Title :
A 24–48 GHz cascode HEMT mixer with DC to 15 GHz IF bandwidth for astronomy radio telescope
Author :
Tsai, Zuo-Min ; Kao, Jui-Chin ; Lin, Kun-You ; Wang, Huei
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
This paper presents a wide IF bandwidth (dc15 GHz) mixer with 27 to 48 GHz RF bandwidth using cascode device technique. The mixer is implemented in 0.15-mum GaAs PHEMT process. The measured 3-dB IF bandwidth is from dc to 15 GHz and RF bandwidth is from 27 to 48 GHz. This mixer achieves a measured conversion gain of 0 dB and isolation of 23 dB. This is the first demonstration of wide IF bandwidth mixers using GaAs cascode HEMT devices.
Keywords :
III-V semiconductors; gallium arsenide; high electron mobility transistors; microwave mixers; millimetre wave mixers; mixers (circuits); radioastronomy; radiotelescopes; GaAs; GaAs PHEMT process; IF bandwidth; astronomy radio telescope; cascode HEMT mixer; frequency 15 GHz; frequency 24 GHz to 48 GHz; size 0.15 mum; Bandwidth; FETs; Gain; Gallium arsenide; HEMTs; Impedance; Mixers; PHEMTs; Radio astronomy; Radio frequency;
Conference_Titel :
Microwave Integrated Circuits Conference, 2009. EuMIC 2009. European
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4749-7
