Patents by Inventor Kaizhan Wang
Kaizhan Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11193902Abstract: The disclosure provides a method for measuring the transverse thermal conductivity of a thin film. The method comprises the steps of measuring the longitudinal thermal conductivity of a thin film to be measured by using a 3? method and by taking a second metal strip deposited on the surface of the thin film to be measured as a heating source at first; measuring the temperature rise of the thin film to be measured in the longitudinal direction by using the 3? method, and deducing the thermal power of the thin film to be measured in the longitudinal direction; and finally, calculating the transverse thermal conductivity of the thin film to be measured. By adopting a ‘substrate/thin film to be measured/metal strip’ sample structure, the process difficulty of preparing a suspension structure sample can be effectively avoided.Type: GrantFiled: September 15, 2017Date of Patent: December 7, 2021Assignee: WUHAN JOULE YACHT SCIENCE & TECHNOLOGY CO., LTD.Inventors: Xiangshui Miao, Hao Tong, Kaizhan Wang, Yuanbing Wang, Lingjun Zhou, Yingrui Cai
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Publication number: 20210280529Abstract: Embodiments of this application disclose a package structure and a communications device to which the package structure is applied. The package structure includes a substrate, a die, and a bonding layer configured to bond the die to the substrate. Charged particles are disposed in the bonding layer. An electrode is disposed on a surface of the die away from the bonding layer. A potential of the electrode is opposite to that of the charged particle. The package structure further includes a first shielding structure. A potential of the substrate is zero. The first shielding structure is located on an outer surface of the die and is located between the bonding layer and the electrode, to prevent the charged particles from migrating to the electrode.Type: ApplicationFiled: May 25, 2021Publication date: September 9, 2021Inventors: Zhihua Zhao, Mengyi Cao, Kaizhan Wang
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Publication number: 20210109047Abstract: The disclosure provides a method for measuring the transverse thermal conductivity of a thin film. The method comprises the steps of measuring the longitudinal thermal conductivity of a thin film to be measured by using a 3? method and by taking a second metal strip deposited on the surface of the thin film to be measured as a heating source at first; measuring the temperature rise of the thin film to be measured in the longitudinal direction by using the 3? method, and deducing the thermal power of the thin film to be measured in the longitudinal direction; and finally, calculating the transverse thermal conductivity of the thin film to be measured. By adopting a ‘substrate/thin film to be measured/metal strip’ sample structure, the process difficulty of preparing a suspension structure sample can be effectively avoided.Type: ApplicationFiled: September 15, 2017Publication date: April 15, 2021Applicant: WUHAN JOULE YACHT SCIENCE & TECHNOLOGY CO.,LTD.Inventors: Xiangshui MIAO, Hao TONG, Kaizhan WANG, Yuanbing WANG, Lingjun ZHOU, Yingrui CAI
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Patent number: 10879857Abstract: Embodiments of the present invention provide a power amplifier, a radio remote unit RRU, and a base station. A multiphase pulse width modulator performs modulation to generate N multiphase pulse-width modulation PWM signals. The multiphase pulse-width modulation PWMn signal may be amplified. The multiphase pulse-width modulation PWMn signal may be filtered and a combination may be performed at a drain or a collector of a power amplifier transistor. According to the new radio frequency amplifier in accordance with the disclosure, envelope feeding loop inductance can be effectively reduced, so that video bandwidth is increased and DPD correction performance is improved.Type: GrantFiled: September 27, 2016Date of Patent: December 29, 2020Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Zhonghua Cai, Lipeng Zhang, Kaizhan Wang, Zhiyuan Pang, Sheng Zhu
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Patent number: 10673384Abstract: A power amplifier, a radio remote unit (RRU), and a base station, where the power amplifier includes an envelope controller, a main power amplifier, and an auxiliary power amplifier. The main power amplifier and the auxiliary power amplifier both set an envelope voltage output by the envelope modulator as operating voltages, and because the operating voltages of the main power amplifier and the auxiliary power amplifier may be adjusted simultaneously, symmetry of the power amplifier is improved, and an efficiency loss occurring probability is low, thereby enhancing efficiency of the power amplifier.Type: GrantFiled: February 25, 2019Date of Patent: June 2, 2020Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Lipeng Zhang, Zhonghua Cai, Ting Li, Kaizhan Wang
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Patent number: 10511266Abstract: A power amplifier control method is disclosed. A phase modulation control signal may be generated according to an envelope signal that is output by a baseband unit. The phase modulation may be performed on a signal of a main power amplifier link and/or an auxiliary power amplifier link in the Doherty power amplifier circuit according to the phase modulation control signal, so that a phase difference between the signal of the main power amplifier link and the signal of the auxiliary power amplifier link after the phase modulation is a specified value corresponding to a current value of the envelope signal, where the specified value is an optimal phase value of a Doherty power amplifier circuit when the supply voltage of the Doherty power amplifier circuit is an envelope voltage corresponding to the current value of the envelope signal. High-efficiency power amplifier technology is realized.Type: GrantFiled: June 22, 2018Date of Patent: December 17, 2019Assignee: HUAWEI TECHNOLOGLES CO., LTD.Inventors: Lipeng Zhang, Zhonghua Cai, Kaizhan Wang, Wei Jiao, Zhiyuan Pang, Sheng Zhu
