Title :
A photonic-tunable cryogenically cooled W-band subharmonically-pumped GaAs HEMT diode mixer module
Author :
Hwang, Yuh-Jing ; Han, Chih-Chiang ; Huang, Yau-De
Author_Institution :
Acad. Sinica Inst. of Astron. & Astrophys., Taipei, Taiwan
Abstract :
A W-band subharmonically pumped (SHP) diode mixer module is designed, fabricated and tested for broadband astronomical applications. The packaged module performance is measured and compared under room-temperature and cryogenic environment. In summary, compared to the room-temperature performance, when the SHP diode mixer is operated under cryogenic environment, the LO power requirement is increased by 2 dB and conversion loss is reduced by 3-5 dB. Under cryogenic environment, the effect of red-light illumination to the HEMT Schottky diode is explored, the measured results indicates the existence of excess photocurrent is capable to fine-tune the conversion loss of the mixer.
Keywords :
III-V semiconductors; Schottky diode mixers; astronomical instruments; cryogenics; gallium arsenide; high electron mobility transistors; HEMT Schottky diode; SHP diode mixer; W-band subharmonically-pumped HEMT diode mixer module; broadband astronomical applications; cryogenic environment; packaged module performance; photocurrent; photonic-tunable cryogenical cooling; red-light illumination; temperature 293 K to 298 K; Cryogenics; Extraterrestrial measurements; Gallium arsenide; HEMTs; Lighting; Loss measurement; Packaging; Performance loss; Schottky diodes; Testing;
Conference_Titel :
Microwave Integrated Circuits Conference, 2009. EuMIC 2009. European
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4749-7
