scholarly journals REALIZATION OF COMPOSITE RIGHT/LEFT-HANDED TRANSMISSION LINE USING COUPLED LINES

2009 ◽  
Vol 92 ◽  
pp. 299-315 ◽  
Author(s):  
Aya Fekry Abdelaziz ◽  
Tamer Mostafa Abuelfadl ◽  
Osman Lotfy Elsayed
Keyword(s):  
Transmission Line ◽  
Left Handed ◽  
Coupled Lines

A linearity improved quad-band amplifier based on E-CRLH transmission line

2017 ◽  
Vol 9 (8) ◽  
pp. 1603-1610
Author(s):  
Rasool Keshavarz ◽  
Abbas Mohammadi ◽  
Abdolali Abdipour
Keyword(s):  
Transmission Line ◽  
Insertion Loss ◽  
Characteristic Impedance ◽  
Design Procedure ◽  
Output Port ◽  
New Class ◽  
Left Handed ◽  
Coupled Lines ◽  
5 Ghz ◽  
Operation Frequency

This paper outlines a new class of quad-band amplifier (QBA) realized using extended composite right- and left-handed coupled lines. The design procedure to reach the QB CLs with predefined frequency operations and characteristic impedance of their ports is clearly presented. Designed and fabricated QBA operation frequencies are$f_{b_{1}} = 2.9\,GHz$and${\rm \;} f_{b_2} = 4.3\,GHz$(output port B)${\bi \;} \; f_{f_1} = 3.8\,GHz\; $and$\; \; f_{f_2} = 5\,GHz\; $(output port C) and the proposed structure exhibits a matching (−10 dB) bandwidth of over 300 MHz in each operation frequency bands. In addition, the insertion loss is smaller than 1 dB. The length and the width of the proposed QBA are approximately 7.7 and 2.4 cm, respectively. To further demonstrate the idea, a QBA is successfully designed and fabricated. The simulated and measured results of the proposed QBA are presented to verify the proposed idea.

Composite right/left-handed transmission line with array of thermocouples for generating terahertz radiation

2020 ◽  
Vol 92 (2) ◽  
pp. 20502
Author(s):  
Behrokh Beiranvand ◽  
Alexander S. Sobolev ◽  
Anton V. Kudryashov
Keyword(s):  
Transmission Line ◽  
Terahertz Radiation ◽  
Transmission Lines ◽  
Software Package ◽  
Optical Pulses ◽  
Capacitively Coupled ◽  
Voltage Difference ◽  
Left Handed ◽  
Microwave Transmission ◽  
Commercial Software Package

We present a new concept of the thermoelectric structure that generates microwave and terahertz signals when illuminated by femtosecond optical pulses. The structure consists of a series array of capacitively coupled thermocouples. The array acts as a hybrid type microwave transmission line with anomalous dispersion and phase velocity higher than the velocity of light. This allows for adding up the responces from all the thermocouples in phase. The array is easily integrable with microstrip transmission lines. Dispersion curves obtained from both the lumped network scheme and numerical simulations are presented. The connection of the thermocouples is a composite right/left-handed transmission line, which can receive terahertz radiation from the transmission line ports. The radiation of the photon to the surface of the thermocouple structure causes a voltage difference with the bandwidth of terahertz. We examined a lossy composite right/left-handed transmission line to extract the circuit elements. The calculated properties of the design are extracted by employing commercial software package CST STUDIO SUITE.

A Multilayer Compact Solid State Composite Right/Left-Handed Metamaterial Transmission Line

2008 ◽  
Vol 29 (12) ◽  
pp. 1383-1385 ◽  
Author(s):  
Zhirun Hu ◽  
Philip D. Curtis ◽  
Wei Tong
Keyword(s):  
Solid State ◽  
Transmission Line ◽  
Left Handed
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