A Compact Enhanced-Bandwidth Hybrid Ring Using an Artificial Lumped-Element Left-Handed Transmission-Line Section

2004 ◽  
Vol 52 (3) ◽  
pp. 798-804 ◽  
Author(s):  
H. Okabe ◽  
C. Caloz ◽  
T. Itoh
Keyword(s):  
Transmission Line ◽  
Lumped Element ◽  
Left Handed ◽  
Line Section ◽  
Hybrid Ring

Tunable microwave devices based on left/right-handed transmission line sections in multilayer implementation

2009 ◽  
Vol 1 (4) ◽  
pp. 323-329 ◽  
Author(s):  
Polina Kapitanova ◽  
Dmitry Kholodnyak ◽  
Stefan Humbla ◽  
Ruben Perrone ◽  
Jens Mueller ◽  
...  
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Degrees Of Freedom ◽  
Dual Band ◽  
Microwave Devices ◽  
Lumped Element ◽  
Left Handed ◽  
Band Filter ◽  
Unit Cells ◽  
Spurious Response

Metamaterial transmission lines can be realized as a combination of right- and left-handed transmission line (TL) sections exhibiting positive and negative dispersion. This approach gives additional degrees of freedom for improving the performance of microwave devices. Artificial right- and left-handed sections, which are based on lumped-element unit cells consisting of inductance and capacitances (LC-cells), are used. This makes it possible to decrease dimensions of the devices drastically. Furthermore, using variable capacitors in LC-cells allows designing tunable devices. This paper presents the results of design, numerical simulation, and experimental investigation of a tunable rat-race ring and free-of-spurious response dual-band filter manufactured as integrated ceramic multilayer circuits based on low-temperature co-fired ceramics. Commercial semiconductor varactors have been used as tunable components.

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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