A Ka-BAND LOW-NOISE AMPLIFIER USING SEMICIRCLE STACKED-GCPW TRANSMISSION LINE

作者：Chiu Hsien Chin^*; Chen Ting Huei; Fu Jeffrey S; Nirmalathas T A

来源：Microwave and Optical Technology Letters, 2011, 53(5): 1131-1134.

DOI：10.1002/mop.25910

• low-noise amplifiers
• SCS-GCPW
• 0.18-mu m CMOS

A high-gain Ka-band 0.18-mu m CMOS low-noise amplifier with semicircle stacked grounded coplanar waveguide (SCS-GCPW) structure transmission line is proposed. SCS-GCPW transmission line is adopted to reduce the signal loss by shaping the electric fields under the signal line especially at microwave and millimeter wave applications. The SCS-GCPW demonstrated a similar electric field distribution of coaxial cable and achieved a substrate dielectric attenuation constant of 0.075 Np/m. It is superior to 0.081 Np/m and 0.144 Np/m of traditional microstrip transmission line and CPW transmission line, respectively. By adopting the low loss SCS-GCPW transmission line, the Ka-band LNA demonstrated a 24.5 dB gain together with a noise figure (NF) of 7.5 dB at 33 GHz operation. The measured output power 1 dB compression point (P(1) (dB)) was -2 dBm. The dc power consumption was 40 mW and chip size was 0.6 x 1 mm 2 for this Ka-band LNA.

• 出版日期2011-5
• 单位长春大学