Scale-model design of a submillimeter-wave planar diode mixer

Author

Newman, Tom ; Ng, Kwong T.

Author_Institution

Millitech Corp., South Deerfield, MA, USA

Volume

41

Issue

2

fYear

1992

fDate

4/1/1992 12:00:00 AM

Firstpage

198

Lastpage

202

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 optimum diode geometry, a wide bandwidth transition from circular waveguide to shielded microstrip, a DC return bondwire, and 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

Keywords

mixers (circuits); semiconductor device models; semiconductor diodes; solid-state microwave devices; strip line components; submillimetre wave devices; 345 GHz; DC return bondwire; bandwidth transition; circular waveguide; diode terminals; microstrip low-pass filter; network analyzer; optimum diode geometry; optimum impedance; scale models; shielded microstrip; submillimeter-wave planar diode mixer; Bandwidth; Bonding; Diodes; Geometry; Impedance measurement; Low pass filters; Microstrip filters; Process design; Solid modeling; Waveguide transitions;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.137347

Filename

137347