Title :
A monolithic even harmonic quadrature mixer using a balance type 90 degree phase shifter for direct conversion receivers
Author :
Shimozawa, M. ; Kawakami, K. ; Ikematsu, H. ; Itoh, K. ; Kasai, N. ; Isota, Y. ; Ishida, O.
Author_Institution :
Inf. Technol. R&D Center, Mitsubishi Electr. Corp., Kanagawa, Japan
Abstract :
This paper proposes a novel circuit configuration of an even harmonic quadrature mixer (EHQMIX) for direct conversion receivers. In this EHQMIX, a 90 degree phase shifter consists of balance type high pass and low pass filters, and it does not require any circuits connecting to the ground plane. So this configuration is suitable for low cost monolithic IC without any via-holes, because amplitude and phase imbalance caused by inductance included in wires and leads of a package for circuits to the ground plane can be reduced. A developed L-band MMIC achieves good quadrature detecting characteristics.
Keywords :
UHF integrated circuits; UHF mixers; UHF phase shifters; radio receivers; EHQMIX; UHF mixers; balance type 90 degree phase shifter; direct conversion receivers; even harmonic quadrature mixer; high pass filters; inductance; low pass filters; quadrature detecting characteristics; Costs; Inductance; Integrated circuit packaging; Joining processes; L-band; Low pass filters; Monolithic integrated circuits; Phase shifters; Power harmonic filters; Wires;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 1998 IEEE
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-4439-1
DOI :
10.1109/RFIC.1998.682082
