Title :
Instrumentation and measurement for a submillimeter-wave planar diode mixer
Author :
Newman, Tom ; Ng, Kwong T.
Author_Institution :
Dept. of Electr. Eng., Virginia Univ., Charlottesville, VA, USA
Abstract :
The design of a planar diode submillimeter-wave mixer is presented in which scale models play an important role. By constructing larger scale models of mixer components the design process is simplified by making component changes easier and by making the measurements easier with the aid of a network analyzer. Separate scale models were used to find: optimum diode geometry; a microstrip low-pass filter; and a wide-bandwidth transition from circular waveguide to shielded microstrip. After combining the results from these measurements to form a mixer circuit model, the combined effect of the various components was studied and adjustments were made to present an optimum impedance to the diode terminals. Tests of the design at 345 GHz confirm the accuracy of the design procedure
Keywords :
mixers (circuits); network analysers; semiconductor device models; solid-state microwave circuits; strip line components; submillimetre wave devices; 345 GHz; circular waveguide; diode terminals; large scale models; microstrip low-pass filter; mixer circuit model; network analyzer; optimum diode geometry; optimum impedance; scale models; shielded microstrip; submillimeter-wave planar diode mixer; wide-bandwidth transition; Diodes; Geometry; Impedance measurement; Instrumentation and measurement; Low pass filters; Microstrip filters; Process design; Solid modeling; Submillimeter wave measurements; Waveguide transitions;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1991. IMTC-91. Conference Record., 8th IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-87942-579-2
DOI :
10.1109/IMTC.1991.161563
