http://iet.metastore.ingenta.com
1887

## High-efficiency Doherty power amplifiers

• Author(s):
• DOI:

$16.00 (plus tax if applicable) ##### Buy Knowledge Pack 10 chapters for$120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Name:*
Email:*
Name:*
Email:*
Department:*
Why are you recommending this title?
Select reason:

Radio Frequency and Microwave Power Amplifiers. Volume 2: Efficiency and Linearity Enhancement Techniques — Recommend this title to your library

## Thank you

Your recommendation has been sent to your librarian.

This chapter discusses the power amplifier technique for amplitude-modulated (AM) radio-frequency signals was invented by William H. Doherty in broadcasting in the mid-1930s as a more efficient alternative to both conventional amplitude-modulation techniques and Chireix outphasing [4]. The amplifier was configured in a grounded-cathode structure where two vacuum tubes were connected in parallel, one as a Class B carrier tube and the other as a Class C peaking tube, and the tubes were split and combined through þ90° and -90° phase shifting networks. This novel power amplifier architecture removed limitation of low efficiency inherent in a conventional power amplifier circuit, permitting efficiencies of 60% to 65% to be realized, while retaining the principal advantages associated with low-level modulations systems and linear power amplifiers.

Chapter Contents:

• 2.1 Basic Doherty amplifier structure
• 2.2 Asymmetric Doherty amplifiers
• 2.3 Multistage Doherty amplifiers
• 2.4 Inverted Doherty amplifiers
• 2.5 Integrated Doherty amplifiers
• 2.6 Broadband Doherty amplifiers
• References

Inspec keywords:

Preview this chapter:

High-efficiency Doherty power amplifiers, Page 1 of 2

| /docserver/preview/fulltext/books/cs/pbcs071g/PBCS071G_ch2-1.gif /docserver/preview/fulltext/books/cs/pbcs071g/PBCS071G_ch2-2.gif

### Related content

content/books/10.1049/pbcs071g_ch2
pub_keyword,iet_inspecKeyword,pub_concept
6
6
This is a required field