NDLI: Electromagnetic environmental effects modeling, simulation & test validation for cosite mitigation

Content Provider	IEEE Xplore Digital Library
Author	Pirich, R. Basanez, C. Anumolu, P.
Copyright Year	2008
Description	Author affiliation: Northrop Grumman Integrated Syst., Bethpage, NY (Pirich, R.; Basanez, C.; Anumolu, P.)
Abstract	Current and future electronic warfare (EW) & intelligence surveillance and reconnaissance (ISR) systems are becoming increasingly more electronically complex with requirements for external antennas and apertures that are susceptible to various sources of electromagnetic interference and compatibility (EMI/EMC). A reduction in EMI may be required in order to ensure interference free operation during active jamming and ISR, as these platforms evolve into more complex, multi-mission ISR networked systems. One of the most difficult EMI/EMC problems that result from integrating many transmitters, receivers and antennas on one platform is cosite EMI. Technologies such as advanced interference cancellation systems, cosite managers, advanced antenna design, and low-loss, multi-port antenna couplers are being investigated to mitigate cosite interference. One type of cosite interference is intermodulation. Intermodulation and intermodulation distortion (IMD) is the result of two or more signals of different frequencies being mixed together, forming additional signals at frequencies that are not, in general, at harmonic frequencies (integer multiples) of either. Sources for intermodulation include amplifiers, mixers, passive devices, antennas structural geometry and nearby objects and selection and corrosion of materials. For antenna systems, a simple approach to this problem is to physically separate the receive antenna from the transmit antenna, on platforms such as aircraft, helicopters, spacecraft, ships, and buildings. However this solution may not be possible due to limited space and other platform constraints. The IMD problem is usually too complex to be accomplished by a single numerical approach because the size of the structure is too large, the material properties and geometries are very complex, the number of parameters are considerable, and range of parameters are very computationally large. Another solution is to develop a cosite interference rejection approach to cancel the coupled power from the interfering coupled signal obtained by the receive antenna. This paper will review very basic to more complicated cosite interference phenomena and approaches to minimize these effects.
Starting Page	1
Ending Page	6
File Size	779690
Page Count	6
File Format	PDF
ISBN	9781424417315
DOI	10.1109/LISAT.2008.4638956
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-05-02
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Receiving antennas Interference Transmitting antennas Transmitters Antennas Receivers Electromagnetic interference
Content Type	Text
Resource Type	Article

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