A Quad-Band Wilkinson Power Divider Using Generalized NRI Transmission Lines

Design of Dual- And Quad-Band E-CRLH-TLS With Arbitrary Phase Characteristics

“…For instance, as discussed in [6,7], these structures can be designed in fully-printed configurations. Furthermore, as shown in Figure 1(c), the T-shaped E-CRLH-TLs can be constructed with lumped-element components and microstrip technology [12,13]. In this figure, some of the inductors and capacitors of the E-CRLH structure are implemented as lumped elements while others as distributed ones.…”

“…E-CRLH-TLs are metamaterial-based transmission lines, which are, in fact, a hybrid of wellknown Convenient Composite Right-Left Handed (C-CRLH) and Dual Composite Right-Left Handed (D-CRLH) structures [1]. These structures have recently found numerous applications in designing dualand quad-band devices [4][5][6][7][8][9][10][11]. In [4], a quad-band Wilkinson power divider is proposed using E-CRLH structures, having narrow (low) bandwidth at each of its (four) frequency bands.…”

“…These structures have recently found numerous applications in designing dualand quad-band devices [4][5][6][7][8][9][10][11]. In [4], a quad-band Wilkinson power divider is proposed using E-CRLH structures, having narrow (low) bandwidth at each of its (four) frequency bands. The same structure was also used in designing a dual-band Wilkinson power divider [5] while the results in both frequency bands were satisfactory.…”

Electrically Small Resonators for Metamaterial and Microwave Circuit Design

“…The design of devices working at more than two bands is under study. Several generalized models for multiband operation have been proposed (Eleftheriades, 2007;Sisó et al, 2008c) and implementations by means of the CL-loaded approach have been already carried out (Papanastasiou et al, 2008). The fact that resonant-type metamaterial transmission lines exhibit a frequency selective behaviour suggests their application in filter design.…”

Automated synthesis of transmission lines loaded with complementary split ring resonators (CSRRs) and open complementary split ring resonators (OCSRRs) through aggressive space mapping (ASM)

“…Thanks to the presence of such additional elements, metamaterial transmission lines exhibit functionalities not easily achievable in conventional lines, mostly related to the fact that their dispersion can be engineered or tailored to satisfy certain requirements. This extra controllability of the dispersion diagram (and characteristic impedance as well) has open the door to the design and implementation of enhanced bandwidth components [5][6][7], multiband and multifunctional devices [8][9][10], compact filters and diplexers [11,12], backfire-toendfire leaky wave antennas [13,14], etc.…”