Patents by Inventor Dal Ahn
Dal Ahn 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: 11201592Abstract: The present invention relates to a Doherty combiner used in a Doherty power amplifier, the Doherty combiner comprising: a phase shift section connected to one end of a carrier amplifier so as to change a phase of an RF signal output from the carrier amplifier; a matching section connected to an output terminal of the Doherty power amplifier so as to impedance-match an output of the Doherty power amplifier; and a bandwidth improvement section connected to one end of a peaking amplifier so as to change at least one of a phase bandwidth and an amplitude bandwidth of the Doherty power amplifier.Type: GrantFiled: October 23, 2017Date of Patent: December 14, 2021Assignee: SOONCHUNHYANG UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATIONInventors: Dal Ahn, Kwan-Sun Choi, Jong-Sik Lim, Sang-Min Han, Sung-Min Kim, You-Na Jang, Dae-Ung Lee, Jun-Seok Oh, Seo Koo, Tae-Hoon Kang, Ji-Won Kim, Ik-Soo Jang
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Publication number: 20200228065Abstract: The present invention relates to a Doherty combiner used in a Doherty power amplifier, the Doherty combiner comprising: a phase shift section connected to one end of a carrier amplifier so as to change a phase of an RF signal output from the carrier amplifier; a matching section connected to an output terminal of the Doherty power amplifier so as to impedance-match an output of the Doherty power amplifier; and a bandwidth improvement section connected to one end of a peaking amplifier so as to change at least one of a phase bandwidth and an amplitude bandwidth of the Doherty power amplifier.Type: ApplicationFiled: October 23, 2017Publication date: July 16, 2020Inventors: Dal AHN, Kwan-Sun CHOI, Jong-Sik LIM, Sang-Min HAN, Sung-Min KIM, You-Na JANG, Dae-Ung LEE, Jun-Seok OH, Seo KOO, Tae-Hoon KANG, Ji-Won KIM, Ik-Soo JANG
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Publication number: 20180034127Abstract: A planar type magic tee includes a first coupling unit, a second coupling unit, and transmission lines for connecting the first coupling unit and the second coupling unit to each other in a cascading manner, the transmission lines having different characteristic impedances. The planar type magic tee is capable of solving the problem caused due to the intrinsic limitation in bandwidth of a conventional ring hybrid coupler.Type: ApplicationFiled: December 31, 2015Publication date: February 1, 2018Applicant: SOONCHUNHYANG UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATIONInventors: Dal AHN, HanJu DO, Heehwang KIM, YouNa JANG, JongSik LIM
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Patent number: 9219465Abstract: Provided is a bulk acoustic wave resonator (BAWR). The BAWR may include a bulk acoustic wave resonance unit and an anti-resonant frequency modifying unit to modify an anti-resonant frequency generated from the bulk acoustic wave resonance unit.Type: GrantFiled: March 27, 2012Date of Patent: December 22, 2015Assignee: Samsung Electronics Co., Ltd.Inventors: Chul Soo Kim, Dal Ahn, Jae Shik Shin, In Sang Song, Duck Hwan Kim, Sang Uk Son, Ho Soo Park
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Patent number: 9184724Abstract: Provided is a bulk acoustic wave resonator (BAWR). The BAWR may include a bulk acoustic wave resonance unit and an anti-resonant frequency modifying unit to modify an anti-resonant frequency generated from the bulk acoustic wave resonance unit.Type: GrantFiled: March 27, 2012Date of Patent: November 10, 2015Assignee: Samsung Electronics Co., Ltd.Inventors: Chul Soo Kim, Dal Ahn, Jae Shik Shin, In Sang Song, Duck Hwan Kim, Sang Uk Son, Ho Soo Park
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Patent number: 9166555Abstract: A phase shifter using a Bulk Acoustic Wave Resonators (BAWR) is provided. The phase shifter using a BAWR may use a property of a phase shift with respect to a frequency of the BAWR, and also use at least one capacitor, at least one inductor, and the like.Type: GrantFiled: March 18, 2013Date of Patent: October 20, 2015Assignee: Samsung Electronics Co., Ltd.Inventors: Jea Shik Shin, Dal Ahn, Duck Hwan Kim, In Sang Song, Chul Soo Kim, Yun Kwon Park, Hyung Rak Kim
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RESONATOR INCLUDING VERTICALLY OR HORIZONTALLY ALTERNATING PARTITION WALLS AND FILTER USING THE SAME
Publication number: 20150263407Abstract: The present invention relates to a resonator and a filter using the same, and particularly, to a resonator, which includes partition walls that alternate vertically or horizontally in a cavity, and a filter using the resonator. The resonator includes: a housing which is made of a conductive material and includes a cavity; a cover which is made of a conductive material and fixed to an upper portion of the cavity, and seals the cavity; one or more first partition walls which are connected to one surface of inner surfaces of the cavity; and one or more second partition walls which are connected to the opposite surface to the one surface, in which the first partition walls and the second partition walls are made of a conductive material and have shapes corresponding to each other, and the first partition walls and the second partition walls alternate with each other.Type: ApplicationFiled: March 9, 2015Publication date: September 17, 2015Inventors: Dal Ahn, Yun Hong Yang, Seok Hwi Kim, Ki Suk Kim -
