Broadband Active Mixer Based on the Hilbert Cell with Built-In Symmetric Devices in the Silicon-Germanium Technological Process 250 Nm

Abstract

In this article, topological features and results of measurements of a two-balanced active mixer with integrated balancing devices are considered. The mixer core is realized on a Gilbert cell using heterojunction bipolar transistors (HBT), made in Si-Ge BiCMOS technology at 0.25 µm, The measured characteristics of the mixer in the 0.9-16 GHz band are as follows: the GC conversion gain is more than 7.5 dB. The isolation of the LO signal penetration into the radio frequency signal is about 43 dB, the RF-IF and LO-IF isolation is 21 … 23 dB, area 1 mm2.