Title

Maintaining two decades of power amplifier bandwidth

Document Type

Article

Publication Date

10-1-2015

Publication Source

Electronics Letters

Volume

51

Issue

20

Inclusive pages

1587-1589

DOI

10.1049/el.2015.2588

Publisher

Institution of Engineering and Technology

ISBN/ISSN

00135194

Peer Reviewed

yes

Abstract

Although several companies are selling MMIC distributed amplifiers with indications of two or more decades of usable bandwidth, the data has been difficult to implement in a practical amplifier design. Suppliers generally make coupling C's and bias tee's an external part of the MMIC measurement system and their losses are often removed (de-embedded) from the published data. Application engineers for even the largest vendors often seem to be unaware of how to practically achieve the bandwidth properties inherent to their devices, which requires simultaneous optimisation of both the high- and the low-frequency response. In this reported work using the axiomatic design approach allows systematically eliminating bandwidth bottlenecks and obtaining greater than two decades of bandwidth in a high-power module. The provided example uses an internally matched GaN distributed MMIC, but the same techniques are useful in many other configurations.

Keywords

Broadband amplifiers, Electronic equipment testing, Frequency response, Power amplifiers, Amplifier bandwidth, Amplifier designs, Axiomatic design, Bandwidth bottlenecks, Distributed amplifier, High power module, Low-frequency response, Measurement system, Bandwidth

Disciplines

Engineering | Systems Engineering

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