| Autor: |
T.R. Block, A.K. Oki, Kevin W. Kobayashi, D.C. Streit, Donald K. Umemoto |
| Rok vydání: |
1998 |
| Předmět: |
|
| Zdroj: |
IEEE Journal of Solid-State Circuits. 33:870-876 |
| ISSN: |
0018-9200 |
| DOI: |
10.1109/4.678648 |
| Popis: |
Here we describe a unique Ka-band self-oscillating HEMT-HBT cascode mixer design which integrates an active tunable resonator circuit. The VCO-mixer MMIC integrates GaAs HEMT's and HBT's using selective molecular beam epitaxy (MBE) technology. The HEMT-HBT cascode active mixer operates similarly to a dual-gate mixer. The HBT of the cascode is used to construct a VCO by presenting the base with an HEMT tunable active inductor. The VCO can be tuned from 28.5 to 29.3 GHz while providing /spl ap/0 dBm of output power. Operated as an upconverter, the MMIC achieves 6-9 dB conversion loss over a 31-39 GHz output frequency band. Using these active approaches, both VCO and mixer functions were integrated into a compact 1.44/spl times/0.76 mm/sup 2/ chip area. The active RF integrated circuit (IC) techniques presented here have direct implications to future high complexity millimeter-wave monolithic integrated circuits (MIMICs) for ultrahigh-speed clock recovery and digital radio applications. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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