Sökning: "electronic warfare"

Hittade 5 avhandlingar innehållade orden electronic warfare.

  1. 1. Modeling of a Retrodirective Channel With Active Antenna Arrays for Cross-Eye Jamming

    Författare :Björn Petersson; Martin Norgren; Warren P. du Plessis; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; electronic warfare; antenna array; antenna system; radar countermeasures; jamming; cross-eye; systems modeling; system performance; systems simulation; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : Cross-Eye (CE) jamming is a technique aimed at inducing false target angles in radar measurements. The potential to deceive monopulse radar, a radar type commonly used due to its angular accuracy and resilience against jamming, has captured the interest of Electronic Warfare (EW) system manufacturers. LÄS MER

  3. 2. An electronic warfare perspective on time difference of arrival estimation subject to radio receiver imperfections

    Författare :Johan Falk; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signal processing; Signalbehandling;

    Sammanfattning : In order to ensure secure communication in digital military radio systems, multiple methods are used to protect the transmission from being intercepted by enemy electronic warfare systems. An intercepted transmission can be used to estimate several parameters of the transmitted signal such as its origin (position or direction) and of course the transmitted message itself. LÄS MER

  4. 3. Effects of Lightning Electromagnetic Pulse and High Power Microwaves on Military Electric Systems

    Författare :Stefan Silfverskiöld; Michel Ianoz; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering physics; LEMP; HPM; electronic warfare; anechoic chamber; reverberation chamber; Teknisk fysik; Engineering physics; Teknisk fysik; Electricity; Esp The Study Of Transients and Discharges; elektricitetslära; ssk studiet av transienter och urladdning;

    Sammanfattning : The awareness of the threat posed by Lightning Electromagnetic Pulse (LEMP) and High Power Microwaves (HPM) against the operational reliability of electric systems is rapidly growing. This has led to an increasing need for reliable tools, experimental as well as theoretical, for design, analysis and verification of system immunity against electromagnetic threats. LÄS MER

  5. 4. Analysis and Optimization of Installed Antenna Performance

    Författare :Henrik Frid; B. Lars G. Jonsson; Hugh Griffiths; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : This Ph.D. thesis consists of six papers, which are labeled with roman numerals. Papers I-III have already been presented in a licentiate thesis published in2017, and this Ph. LÄS MER

  7. 5. Dual Band Prime Focus Feed for Satellite Earth Terminals

    Författare :Yogesh Karandikar; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reflector Antenna; Choke Horn; Eleven Feed; satellite earth terminals;

    Sammanfattning : Satellite Communication systems have been studied and developed since long. With more high frequency satellite bands coming in the market, there is a need to develop suchsystems with multi-band or wideband operation with reconfigurable antennas which can provide simultaneous transmit receive capabilities on different polarizations as well as have properties suitable to track the satellite. LÄS MER