Balun

About: Balun is a research topic. Over the lifetime, 5375 publications have been published within this topic receiving 52256 citations. The topic is also known as: Telephone balance unit.

A K-band miniature, broadband, high output power HBT MMIC balanced doubler with integrated balun

Abstract: A K-band frequency doubler using InGaP HBT is developed, which features high fundamental frequency rejection, flat conversion loss over wide bandwidth, and high saturation output power. To obtain a balanced signal, a compact on-chip lumped rat-race hybrid is implemented. The circuit exhibits a measured conversion loss of 4 dB over the output frequencies from 14 to 22 GHz. The fundamental frequency suppression is better than 20 dB and the second harmonic saturation output power is higher than 7.3 dBm with a miniature chip size of 1 mm /spl times/ 1 mm.

A 40-to-76 GHz Balanced Distributed Doubler in 0.13-μm CMOS Technology

Abstract: A miniature 40- to 76-GHz monolithic balanced distributed frequency doubler is developed in a commercial 0.13-mum CMOS process. This balanced doubler consists of a reduced-size broadside-coupled Marchand balun and two distributed doublers, and suppresses fundamental signals better than 25 dB. The measured conversion losses are 8-11 dB for the output frequencies from 40 to 76-GHz under 6-dBm input drive, with a low dc power consumption of 12 mW. The chip size is 0.64 times 0.65 mm2. To the best of our knowledge, this doubler achieves the widest bandwidth among all the CMOS doublers reported to date.

Low-voltage low-noise wideband mixer

Abstract: The invention discloses a low-voltage low-noise wideband mixer, which is provided with a transconductance unit, balun units, a switch unit, a load unit and a buffer unit circuit. The low-voltage low-noise wideband mixer is characterized in that: the transconductance unit adopts a cascode structure consisting of inductors of which gates are connected in series; a single-ended input radio frequencysignal is directly input into the transconductance unit for amplification, and the amplified radio frequency signal is output to the balun unit and converted into a differential radio frequency signal which is output to the switch unit; a local oscillation signal is input into the other balun unit, and the single-ended signal is converted into a differential signal which is output to the switch unit; and the switch unit multiplies the differential local oscillation signal by the differential radio frequency signal to generate a differential intermediate frequency signal, and a single-ended intermediate frequency signal is output after the differential intermediate frequency signal passes through the load unit and the buffer unit circuit.

A 60 GHz wideband high output P1dB up-conversion image rejection mixer in 0.25 µm SiGe technology

Abstract: A high output 1dB compression point 60-GHz up-conversion mixer fabricated on 0.25 µm SiGe∶C technology is presented. It is based on the Gilbert cell and integrated with LO passive stacked Marchand balun to convert the LO single ended signal into differential. It employs tuned load consisting of spiral inductor and MIM capacitor to match the differential output to 100 ohm and to attenuate the image signal by 15 dB in the middle of the band. The conversion gain is 2.2-dB in 61 GHz and varies within 2 dB over 9 GHz band We achieve output 1-dB compression point of −3.4 dBm. To the best of our knowledge it is the highest output 1-dB compression point in silicon-based 60-GHz mixers. It consumes 10 mA from 3.3 V supply

High linearity active balance mixer

Abstract: A low power mixer with improved linearity performance. The mixer includes first and second active baluns coupled to a Schottky diode ring. Each of the active baluns includes a complementary differential Schottky switch driver which enables the Schottky diode ring-quad to be switched with full tail current which provides relatively better linearity performance per dc power consumption than known Schottky diode double balanced mixers with active baluns.