X-Band Reflection-Type Phase Shifters Using Coupled-Line Couplers on Single-Layer RF PCB

Johannes J.P. Venter, Tinus Stander, Philippe Ferrari

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

In this letter, an X-band reflection-type phase shifter is presented. It is based on a single-layer stub-loaded coupled-line coupler loaded by two-varactor tuning circuits. This choice of coupler significantly improves on the phase shifter bandwidth achievable with a branch-line coupler, as it features a lower phase imbalance across the band of interest. The proof-of-concept prototype achieves better than 10-dB return loss across a 20% fractional bandwidth. The phase shifter further exhibits insertion loss of 2.1 ± 1.3 dB and maximum phase shift of 392° at 10 GHz, leading to a state-of-the-art figure of merit at X-band of 115°/dB. The occupied area is 0.25λg 2.

Original languageEnglish
Article number8418752
Pages (from-to)807-809
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume28
Issue number9
DOIs
Publication statusPublished - Sept 2018
Externally publishedYes

Keywords

  • Bandwidth
  • reflection-type phase shifter (RTPS)
  • varactors
  • X-band

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'X-Band Reflection-Type Phase Shifters Using Coupled-Line Couplers on Single-Layer RF PCB'. Together they form a unique fingerprint.

Cite this