Patents by Inventor Tsun-hsu Chang

Tsun-hsu Chang 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).

  • Publication number: 20200281395
    Abstract: Disclosures of the present invention describe a coaxial microwave rotary applicator for material processing, mainly comprising: a waveguide unit, a microwave generator connected to one end of the waveguide unit, a bearing unit, a chamber, a rotary shaft, a driver unit, a sampling unit. The bearing unit is connected to the waveguide unit through a non-rotary ring, and the chamber is connected to a rotary ring of the bearing unit, and the microwave generator is configured for supplying a microwave to the chamber. By such arrangements, it is able to uniformly heat a specific material disposed in the chamber by driving the chamber to rotate. It is worth noting that, a user is allowed to clearly observe the processing progress via the sampling unit during the heating process of the specific material.
    Type: Application
    Filed: November 7, 2019
    Publication date: September 10, 2020
    Inventors: HSEIN-WEN CHAO, TSUN-HSU CHANG, HUAN-JUN GUO, CHENG-HSUAN CHAN, PO-YEN CHIU, YU-TZU CHANG
  • Publication number: 20200187317
    Abstract: A microwave applicator includes a chamber, at least one microwave source, a stirrer and a cooling structure. The microwave source is disposed on one side of the chamber. The stirrer is disposed in the chamber, wherein the stirrer includes an axial member and a plurality of blades. Each of the blades is connected to the axial member, and the axial member and the blades are made of metal materials. The cooling structure is disposed in the chamber and includes at least one cooling tube for allowing a cooling liquid passing through the chamber.
    Type: Application
    Filed: August 15, 2019
    Publication date: June 11, 2020
    Inventors: Tsun-Hsu CHANG, Hsien-Wen CHAO, Shen-Fu CHEN
  • Publication number: 20200179898
    Abstract: A microwave reactor includes a chamber, at least one microwave source, a sprayer and a vapor extractor. The chamber includes a containing space and a reacting space. The containing space is communicated with the reacting space and provided for containing a reactant. The microwave source is connected to one side wall of the reacting space of the chamber. The sprayer is communicated with the containing space of the chamber for turning the reactant into a mist and spraying the mist in the reacting space of the chamber. The vapor extractor is connected to the reacting space. When the water contained in the mist is gasified to produces a water vapor, the water vapor can be exhausted from the chamber by the vapor extractor.
    Type: Application
    Filed: August 1, 2019
    Publication date: June 11, 2020
    Inventors: Tsun-Hsu CHANG, Hsien-Wen CHAO, Shen-Fu CHEN
  • Patent number: 10353022
    Abstract: A measuring apparatus for electromagnetic property of material includes a chamber and a specified shielding piece. The chamber has a cavity inside and the chamber has an electromagnetic wave access terminal to connect to the cavity, used to receive an input electromagnetic wave and output a reflective electromagnetic wave. The specified shielding piece is disposed inside the cavity with respect to the electromagnetic wave access terminal, used to produce a region in side the cavity. The region is dominated by magnetic field and is used to adapt an object to be measured.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: July 16, 2019
    Assignee: National Tsing Hua University
    Inventors: Tsun-Hsu Chang, Wei-Syuan Wong, Yan-Ren Chen, Hsien-Wen Chao
  • Publication number: 20180120388
    Abstract: A measuring apparatus for electromagnetic property of material includes a chamber and a specified shielding piece. The chamber has a cavity inside and the chamber has an electromagnetic wave access terminal to connect to the cavity, used to receive an input electromagnetic wave and output a reflective electromagnetic wave. The specified shielding piece is disposed inside the cavity with respect to the electromagnetic wave access terminal, used to produce a region in side the cavity. The region is dominated by magnetic field and is used to adapt an object to be measured.
