Title :
Electrothermal modeling and measurement for spatial power combining at millimeter wavelengths
Author :
Batty, William ; Panks, Andrew J ; Johnson, Robert G. ; Snowden, Christopher M.
Author_Institution :
Inst. of Microwaves & Photonics, Leeds Univ., UK
fDate :
12/1/1999 12:00:00 AM
Abstract :
In this paper, the first completely physical coupled electrothermal model, suitable for large-signal simulation of MESFET- and HEMT-based MMIC´s and MMIC arrays, on a timescale suitable for computer-aided design, is presented. The model is validated experimentally by high-resolution thermal imaging of a MMIC 38-GHz three-stage balanced amplifier, mounted on a Cu/FR-4 substrate and cooled entirely by natural convection and radiation into free space
Keywords :
HEMT integrated circuits; MESFET integrated circuits; MMIC power amplifiers; arrays; circuit simulation; differential amplifiers; field effect MIMIC; millimetre wave power amplifiers; power combiners; thermal management (packaging); thermal resistance; 38 GHz; Cu/FR-4 substrate; HEMT-based MMIC; MESFET-based MMIC; MMIC arrays; MMIC three-stage balanced amplifier; computer-aided design; free space radiation; global thermal description; high-resolution thermal imaging; large-signal simulation; millimeter wavelengths; natural convection; physical coupled electrothermal model; spatial power combining; thermal-resistance matrix; Electrothermal effects; Frequency; High power amplifiers; MESFETs; MMICs; Millimeter wave measurements; Millimeter wave radar; Power measurement; Thermal management; Wavelength measurement;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
