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In this paper, a compact two-section half-wave balun using artificial transmission lines is presented. The developed balun comprises four sections of artificial transmission lines, including two sections realized with lumped chip capacitors and via holes. The theoretical performance of the proposed balun is verified through circuit simulations and measurements of a fabricated prototype at 0.9 GHz...
A novel directional coupler from composite right/left-handed transmission line and artificial transmission line is presented in this paper. The proposed couplers with 6 dB, 10 dB, and 20 dB coupling coefficients are implemented with printed circuit board. The simulated and measured results are compared and analyzed. Simulated results agree well with measured results. The experimental results show...
A planar diplexer using a metamaterial directional coupler is presented. It is composed of a conventional microstrip line and a metamaterial transmission line, which is a dual composite right/left-handed (D-CRLH) transmission line. The metamaterial coupler works in dual modes and leads to alternative coupling coefficients. At the right-handed mode, it is under weak coupling condition. It works under...
This letter presents a novel design of a microstrip low- pass filter (LPF) with an embedded band-stop structure, which is constructed from a simple two transmission line band-stop filter. The band-stop structure is ingeniously embedded into a classical step-impedance microstrip LPF. The stop-band of the proposed LPF is more than two times broader than the original design, while its cut-off frequency...
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