0.18‐μm CMOS wideband passive mixer

Abstract

A 0.18‐μm CMOS wideband passive mixer fully integrated with baluns in IBM7HP process is reported. The mixer exhibits wideband operation, despite the intrinsic narrow‐band magnitude balance of passive baluns. Very low DC offset, of less than 3 mV, is achieved without any DC cancellation circuits, due to high LO–RF isolation. At the RF frequency of 2.4 GHz, the combined IF differential outputs provide conversion loss (CL) of 7.5 dB, input 1 dB compression point (IP1dB) of 6.2 dBm, and input third‐order intercept point (IIP3) of 15.5 dBm. This mixer exhibits broad‐band RF impedance matching with reflection coefficient magnitude better than −9.6 dB through the RF frequency range from 1 to 12 GHz. The CL of 10.1–12.9 dB, IP1dB of 8.6–14.4 dBm, and IIP3 of 16–22.2 dBm are achieved at this frequency range for broad‐band applications. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:23–27, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27226

A SiGe BiCMOS double-balanced mixer with active balun for X-band Doppler radar

“…Active Balun for X-Band Doppler Radar Rasmus S. Michaelsen (1,2) , Tom K. Johansen (1) , Kjeld M. Tamborg (2) , and Vitaliy Zhurbenko (1) (1) Technical University of Denmark, Department of Electrical EngineeringINTRODUCTION High precision Doppler radars can be used for a high number of applications ranging from vital signs detection, tracking of aircrafts, UAVs, satellites, and space-shuttles to velocity tracking radars for artillery. The requirements to the dynamic range in the Doppler radar receivers continue to evolve as new applications emerge.…”

“…It is well-known that direct conversion mixers suffers from DC offset problems and high 1/f-noise [1]. This has led to research into passive doublebalanced mixers using either CMOS resistive mixers [2] or diode-ring mixers [3]. In a SiGe BiCMOS technology, the 1/fnoise properties are believed to be best for the bipolar transistors compared to the MOSFETs.…”

A 24 GHz integrated SiGe BiCMOS vital signs detection radar front-end

“…This means that the same mixer structure can be used for the transmit and receive path. Using a passive FET resistive topology also reduces 1/f-noise compared to topologies with a DC biasing current [6]. The 1/f-noise in the receiver mixers remains problematic even in the low-IF heterodyne architecture.…”

Design and simulation of novel amplifier‐based mixer for ISM band wireless applications

“…Mixer is one of the most important analog blocks in the wireless communication system. Typically, the Gilbert active mixers [1][2][3][4][5][6][7][8][9][10] are widely used in the wireless communication systems for their superior conversion gain and port to port isolation. However, conventional Gilbert active mixers generally consume a significant portion of the power of the transceiver, and the LV-LP mixers have received considerable attentions in recent years.…”