Design of compact dual‐mode dual‐band filtering power divider with high selectivity

Abstract

A new design method for a compact dual-mode dual-band filtering power divider is proposed. To achieve two transmission poles in both of the two passbands, the odd-and even-mode resonant properties of the dual-mode resonator are employed in the design. By symmetrically locating four dual-mode resonators at both sides of the main transmission line and choosing the proper output topology, the introduced circuit can successfully realise the dual-band power division and filtering selectivity property. Two resistors are utilised to achieve good in-band isolation performance of the filtering power divider. For demonstration, a dual-band filtering power divider with two passbands centred at 2.2 and 2.7 GHz was designed and measured. Simulated and measured results are provided which show a good agreement.

Dual-band filtering power divider with widely separated passbands

“…The filtering power divider (FPD) is such an integrated device that provides both frequency band selection as a filter and power splitting/combining as a PD. For dual‐band operation and application, dual‐band FPDs (DB‐FPDs) are desired and have been developed …”

“…By employing gap‐coupled dual‐mode resonators in two routes, a DB‐FPD was presented in Ref. . A dual‐wideband FPD based on a stub loaded three‐coupled lines has also been reported in Ref.…”

A novel dual‐band filtering power divider using SIR and MDS

“…As one of the most important front‐end components, dual‐ or multiband filtering power dividers with good performance have been achieved substantial progress . In recent years, various methods have been proposed . In Ref.…”

Tunable dual-mode filtering power divider with harmonic suppression

“…It is an effective way to achieve both multiple functions and small size by using electrically tunable technology as reported to realize tunable filters with central frequency tuning [1,2,3]. Integrating multiple components into a one is also a promising way for size reducing and multiple functions can also be obtained at the same time such as filtering power dividers [4,5,6,7,8,9], which consists of a filter and a power divider. In [4], filtering power dividers are realized by adding filtering structure to the input or output lines.…”

“…Moreover, in [5], bandpass filters are used to replace the transmission lines between the input port and isolation resistor to realize filtering power dividers. Multimode resonators are also used to achieve multimode and multiband filtering power dividers as reported in [6]. In [9], the authors presented a novel frequency-agile filtering power divider with constant absolute bandwidth and high selectivity.…”