A 500 °C Active Down-Conversion Mixer in Silicon Carbide Bipolar Technology
This letter presents an active down-conversion mixer for high-temperature communication receivers. The mixer is based on an in-house developed 4H-SiC BJT and down-converts a narrow-band RF input signal centered around 59 MHz to an intermediate frequency of 500 kHz. Measurements show that the mixer o...
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Published in | IEEE electron device letters Vol. 39; no. 6; pp. 855 - 858 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
IEEE
01.06.2018
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Subjects | |
Online Access | Get full text |
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Summary: | This letter presents an active down-conversion mixer for high-temperature communication receivers. The mixer is based on an in-house developed 4H-SiC BJT and down-converts a narrow-band RF input signal centered around 59 MHz to an intermediate frequency of 500 kHz. Measurements show that the mixer operates from room temperature up to 500 °C. The conversion gain is 15 dB at 25 °C, which decreases to 4.7 dB at 500 °C. The input 1-dB compression point is 1 dBm at 25 °C and −2.5 dBm at 500 °C. The mixer is biased with a collector current of 10 mA from a 20 V supply and has a maximum DC power consumption of 204 mW. High-temperature reliability evaluation of the mixer shows a conversion gain degradation of 1.4 dB after 3-hours of continuous operation at 500 °C. |
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ISSN: | 0741-3106 1558-0563 1558-0563 |
DOI: | 10.1109/LED.2018.2829628 |