Patent number: 9059491Abstract: Disclosed are a microstrip transmission line having a common defected ground structure (DGS) and a wireless circuit apparatus having the same. The microstrip transmission line realizes a common defected ground structure (DGS) and a double microstrip structure, and includes: a first dielectric layer; a first signal line pattern formed on a first surface of the first dielectric layer; a common ground conductive layer formed on a second surface of the first dielectric layer and having a defected ground structure, the first surface facing the second surface; a second dielectric layer having a first surface brought into contact with the common ground conductive layer, and facing the first dielectric layer while interposing the common ground conductive layer between the first dielectric layer and the second dielectric layer; and a second signal line pattern formed on a second surface of the second dielectric layer, the first surface facing the second surface.Type: GrantFiled: October 6, 2011Date of Patent: June 16, 2015Assignee: Soonchunhyang University Industry Academy Cooperation FoundationInventors: Jongsik Lim, Dal Ahn
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Publication number: 20140320239Abstract: The present invention can couple multiple resonances through a change in the shape of a part of a dielectric resonance element or of a cavity so as to couple energy between resonances when generating the multiple resonances, such as dual or triple resonances, of the dielectric resonance element in one cavity, thereby simplifying the shape and reducing the size thereof. In addition, a dielectric resonance element is manufactured into the shape of a doughnut so as to generate triple resonances in one cavity, thereby facilitating the manufacture of the dielectric resonance element and the emission of heat from the dielectric resonance element.Type: ApplicationFiled: July 7, 2014Publication date: October 30, 2014Inventors: Yun-Hong PARK, Dal Ahn
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Patent number: 8854157Abstract: Disclosed is a balun including a film bulk acoustic resonator (FBAR). The balun may be implemented using the FBAR to fabricate a small sized balun. Also, the balun may be implemented using the FBAR, thereby reducing a difference in two outputs.Type: GrantFiled: July 12, 2010Date of Patent: October 7, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Duck Hwan Kim, Dal Ahn, Chul Soo Kim, In Sang Song, Yun Kwon Park, Jea Shik Shin, Hyung Rak Kim
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Publication number: 20130249644Abstract: A phase shifter using a Bulk Acoustic Wave Resonators (BAWR) is provided. The phase shifter using a BAWR may use a property of a phase shift with respect to a frequency of the BAWR, and also use at least one capacitor, at least one inductor, and the like.Type: ApplicationFiled: March 18, 2013Publication date: September 26, 2013Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jea Shik SHIN, Dal AHN, Duck Hwan KIM, In Sang SONG, Chul Soo KIM, Yun Kwon PARK, Hyung Rak KIM
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Patent number: 8531253Abstract: In an ultra-wideband (UWB) band-pass filter, an equivalent circuit of a band-pass filter for direct frequency conversion is configured to have a series LC resonator and a parallel LC resonator, the parallel LC resonator is implemented as a short stub and an open stub, and the series LC resonator is implemented by modeling an inductor and a capacitor as a distributed constant circuit. The series LC resonator is implemented to have a 3D structure for effective designing of the band-pass filter by a new method of implementing a series resonator circuit. In the UWB band-pass filter, a low-pass filter for improving band-stop characteristics is additionally connected.Type: GrantFiled: December 16, 2008Date of Patent: September 10, 2013Assignee: Soonchunhyang University Industry Academy Cooperation FoundationInventors: Dal Ahn, Jong Im Park
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Patent number: 8416037Abstract: A phase shifter using a Bulk Acoustic Wave Resonators (BAWR) is provided. The phase shifter using a BAWR may use a property of a phase shift with respect to a frequency of the BAWR, and also use at least one capacitor, at least one inductor, and the like.Type: GrantFiled: July 12, 2010Date of Patent: April 9, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Jea Shik Shin, Dal Ahn, Duck Hwan Kim, In Sang Song, Chul Soo Kim, Yun Kwon Park, Hyung Rak Kim
