Abstract
In this article, a compact wideband microstrip-to-microstrip (MS-to-MS) vertical transition designed with a slotline stepped-impedance resonator (SIR) is first presented. Compared with the existing wideband transitions, this proposed transition centered at f0 can tremendously extend its upper stopband via two introduced transmission zeros around 3f0 and 5f0. With the designed equivalent circuit, the working principle is theoretically discussed. To realize the size compactness of this proposed wideband transition, the slotline SIR is replaced by two back-to-back connected slotline Y-junctions. Finally, a prototype wideband transition is simulated and fabricated. A wideband filtering response with its upper stopband up to 6.06 GHz under attenuation better than 15 dB is experimentally achieved as expected in the simulation.
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More From: International Journal of RF and Microwave Computer-Aided Engineering
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