Transmission line and Lange coupler implementations in CMOS

Author

Kärkkäinen, Mikko ; Sandström, Dan ; Varonen, Mikko ; Halonen, Kari A I

Author_Institution

Dept. of Micro & Nanosci., Aalto Univ., Aalto, Finland

fYear

2010

fDate

27-28 Sept. 2010

Firstpage

357

Lastpage

360

Abstract

This paper presents the design, characteristics, and measured results of various passive structures needed in the realisation of millimetre wave radio front ends in CMOS. Transmission lines are inherently scalable in length and, thus, different inductance values can be realised easily using short circuited lines. Three different coplanar waveguide structures were characterised and the benefits and drawbacks are discussed. In addition, we present the design of a Lange coupler for 90-degree division and combination of millimetre-wave signals in nanoscale CMOS. This structure can be used in the realisation of image rejecting or direct conversion millimetre-wave radio front ends in CMOS.

Keywords

CMOS integrated circuits; coplanar waveguides; transmission lines; waveguide couplers; CMOS; Lange coupler implementations; coplanar waveguide structures; direct conversion millimetre-wave radio front ends; image rejecting; millimetre wave radio front ends; millimetre-wave signals; passive structures; transmission line; Attenuation; CMOS integrated circuits; Coplanar waveguides; Couplers; Fingers; Impedance; Metals;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Integrated Circuits Conference (EuMIC), 2010 European

Conference_Location

Paris

Print_ISBN

978-1-4244-7231-4

Type

conf

Filename

5613764