Modeling of In(0.49)Ga(0.51)P/GaAs Heterojunction Bipolar Transistors for ADC and MMIC Circuit Design
Barlage, Douglas William
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https://hdl.handle.net/2142/81199
Description
Title
Modeling of In(0.49)Ga(0.51)P/GaAs Heterojunction Bipolar Transistors for ADC and MMIC Circuit Design
Author(s)
Barlage, Douglas William
Issue Date
1997
Doctoral Committee Chair(s)
Feng, Milton
Department of Study
Electrical Engineering
Discipline
Electrical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Electronics and Electrical
Language
eng
Abstract
State-of-the-art monolithic Ka-band voltage-controlled oscillators were designed, tested and fabricated. Power output was $>$5 dBm and the phase noise was $<$90 dBc/Hz at 100 kHz. The phase noise and output power are also tested vs. the ambient temperature of the oscillator. Another design is presented that exhibits a tuning range of 2 GHz. The initial design procedure is described in detail. Several monolithic varactors are empirically assessed for their contribution to the phase noise. Preliminary results for coplanar resonator structures are presented. These are presented as a means to enhance the frequency stability of the circuit. Design architectures based on the resonator structure are presented. In addition, to improve the tuning range of the state-of-the-art oscillator, several wave-guide lengths were adjusted. These are included as well.
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