scholarly journals DOUBLE PERIODIC COMPOSITE RIGHT/LEFT HANDED TRANSMISSION LINE BASED LEAKY WAVE ANTENNA BY SINGULAR PERTURBATION METHOD

2012 ◽  
Vol 132 ◽  
pp. 113-128 ◽  
Author(s):  
Manisha D. Mujumdar ◽  
Jin Cheng ◽  
Arokiaswami Alphones
Keyword(s):  
Singular Perturbation ◽  
Transmission Line ◽  
Perturbation Method ◽  
Leaky Wave ◽  
Singular Perturbation Method ◽  
Left Handed ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
Periodic Composite

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.

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