W-band IQ sub-harmonic mixers with low LO power for cryogenic operation in large arrays
European Microwave Integrated Circuit Conference(2014)
Abstract
This paper presents the design and characterization of W-band IQ sub-harmonic MMIC mixers based on the UMS BES Schottky diode process. The mixers were characterized at 300 K and 20 K physical temperature. They are a key component for the compact heterodyne multi-chip modules to be used in the 16-element Argus focal plane array, which will be deployed at the Green Bank Telescope in late 2014. The RF signal is split in quadrature using a Lange coupler, LO is split in-phase using a Wilkinson divider, and an antiparallel diode pair is used for the design of two sub-harmonically pumped mixer cells. The resulting IF outputs from the two cells are I and Q, which can be combined using an off-chip 90 degree hybrid to obtain LSB and USB. Three mixer designs are fabricated using this topology. A conversion loss between 12 to 18 dB is obtained over 80 to 120 GHz of RF for a fixed IF frequency, and over 10 GHz of IF for a fixed LO frequency. These mixers are designed to operate with low LO power without a significant loss in performance.
MoreTranslated text
Key words
mmic mixers,schottky diode mixers,cryogenic electronics,focal planes,harmonic oscillators (circuits),losses,low-power electronics,millimetre wave mixers,multichip modules,telescopes,16-element argus focal plane array,lsb,lange coupler,rf signal,ums bes schottky diode process,usb,w-band iq subharmonic mmic mixers,wilkinson divider,antiparallel diode pair,compact heterodyne multichip modules,conversion loss,cryogenic operation,fixed if frequency,fixed lo frequency,green bank telescope,large arrays,local oscillator,loss 12 db to 18 db,low lo power,off-chip 90 degree hybrid,physical temperature,subharmonically pumped mixer cells,temperature 20 k,temperature 300 k
AI Read Science
Must-Reading Tree
Example
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
Generate MRT to find the research sequence of this paper
Chat Paper
Summary is being generated by the instructions you defined