppression efficiency, avoid active protective means utilization (noise generator); Optical transparency of designing materials; Mobility and fast assemblage ability; Low cost and small weight; Combined optically transparent panels for modular protective houses to prevent information leakage by electromagnetic and acoustic paths.

Sound-insulating coefficient measuring equipment § § § § Equipment structure 1 – metal pipe; 2 – LF generator Г 3 -118; 3 – power amplifier LV-103; 4 – loudspeaker; 5 – measurement microphone; 6 – sound-level meter ВШВ-003; 7 – experimental sample.

Optically transparent soundabsorbing cellular material o o o General parameters Operating frequency range Sound signal attenuation Operating temperature range Thickness Weight 60– 8000 Hz, 7– 31 d. B, – 20…+50°C, 10 mm, 1. 7 kg/m 2

Sound-insulating coefficient measurement results 1 – single-layered material; 2 – multi-layered material.

Protective house design to provide information security both in acoustic and electromagnetic leakage paths o The house has modular structure comprised of panels providing suppression of electromagnetic radiation and acoustic signals. Panels are transparent to observe the presence of a foreign man or object.

Our staff Dr. Leonid Lynkov, Prof. , research supervisor, Head of the Information Security Department Email: leonid@bsuir. by Dr. Alexander Proudnik, Assoc. Prof. , senior researcher, Dr. Timofei Borbotko, Assoc. Prof. , senior researcher, Dr. Natalia Kolbun, Assoc. Prof. , senior researcher

Contact information 220013 Republic of Belarus Minsk P. Brovka Str. , 6 Tel/fax: +375 17 2938939 Dr. , Prof. Leonid Lynkov, Research supervisor of the Lab of Advanced Materials and Elements for Electronics and Superconductive Electronics, Head of the Information Security Department Email: leonid@bsuir. by