A sheared transmission-line metamaterial unit cell with a full material tensor

2011 ◽  
Author(s):  
M. Selvanayagam ◽  
G. V. Eleftheriades
Keyword(s):  
Transmission Line ◽  
Unit Cell ◽  
Material Tensor

Liquid crystal-based tunable CRLH-transmission line for leaky wave antenna applications at Ka-Band

2014 ◽  
Vol 6 (3-4) ◽  
pp. 325-330 ◽  
Author(s):  
María Roig ◽  
Matthias Maasch ◽  
Christian Damm ◽  
Rolf Jakoby
Keyword(s):  
Liquid Crystal ◽  
Transmission Line ◽  
Unit Cell ◽  
Leaky Wave ◽  
Ka Band ◽  
Left Handed ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
Operation Frequency

In this work, a liquid crystal based tunable composite right/left-handed transmission line for future leaky wave antennas working at the Ka-band is presented. The tuning of the liquid crystal is achieved by means of magnetic and electric biasing. For this purpose, different prototypes are fabricated for each biasing technique and their dispersive characteristics compared. Electric tunability is achieved by implementing highly resistive bias lines in the unit cell layout. Both techniques yield similar tuning capabilities at the operation frequency of 27GHz whereas the electric one has the advantage of being easily integratable in the layout.

Enhanced CRLH Transmission Line Performances Using a Lattice Network Unit Cell

2009 ◽  
Vol 19 (7) ◽  
pp. 431-433 ◽  
Author(s):  
F. Bongard ◽  
J. Perruisseau-Carrier ◽  
J.R. Mosig
Keyword(s):  
Transmission Line ◽  
Unit Cell ◽  
Lattice Network

scholarly journals Design of composite right/left-handed transmission line for phase shifter of multi-band base station antenna

2018 ◽  
Vol 5 ◽  
pp. 12
Author(s):  
Naobumi Michishita ◽  
Yoshihide Yamada ◽  
Keizo Cho
Keyword(s):  
Phase Shift ◽  
Transmission Line ◽  
Phase Shifter ◽  
Vertical Plane ◽  
Equivalent Circuit Model ◽  
Base Station ◽  
Unit Cell ◽  
Operating Frequency ◽  
Left Handed ◽  
Multi Band

In multi-band base station antennas, interference toward neighboring cells at low operating frequency in-creases since tilting angle is frequency-independent and beamwidth in the vertical plane increases as de-creasing the operating frequency. In this paper, the realization of the different phase shifts at each frequency is proposed by using the dispersion relation of the composite right/left-handed transmission line. The feasi-bility of the phase shift is clarified by using equivalent circuit model of the unit cell. Next, the dispersion and Bloch impedance of the actual configuration of the unit cell are designed. The inverse phase shift at each frequency is verified experimentally.

Mitigation of common mode noise in bent differential transmission line using curved PBG unit cell

2018 ◽  
Vol 60 (2) ◽  
pp. 347-352 ◽  
Author(s):  
S. R. Ranade ◽  
R. K. Shevgaonkar ◽  
A. Sidhique ◽  
P. H. Rao
Keyword(s):  
Transmission Line ◽  
Unit Cell ◽  
Common Mode ◽  
Differential Transmission
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