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2011 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications

16-19 Jan. 2011

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  • [CD label]

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  • [Front and back cover]

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  • [CD welcome]

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  • Session list

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  • Table of contents

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  • Brief author index

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  • Detailed author index

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  • The end of indexes

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  • [PDF Reader FAQ and support]

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  • [PDF Reader FAQ and support]

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  • [Title page]

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  • [Copyright notice]

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  • General chairman's invitation to the IEEE Radio and Wireless Week

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  • Technical program chair message

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  • Plenary session

    Publication Year: 2011, Page(s): 1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (121 KB)

    Although cognitive radios has seen an enormous interest from various research communities, arguably even the definition of what it is still not clear. In particular, depending on the person's background the adapted definition varies: For example, RF antenna/reconfigurable hardware community treats it as an upgrade of an software-defined radios (SDR's), PHY/MAC and communication theory researchers ... View full abstract»

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  • Committee

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  • Workshops

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  • A concurrent dual band 870 and 1970 MHz 10 W envelope tracking PA designed by a WCDMA probability distribution conscious approach

    Publication Year: 2011, Page(s):1 - 4
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (982 KB) | HTML iconHTML

    In this paper we propose a novel approach for the design of a concurrent dual-band power amplifier (PA) optimized for envelope tracking (ET) operation. The design was based around the WCDMA probability distribution function and implemented through a multi-section transmission line matching technique. This technique was applied to a concurrent 870 and 1970 MHz ET PA designed around a GaAs HEMT. The... View full abstract»

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  • A 2GHz GaN Class-J power amplifier for base station applications

    Publication Year: 2011, Page(s):5 - 8
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (149 KB) | HTML iconHTML

    The design and implementation of a high efficiency Class-J power amplifier (PA) for base station applications is reported. A commercially available 10 W GaN HEMT device was used, for which a large-signal model and an extrinsic parasitic model were available. Following Class-J theory, the needed harmonic terminations at the output of the transistor were defined and realised. Experimental results sh... View full abstract»

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  • HEMT GaAs/GaN power amplifiers architecture with discrete dynamic voltage bias control in envelope tracking RF transmitter for W-CDMA signals

    Publication Year: 2011, Page(s):9 - 12
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (417 KB) | HTML iconHTML

    A new approach to the average efficiency improvement based on a combined 2-PAs architecture is presented. It uses discrete power control and dynamic supply voltage, which allows enhanced efficiency at low power level. It enables envelope tracking RF transmitter with higher average efficiency than classical approach. At 2.14 GHz CW we got an average efficiency of 42.5%, 6.1% better than the classic... View full abstract»

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  • High efficiency amplifier and signal source module for ISM-band applications

    Publication Year: 2011, Page(s):13 - 16
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (377 KB) | HTML iconHTML

    The use of microwave technology is increasing in cardiac applications for microwave assisted balloon angioplasty and microwave cardiac ablation. Traditional microwave energy sources used in these procedures have poor efficiency and are large in size requiring them to be located far from the patient, and require coaxial cables to deliver power resulting in loss and heat generation causing potential... View full abstract»

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  • Slew-rate limited envelopes for driving envelope tracking amplifiers

    Publication Year: 2011, Page(s):17 - 20
    Cited by:  Papers (5)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (894 KB) | HTML iconHTML

    This paper presents a practical application of a method for generating slew-rate limited envelopes in order to drive the dynamic supply of envelope tracking (ET) power amplifiers (PAs). The proposed method results useful to generate slower versions of the transmitted signal's envelope to cope with the slew-rate and bandwidth limitations of envelope amplifiers. Moreover, this paper shows experiment... View full abstract»

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  • 3.54GHz 10W envelope tracking amplifier with 43% efficiency utilizing the 1.5 bit-high efficiency envelope amplifier

    Publication Year: 2011, Page(s):21 - 24
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB) | HTML iconHTML

    This paper presents a 1.5 bit (3-level) envelope amplifier to improve the overall efficiency of wideband high linearity envelope tracking power amplifier. The proposed envelope amplifier has been devised with two switches providing the different supply voltages. Since the unnecessary current (ripple current) induced by a switching stage can be reduced by the multi-level quantization, the efficienc... View full abstract»

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  • 3.3 ∼ 3.6GHz 28dBm power amplifier for WiMAX CPE applications

    Publication Year: 2011, Page(s):25 - 28
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB) | HTML iconHTML

    This paper presents the design and measurement results of 28dBm power amplifier from 3.3GHz to 3.6GHz for WiMAX CPE (Consumer Premises Equipment) applications. The power amplifier is designed with a 4 stage cascade structure to meet the high gain specification. Moreover, the loadline is designed with 3 section Chebychev LPF matching topology to have the broadband characteristics. All interstage ma... View full abstract»

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