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Journal Science Intensive Technologies №4 for 2016 г.
Article in number:
The application of principle electrodynamic similarity and special materials for reducing the size emitter
Keywords: ANSYS HFSS principle of electrodynamic similarity special material with permittivity and permeability equal to 10 reducing the size of the existing emitters frequency response and radiation pattern
Authors:
A.S. Godin - Engineer, JSC «RPC «LEMZ» (Moscow). E-mail: andrey.godin@gmail.com M.S. Matsayan - Engineer, JSC «RPC «LEMZ» (Moscow). E-mail: mik7379@gmail.com D.S. Gezha - Head of Department, LLC «Metriktest» (Moscow). E-mail: dmitry.gez@gmail.com K.N. Klimov - Dr. Sc. (Eng.), Leading Research Scientist, JSC «RPC «LEMZ» (Moscow), Professor, MIEM HSE (Moscow). E-mail: const0@mail.ru
Abstract:
Principle of electrodynamic similarity is widely used in the design of ultra-wideband antennas [1−2]. This principle also applies when it is necessary to translate the existing structure in a different frequency range [3]. Demonstrate the possibility of applying the principle of electrodynamic similarity, to reduce the size of emitters, reducing the wavelength without changing the frequency range. This can be achieved by placing the Emitter per ball of material in which the permittivity and permeability increased in N times. The geometry of the emitter is also reduced by in N times [4−8]. If we combine the phase center of the emitter with the center of the ball from the material, it can be expected that the radiation pattern will not change. Because we have chosen a material having a dielectric permittivity and magnetic permeability in N times greater than that of a vacuum, then from the boundary of the material with the vacuum will not occur reflected propagating wave. Around the emitter in addition to the spherical propagating wave exist waves higher (nonpropagating) types. Therefore it is necessary to explore the question of what should be the radius of the sphere from the material chosen to not change the frequency response of VSWR and radiation pattern of the emitter [4−5]. As an example, consider a the gap in metal which is fed on rectangular metallic waveguide.
Pages: 3-13
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