Dual-band filtering power divider with widely separated passbands

Abstract

This article presents a dual‐band microstrip filtering power divider with widely separated passbands. The design topology is mainly constructed by two pairs of dual‐mode resonators, an open‐ended input line and two T‐shaped output lines. Owing to the field symmetry at the two sides of the input line, two identical signals are coupled to the resonators and finally transmitted at two output ports. Since each pair of the employed dual‐mode resonators can be independently designed, widely separated dual‐passbands response is specified and derived in this work with the even‐mode/odd‐mode analysis. Moreover, good isolation with wide isolated frequency band is realized by introducing resistors between each pair of resonators. To validate the design concept, a prototype centering at 2.39 and 3.83 GHz is implemented following the given design procedure. Measured results of the fabricated circuit agree well with the simulated ones, exhibit high frequency selectivity, good port‐to‐port isolation, and port matching.

Reconfigurable triple‐band filtering power divider with continuously tunable center frequency using multimode resonators

“…Many FPDs have been proposed, such as Wilkinson/Gysel FPDs, [1][2][3] coupled line prototype-based FPDs, [4][5][6] microstrip-to-slot transition integrated FPDs, 7 substrate integrated waveguide FPDs, 8 and so on. Moreover, multiband FPDs [9][10][11][12][13] have also been researched with wide attention. However, most studies of FPDs are based on fixed response, lack of flexibility.…”

Analysis and design of high selective triple‐band filtering power dividers

“…In recent years, much effort has been made on exploring high-performance multi-band FPDs. Nevertheless, most of researches done so far have focused themselves on the design of dual-band FPDs [4][5][6][7][8] and only a few works are on triple-band FPDs. [9][10][11] For instances, a triple-band FPD has been proposed by replacing coupled shortcircuited stepped-impedance resonators (SIRs) in conventional Wilkinson PD (WPD).…”