    Type: Application
    Filed: March 31, 2017
    Publication date: May 3, 2018
    Applicant: National Tsing Hua University
    Inventors: Tsun-Hsu Chang, Wei-Syuan Wong, Yan-Ren Chen, Hsien-Wen Chao
  • Patent number: 9810645
    Abstract: A system for measuring a permittivity includes a resonant chamber, a conductive probe, a platform, a pillar, a detector, and a computing module. The resonant chamber has a cavity. The conductive probe is configured for introducing a microwave into the cavity of the resonant chamber. The platform is configured for carrying a sample. The pillar is positioned between the platform and a chamber wall, so that the platform protrudes from the chamber wall. The detector is used to detect a resonant frequency of the microwave when resonance occurs within the cavity. The computing module is configured for calculating a permittivity corresponding to the measured resonant frequency according to a corresponding relationship between resonant frequency and permittivity. The above-mentioned system for measuring a permittivity is capable of measuring a broader range of permittivity with simplified measurement steps and higher accuracy. A method for measuring a permittivity is also disclosed.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: November 7, 2017
    Assignee: NATIONAL TSING HUA UNIVERSITY
    Inventors: Tsun-Hsu Chang, Hsein-Wen Chao, Wei-Syuan Wong
  • Publication number: 20160146742
    Abstract: A system for measuring a permittivity includes a resonant chamber, a conductive probe, a platform, a pillar, a detector, and a computing module. The resonant chamber has a cavity. The conductive probe is configured for introducing a microwave into the cavity of the resonant chamber. The platform is configured for carrying a sample. The pillar is positioned between the platform and a chamber wall, so that the platform protrudes from the chamber wall. The detector is used to detect a resonant frequency of the microwave when resonance occurs within the cavity. The computing module is configured for calculating a permittivity corresponding to the measured resonant frequency according to a corresponding relationship between resonant frequency and permittivity. The above-mentioned system for measuring a permittivity is capable of measuring a broader range of permittivity with simplified measurement steps and higher accuracy. A method for measuring a permittivity is also disclosed.
    Type: Application
    Filed: March 20, 2015
    Publication date: May 26, 2016
    Inventors: Tsun-Hsu CHANG, Hsein-Wen CHAO, Wei-Syuan WONG
  • Patent number: 9276303
    Abstract: A multi-channel mode converter operating with a series of TE or TM mode electromagnetic wave includes a plurality of coaxial waveguides arranged in overlay configuration. By controlling radius ratio and the number of coupling aperture of each coaxial waveguide, high power and high purity of operating mode of electromagnetic wave can be obtained and the major parasitic mode of electromagnetic wave can be suppressed, so as to avoid crosstalk between coaxial waveguides. A rotary joint including the above-mentioned mode converter with multi-channel is also disclosed.
    Type: Grant
    Filed: June 12, 2012
    Date of Patent: March 1, 2016
    Assignee: National Tsing Hua University
    Inventors: Tsun-Hsu Chang, Nai-Ching Chen
  • Patent number: 9006626
    Abstract: A multi-slot resonant microwave device comprises a plurality of slot microwave resonator units and at least one microwave emitting source. Each of the plurality of slot microwave resonator unit is defined as a slot resonant cavity. Whenever at least one of the microwave emitting sources emits microwave power into the plurality of slot microwave resonator units, the plurality of slot microwave resonator units resonate simultaneously, and produce an electromagnetic field with the same polarization direction. Therefore, the multi-slot resonator device can deal with large-area microwave heating with greater microwave effect to shorten operating time and accomplish the objective of homogeneous and megathermal microwave heating.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: April 14, 2015
    Assignee: National Tsing Hua University
    Inventors: Tsun-Hsu Chang, Tsung-Shune Chin, Hsien-Wen Chao, Shih-Chieh Fong
  • Patent number: 8552743
    Abstract: A microwave diffraction system includes two plates, a lattice model, a transmitter and a detector. The two plates are electrically conductive and configured in a parallel manner so as to form a planar waveguide. The lattice model includes a plurality of cylinders arranged in regular order and is placed between the two plates. The transmitter is arranged at an outside edge of the planar waveguide and configured for providing a microwave towards the lattice model. The detector is arranged at outside edge of the planar waveguide and configured for detecting the microwave reflected from the lattice model. The diffraction pattern obtained by the above-mentioned microwave diffraction system is similar to theoretical value.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: October 8, 2013
    Assignee: National Tsing Hua University
    Inventors: Tsun-Hsu Chang, Ching-Pin Yuan
  • Publication number: 20130257563
    Abstract: A multi-channel mode converter operating with a series of TE or TM mode electromagnetic wave includes a plurality of coaxial waveguides arranged in overlay configuration. By controlling radius ratio and the number of coupling aperture of each coaxial waveguide, high power and high purity of operating mode of electromagnetic wave can be obtained and the major parasitic mode of electromagnetic wave can be suppressed, so as to avoid crosstalk between coaxial waveguides. A rotary joint including the above-mentioned mode converter with multi-channel is also disclosed.
