A WR4 Amplifier Module Chain With an 87 K Noise Temperature at 228 GHz

作者：Varonen Mikko^*; Samoska Lorene; Fung Andy; Padmanabhan Sharmila; Kangaslahti Pekka; Lai Richard; Sarkozy Stephen; Soria Mary; Owen Heather; Reck Theodore; Chattopadhyay Goutam; Larkoski Patricia V; Gaier Todd

来源：IEEE Microwave and Wireless Components Letters, 2015, 25(1): 58-60.

DOI：10.1109/LMWC.2014.2369963

• Cryogenic
• InP HEMT
• low-noise amplifiers (LNAs)
• MMIC

In this letter we report an ultra-low-noise amplifier module chain in the WR4 frequency range. The amplifier chips were fabricated in a 35 nm InP HEMT technology and packaged in waveguide housings utilizing quartz E-plane waveguide probes. When cryogenically cooled to 22 K and measured through a mylar vacuum window, the amplifier module chain achieves a receiver noise temperature of 87 K at 228 GHz and less than a 100 K noise temperature from 217 to 236 GHz. The LNA modules have 21-31 dB gain and the power dissipation is 12.4-15.8 mW. To the best of authors' knowledge, these are the lowest LNA noise temperatures at these frequencies reported to date.

• 出版日期2015-1