A Compact V-Band Star Mixer Using Compensated Overlay Capacitors in Dual Baluns

A compact V-band star monolithic microwave integrated circuit mixer has been designed using compensated overlay capacitors in dual baluns for the input of local oscillator and radio frequency ports. The reduced-size balun can be simply realized by shunting overlay capacitor in either input or end of balun. The proposed V-band star mixer achieved a conversion loss of 8.6 dB, the port-to-port isolations better than 18 dB, and an input 1-dB compression point higher than 7.7 dBm at 60 GHz. Moreover, better than 50% length reduction of dual balun was achieved, and chip size of star mixer including pads was less than 0.68 times 0.59 mm2.

[1]  Kyung-Whan Yeom,et al.  A novel 60-GHz monolithic star mixer using gate-drain-connected pHEMT diodes , 2005 .

[2]  Hwann-Kaeo Chiou,et al.  Miniature MMIC star double balanced mixer using lumped dual balun , 1997 .

[3]  Y.X. Guo,et al.  Design of Miniaturized LTCC Baluns , 2006, 2006 IEEE MTT-S International Microwave Symposium Digest.

[4]  K.W. Kobayashi,et al.  A monolithic broadband doubly balanced EHF HBT star mixer with novel microstrip baluns , 1995, IEEE 1995 Microwave and Millimeter-Wave. Monolithic Circuits Symposium. Digest of Papers.

[5]  G. Oltman,et al.  The Compensated Balun , 1966 .

[6]  Chi-Yang Chang,et al.  A 1.5 to 37 GHz ultra-broadband MMIC Mouw's star mixer , 2005, 2005 European Microwave Conference.

[7]  Hao-Hsiung Lin,et al.  A miniature MMIC double doubly balanced mixer using lumped dual balun for high dynamic receiver application , 1997 .

[8]  Hwann-Kaeo Chiou,et al.  Balun design for uniplanar broad band double balanced mixer , 1995 .

[9]  S. A. Maas,et al.  A broadband, planar, doubly balanced monolithic Ka-band diode mixer , 1993, IEEE 1993 Microwave and Millimeter-Wave Monolithic Circuits Symposium Digest of Papers.

[10]  A. M. Pavio,et al.  A monolithic or hybrid broadband compensated balun , 1990, IEEE International Digest on Microwave Symposium.

[11]  S. A. Maas,et al.  Design and performance of a planar star mixer , 1993 .