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
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[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 which...
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