K-band 0/180 degrees balanced phase shifter with dc-offset cancellation

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K-band 0°/180° phase shifter MMIC based on balanced structure which can be applied to BPSK or QPSK modulator with dc-offset cancellation is presented. The proposed balanced phase shifter consists of four Lange couplers, two quarter-wave transmission lines and four switches for open and short terminations. The proposed structure implemented in GaAs 0.15-μm low noise pHEMT process ensures stable 0/180° phase shift while common-mode signals due to the mismatch in reflections by open and short are fed to the isolation port. The proposed phase shifter is verified by the phase shift of 179 ± 1.5° with the insertion loss of 4.5 ± 0.8 dB from 17.5 to 22.5 GHz. The fabricated phase shifter size is 2.2 × 2.85 mm including test pads. © The Institution of Engineering and Technology 2013.
Publisher
INST ENGINEERING TECHNOLOGY-IET
Issue Date
2013-09
Language
English
Article Type
Article
Citation

ELECTRONICS LETTERS, v.49, no.19, pp.1234 - 1235

ISSN
0013-5194
DOI
10.1049/el.2013.1666
URI
http://hdl.handle.net/10203/201562
Appears in Collection
EE-Journal Papers(저널논문)
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