Low conversion-loss fourth subharmonic mixers incorporating CMRC for millimeter-wave applications

Author

Xue, Quan ; Shum, Kam Man ; Chan, Chi Hou

Author_Institution

Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China

Volume

51

Issue

5

fYear

2003

fDate

5/1/2003 12:00:00 AM

Firstpage

1449

Lastpage

1454

Abstract

Low conversion-loss millimeter-wave fourth subharmonic (SH) mixer designs are proposed in this paper. A millimeter-wave (35 GHz) fourth SH mixer with four open/shorted stubs is designed and measured. The conversion loss is less than 15 dB within a 2.4-GHz bandwidth. The minimum loss is 11.5 dB at the center frequency. By replacing two of the shunt stubs with a dual-frequency in-line stub consisting of newly developed compact microstrip resonating cells (CMRCs), the performance of the SH mixer is improved significantly. At 35 GHz, the conversion loss of this new fourth SH mixer is as low as 6.1 dB with a 3-dB bandwidth of 6 GHz. The conversion loss in the whole Ka-band (26.5-40 GHz) is less than 16 dB. The proposed fourth SH mixer incorporating with CMRCs provides a low-cost high-performance solution for RF subsystem design.

Keywords

circuit resonance; losses; microstrip circuits; millimetre wave mixers; 2.4 GHz; 35 GHz; 6 GHz; 6.1 to 15 dB; CMRC; Ka-band; RF subsystem design; compact microstrip resonating cells; conversion loss; dual-frequency in-line stub; fourth subharmonic mixers; millimeter-wave applications; open/shorted stubs; Bandwidth; Diodes; Metamaterials; Microstrip components; Millimeter wave measurements; Mixers; Periodic structures; RF signals; Radio frequency; Transmission line theory;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2003.810153

Filename

1196172