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Integrated doherty type amplifier arrangement with high power efficiency

A multi-amplifier and multi-integration technology, which is applied to the components of the amplifying device, amplifiers, improved amplifiers to improve efficiency, etc., can solve problems such as unresolved mutual coupling

Inactive Publication Date: 2009-09-16
AMPLEON NETHERLANDS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, the aforementioned documents do not address the aforementioned problems arising from the mutual coupling in the Doherty amplifier arrangement due to the variable input impedance and variable output loading of the main and peak amplifiers

Method used

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  • Integrated doherty type amplifier arrangement with high power efficiency
  • Integrated doherty type amplifier arrangement with high power efficiency
  • Integrated doherty type amplifier arrangement with high power efficiency

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Embodiment Construction

[0032] The preferred embodiment will now be described in connection with MMIC (Monolithic Microwave Integrated Circuit) technology that can be used in transceiver design for wireless systems or any other radio frequency (RF) system. The application of this MMIC technology enables shrinking microwave and millimeter wave systems with improved performance.

[0033] In mobile RF transceivers in emerging wireless systems such as in WCDMA, CDMA2000 or Wireless Local Area Network (WLAN) systems according to IEEE802.11(a) / (g) standards, a power amplifier is used at the transmitter level where the modulated The RF signal is amplified before it is supplied to the antenna for wireless transmission. These power amplifiers are the most power consuming parts of these RF transceivers. A high efficiency power amplifier can be provided using a Doherty type amplifier arrangement.

[0034] A Doherty structure is used in the power amplifier device according to this preferred embodiment, in whic...

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Abstract

The present invention relates to an integrated Doherty type amplifier arrangement and an amplifying method for such an arrangement, wherein a lumped element hybrid power divider (12) is provided for splitting input signals of main and peak amplifier stages (20, 30, 40) at predetermined phase shifts and non-equal division rates and at least one wideband lumped element artificial line (Z 1, Z2) combined with wideband compensation circuit for receiving said first amplified signal and for applying said predetermined phase shift to said first amplified signal and its higher harmonics. Thereby, the low gain of the peak amplifier is compensated by providing the non-equal power splitting at the input. Moreover, the use of the lumped element hybrid power divider leads to an improved isolation between the input ports of the main and peak amplifiers decreasing final distortions of the output signal.

Description

technical field [0001] The invention relates to an integrated Doherty-type amplifier and a method for amplifying an input signal of such a Doherty-type amplifier arrangement. Background technique [0002] In recent years, there has been a strong need to improve the efficiency of power amplifiers used for wireless communications. The application of the Doherty technique is able to maintain the efficiency of the power amplifier over a wide range of input power variations. W.H.Doherty first proposed the Doherty amplifier in 1936 and discussed it in a technical paper entitled "A New High Efficiency Power Amplifier For Modulated Waves", Proceedings of the Institute of RadioEngineers, Vol.24 , No. 29, September 1936. Originally envisioned for use in low to mid frequency amplitude modulated broadcast transmitters, the proposed scheme can be modified and updated to increase the efficiency of high frequency power amplifiers. [0003] In conventional amplifiers, there is a direct r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/07
CPCH01L2924/14H01L2924/19104H01L2924/1423H01L2924/1305H03F2200/198H03F1/0288H01L2924/01055H03F2200/225H01L2924/19041H01L2924/3011H01L2224/4813H01L2924/30107H01L2924/00
Inventor I·布勒德诺夫
Owner AMPLEON NETHERLANDS
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