Steady-State and Transient Thermal Analysis of High-Power Planar Schottky Diodes
Paper in proceedings, 2011

Recent progress in power amplifier technology has made it possible to construct W-band sources which are capable of producing powers in the 1-Watt range. These sources are required in order to build multiplier based local oscillator chains in the frequency range of 2-3 THz. However, it becomes imperative that the multipliers, in particular the initial stage multipliers, be able to withstand the large input power without degrading efficiency or burning out. In this work, we present a systematic study of the steady-state as well as transient thermal behavior of doubler and tripler chips in the 200 GHz range that have been developed at JPL. The Ansys Structural Mechanic software tool has been used to simulate thermal performance of the planar Schottky diodes using a finite-element approach. Experimental verification of the simulation tool is achieved by performing infra-red (IR) thermal imaging on a multiplier chip mounted in a half open waveguide block. The simulation tool is used to explore the various parameters (chip topology, novel materials, cryogenic temperatures etc) and it is concluded that a careful thermal design of the first stage multiplier is necessary in order to produce robust LO chains in the 2-3 THz range. The thermal effects on the multiplier performances will also be discussed.

electro-thermal model

Schottky diode

high power

Author

Aik-Yean Tang

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

Erich Schlecht

Goutam Chattopadhyay

Robert Lin

Choonsup Lee

John Gill

Imran Mehdi

Jan Stake

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

22nd International Symposium on Space Terahertz Technology

Areas of Advance

Information and Communication Technology

Nanoscience and Nanotechnology (2010-2017)

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

Control Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering

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Created

10/6/2017