K-band reflection-type phase shifter using phase-shift range enhancement technique

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This letter presents a simple but efficient phase shift range enhancement technique for a reflection type phase shifter (RTPS). The proposed structure consists of a 3-dB coupler and a pair of back-to-back diodes connected with a pair of series and parallel inductors and a pair of parallel resistors. The parallel inductors are inserted to widen relative phase shift range compared to regularly used RTPS and Lange coupler is used as the 3-dB coupler. The proposed circuit is implemented in 0.15 -m GaAs low noise pHEMT process and provides a measured phase shifting range of 227 degrees at 24 GHz with a measured insertion loss of 4.6 +/- 1.3 dB. The input and output return losses are better than 18 dB and 17 dB, respectively. The size of the fabricated phase shifter MMIC chip is 2.2x1.5 mm(2) including test pads.
Publisher
TAYLOR FRANCIS LTD
Issue Date
2013-11
Language
English
Article Type
Article
Keywords

CONSTANT INSERTION LOSS; DESIGN

Citation

JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS, v.27, no.16, pp.2135 - 2144

ISSN
0920-5071
DOI
10.1080/09205071.2013.833063
URI
http://hdl.handle.net/10203/201504
Appears in Collection
EE-Journal Papers(저널논문)
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