A comparison of polar transmitter architectures using a GaN HEMT power amplifier
Cijvat, Pieternella LU ; Tom, Kevin ; Faulkner, Mike and Sjöland, Henrik LU
(2008)
The 15th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2008
- Abstract
- In this paper three transmitter architectures are compared, that each use the low-frequency envelope and high-frequency phase component of an RF signal. A power amplifier (PA) with Pulse Width Modulation by Variable Gate Bias (PWMVGB) is compared to an Envelope Elimination and Restoration (EER) and Envelope Tracking (ET) configuration. The test circuit is implemented using a discrete GaN HEMT power amplifier and discrete surface-mount passive components assembled on a PCB. Measurements show that the EER architecture maintains a drain efficiency of 56 to 69% for a wide output power range, while the PA with variable gate bias shows a significant drop in efficiency for lower output powers (from 59 to 6%). Other comparison issues are... (More)
- In this paper three transmitter architectures are compared, that each use the low-frequency envelope and high-frequency phase component of an RF signal. A power amplifier (PA) with Pulse Width Modulation by Variable Gate Bias (PWMVGB) is compared to an Envelope Elimination and Restoration (EER) and Envelope Tracking (ET) configuration. The test circuit is implemented using a discrete GaN HEMT power amplifier and discrete surface-mount passive components assembled on a PCB. Measurements show that the EER architecture maintains a drain efficiency of 56 to 69% for a wide output power range, while the PA with variable gate bias shows a significant drop in efficiency for lower output powers (from 59 to 6%). Other comparison issues are modulation of the supply voltage and transmitter complexity. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1264718
- author
- Cijvat, Pieternella
LU
; Tom, Kevin
; Faulkner, Mike
and Sjöland, Henrik
LU
- organization
- publishing date
- 2008
- type
- Contribution to conference
- publication status
- published
- subject
- keywords
- polar transmitter, wireless communication, power amplifier
- pages
- 4 pages
- conference name
- The 15th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2008
- conference location
- Malta
- conference dates
- 2008-08-31 - 2008-09-03
- external identifiers
-
- scopus:57849120838
- language
- English
- LU publication?
- yes
- id
- 37934438-fbd0-4569-ab30-f697c2be0fd5 (old id 1264718)
- date added to LUP
- 2016-04-04 14:00:32
- date last changed
- 2024-01-13 10:43:29
@misc{37934438-fbd0-4569-ab30-f697c2be0fd5,
abstract = {{In this paper three transmitter architectures are compared, that each use the low-frequency envelope and high-frequency phase component of an RF signal. A power amplifier (PA) with Pulse Width Modulation by Variable Gate Bias (PWMVGB) is compared to an Envelope Elimination and Restoration (EER) and Envelope Tracking (ET) configuration. The test circuit is implemented using a discrete GaN HEMT power amplifier and discrete surface-mount passive components assembled on a PCB. Measurements show that the EER architecture maintains a drain efficiency of 56 to 69% for a wide output power range, while the PA with variable gate bias shows a significant drop in efficiency for lower output powers (from 59 to 6%). Other comparison issues are modulation of the supply voltage and transmitter complexity.}},
author = {{Cijvat, Pieternella and Tom, Kevin and Faulkner, Mike and Sjöland, Henrik}},
keywords = {{polar transmitter; wireless communication; power amplifier}},
language = {{eng}},
title = {{A comparison of polar transmitter architectures using a GaN HEMT power amplifier}},
year = {{2008}},
}