Coplanar integrated mixers for 77-GHz automotive applications

Abstract

For integration in receivers at 77 GHz, three passive mixers, a balanced diode mixer, a single ended and a balanced resistive mixer, as well as an active single-ended gate mixer have been realized in coplanar 0.15-mu m PM-HEMT technology on GaAs. The passive mixers achieved conversion losses of about 9 dB. The resistive mixers required an LO power of only 3 dBm and the diode mixer 10 dBm for optimum conversion. The gate mixer obtained a conversion gain of 1 dB for an LO power of 6 dBm but showed higher sensitivity to the IF load

94 GHz single balanced cascode mixer using CPW tandem couplers

“…In table 2, the LO to RF isolation performance of our single balanced cascode mixer is compared with those of the millimeter wave reported earlier. While reported millimeter wave exhibited isolation of -20 to -30 dB, and excellent isolation of -39.5 dB was obtained in this work [7][8][9].…”

Implementation of a quadrature hybrid for miniature mixer application

“…Although the deviations can be seen from the simulated and measured results, these results are still promising. Table 1 summarizes the comparisons of the proposed mixer with the reported millimeter-wave PHEMT mixers [7][8][9]. As the results show, the proposed quadrature hybrid in the mixer exhibits a relatively good performance that is suitable for MMIC applications.…”

<title>Coplanar monolithic integrated circuits for low-noise communication and radar systems</title>

“…Various types of 77 GHz coplanar VET mixers have been investigated for use in transceive MMICs [12,13]. It is demonstrated that resistive mixers, where the FET operates in a passive mode, i.e.…”