Abstract
In this letter, the dual-broadband impedance converter based on multiedge frequency matching techniques is presented. The proposed multiedge frequency matching method can realize the required impedance transformation at more than two frequency points, which makes it possible to break through the bottleneck of narrow band response in a scenario of conventional dual-band matching. A set of equations are derived from the transmission line theory, and then the design parameters of this dual-broadband converter can be easily solved. Besides, the proposed converter has the advantages of adjustable bandwidth at individual passband and high out of band rejection. The measurement results of the fabricated dual-broadband converter show good agreements with the simulations, which confirm the feasibility of the proposed design techniques. Specifically, the reflection coefficients ${S}_{11}$ are less than −15 dB at a passband of 0.83–1.32 GHz and 2.04–2.48 GHz.
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