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Design of a radiated‐mode multislot leaky coaxial cable
Author(s) -
Ahn ChiHyung,
Yi DongWoo,
Park Wee Sang
Publication year - 2005
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.20817
Subject(s) - harmonics , coaxial cable , passband , coupling (piping) , microwave , antenna (radio) , acoustics , coaxial , electronic engineering , physics , engineering , electrical engineering , optics , telecommunications , band pass filter , mechanical engineering , voltage , cable gland
In this paper, we propose a closed‐form equation and a novel design procedure for suppressing the space harmonics and coupling loss of a radiated‐mode leaky coaxial cable (LCX). The LCX with periodic principal slots is analyzed using Floquet theory, and its radiation usually contains higher radiation harmonics that may cause an uneven coupling loss. A closed‐form equation is derived to determine the orders of the harmonics being suppressed. Consideration of the resonant points makes it possible to choose the operating‐frequency range of the antenna from the passband region, where the level of the resonant points is low. The proposed design procedure, which leads to the suppression of the higher radiation harmonics and longitudinal loss, features the use of additional slots with unequal pitches. A sample LCX antenna is designed, fabricated, and tested at 1800 MHz using the proposed procedure. The measurement results for the coupling loss agree well with the simulation results. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 45: 338–342, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20817