A new wire-junction node for modeling a junction with two wires of different radius using the TLM method is presented. The scattering matrix of the node is pro¨ided, and the numerical results are compared with the moment method solutions traditionally used for modeling wires and wirelike structures.
Experimental studies of X-band leaky-wave antenna performances
β Scribed by I. Ivanchenko; D. Ivanchenko; A. Korolyov; N. Popenko
- Book ID
- 102518078
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 235 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0895-2477
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β¦ Synopsis
Abstract
In this paper, we present the results of measuring the nearβfield and radiation patterns of a novel leakyβwave antenna. Although the first higher order mode in the antenna can be successfully excited in a wide frequency band, the leakyβwave radiation is limited to a relatively narrow frequency band of about 1.8 GHz. Outside this band, the antenna radiates as a phased array of local oscillators and demonstrates a multiβbeam radiation pattern. Investigations of modified antenna design have revealed new opportunities to improve antenna characteristics by changing the width and location of the impedance transformer, as well as by inserting electrical dipoles at the fixed locations of standing waves formed along the radiating microstrip line. Β© 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 277β281, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10581
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