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Numerical and experimental investigation of basic properties of wire medium‐based shortened horn antennas
Author(s) -
Hrabar Silvio,
Bonefacic Davor,
Muha Damir
Publication year - 2009
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.24736
Subject(s) - horn antenna , french horn , slab , microwave , feed horn , high gain antenna , directional antenna , antenna (radio) , optics , physics , materials science , acoustics , engineering , electrical engineering , slot antenna , structural engineering , antenna measurement , telecommunications , periscope antenna
Recent numerical study predicted a phenomenon of gain increase of a shortened horn antenna by embedding a wire medium‐based slab. Here, we report an experimental verification of this idea by the development of two shortened horn antennas that operate in 10 GHz band: the horn with embedded single‐wire ENZ slab and the horn with embedded double‐wire ENZ slab. These two horn antennas had lengths of 52% and 33% of the length of the optimal horn, respectively. Measured gain was found to be very similar to the gain of the full‐length optimal horn (within 0.1 dB), but in a narrow band (5–12%). In addition, we present numerical results that show that a Drude model is a good starting point for the initial design of a shortened horn, while the required antenna characteristics should be achieved by an additional numerical optimization. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2748–2753, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24736