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

Novel Symmetrical Coupled-line Directional Coupler Based on Resonant-type Composite Right-/left-handed Transmission Lines

A novel kind of symmetrical backward-wave coupled-line coupler with arbitrary coupling level is proposed in this paper which is based on resonant-type composite right-/left-handed transmission lines (CRLH TLs). First, an equivalent circuit model and procedure for circuit parameters extraction are presented to reveal the inherent nature of the unit cell of the CRLH coupler. Then a CRLH TL compos...

Coupled-Line Couplers Based on the Composite Right/Left-Handed (CRLH) Transmission Lines

Compact Butler matrix using composite right/left handed transmission line

A novel composite right/left handed transmission line (CRLH TL) is proposed, for the first time using the Wunderlich-shaped dentiform capacitor and meandered-line short-circuited stub inductor (SSI). The CRLH TL features a larger value of CL and in turn a lower resonance relative to the previous one employing an interdigital capacitor and an SSI. The unique feature of the CRLH TL is applied to ...

Realization of a Compact Branch-line Cou- Pler Using Quasi-fractal Loaded Coupled Transmission-lines

An extremely compact branch-line coupler operating at 900MHz is presented without the use of via-holes, multilayered technique, or air-bridged. The technique presented here uses the concept of fractals to load a coupled transmission-line in order to realize a compact quarter-wavelength transmission-line, which forms the couplers arms. It is shown that the proposed branch-line coupler’s performa...

Properties of Envelope Pulses Developed in Coupled Nonlinear Composite Right- and Left-handed Transmission Lines

We investigate the properties of nonlinear envelope pulses developed in a coupled composite rightand left-handed (CRLH) transmission line with regularly spaced Schottky varactors. It is found that the dispersive distortion of the envelope pulses carried by each mode is well compensated by nonlinearity introduced by the varactors. In addition, we numerically observe that the collision of two non...