Compact S -/ Ka-Band CMOS Quadrature Hybrids With High Phase Balance Based on Multilayer Transformer Over-Coupling Technique

This paper presents compact CMOS quadrature hybrids by using the transformer over-coupling technique to eliminate significant phase error in the presence of low- Q CMOS components. The technique includes the inductive and capacitive couplings, where the former is realized by employing a tightly indu...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2009-03, Vol.57 (3), p.708-715
Main Authors: CHIN, Ting-Yueh, WU, Jen-Chieh, CHANG, Sheng-Fuh, CHANG, Chia-Chan
Format: Article
Language:English
Subjects:
Amplitudes
Applied sciences
Bandwidth
Broadside coupler
Capacitors
Circuit properties
CMOS
Design methodology
Design. Technologies. Operation analysis. Testing
Dielectric, amorphous and glass solid devices
directional coupler
Electric, optical and optoelectronic circuits
Electronics
even-odd mode theory
Exact sciences and technology
Hybrid integrated circuits
Integrated circuits
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Microwave integrated circuits
Microwaves
MMICs
Monolithic integrated circuits
Multilayers
Noise levels
phase balance
Phase measurement
quadrature hybrid
Quadratures
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Size measurement
Transformers
Windings
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Summary:This paper presents compact CMOS quadrature hybrids by using the transformer over-coupling technique to eliminate significant phase error in the presence of low- Q CMOS components. The technique includes the inductive and capacitive couplings, where the former is realized by employing a tightly inductive-coupled transformer and the latter by an additional capacitor across the transformer winding. Their phase balance effects are investigated and the design methodology is presented. The measurement results show that the designed 24-GHz CMOS quadrature hybrid has excellent phase balance within plusmn0.6 deg and amplitude balance less than plusmn 0.3 dB over a 16% fractional bandwidth with extremely compact size of 0.05 mm 2 . For the 2.4-GHz hybrid monolithic microwave integrated circuit, it has measured phase balance of plusmn0.8 deg and amplitude balance of plusmn 0.3 dB over a 10% fractional bandwidth with a chip area of 0.1 mm 2 .
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2009.2013289