Abstract
The dc and RF characteristics of Ga0.49In0.51 P-In0.15Ga0.85As enhancement-mode pseudomorphic HEMTs (pHEMTs) are reported for the first time. The transistor has a gate length of 0.8 μm and a gate width of 200 μm. It is found that the device can be operated with gate voltage up to 1.6 V, which corresponds to a high drain-source current (IDS) of 340 mA/mm when the drain-source voltage (VDS) is 4.0 V. The measured maximum transconductance, current gain cut-off frequency, and maximum oscillation frequency are 255.2 mS/mm, 20.6 GHz, and 40 GHz, respectively. When this device is operated at 1.9 GHz under class-AB bias condition, a 14.7-dBm (148.6 mW/mm) saturated power with a power-added efficiency of 50% is achieved when the drain voltage is 3.5 V. The measured Fmin is 0.74 dB under IDS = 15 mA and VDS = 2 V.
Original language | English |
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Pages (from-to) | 132-134 |
Number of pages | 3 |
Journal | IEEE Electron Device Letters |
Volume | 24 |
Issue number | 3 |
DOIs | |
State | Published - 03 2003 |
Externally published | Yes |
Keywords
- Enhancement mode
- GaInP
- Pseudomorphic HEMT (pHEMT)
- Single-positive-voltage supply