360-DEGREES REFLECTION-TYPE ANALOG PHASE-SHIFTER IMPLEMENTED WITH A SINGLE 90-DEGREES BRANCH-LINE COUPLER

Citation
Tw. Yoo et al., 360-DEGREES REFLECTION-TYPE ANALOG PHASE-SHIFTER IMPLEMENTED WITH A SINGLE 90-DEGREES BRANCH-LINE COUPLER, Electronics Letters, 33(3), 1997, pp. 224-226
Citations number
2
Categorie Soggetti
Engineering, Eletrical & Electronic
Journal title
ISSN journal
00135194
Volume
33
Issue
3
Year of publication
1997
Pages
224 - 226
Database
ISI
SICI code
0013-5194(1997)33:3<224:3RAPIW>2.0.ZU;2-A
Abstract
A small reflection-type 360 degrees analogue phase shifter is realised with four varactors and a 90 degrees branch-line coupler. New design formulas for the phase shift and the insertion loss are derived and ap plied to the circuit optimisation. The phase shifter shows a total pha se shift of 380 degrees and an insertion loss of 4.5+/-0.8dB at 10GHz. The variation of the phase is <4 degrees over the whole range of temp erature from 0 to 50 degrees C.