    Type: Application
    Filed: June 12, 2012
    Publication date: October 3, 2013
    Applicant: NATIONAL TSING HUA UNIVERSITY
    Inventors: TSUN-HSU CHANG, NAI-CHING CHEN
  • Publication number: 20130175261
    Abstract: A multi-slot resonant microwave device comprises a plurality of slot microwave resonator units and at least one microwave emitting source. Each of the plurality of slot microwave resonator unit is defined as a slot resonant cavity. Whenever at least one of the microwave emitting sources emits microwave power into the plurality of slot microwave resonator units, the plurality of slot microwave resonator units resonate simultaneously, and produce an electromagnetic field with the same polarization direction. Therefore, the multi-slot resonator device can deal with large-area microwave heating with greater microwave effect to shorten operating time and accomplish the objective of homogeneous and megathermal microwave heating.
    Type: Application
    Filed: November 19, 2012
    Publication date: July 11, 2013
    Applicant: NATIONAL TSING HUA UNIVERSITY
    Inventors: TSUN-HSU CHANG, TSUNG-SHUNE CHIN, HSIEN-WEN CHAO, SHIH-CHIEH FONG
  • Patent number: 8390199
    Abstract: A mode-selective interactive structure for gyrotrons includes a plurality of metal tubes, wherein an inner wall of each metal tube forms a waveguide; and between each adjacent pair of the metal tubes exists a slice with a first interface and a second interface and when an electromagnetic wave comprising an operating mode and a competing mode propagates through the slice, the competing mode is partially reflected upon, partially transmitted through and/or absorbed at the first interface and the second interface of the slice so that the power loss of the competing mode is larger than the operating mode and the production of the competing modes is suppressed progressively thereby achieving mode selection.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: March 5, 2013
    Assignee: National Tsing Hua University
    Inventors: Tsun-Hsu Chang, Nai-Ching Chen
  • Publication number: 20130029497
    Abstract: A method is developed to crystallize amorphous silicon (a-Si) thin films, in cold environment, by combining microwave-absorbing materials (MAM) and microwave irradiation. The MAM is set on top or around of the a-Si thin film. MAM composes of dielectric, magnetic, semiconductor, ferroelectric and carbonaceous material oxides, carbides, nitrides and borides, which will absorb and concentrate electric or magnetic field of the microwave. The microwave frequency is selected from 1 to 50 GHz, at a power density not less than 5 W/cm2. Temperature rise of the MAM is monitored and controlled by an optical pyrometer to be less than 600° C., and better be within 400-500° C. The application of MAM at patterned local areas leads to localized heating and crystallization of a-Si film right at the patterns to facilitate manufacture of semiconductor devices.
    Type: Application
    Filed: February 17, 2012
    Publication date: January 31, 2013
    Applicant: NATIONAL TSING HUA UNIVERSITY
    Inventors: Tsung-Shune Chin, Tsun-Hsu Chang, Shih-Chieh Fong, Hsien-Wen Chao
  • Patent number: 8324985
    Abstract: An isolated dual-mode converter includes a TE01 mode converter including a circular waveguide, and a plurality of rectangular waveguides connected to the circumference of the circular waveguide; and a TM01 mode converter including a coaxial waveguide, formed by coaxial outer and inner conductors, and the circular waveguide connected and aligned axially with the coaxial waveguide, wherein a symmetrical axis of an opening at the end of the rectangular waveguides connected to the circular waveguide is parallel to the axis of the circular waveguide, thereby avoiding interfering with the propagation of TM01 mode. In an application, the isolated dual-mode converter outputs TE01 mode and TM01 mode at the same port, thereby achieving more uniform microwave heating. In another application, two isolated dual-mode converters are aligned face-to-face, forming a dual-channel joint with high channel isolation and low transmission loss, which may be used for a rotary joint of a radar system.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: December 4, 2012
    Assignee: National Tsing Hua University
    Inventors: Tsun-Hsu Chang, Nai-Ching Chen, Chun-Tan Wu
  • Patent number: 8228007
    Abstract: The invention discloses a microwave supplying apparatus including a microwave generator, a first power divider, a second power divider, a first waveguide, and a second wave guide. The first waveguide is connected to the microwave generator and has a first output terminal and a second output terminal to divide a microwave generated by the microwave generator along a first direction. The second power divider is connected to the first output terminal and has a third output terminal and a fourth output terminal to divide the microwave along a second direction. The first waveguide and the second waveguide are connected to the third output terminal and the fourth terminal respectively and receive the microwave through the first power divider and the second power divider to respectively output the microwave fields with approximate intensity distributions.
