Lai - Keck Institute for Space Studies
Lai - Keck Institute for Space Studies
Lai - Keck Institute for Space Studies
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Gate<br />
Bypass<br />
(Large C)<br />
RF_IN<br />
W-Band (94 GHz) ABCS HEMT LNA<br />
VG1 VD1 VG2 VD2 VG3 VD3<br />
Drain Bypass<br />
(Small C, 25-Ω R)<br />
RF_OUT<br />
Substrate Mode Suppression<br />
Vias<br />
2-Finger, 40-µm<br />
Devices<br />
• Broadband Three-Stage Amplifier<br />
– Grounded Coplanar Waveguide (GCPW), with<br />
100-µm substrate<br />
• Low Power, Low-Noise Results<br />
– 5.4 dB Noise Figure with 11.1 dB<br />
Assosciated Gain at 94 GHz<br />
– Total DC Power only 1.8 mW<br />
– 0.6 mW per stage<br />
Associated Gain [dB]<br />
12.000<br />
11.000<br />
10.000<br />
9.000<br />
Associated Gain (Left Axis)<br />
Noise Figure (Right Axis)<br />
6.000<br />
5.750<br />
5.500<br />
5.250<br />
Noise Figure [dB<br />
Northrop Grumman <strong>Space</strong> Technology<br />
12<br />
8.000<br />
5.000<br />
92 93 94 95 96 97 98<br />
Frequency [GHz] GaAs MANTECH, Miami, May 2004<br />
IPRM 2005
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