An experimental study of a balanced mixer based on 2A116A-1 diodes was carried out.Conversion losses were measured in the input frequency range 2450 ± 45 MHz during downconversion to an intermediate 2125 MHz. Conversion loss does not exceed 20 dB anarrow band 2440±10 The amplitude characteristic taken, from which itcan be seen that it is linear for signals up 0 dBm (1 mW). dependence conversion...

This paper describes a 2 GHz CMOS active balanced downconversion I/Q mixer in a TSMC0.18m process for a WCDMA receiver. The mixer achieves a conversion gain of 16 dB and a double side band (DSB) NF of 13.8 dB. The mixer's IIP3 is 12.12 dBm. It consumes approximately 5 mA of current from a 1.8-V power supply. The 12.12 dBm IIP3 fulfils the UMTS requirements for a mixer design.

This paper describes a 1.5-V 5 GHz I/Q down conversion mixer in a 0.18-μm CMOS process. The mixer achieves a conversion gain of 12.7 dB within 1-dB compression point (iCP1dB) of -15.83 dBm. It also achieves a double side band (DSB) NF of 13.5 dB. The mixer's IIP3 is -5.94 dBm. The mixer consumes only 5.72 mA of current from a 1.5-V power supply. Key-Words: Analog RF-CMOS, IEEE 802.11a, IEEE 802...

This paper demonstrates a small compact 5.7 GHz upconversion Gilbert micromixer using 0.35 m SiGe HBT technology. A micromixer has a broadband matched single-ended input port. A passive LC current combiner is used to convert micromixer differential output into a singleended output and doubles the output current for singleended-input and single-ended-output applications. Thus, a truly balanced o...

We present a new analog circuit exhibiting high bandwidth and low distortion, specially designed for signal correlation in an ultrawideband receiver front end. The ultra-wideband short impulse signals are correlated with a local pulse template by the correlator. A comparator then samples the output for signal detection. A typical Gilbert mixer core is adopted formultiplication of broadband sign...

This paper presents an 8-18GHz wideband receiver with superheterodyne topology. In order to save power, both RF and IF signals share the tunable transconductance stage. The IF output of the first mixer is fed to its tunable input stage for IF amplification in a recursive manner, which significantly enhances the gain tuning without increasing the power. The wideband receiver MMIC is implemented ...

Abstract This paper describes a new switching topology of a sampling mixer for SAW-less GPS (L1 band) receivers. The GPS receiver with the new mixer achieved NF 2.5dB and good blocking performance. In an alternative implementation, the mixer is stacked under a Quadrature VCO to reuse supply current. As a result, the current consumption of the GPS receiver is 11mA from 1.8V supply while maintain...

A linearity improvement technique for a common-source transconductance stage is proposed. The proposed technique requires an additional MIM capacitor located in parallel with the intrinsic gate-source capacitor of a transistor. The origin of the linearity improvement is explained and the proposed technique is applied to a down-conversion mixer. From the simulation, the down-conversion mixer tha...

The impedance of the superconducting hot-electron bolometer mixer was measured in the range 0.2-4 GHz. A special technique relying on determination of the Sz, transmission parameter of the device was used. Many advantages of the technique (wide frequency range, in situ calibration, low test power, accuracy) are demonstrated. The estimate of the mixer bandwidth from the impedance data using the ...