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

• Published in: Electronics letters Vol. 51; no. 22; pp. 1795 - 1796
• Main Authors: Cai, Chuantao, Wang, Jianpeng, Deng, Yijing, Li, Jia-Lin
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 22.10.2015
• Subjects: Circuits; compact dual‐mode dual‐band filtering power divider; dual‐mode resonator; even‐mode resonant properties; Filtering; filtering selectivity property; Filtration; frequency 2.2 GHz; frequency 2.7 GHz; high selectivity; Microwave technology; odd‐mode resonant properties; Power dividers; Resistors; resonator filters; Resonators; Selectivity; Simulation; even-mode resonant properties; resonator filters; high selectivity; dual-mode resonator; frequency 2.2 GHz; frequency 2.7 GHz; odd-mode resonant properties; power dividers; compact dual-mode dual-band filtering power divider; filtering selectivity property
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2015.1750

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.