Effect of Self-Heating on Terahertz Double Avalanche Region Transit Time Source. Issue 1 (2nd January 2020)

• Record Type: Journal Article
• Authors: Mukhopadhyay, S. J.; Acharyya, Aritra; Mitra, M.
• Is Part Of: IETE journal of education. Volume 61:Issue 1(2020)
• Page Start: 16
• Page End: 24
• Publication Date: 2020-01-02
• Subjects: Double avalanche region -- Linear temperature coefficient -- Quadratic temperature coefficient -- Multiple-band operation -- Millimeter-wave -- Terahertz; Electrical engineering -- Periodicals; Electronics -- Periodicals; Electrical engineering; Electronics; Periodicals; 621.381
• DOI: 10.1080/09747338.2020.1760739
• Languages: English
• ISSNs: 0970-1664

Abstract

Abstract : This paper highlights the effect of temperature on the high-frequency performance of the double avalanche region avalanche transit time (ATT) source capable of operating in multiple numbers of frequency bands. The variance of static (DC) and large-signal properties on temperature are accounted by utilizing a well-established authors' developed simulation method. The large-signal admittance characteristics of the source show the presence of discrete and far separated negative conductance bands which can yield a wide tuning capability of it. Here in this paper, linear changes of DC parameters as well as non-linear changes of large-signal parameters with junction temperature have been studied; with the help of utilizing linear and quadratic polynomial curve fitting method, analytical expressions are obtained which represent the DC and high-frequency parameters of the source as functions of junction temperature. These will be very much beneficial for optimization of thermal design-related issues of the ATT sources.