Title :
A new uniplanar broad-band singly balanced diode mixer
Author :
Hsu, Pang-Cheng ; Nguyen, Cam ; Kintis, Mark
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
11/1/1998 12:00:00 AM
Abstract :
A new type of completely uniplanar broad-band singly balanced diode mixer, which utilizes a coplanar waveguide (CPW) and slot line as the main transmission lines, is presented. With the radio frequency (RF) swept from 7.1 to 10.5 GHz and the local oscillator (LO) of 3.5 dBm at 7 GHz, the mixer exhibits a conversion loss from 6 to 10 dB. The LO-to-RF isolation is better than 20 dB, and the LO-to-intermediate frequency (IF) and RF-to-IF isolations are more than 36 dB. The mixer also exhibits good return losses at all three ports. It has several desirable features such as simplicity, wide bandwidth, good interport isolations, easy mounting of solid-state devices, and no via-hole ground connections. The uniplanar nature of this mixer makes it very suitable for low-cost microwave and millimeter-wave integrated circuits
Keywords :
MMIC mixers; coplanar waveguides; slot lines; waveguide transitions; 7.1 to 10.5 GHz; CPW to slot line transition; LO-to-IF isolation; LO-to-RF isolation; MMIC; RF-to-IF isolation; conversion loss; coplanar waveguide; easy mounting; hybrid junction; local oscillator; microwave integrated circuits; millimeter-wave integrated circuits; return losses; uniplanar broadband singly balanced diode mixer; wide bandwidth; Bandwidth; Coplanar transmission lines; Coplanar waveguides; Diodes; Local oscillators; Microwave devices; Millimeter wave integrated circuits; Mixers; Radio frequency; Solid state circuits;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
