A Ka-band MMIC Oscillator Using a Miniaturized CPW 1-D PBG Structure

Envelope tracking CMOS power amplifier with high-speed CMOS envelope amplifier for mobile handsets

“…Recently, an envelope tracking PA (ET-PA), which can operate in the saturated power region by changing the drain voltage according to the envelope of the modulated RF signal, has been reported to achieve high efficiency. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] An ET-PA based on a III-V semiconductor, which consists of a III-V PA and a CMOS envelope amplifier, has achieved high efficiency, but the reported CMOS ET-PAs have not achieved high efficiency with a sufficient gain and output power. In addition, the reported CMOS ET PAs do not have an integrated driver or transformer in the chip, and they require many external circuits.…”

“…In addition, the reported CMOS ET PAs do not have an integrated driver or transformer in the chip, and they require many external circuits. 10,11) In this paper, we present an integrated CMOS ET-PA operated by a high-speed CMOS envelope amplifier for W-CDMA and LTE application to achieve high efficiency with a sufficient gain and output power.…”

Desenvolvimento de circulador eletromagnético baseado em estruturas periódicas com banda proibida

“…Na comunidade de micro-ondas, uma denotação mais adequada é estrutura EBG [7]. Também foi demonstrado que estruturas EBG podem ser usadas em diferentes aplicações tais como osciladores [8], amplificadores de potência [9], misturadores [10], antenas [11] e circuladores [12].…”