Title :
A Compact Ka-Band Doubly Balanced Sub-harmonic Mixer
Author :
Lai, Yu-Ann ; Lin, Chih-Ming ; Chang, Chieh-Pin ; Lin, Che-Hung ; Wang, Yeong-Her
Author_Institution :
Nat. Cheng-Kung Univ., Tainan
Abstract :
A novel configuration of double- balanced sub-harmonic mixer using a ring connected anti-parallel diode pair (RAPDP) is presented for operating in 26-30 GHz. The monolithic microwave integrated circuit (MMIC) was implemented with GaAs 0.15 mum PHEMT technology with the compact size of 0.85 x 0.85 mm2. The proposed mixer consists of two spiral transformer baluns and a band-reject filter. The RF spiral balun with a band-reject filter served by an L-C resonator is used to provide an output port for the IF extraction. The best conversion loss of the sub-harmonic mixer is 12.7 dB and LO-to-RF and LO-to-IF isolations are better than 24 dB and 28 dB respectively.
Keywords :
MMIC mixers; band-stop filters; high electron mobility transistors; resonators; LC resonator; MMIC; PHEMT technology; RAPDP; band-reject filter; ka-band doubly balanced sub-harmonic mixer; monolithic microwave integrated circuit; ring connected antiparallel diode pair; spiral transformer baluns; Diodes; Gallium arsenide; Impedance matching; MMICs; Microwave filters; Microwave integrated circuits; Monolithic integrated circuits; PHEMTs; Resonator filters; Spirals;
Conference_Titel :
Electron Devices and Solid-State Circuits, 2007. EDSSC 2007. IEEE Conference on
Conference_Location :
Tainan
Print_ISBN :
978-1-4244-0637-1
Electronic_ISBN :
978-1-4244-0637-1
DOI :
10.1109/EDSSC.2007.4450156
