CCITL implementation using two-section microstrip transmission lines
Conference proceedings article
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Author list: Limsaengruchi S., Silapunt R., Torrungrueng D.
Publication year: 2012
ISBN: 9781467304627
ISSN: 1522-3965
eISSN: 1522-3965
Languages: English-Great Britain (EN-GB)
Abstract
Conjugately characteristic impedance transmission lines (CCITLs), possessing conjugate characteristic impedances (Z0 ±) of wave propagating in opposite directions, are implemented using a terminated finite lossless reciprocal periodic structure consisting of a unit cell of 2-section microstrip reciprocal lossless transmission lines (TLs). Numerical simulations show the Z0 ± magnitudes of 50±0.24% Ω with their respective arguments ± varying nearly 30° over the frequency range of interest. The S21 magnitude measured from the fabricated 2-section microstrip TL decreases more rapidly with the frequency, than that of the 4-section and reference 50 Ω TLs. It is found that the 2-section TL structure is easier to fabricate than the 4-section structure, with acceptable CCITL characteristics at the certain operating frequency. © 2012 IEEE.
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