Small-signal nonlinear modeling of television IOTs

Author

Sparano, David A.

Author_Institution

Broadcast Commun. Div., Harris Corp., Quincy, IL, USA

Volume

48

Issue

2

fYear

2002

fDate

6/1/2002 12:00:00 AM

Firstpage

81

Lastpage

86

Abstract

The inductive output tube (IOT) is a high power vacuum tube amplifier popularly used in UHF television broadcasting. A small-signal nonlinear model is presented for the IOT. Several simplifying assumptions are made to make the proposed model more tractable mathematically. Component values are then assigned to this simplified model based on measured IOT S₁₁ performance. This model is used to predict IOT intermodulation performance for a unique test case. The results predicted by the proposed model compare favorably to the real world measured results for the same test case.

Keywords

UHF power amplifiers; UHF tubes; equivalent circuits; intermodulation distortion; nonlinear network analysis; television broadcasting; television transmitters; vacuum tubes; IMD; UHF television broadcasting; high power amplifier; high power vacuum tube; inductive output tube; intermodulation distortion; nonlinear distortion; small-signal nonlinear model; television transmission; Distortion measurement; Driver circuits; Mathematical model; Nonlinear distortion; Predictive models; Radio frequency; TV; Testing; UHF measurements; Wideband;

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/TBC.2002.1021271

Filename

1021271