A new dual‐band single‐ended‐to‐balanced filtering power divider. Issue 6 (18th March 2020)

• Record Type: Journal Article
• Authors: Li, Sai; Tang, Wenlai; Wang, Jianpeng; Wang, Xuedao; Yang, Jiquan
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 30:Issue 6(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-03-18
• Subjects: double‐sided parallel‐strip line (DSPSL) -- dual‐band -- filtering power divider -- single‐ended‐to‐balanced (SETB) -- step impedance stubs (SIS); Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.22194
• Languages: English
• ISSNs: 1096-4290

Abstract

Abstract: This article proposes a new dual‐band single‐ended‐to‐balanced (SETB) filtering power divider (FPD), which shows the excellent characteristics of wideband common‐mode (CM) suppression and good selectivity. By employing the structure of double‐sided parallel‐strip line with a mid‐inserted conductor and a T‐shaped defected ground structure etched in the mid‐inserted conductor, out‐of‐phase behavior and high CM suppression can be achieved successfully. Besides, to realize dual‐wideband filtering performance and high selectivity, two pairs of step impedance stubs (SIS) loaded quarter‐wavelength central line‐terminal‐shorted three parallel‐coupled microstrip lines structure are adopted. Meanwhile, two pairs of resistors are introduced so as to realize excellent isolation. To verify effectiveness of the design method, a prototype of dual‐band SETB FPD which operates at 3.2 and 4.9 GHz is designed, fabricated, and tested. Final results exhibit that the new dual‐band SETB FPD possess high selective dual‐band differential mode response, wideband CM suppression, and excellent isolation between the balanced output ports.