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In this article, a wideband filtering power divider (FPD) is proposed based on a new design scheme originating from the microstrip/slotline broadside‐coupled structure. It is simply composed of one microstrip T‐junction and two transmission lines on the top layer, and a pair of U‐shape slotline resonators as well as one isolation resistor‐loaded slotline stub with a circular slot terminal in the ground plane. The presented FPD stands out by much wider bandwidth, improved performance, and simple design layout. For verification, one prototype FPD is designed and fabricated with a center frequency of 4.0 GHz and a fractional bandwidth of 77.1%. Simulated results coincide well with the measured ones. Results indicate that the new wideband FPD exhibits not only a simple layout without additional loading elements, but also nice port‐to‐port isolation over a whole wide frequency band range, good return losses, and 20‐dB harmonic suppression up to (2.5 f0). [ABSTRACT FROM AUTHOR]

In this letter, a triple‐band filtering power divider (FPD) is proposed for passive circuit implementation with a good isolation. The proposed triple‐band FPD is composed of coupled microstrip lines by applying a comprehensive design method. Based on the design method and developed topology, the employed coupled microstrip resonators, the input/output feedlines as well as isolated resistor are properly arranged to achieve a desired triple‐band filtering and isolation response. To validate our design concept and method, a triple‐band FPD operating at 2.3–2.33, 2.39–2.42, and 2.5–2.53 GHz is implemented with good return loss and isolation. Measured and simulated results are in good agreement. [ABSTRACT FROM AUTHOR]

In this paper, analysis and design of a new triple‐band filtering power divider (FPD) with sharp selectivity is presented. Based on the provided analytical equations and synthesis design, the proposal reveals its powerful capacity in design of a triple‐band FPD with any prespecified quasi‐elliptic responses and high isolation and matching, which are very promising for multi‐band modern wireless communications systems. To verify the design method, a triple‐band microstrip FPD prototypes are designed, fabricated, and measured for demonstration. Measured results are found to coincide well with simulated ones, which verify the feasibility of the proposed design method. [ABSTRACT FROM AUTHOR]

This study presents a new reconfigurable quasi‐elliptic filtering power divider (FPD) with tunable centre frequency (CF) and bandwidth (BW) by exploring singly one varactor‐loaded triple‐mode resonator. Avoiding the need for the variable couplings of the inter‐resonant nodes and external input/output, the reconfigurability of the proposed FPD is achieved by only tuning the resonant nodes of the triple‐mode resonator. Compared to the other reported ones, the proposed FPD not only exhibits better performance, but also compact and concise topology with the reduced number of resonators and loaded varactors. For demonstration, a prototype of tunable FPD is implemented following the given design procedure. Measured results coincide well with simulated ones, exhibiting that tunable CF (1.5–1.91 GHz), 1‐dB BW (80–300 MHz) with better in‐band isolation (>18 dB). [ABSTRACT FROM AUTHOR]

This Letter presents a miniaturised wide tuning-range four-way filtering power divider (FPD). It is mainly developed by integrating a co-shared varactor-loaded quasi-lumped-element dual-mode resonator and an isolation resistor, achieving a wide tuning power division ratio (PDR) and centre frequency (CF) simultaneously. The presented tunable four-way FPD stands out from those in the literature, by both its improved performance (wider tuning range for PDR and CF with nice isolation and matching) and ultra-compact design layout. To validate the design concept, a reconfigurable prototype is designed, fabricated, and tested. Measured results will coincide with the simulated ones. [ABSTRACT FROM AUTHOR]