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Publication number: 20130033340Abstract: Provided is a bulk acoustic wave resonator (BAWR). The BAWR may include a bulk acoustic wave resonance unit and an anti-resonant frequency modifying unit to modify an anti-resonant frequency generated from the bulk acoustic wave resonance unit.Type: ApplicationFiled: March 27, 2012Publication date: February 7, 2013Inventors: Chul Soo Kim, Dal Ahn, Jae Shik Shin, In Sang Song, Duck Hwan Kim, Sang Uk Son, Ho Soo Park
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Patent number: 8358587Abstract: A system for performing a local wireless communication using a predetermined frequency band divided into a plurality of channels. The system includes a hub for scanning each channel to identify available one of the plurality of channels and transmitting data over the available channel. The system further includes a sensor set to start to operate when the sensor detects a signal within the predetermined frequency band. The sensor spectrum-senses the signal of the frequency band for each channel, and analyzes a header of packet data for each channel, and receives and processes the packet data if the signal is identified to have a designated code.Type: GrantFiled: December 11, 2009Date of Patent: January 22, 2013Assignee: Soonchunhyang University Industry Academy Cooperation FoundationInventors: Sang-Min Han, Jong-Sik Lim, Dal Ahn, Won-Sang Yoon, Young-Sik Kim
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Patent number: 8330551Abstract: Disclosed herein is a dual band high frequency amplifier using a composite right/left handed (CRLH) transmission line (TL). Accordingly, a CRLH TL structure having a dual band characteristic is inserted into an input matching circuit and/or an output matching circuit in the high frequency amplifier, and a matching circuit is designed so that impedance matching is performed at two frequencies, thereby obtaining both gain and matching characteristics at the two frequencies.Type: GrantFiled: July 9, 2010Date of Patent: December 11, 2012Assignee: Soonchunhyang University Industry Academy Cooperation FoundationInventors: Jongsik Lim, Dal Ahn
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Publication number: 20120112857Abstract: Disclosed are a microstrip transmission line having a common defected ground structure (DGS) and a wireless circuit apparatus having the same. The microstrip transmission line realizes a common defected ground structure (DGS) and a double microstrip structure, and includes: a first dielectric layer; a first signal line pattern formed on a first surface of the first dielectric layer; a common ground conductive layer formed on a second surface of the first dielectric layer and having a defected ground structure, the first surface facing the second surface; a second dielectric layer having a first surface brought into contact with the common ground conductive layer, and facing the first dielectric layer while interposing the common ground conductive layer between the first dielectric layer and the second dielectric layer; and a second signal line pattern formed on a second surface of the second dielectric layer, the first surface facing the second surface.Type: ApplicationFiled: October 6, 2011Publication date: May 10, 2012Inventors: Jongsik LIM, Dal AHN
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Publication number: 20110115558Abstract: Disclosed herein is a dual band high frequency amplifier using a composite right/left handed (CRLH) transmission line (TL). Accordingly, a CRLH TL structure having a dual band characteristic is inserted into an input matching circuit and/or an output matching circuit in the high frequency amplifier, and a matching circuit is designed so that impedance matching is performed at two frequencies, thereby obtaining both gain and matching characteristics at the two frequencies.Type: ApplicationFiled: July 9, 2010Publication date: May 19, 2011Inventors: Jongsik Lim, Dal Ahn
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Publication number: 20110102099Abstract: A phase shifter using a Bulk Acoustic Wave Resonators (BAWR) is provided. The phase shifter using a BAWR may use a property of a phase shift with respect to a frequency of the BAWR, and also use at least one capacitor, at least one inductor, and the like.Type: ApplicationFiled: July 12, 2010Publication date: May 5, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jea Shik SHIN, Dal Ahn, Duck Hwan Kim, In Sang Song, Chul Soo Kim, Yun Kwon Park, Hyung Rak Kim
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Publication number: 20110095849Abstract: Disclosed is a balun including a film bulk acoustic resonator (FBAR). The balun may be implemented using the FBAR to fabricate a small sized balun. Also, the balun may be implemented using the FBAR, thereby reducing a difference in two outputs.Type: ApplicationFiled: July 12, 2010Publication date: April 28, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Duck Hwan KIM, Dal Ahn, Chul Soo Kim, In Sang Song, Yun Kwon Park, Jea Shik Shin, Hyung Rak Kim