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A new balanced diode mixer for use in microstrip techniques is presented. Measurements show an LO to RF isolation of −25 dB, a noise figure and conversion loss of about 6dB over a frequency range of 7.5 to 12.5 GHz.
Knöchel, R., Mayer, B., Goebel, U.: `Unilateral microstrip balanced and doubly balanced mixers', IEEE 1989 MTT-S International Microwave Symposium Digest, p. 1247–1250.
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Mayer, B., Knöchel, R.: `Biasable balanced mixers and frequency doublers using a new planar balun', Proc. 20th European Microwave Conference, Budapest.