Self and mutual impedances of a finite length gas-insulated transmission line (GIL)

2007 ◽  
Vol 77 (3-4) ◽  
pp. 191-203 ◽  
Author(s):  
Zygmunt Piatek
Keyword(s):  
Transmission Line ◽  
Finite Length

scholarly journals On the Relation between Composite Right-/Left-Handed Transmission Lines and Chebyshev Filters

2009 ◽  
Vol 2009 ◽  
pp. 1-8 ◽  
Author(s):  
Changjun Liu ◽  
Wolfgang Menzel
Keyword(s):  
Transmission Line ◽  
Finite Length ◽  
Transmission Lines ◽  
High Order ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Practical Applications ◽  
Left Handed ◽  
Chebyshev Filters ◽  
Chebyshev Filter

Composite right-/left-handed (CRLH) transmission lines have gained great interest in the microwave community. In practical applications, such CRLH sections realized by series and shunt resonators have a finite length. Starting from the observation that a high-order Chebyshev filter also exhibits a periodic central section of very similar structure, the relations between finite length CRHL transmission lines and Chebyshev filters are discussed in this paper. It is shown that a finite length CRLH transmission line in the balanced case is equivalent to the central part of a low-ripple high-order Chebyshev band-pass filter, and a dual-CRLH transmission line in the balanced case is equivalent to a low-ripple high-order Chebyshev band-stop filter. The nonperiodic end sections of a Chebyshev filter can be regarded as matching sections, thus leading to an even better amplitude and phase response. It is also shown that, equally to a CRHL transmission line, a Chebyshev filter exhibits negative phase velocity in part of its passband. As a consequence, an improved behavior of finite length CRLH transmission lines may be achieved adding matching sections based on filter theory; this is demonstrated by a simulation example.

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