Novel Dual-Band Quasi-0-dB Coupled-Line Coupler Using the Composite Right/Left-Handed Transmission 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...

Dual-Band Branch Line Coupler using CRLH Transmission Lines

A branch-line coupler (BLC) working at two arbitrary frequencies using CRLH transmission lines (TLs) is presented. It is demonstrated that the two operating frequencies can be obtained by tuning the phase slope of the different line sections. A prototype is demonstrated using only microstrip technology.

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

Novel Dual-composite Right/left-handed Transmission Line and Its Application to Bandstop Filter

A novel structure of dual-composite right/left-handed transmission line (D-CRLH-TL) is proposed in this paper, and its electromagnetic characteristics are investigated in theory and simulation. The dispersion curve of the proposed structure has been derived by using Bloch-Floquet theory. The structure is composed with an “H”-shaped defected ground structure (DGS) and two stubs with rectangular ...

Harmonics terminated L-band frequency quadrupler using composite right/ left-handed transmission line

A design method for an L-band frequency quadrupler with composite right/left-handed transmission line is proposed. The left-handed transmission line in the proposed frequency quadrupler suppresses the fundamental component ( f0), while the composite right/left-handed l/4 open stub reduces unwanted higher-order harmonics. From the experimental results, unwanted harmonics are suppressed to achiev...