Design of Bandpass Multiplexer-Integrated Power Dividers

This study proposed a novel methodology for designing bandpass multiplexer-integrated power dividers (PDs) that provide frequency division, frequency selection, and power division. New coupling schemes for the multiplexer-integrated PDs were presented to ensure multifunctionality and compactness. Miniaturization was achieved through the common resonator technique. Dual-mode stub-loaded resonators serving as common resonators for various channel passbands were used in the multiplexer-integrated PD to reduce the required number of resonators and thereby considerably reduce the size. Each channel passband can be individually designed using the distributed coupling technique to decrease complexity. For validation, a third-order bandpass triplexer-integrated PD and third-order bandpass quad-channel diplexer-integrated PD were designed and fabricated using microstrip technology. Measurements of the devices were consistent with simulated results. The proposed circuits are compact, multifunctional, highly integrate, high performing, simple, and easy to fabricate; thus, they are suitable for the practical applications, such as multi-standard operation antenna array modules.