Strategic research on RF and microwave

An introduction to the background, objectives and achievements of the project is given in chapter 1. This is followed by a detailed description of the microwave load pull measurement system in chapter 2. A brief introduction of the load pull concept is made. This is followed by a detailed characteri...

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Main Authors: Ng, Geok Ing, Lau, Wai Shing, Law, Choi Look
Other Authors: School of Electrical and Electronic Engineering
Format: Research Report
Published: 2008
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Online Access:http://hdl.handle.net/10356/2848
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-28482023-03-04T03:19:50Z Strategic research on RF and microwave Ng, Geok Ing Lau, Wai Shing Law, Choi Look School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Antennas, wave guides, microwaves, radar, radio An introduction to the background, objectives and achievements of the project is given in chapter 1. This is followed by a detailed description of the microwave load pull measurement system in chapter 2. A brief introduction of the load pull concept is made. This is followed by a detailed characterization of the load pull system. With this set-up, several AlGaAs/InGaAs pHEMT and HBT devices fabricated at NTU have been measured to evaluate their power performance. The 6X100 // m PHEMT showed power density in excess of 500 mW/mm with a 16 dB gain at 5GHz when biased for maximum power and PAE of 61% under class AB operation at 3.5 V Vds. In the low voltage application this power density is shown to be comparable to state-of-the art performance The 3X15 //m2 self-aligned HBT demonstrated power density in excess of 2.5mW/um2 at 2.5GHz with PAE in excess of 67 % without harmonic tuning. These results are also comparable to existing technologies elsewhere. A large emitter area 160 //m2 HBT also demonstrated power in excess of 500 mW (power density of 3.3 mw//i m2) at 2.5 GHz. 2008-09-17T09:15:33Z 2008-09-17T09:15:33Z 2003 2003 Research Report http://hdl.handle.net/10356/2848 Nanyang Technological University application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
topic DRNTU::Engineering::Electrical and electronic engineering::Antennas, wave guides, microwaves, radar, radio
spellingShingle DRNTU::Engineering::Electrical and electronic engineering::Antennas, wave guides, microwaves, radar, radio
Ng, Geok Ing
Lau, Wai Shing
Law, Choi Look
Strategic research on RF and microwave
description An introduction to the background, objectives and achievements of the project is given in chapter 1. This is followed by a detailed description of the microwave load pull measurement system in chapter 2. A brief introduction of the load pull concept is made. This is followed by a detailed characterization of the load pull system. With this set-up, several AlGaAs/InGaAs pHEMT and HBT devices fabricated at NTU have been measured to evaluate their power performance. The 6X100 // m PHEMT showed power density in excess of 500 mW/mm with a 16 dB gain at 5GHz when biased for maximum power and PAE of 61% under class AB operation at 3.5 V Vds. In the low voltage application this power density is shown to be comparable to state-of-the art performance The 3X15 //m2 self-aligned HBT demonstrated power density in excess of 2.5mW/um2 at 2.5GHz with PAE in excess of 67 % without harmonic tuning. These results are also comparable to existing technologies elsewhere. A large emitter area 160 //m2 HBT also demonstrated power in excess of 500 mW (power density of 3.3 mw//i m2) at 2.5 GHz.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Ng, Geok Ing
Lau, Wai Shing
Law, Choi Look
format Research Report
author Ng, Geok Ing
Lau, Wai Shing
Law, Choi Look
author_sort Ng, Geok Ing
title Strategic research on RF and microwave
title_short Strategic research on RF and microwave
title_full Strategic research on RF and microwave
title_fullStr Strategic research on RF and microwave
title_full_unstemmed Strategic research on RF and microwave
title_sort strategic research on rf and microwave
publishDate 2008
url http://hdl.handle.net/10356/2848
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