Title :
94GHz Single-balanced Diode Mixer for FMCW Radar applications
Author :
Ko, Dong-Sik ; Lee, Mun-Kyo ; Dan An ; Lee, Bok-Hyung ; Lim, Byeong-Ok ; LEE, Sang-Jin ; Moon, Sung-Woon ; Jun, Byoung-Chul ; Bang, Seok-Ho ; Park, Jung-Dong ; Kim, Wan-Joo ; Kim, Sam-Dong ; Rhee, Jin-Koo
Author_Institution :
Millimeter-wave INnovation Technol. Res. Center (MINT), Dongguk Univ., Seoul
Abstract :
In this paper, we present a high performance 94 GHz MMIC diode mixer using a 100-nm metamorphic high electron mobility transistor (MHEMT) diode and coplanar waveguide (CPW) 3-dB tandem coupler. A novel single-balanced structure of MHEMT diode mixer was proposed in this work, and 3-dB tandem coupler with the air-bridge structure was used for broadband LO-RF isolation. The fabricated mixer has LO-RF isolation, greater than 19 dB, in 15 GHz bandwidth of 82-97 GHz. The good conversion loss of 14.8 dB was measured at 94 GHz.
Keywords :
CW radar; FM radar; MMIC mixers; coplanar waveguides; diodes; high electron mobility transistors; millimetre wave mixers; waveguide couplers; FMCW radar application; MHEMT diode; MMIC diode mixer; air-bridge structure; coplanar waveguide; fabrication technology; frequency 94 GHz; frequency modulation continuous wave radar; metamorphic high electron mobility transistor; size 100 nm; tandem coupler; Bandwidth; Coplanar waveguides; Couplers; Coupling circuits; Diodes; Millimeter wave radar; Millimeter wave technology; Performance loss; Radar applications; mHEMTs;
Conference_Titel :
Microwave Conference, 2007. APMC 2007. Asia-Pacific
Conference_Location :
Bangkok
Print_ISBN :
978-1-4244-0748-4
Electronic_ISBN :
978-1-4244-0749-1
DOI :
10.1109/APMC.2007.4554650
