Title :
A 2GHz quadrature hybrid implemented in CMOS technology
Author :
Frye, Robert C. ; Kapur, Sharad ; Melville, Robert C.
Author_Institution :
Agere Syst., Murray Hill, NJ, USA
Abstract :
We have derived a lumped-element circuit from its coupled line counterpart for a 90°, 3dB hybrid coupler. We discuss the uses, design, and characteristics of such circuits in CMOS technology. We show measured characteristics of an example 50Ω, 2GHz coupler with 65dB of image rejection, 18dB of directivity and a 4.7dB noise figure.
Keywords :
CMOS integrated circuits; UHF integrated circuits; characteristics measurement; directional couplers; integrated circuit measurement; lumped parameter networks; 2 GHz; 4.7 dB; 50 ohm; CMOS; capacitor network; characteristics measurement; coupled-inductor pair; directional couplers; directivity; image rejection; lumped-element circuit; quadrature hybrid coupler; wireless applications; CMOS technology; Coupling circuits; Distributed parameter circuits; Frequency; Impedance; Noise measurement; Phase shifters; Prototypes; Reflection; Resonance;
Conference_Titel :
Custom Integrated Circuits Conference, 2002. Proceedings of the IEEE 2002
Print_ISBN :
0-7803-7250-6
DOI :
10.1109/CICC.2002.1012817
