CRLH-TLComposite Right-/left-Handed Transmission Line
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To satisfy the demand, a CRLH-TL composed of lumped capacitors and inductors is constructed, which exhibits 0[degrees] phase shift every [[lambda].
In this section, the working principle of the proposed array and CRLH-TL are presented.
In this paper, two different Doherty power amplifiers are designed and implemented, DPA with traditional [lambda]/4 transmission line and DPA with CRLH-TL, experimental results and comparisons between the two DPAs are also presented.
For the symmetric CRLH-TL filter using CRLH unit-cells, the corresponding common-mode equivalent circuit is composed of two series LC resonators and shunt capacitors, owing to the virtual open in the center line.
A 50 [ohm] coplanar waveguide (CPW) is used as a parallel excitation for both the CRLH-TL unit cell and meandered monopole.
The proposed CRLH-TL consists of a structure of spiral inter-digital and stub short line with via, whose radius is 0.
On the other, the modified Wilkinson power divider proposed in [9] makes use of a one-stage Wilkinson power divider in combination with a conventional microstrip transmission line and a CRLH-TL whose unit cell is composed by [L.
Recently, DGS structure is used to implement via-less unbalanced CRLH-TL [31, 32], however, the microstrip DGS balanced CRLH-TLs have been rarely reported.
Cui, "Arbitrarily dual-band components using simplified structures of conventional CRLH-TLs," IEEE Trans.
In our earlier work, we proposed a novel CRLH-TL [14], where good balance was kept, while the length of proposed TL was changed.
Liang, "Novel CRLH-TL metamaterial and compact microstrip branch-line coupler application," Progress In Electromagnetics Research C, Vol.
In paper [5], the structure of CRLH-TLs based on new technology of MIM (metal-insulator-metal) is used to design BLC, the small size is also realized, but the coupler based on CRLH-TLs cannot be used in the situation which is sensitive to phase-changing.