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A dual directional coupler with unique asymmetric coupling values at 1.7–2 GHz
Author(s) -
Jung JinWoo,
Roh HyoungHwan,
Park JunSeok
Publication year - 2008
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.23188
Subject(s) - directivity , hybrid coupler , electronic engineering , graphics , engineering , transmission (telecommunications) , dual (grammatical number) , microwave , power dividers and directional couplers , electrical engineering , communications system , computer science , telecommunications , antenna (radio) , art , computer graphics (images) , literature
Radio characteristic evaluations of each component through the entire communication system can be performed by using the signal sampling methods, which give information of the precise statistics and high qualified specifications. Particular modern trends on electrical devices demand extremely miniaturized dimensions to meet the hand‐held system units, such as personal communication services, mobile RFID applications and other possible products including crucial factors of low‐profile and mobility. It is eventually aimed to avoid unnecessary waste of manufacturing products, and guarantee the mobility, ease of use and so forth. Thus the multi‐mode electrical devices providing numerical advances in a single structure are needed and this is the motivation of further experiments. In this study, we propose a novel dual directional coupler design schemes including derivative calculations and its completely manufactured prototype. It has been designed by promoting three parallel coupled transmission lines with novel mathematic formula and auxiliary simulation systems. Outstanding technical features can be high isolation and directivity characteristics and these will be illustrated within the statistical tables and graphics for verification. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 775–780, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23188