Title :
Ultra broadband DC to 40 GHz 5-bit pHEMT MMIC digital attenuator
Author :
Ju, Inkwon ; Noh, Youn-Sub ; Yom, In-Bok
Author_Institution :
Global Area Wireless Technol. Res. Group, Electron. & Telecommun. Res. Inst., Daejon, South Korea
Abstract :
A broadband, DC to 40 GHz 5-bit MMIC digital attenuator has been developed. The attenuator has been fabricated with 0.15 μm GaAs pHEMT process. This attenuator has 1 dB resolution and 23 dB dynamic range. High attenuation accuracy has been achieved over all attenuation range and full 40 GHz bandwidth with the reference state insertion loss of less than 6 dB at 20 GHz. The input and output return losses of the attenuator are better than 14 dB over all attenuation states and frequencies.
Keywords :
HEMT integrated circuits; MMIC; attenuators; microwave filters; 0.15 micron; 20 GHz; 40 GHz; 5 bit; GaAs; high electron mobility transistors; pHEMT MMIC digital attenuator; Attenuation; Attenuators; Circuits; Frequency; Insertion loss; MMICs; PHEMTs; Resistors; Switches; Topology;
Conference_Titel :
Microwave Conference, 2005 European
Print_ISBN :
2-9600551-2-8
DOI :
10.1109/EUMC.2005.1610096
