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  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
, 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 , 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.