The nonreciprocal phenomena of a gyrotropic thin-film waveguide with a grating configuration have been analyzed by the singular perturbation technique with multiple space scales. The analyzed structure can perform both as a grating coupler and an isolator. With low gyrotropy, the beam deflection is
Accurate modeling of the cylindrical wire kernel
β Scribed by Anuraag Mohan; Daniel S. Weile
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 115 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0895-2477
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β¦ Synopsis
Abstract
Many existing numerical techniques used to analyze wire antennas assume the current distribution on the wire to be oneβdimensional (1D). This assumption imposes geometric constraints on the ratio of the wire radius to the discretized antenna segment length. Moreover, many kernel approximations are so inaccurate that higherβorder basis functions for wire modeling are unthinkable. More accurate kernel models are possible, but generally result in infinite series or require complicated integration rules. This work presents a new generalized approach to the modelling of cylindrical wire antennas. The method is not plagued by the aforementioned geometric restrictions and can be extended to model the higherβorder behavior of wires. The numerical results show the method to be both stable and robust. Β© 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 740β744, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21461
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