A novel and simplified topology for vector-sum phase shifters

Trong Khoa Ho, Yang Yang, Forest Zhu, Nemai Chandra Karmakar

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

1 Citation (Scopus)


In this paper, we present a novel and simplified topology for a vector-sum phase shifter. The proposed topology leverages only two biphase modulators (based on 90° and 180° hybrid couplers), Wilkinson power dividers, and variable gain components. The biphase modulators generate the necessary quadrature vectors (±I, ±Q) for vector synthesis. To demonstrate the effectiveness of the proposed approach, a passive Kaband four-bit vector-sum phase shifter was designed using PCB technology. The EM simulation results exhibit a return loss of less than 10 dB across the bandwidth from 36 GHz to 44 GHz for all phase shifts, a phase shift range of 360°, and RMS phase and amplitude errors of 1.9° and 4.4 dB, respectively, at 39 GHz. The average insertion loss (IL) was simulated to be 19.5 dB. Despite its simplicity, the phase shifter structure achieves excellent phase performance, showcasing its potential in practical applications.

Original languageEnglish
Title of host publication2023 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2023
EditorsKonstanty Bialkowski, Amir Ebrahimi, Kamran Ghorbani, James Scott, Yang Yang, Xi Zhu
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages4
ISBN (Electronic)9798350324402
ISBN (Print)9798350324419
Publication statusPublished - 2023
EventIEEE International Symposium on Radio-Frequency Integration Technology 2023 - Cairns, Australia
Duration: 14 Aug 202316 Aug 2023
https://ieeexplore.ieee.org/xpl/conhome/10243164/proceeding (Proceedings)
https://www.rfit2023.org/index_s.php (Website)


ConferenceIEEE International Symposium on Radio-Frequency Integration Technology 2023
Abbreviated titleRFIT 2023
Internet address


  • Ka-band
  • low-cost
  • Microwave phase shifter
  • millimeterwave phase shifter
  • PCB

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