Dual-Band Filtering Differential Phase Shifter Using Cascaded Wideband Phase Shifter and Bandstop Network With Two Same Phase Shifts

This letter proposes a new design method of dual-band filtering differential phase shifter using cascaded wideband phase shifter and bandstop network. After cascading the bandstop network, the phase shift characteristic of the initial wideband filtering differential phase shifter remains unchanged,...

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Bibliographic Details
Published inIEEE microwave and wireless components letters Vol. 31; no. 3; pp. 261 - 264
Main Authors Qiu, Lei-Lei, Zhu, Lei
Format Journal Article
LanguageEnglish
Published IEEE 01.03.2021
Subjects
Bandstop network
differential phase shifter
Dual band
filtering
Frequency measurement
Impedance
Passband
Phase measurement
Phase shifters
Wideband
wideband phase shifter
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Summary:This letter proposes a new design method of dual-band filtering differential phase shifter using cascaded wideband phase shifter and bandstop network. After cascading the bandstop network, the phase shift characteristic of the initial wideband filtering differential phase shifter remains unchanged, while its wide passband is divided into dual subpassbands. Compared with traditional dual-band-filter-based topology, the proposed cascaded one features the advantage of independently controlled phase and amplitude responses, and can achieve the same phase shifts in two passbands that conventional one cannot. For verification, a dual-band differential phase shifter with two same phase shifts of 90° is designed, fabricated, and measured. Simulated and measured results show good agreement.
ISSN:1531-1309
1558-1764
DOI:10.1109/LMWC.2020.3046247