Citation

Chaudhary, Muhammad Akmal and Memon, Zulfiqar Ali and Yusoff, Zubaida and Lees, Jonathan and Benedikt, Johannes and Tasker, Paul (2018) Optimization of out-of-band impedance environment for linearity improvements of microwave power transistors. In: 2018 5th International Conference on Electrical and Electronic Engineering (ICEEE), 3-5 May 2018, Istanbul, Turkey.

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Abstract

This paper introduces a novel method that allows the presentation of specific, broadband impedances to a DUT by loadpull. To investigate this method, a derivative of class J power amplifier termed BJ is emulated, which effectively lies between class J and class B along the reactive routes on the Smith chart. The mode helps explore baseband linearization approach and its suitability when using continuous mode architectures. Adopting out-of-band impedance optimization technique allows to present impedances and move progressively from a completely real set of loads to completely imaginary set of loads in a deterministic and systematic way. This further extends a view to look at how well the emulated mode linearizes at a set of BJ contour points along the way. The method uses multiple modulated signal sources, phase synchronized at both radio frequency (RF) and intermediate frequency (IF) to provide a complete multi-harmonic broadband loadpull capability controlled by a single local oscillator and allows complete impedance control at the DUT current generator plane.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	Broadband
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics > TK7871 Electronics--Materials
Divisions:	Faculty of Engineering (FOE)
Depositing User:	Ms Rosnani Abd Wahab
Date Deposited:	30 Mar 2021 19:51
Last Modified:	30 Mar 2021 19:51
URII:	http://shdl.mmu.edu.my/id/eprint/7571

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