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. ; Sota, Yasuhiro ; 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 implementation without any via-holes, because amplitude and phase imbalance, caused by the inductance included in the wires and leads of a package, can be reduced for circuits connected to the ground plane. A developed L-band MMIC achieves good quadrature detection characteristics.
Keywords :
MMIC mixers; UHF integrated circuits; UHF mixers; UHF phase shifters; radio receivers; 1.4 to 1.7 GHz; L-band MMIC; balance type 90 degree phase shifter; direct conversion receivers; high pass filters; low cost monolithic IC; low pass filters; monolithic even harmonic quadrature mixer; quadrature detection characteristics; Costs; Inductance; Integrated circuit packaging; Joining processes; L-band; Low pass filters; Monolithic integrated circuits; Phase shifters; Power harmonic filters; Wires;
Conference_Titel :
Microwave Symposium Digest, 1998 IEEE MTT-S International
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-4471-5
DOI :
10.1109/MWSYM.1998.689350
