Title :
On the frequency response symmetry of diode mixers
Author :
Moulthrop, Andrew A. ; Muha, Michael S. ; Silva, Christopher P.
Author_Institution :
Aerosp. Corp., Los Angeles, CA, USA
Abstract :
A mixing process is symmetrical when the conversion loss and group delay are equal between a downconversion and the corresponding upconversion. It is shown here by measurement that diode mixers have some degree of response asymmetry. Simulations show that the response asymmetry is caused by the voltage-variable junction capacitance of the mixer diodes. The response asymmetry sets a limit on the accuracy of three-mixer and other techniques to derive the frequency response of individual mixers.
Keywords :
equivalent circuits; frequency response; microwave mixers; semiconductor diodes; conversion loss; diode mixer; frequency response symmetry; group delay; mixer diode; mixer measurement; mixer modeling; mixing process; voltage-variable junction capacitance; Capacitance; Delay; Equations; Frequency response; Measurement techniques; Microwave measurements; Mixers; Schottky diodes; Time measurement; Voltage; Frequency response symmetry; mixer; mixer diode; mixer measurement; mixer modeling; reciprocity;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2005.858105
