Scale-model design of a submillimeter-wave planar diode mixer
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 model measurements were used to find (1) optimum diode geometry, (2) a wide bandwidth transition from circular waveguide to shielded microstrip, (3) a dc return bondwire, and (4) a microstrip low-pass filter. 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 scale model design procedure. Design information presented on the different components will be useful for developing future planar diode mixers.
- Publication:
-
IEEE Transactions on Instrumentation Measurement
- Pub Date:
- April 1992
- DOI:
- 10.1109/19.137347
- Bibcode:
- 1992ITIM...41..198N
- Keywords:
-
- Circular Waveguides;
- Diodes;
- Low Pass Filters;
- Microstrip Devices;
- Mixing Circuits;
- Submillimeter Waves;
- Gallium Arsenides;
- Impedance;
- Inductance;
- Scale Models;
- Schottky Diodes;
- Electronics and Electrical Engineering