Abstract
This paper presents a new topology of a diodebased Sub-harmonically pumped resistive mixer (SHPRM)
for millimeter waves with a focus on free band available
around 60 GHz. In this topology, a local oscillator (LO) of
quarter of the frequency is needed in comparison to the
fundamental mixer (e.g., 14 in place of 56 GHz). The band
of operation of the mixer for RF is 57-59 GHz, for IF is 1-3
GHz and LO is at 14GHz. Because of reduction in the
required LO frequency, there is a momentous decrease in
complexity of the overall radio front-end. This saves the dc
power consumption and the area required for the chip. In
this way, for a high-frequency system, the Subharmonic
mixer renders a substantial reduction in cost. The mixer is
implemented in microstrip technology using Rogers
substrate which was fully characterized via full-wave EM
simulations. The working principle of the Subharmonic
mixer is demonstrated used in a millimeter-wave system.
Here main design parameters were the conversion loss and
isolation between all the three ports. Hence the overall
design objective was to produce a low cost and low loss
scheme, having excellent isolation while keeping it simple
Muhammad Qamar Shafique, Dr. Inam Elahi Rana. (2015) Design of a Low-Cost High Isolation Subharmonic Mixer in mm-waves using Schottky Diodes, Journal of Space Technology , Volume 5, Issue 1.
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