A 94-GHz phase inverter-variable gain amplifier in SiGe BiCMOS
Author
Aydoğan, Yiğit
Advisor
Atalar, Abdullah
Date
2017-08Publisher
Bilkent University
Language
English
Type
ThesisItem Usage Stats
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Abstract
Phased array radar systems are capable of steering the beam of radio waves
electronically by adjusting the gain and phase of each antenna element as desired.
In order to achieve that, each element has to have gain/phase control and these
parameters have to be controlled separately. In W-Band designs, constant gain-
360 phase control is di cult to achieve due to parasitic e ects of high frequencies
which may quickly di er across di erent settings. Dividing the phase control task
into di erent blocks in system eases the design di culties. A well developed WBand
technology SiGe BiCMOS is also crucial to achieve high frequencies and
system control.
In this thesis, a 94-GHz SiGe BiCMOS phase inverter with variable gain ampli-
er is developed. Single bit-180 phase inversion enables to use multiple bit-180
phase shifter which is easier to design in W-Band. In addition to that, variable
gain ampli er allows to use this circuit in phased array systems for amplitude
tapering to achieve desired beam forming.