An even harmonic quadrature mixer with a simple filter configuration and an integrated LTCC module for W-CDMA direct conversion receiver

Mitsuhiro Shimozawa, Kenichi Maeda, Eiji Taniguchi, Keiichi Sadahiro, Takayuki Ikushima, Tamotsu Nishino, Noriharu Suematsu, Kenji Itoh, Yoji Isota, Tadashi Takagi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This paper presents an even harmonic quadrature mixer (EH-QMIX) with a simple filter configuration and an integrated LTCC module including LNAs, band rejection filters (BRFs), and the proposed EH-QMIX for W-CDMA direct conversion receiver (DCR). Since the DCR has no spurious responses, a BRF instead of a high-Q band pass filter can be applicable for eliminating undesired signals and it can be built in the LTCC substrates easily. As LO frequency is half of RF frequency in the EH-QMIX, diplexer can be composed of simple filters and it can be also integrated in the substrates. As a result, the whole RE circuits of the EH-DCR using a proposed EH-QMIX are integrated in the LTCC module and miniaturization of the receiver is achieved. Moreover, in order to suppress the degradation of the amplitude and the phase imbalances in the quadrature mixer caused by interferences of signals, RE characteristics of the circuits in the mixer such as reflection coefficients, isolations are discussed. A developed LTCC module shows good performances for W-CDMA direct conversion receiver.

Original languageEnglish
Pages (from-to)473-481
Number of pages9
JournalIEICE Transactions on Electronics
VolumeE89-C
Issue number4
DOIs
Publication statusPublished - 2006 Apr
Externally publishedYes

Keywords

  • Direct conversion receiver
  • Harmonic mixer
  • LTCC
  • Module
  • Quadrature mixer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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