    Type: Grant
    Filed: December 24, 2009
    Date of Patent: July 24, 2012
    Assignees: Chung-Shan Institute of Science and Technology, Armaments Bureau, Ministry of National Defense
    Inventors: Chung-Chun Huang, Tsun-Hsu Chang, Bo-Hung Lin, Chi-Wen Hu
  • Publication number: 20120111497
    Abstract: The present invention discloses a complex epoxy resin adhesive added with carbon nanotubes, and the complex epoxy resin adhesive can be prepared in advance and then stored at room temperature. When use, the preheating step is no longer required anymore, and the complex epoxy resin adhesive mixed with carbon nanotubes is coated uniformly onto an adhering position, and microwave is used for heating and curing the adhesive, so as to achieve the dual effects of surpassing the enhanced curing property of a simple epoxy resin and reducing the curing time.
    Type: Application
    Filed: December 4, 2010
    Publication date: May 10, 2012
    Applicant: National Tsing Hua University
    Inventors: Shih-Chin Chang, Tsun-Hsu Chang, Tzu-Huan Chiu, Tsung-Han Chen
  • Publication number: 20120049862
    Abstract: A microwave diffraction system includes two plates, a lattice model, a transmitter and a detector. The two plates are electrically conductive and configured in a parallel manner so as to form a planar waveguide. The lattice model includes a plurality of cylinders arranged in regular order and is placed between the two plates. The transmitter is arranged at an outside edge of the planar waveguide and configured for providing a microwave towards the lattice model. The detector is arranged at outside edge of the planar waveguide and configured for detecting the microwave reflected from the lattice model. The diffraction pattern obtained by the above-mentioned microwave diffraction system is similar to theoretical value.
    Type: Application
    Filed: October 21, 2010
    Publication date: March 1, 2012
    Inventors: Tsun-Hsu CHANG, Ching-Pin Yuan
  • Publication number: 20110221545
    Abstract: An isolated dual-mode converter includes a TE01 mode converter including a circular waveguide, and a plurality of rectangular waveguides connected to the circumference of the circular waveguide; and a TM01 mode converter including a coaxial waveguide, formed by coaxial outer and inner conductors, and the circular waveguide connected and aligned axially with the coaxial waveguide, wherein a symmetrical axis of an opening at the end of the rectangular waveguides connected to the circular waveguide is parallel to the axis of the circular waveguide, thereby avoiding interfering with the propagation of TM01 mode. In an application, the isolated dual-mode converter outputs TE01 mode and TM01 mode at the same port, thereby achieving more uniform microwave heating. In another application, two isolated dual-mode converters are aligned face-to-face, forming a dual-channel joint with high channel isolation and low transmission loss, which may be used for a rotary joint of a radar system.
    Type: Application
    Filed: June 24, 2010
    Publication date: September 15, 2011
    Inventors: Tsun-Hsu Chang, Nai-Ching Chen, Chun-Tan Wu
  • Patent number: 7973613
    Abstract: A microwave rotary joint comprises a mode converter for converting microwave signals of a TE01 circular symmetric mode, and the mode converter comprises: two circular waveguides, one end of each of the waveguides has a circular input/output port; and two power dividing structures, each of the power dividing structure has an input/output port and four connecting ports, the four connecting ports are separated and surround each of the circular waveguides and connected to the inside of each of the circular waveguides, the two circular waveguides are integrated as one member through rotating a bearing.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: July 5, 2011
    Assignee: National Tsing Hua University
    Inventors: Tsun-Hsu Chang, Bo-Ren Yu