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Publication number: 20190341894Abstract: Embodiments of the present invention provide a power amplifier, a radio remote unit RRU, and a base station. A multiphase pulse width modulator performs modulation to generate N multiphase pulse-width modulation PWM signals. The multiphase pulse-width modulation PWMn signal may be amplified. The multiphase pulse-width modulation PWMn signal may be filtered and a combination may be performed at a drain or a collector of a power amplifier transistor. According to the new radio frequency amplifier in accordance with the disclosure, envelope feeding loop inductance can be effectively reduced, so that video bandwidth is increased and DPD correction performance is improved.Type: ApplicationFiled: September 27, 2016Publication date: November 7, 2019Inventors: Zhonghua CAI, Lipeng ZHANG, Kaizhan WANG, Zhiyuan PANG, Sheng ZHU
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Publication number: 20190190458Abstract: A power amplifier, a radio remote unit (RRU), and a base station, where the power amplifier includes an envelope controller, a main power amplifier, and an auxiliary power amplifier. The main power amplifier and the auxiliary power amplifier both set an envelope voltage output by the envelope modulator as operating voltages, and because the operating voltages of the main power amplifier and the auxiliary power amplifier may be adjusted simultaneously, symmetry of the power amplifier is improved, and an efficiency loss occurring probability is low, thereby enhancing efficiency of the power amplifier.Type: ApplicationFiled: February 25, 2019Publication date: June 20, 2019Inventors: Lipeng Zhang, Zhonghua Cai, Ting Li, Kaizhan Wang
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Patent number: 10230333Abstract: A power amplifier, a radio remote unit (RRU), and a base station, where the power amplifier includes an envelope controller, a main power amplifier, and an auxiliary power amplifier. The main power amplifier and the auxiliary power amplifier both set an envelope voltage output by the envelope modulator as operating voltages, and because the operating voltages of the main power amplifier and the auxiliary power amplifier may be adjusted simultaneously, symmetry of the power amplifier is improved, and an efficiency loss occurring probability is low, thereby enhancing efficiency of the power amplifier.Type: GrantFiled: February 5, 2018Date of Patent: March 12, 2019Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Lipeng Zhang, Zhonghua Cai, Ting Li, Kaizhan Wang
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Publication number: 20180302042Abstract: A power amplifier control method is disclosed. A phase modulation control signal may be generated according to an envelope signal that is output by a baseband unit. The phase modulation may be performed on a signal of a main power amplifier link and/or an auxiliary power amplifier link in the Doherty power amplifier circuit according to the phase modulation control signal, so that a phase difference between the signal of the main power amplifier link and the signal of the auxiliary power amplifier link after the phase modulation is a specified value corresponding to a current value of the envelope signal, where the specified value is an optimal phase value of a Doherty power amplifier circuit when the supply voltage of the Doherty power amplifier circuit is an envelope voltage corresponding to the current value of the envelope signal. High-efficiency power amplifier technology is realized.Type: ApplicationFiled: June 22, 2018Publication date: October 18, 2018Inventors: Lipeng Zhang, Zhonghua Cai, Kaizhan Wang, Wei Jiao, Zhiyuan Pang, Sheng Zhu
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Publication number: 20180159477Abstract: A power amplifier, a radio remote unit (RRU), and a base station, where the power amplifier includes an envelope controller, a main power amplifier, and an auxiliary power amplifier. The main power amplifier and the auxiliary power amplifier both set an envelope voltage output by the envelope modulator as operating voltages, and because the operating voltages of the main power amplifier and the auxiliary power amplifier may be adjusted simultaneously, symmetry of the power amplifier is improved, and an efficiency loss occurring probability is low, thereby enhancing efficiency of the power amplifier.Type: ApplicationFiled: February 5, 2018Publication date: June 7, 2018Inventors: Lipeng Zhang, Zhonghua Cai, Ting Li, Kaizhan Wang
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Patent number: 9929695Abstract: A power amplifier, a radio remote unit (RRU), and a base station, where the power amplifier includes an envelope controller, a main power amplifier, and an auxiliary power amplifier. The main power amplifier and the auxiliary power amplifier both set an envelope voltage output by the envelope modulator as operating voltages, and because the operating voltages of the main power amplifier and the auxiliary power amplifier may be adjusted simultaneously, symmetry of the power amplifier is improved, and an efficiency loss occurring probability is low, thereby enhancing efficiency of the power amplifier.Type: GrantFiled: February 10, 2017Date of Patent: March 27, 2018Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Lipeng Zhang, Zhonghua Cai, Ting Li, Kaizhan Wang
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Publication number: 20170155364Abstract: A power amplifier, a radio remote unit (RRU), and a base station, where the power amplifier includes an envelope controller, a main power amplifier, and an auxiliary power amplifier. The main power amplifier and the auxiliary power amplifier both set an envelope voltage output by the envelope modulator as operating voltages, and because the operating voltages of the main power amplifier and the auxiliary power amplifier may be adjusted simultaneously, symmetry of the power amplifier is improved, and an efficiency loss occurring probability is low, thereby enhancing efficiency of the power amplifier.Type: ApplicationFiled: February 10, 2017Publication date: June 1, 2017Inventors: Lipeng Zhang, Zhonghua Cai, Ting Li, Kaizhan Wang