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公开(公告)号：US20160156489A1
公开(公告)日：2016-06-02
申请号：US14956587
申请日：2015-12-02
Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE
Inventor： Ki Jin KIM , Kwang Ho AHAN , Sang Hoon PARK
CPC classification number: H04B1/04 , H04L7/0331 , H04L27/2014 , H04L27/2039 , H04L2027/0016 , H04L2027/0018 , H04L2027/0055 , H04L2027/0091
Abstract: Provided is a lower power and high efficiency millimeter-wave modulation apparatus capable of modulating digital data into transmitting signals in a millimeter frequency band, the millimeter-wave modulation apparatus including; a modulation part, which carries out a modulation of a constant envelope attribute, and to which a first local oscillation signal is fixed according to a rate of input data; a phase shifter adopted to shift a phase of an output of the modulation part; a power amplifier adopted to amplify an output of the phase shifter; and an antenna connected to an output of the power amplifier.
Abstract translation: 提供了一种能够将数字数据调制成毫米波段的发送信号的低功率，高效率的毫米波调制装置，该毫米波调制装置包括： 调制部分，其执行恒定包络属性的调制，并且根据输入数据的速率固定第一本地振荡信号; 移相器，用于移位调制部分的输出相位; 用于放大移相器的输出的功率放大器; 以及连接到功率放大器的输出的天线。
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公开(公告)号：US20170237402A1
公开(公告)日：2017-08-17
申请号：US15391500
申请日：2016-12-27
Applicant: Korea Electronics Technology Institute
Inventor： Ki Jin KIM , Kwang Ho AHAN
CPC classification number: H03F1/223 , H03F1/347 , H03F3/193 , H03F2200/405 , H03F2200/451 , H03F2200/537
Abstract: An RF amplifier to increase a gain using a transformer is provided. The amplifier includes: a first transistor configured to generate a current by amplifying and converting an input voltage; a second transistor configured to amplify the generated current; and a first transformer configured to feed an emitter current of the second transistor back to a gate. Accordingly, Gm of the transistor is boosted using the transformer, such that a high gain can be obtained with a low current. Therefore, a problem of a gain reduction caused by a parasitic capacitor at a high frequency can be solved.
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