Hwiseob Lee

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  • R B A Boroomandisorkhabi, F B Sadeghzadeh, E Zarrabi, Ghahramani, R M A Rahimi, Z Zarrabi +47 others
  • 2015
The current distribution of the second antenna at 3.7 GHz is presented by Figure 10(f). The simple Slot structure as shown in Figure 2(b) has wide bandwidth, but it is not covering WLAN upper and GSM 1800 so when the ring structure is implemented, the current will distribute on ring and for lower frequencies also as shown in Figure 10(a), the maximum(More)
This paper presents a high-power inverted Doherty power amplifier for broader operational bandwidth. After analyzing two operation modes according to the load modulation of the Doherty power amplifier, the inverted Doherty structure was selected. In the design, the load impedances for optimum broadband characteristics at both the back-off and peak power(More)
— This paper presents a single-ended Class-E power amplifier for wireless power transfer systems. The power amplifier is designed with a low-cost power MOSFET and high-Q inductor. It adopts a second harmonic filter in the output matching network. The proposed Class-E power amplifier has low second harmonic level by the second harmonic filter. Also, we(More)
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