Design of Bandpass Multiplexer-Integrated Power Dividers

Abstract

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.INDEX TERMS Bandpass filter (BPF), diplexer, multifunction, power divider (PD), triplexer.

Wideband signal combining circuit based on multichannel different‐/same‐frequency power combiner

“…As the communication frequency band becomes more crowded, the different-frequency power combining technology that can combine several narrow-band signals into a wideband signal has emerged. [21][22][23][24][25][26][27] The signal combining circuit is an integrated multifunctional circuit that has multiple functionalities including that of a multiplexer and a power divider. Because of its high integration and low cost, and other advantages can be widely used in radio frequency front-end systems.…”

“…To solve the problem that the output power of an individual solid‐state device is not enough due to its own physical characteristics, same‐frequency power combining technology has been widely used. As the communication frequency band becomes more crowded, the different‐frequency power combining technology that can combine several narrow‐band signals into a wideband signal has emerged 21–27 . The signal combining circuit is an integrated multifunctional circuit that has multiple functionalities including that of a multiplexer and a power divider.…”

“…Because of its high integration and low cost, and other advantages can be widely used in radio frequency front‐end systems. A microstrip diplexer which can realize power dividing with simple structure was proposed in Chen et al 22 The proposed circuit is composed of two independently dual‐mode filtering power divider. A half‐wavelength, open‐circuit transmission line was directly used in the common port, without any additional matching network.…”