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Linearity improvement using a modified derivative superposition method in cascaded stages amplifier

Jian Zhang (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; Herbert Zirath (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; V. Fusco
IET Microwaves, Antennas & Propagation (1751-8725). Vol. 6 (2012), 8, p. 922-928.
[Artikel, refereegranskad vetenskaplig]

A modified derivative superposition (DS) method using cascaded stages transistor is described. It uses the third order intermodulation (IMD3) current generated from the preceding stage to cancel those at the output of the following stage. This analysis demonstrates that an IMD3 minimum occurs near the output power compression point. A balanced X-band linear power amplifier (PA) monolithic microwave integrated circuit (MMIC) using this concept is presented. The results of measurement showed a carrier-to-IMD3 ratio (C/I3) improvement more than 30 dB compared with the conventional cascaded stages configuration.

Denna post skapades 2013-01-21. Senast ändrad 2015-08-10.
CPL Pubid: 171853


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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik



Chalmers infrastruktur