Title :
Compacted Ka-Band CMOS Rat-Race Hybrid Using Synthesized Transmission Lines
Author :
Wang, Sen ; Tzuang, Ching-Kuang C.
Author_Institution :
Nat. Taiwan Univ., Taipei
Abstract :
This paper presents a compact Ka-band rat-race hybrid using synthesized transmission lines (TLs) so-called complementary-conducting strips transmission line (CCS-TL). The hybrid is realized by two-dimensional (2D) meandered CCS-TLs on silicon substrate with a thickness of 480 mum. The first-pass design was fabricated by using CMOS 0.18 mum 1P6M technology and characterized by performing on-wafer measurements. The experimental results, which show a good agreement with the theoretical data, demonstrate the viable approach of the on-chip CCS-TLs. The prototype has an isolation of 20 dB from 26.0 GHz to 36.0 GHz. The input reflection-loss of each port is lower than -15dB from 27.0 GHz to 39.0 GHz. The effective area of the prototype is 600 mum by 460 mum.
Keywords :
CMOS integrated circuits; microstrip circuits; microwave integrated circuits; millimetre wave circuits; silicon; transmission lines; CMOS technology; Ka-band CMOS rat-race hybrid; Si; complementary-conducting strips transmission line; frequency 26.0 GHz to 36.0 GHz; frequency 27.0 GHz to 39 GHz; microstrip circuits; millimeter wave circuits; on-wafer measurements; silicon substrate; size 0.18 mum; size 460 mum; size 480 mum; size 600 mum; synthesized transmission lines; two-dimensional meandered CCS-TL; CMOS technology; Carbon capture and storage; Distributed parameter circuits; MMICs; Millimeter wave technology; Power transmission lines; Radio frequency; Strips; Transmission line theory; Transmission lines; Ka-band; RF CMOS; compact-size; hybrid coupler; microstrip circuits; millimeter wave circuits; slow wave;
Conference_Titel :
Microwave Symposium, 2007. IEEE/MTT-S International
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0688-9
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2007.380231
