Patents Assigned to Information and Communications University
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Patent number: 6995714Abstract: An internal antenna for use in a mobile handset is formed of a single conductive plate. The internal antenna includes a first meander-shaped portion having one or more slots, including a first bent portion bent downward at a side edge of the first meander-shaped portion; a second meander-shaped portion having one or more slots, including a second bent portion bent downward at an end of the second meander-shaped portion; and a common portion physically connected to the first and the second meander-shaped portion. The first meander-shaped portion together with the common portion forms a first radiating element and the second meander-shaped portion together with the common portion forms a second radiating element, the first radiating element having a first resonant frequency and the second radiating element having a second resonant frequency.Type: GrantFiled: November 14, 2003Date of Patent: February 7, 2006Assignee: Information and Communications University Educational FoundationInventors: Dong-Uk Sim, Seong-Ook Park
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Patent number: 6982675Abstract: The present invention is directed to an internal multi-band antenna with multiple layers and which comprises a main radiation patch for forming an upper side of the antenna, one side of the main radiation patch connected to a feeder, the main radiation patch including a plurality of strips in the same plane and formed by a folded slit patch of maze type; and at least one auxiliary radiation patch bent downwardly at one side of an edge of the main radiation patch and formed in parallel to the main radiation patch between the main radiation patch and a feeder ground plane.Type: GrantFiled: February 19, 2004Date of Patent: January 3, 2006Assignee: Information and Communications University Educational FoundationInventors: Won Il Kwak, Seong Ook Park, Young Hyuk Ko
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Patent number: 6980172Abstract: The present invention is directed to a multi-band cable antenna.Type: GrantFiled: February 19, 2004Date of Patent: December 27, 2005Assignee: Information and Communications University Educational FoundationInventors: Won Il Kwak, Seong Ook Park
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Publication number: 20050264371Abstract: A differential voltage controlled oscillator comprises first and second transistors having opposite magnitudes and directions of currents flowing to a third electrode from a second electrode corresponding to a voltage between first and second electrodes; and a resonance circuit coupled to the second electrodes of the first and second transistors and controlling a frequency of an oscillation signal corresponding to a control voltage. The second electrode of the first transistor is coupled to the first electrode of the second transistor to form a first output terminal, the first electrode of the first transistor is coupled to the second electrode of the second transistor to form a second output terminal, and the third electrodes of the first and second transistors are coupled to first and second powers.Type: ApplicationFiled: June 1, 2005Publication date: December 1, 2005Applicant: Information and Communications University research and Industrial Cooperation GroupInventors: Sang Lee, So Shin, Seok Yun
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Publication number: 20050253758Abstract: The present invention provides an multi-layered multi-band antenna used for a communication apparatus for a mobile communication service, comprising: a PCB having power supply and ground portions; an upper plane antenna separated from an upper plane of the PCB, the upper plane antenna consisting of a metal conductor having a predetermined pattern formed with a U-shaped slot; an intermediate plane antenna interposed between the upper plane antenna and the PCB in parallel with the upper plane antenna, the intermediate plane antenna consisting of a metal conductor having a predetermined pattern formed with a U-shaped slot; a power supply metal conductor having the one side connected to a power supply portion of the PCB and the other side connected to one side of the intermediate plane antenna; a ground metal conductor having the one side connected to a ground portion of the PCB and the other side connected to one side of the intermediate plane antenna; and a plurality of short-circuiting metal conductors interpoType: ApplicationFiled: November 9, 2004Publication date: November 17, 2005Applicant: Information and Communication University Educational FoundationInventors: Kwak-Won Il, Seong-Ook Park
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Publication number: 20050182791Abstract: The present invention relates to a method and a system for a multimedia consumption based on user characteristics and user's terminal characteristics and a recording medium thereof. The present invention includes a user information terminal for transmitting context metadata manually set and/or automatically computed at a user information terminal for consuming multimedia contents via a network; a display terminal for parsing the transmitted context metadata, transmitting the content request data and context metadata to a content server and then receiving, decoding and displaying the multimedia data adapted in response to the transmission; and a content server system for creating adaptation contents by adapting original contents based on the received metadata and then transmitting the created adaptation contents via a network.Type: ApplicationFiled: November 12, 2004Publication date: August 18, 2005Applicant: Information and Communications University Educational FoundationInventors: Jeongyeon Lim, Munchurl Kim
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Patent number: 6914488Abstract: A broadband amplification apparatus for extending a bandwidth includes a first and a second amplifying unit for amplifying an input signal, a buffering unit and a first inductive buffer. The buffering unit disposed between the first and the second amplifying unit buffers an output signal of the first amplifying unit to thereby maintain a bandwidth of the output signal, increases a gain and returns back a portion of the buffered signal to the first amplifying unit. The first inductive buffer, which is connected to the buffer unit, enhances input impedance as a frequency increases within a predetermined range, thereby introducing little gain changes while serving to extend a bandwidth.Type: GrantFiled: July 3, 2003Date of Patent: July 5, 2005Assignee: Information and Communications University Educational FoundationInventors: Sang-Hyun Park, Dong Yun Jung, Chul Soon Park
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Publication number: 20050122267Abstract: An internal antenna for use in a mobile handset is formed of a single conductive plate. The internal antenna includes a first meander-shaped portion having one or more slots, including a first bent portion bent downward at a side edge of the first meander-shaped portion; a second meander-shaped portion having one or more slots, including a second bent portion bent downward at an end of the second meander-shaped portion; and a common portion physically connected to the first and the second meander-shaped portion. The first meander-shaped portion together with the common portion forms a first radiating element and the second meander-shaped portion together with the common portion forms a second radiating element, the first radiating element having a first resonant frequency and the second radiating element having a second resonant frequency.Type: ApplicationFiled: November 14, 2003Publication date: June 9, 2005Applicant: Information and Communications University Educational FoundationInventors: Dong-Uk Sim, Seong-Ook Park
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Patent number: 6892062Abstract: A current-reusing bleeding mixer capable of providing a higher conversion gain, linearity and lower noise figure employing a field-effect transistor includes a first to a fourth transistor and a first and a second load element. The first transistor amplifies a radio frequency (RF) signal. The second and the third transistor, each connected to the first transistor, receive a balanced local oscillator (LO) signal to mix it with the RF signal. The first and the second load element are connected between a supply voltage source and the second transistor and between the supply voltage source and the third transistor, respectively. The fourth transistor, connected between the supply voltage source and the first transistor, amplifies the RF signal and bleeds a current from the supply voltage source.Type: GrantFiled: April 9, 2001Date of Patent: May 10, 2005Assignee: Information and Communications University Educational FoundationInventors: Sang Gug Lee, Jung-Ki Choi, Nam-Soo Kim
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Patent number: 6870965Abstract: A texture description method in a frequency domain for extracting texture features by transforming and Gabor-filtering an input image into an image of the frequency domain, and a texture-based retrieval method thereof are provided. The texture description method in the frequency domain includes: a first step of transforming an image of a time domain into an image of the frequency domain; a second step of filtering the transformed image using a Gabor filter having N×M filter regions, where N and M are respective predetermined positive integers; a third step of extracting feature values of the image that has been Gabor-filtered in respective channels of the frequency domain division layout corresponding to the N×M filter regions of the Gabor filter; and a fourth step of deciding a texture descriptor of the image on the basis of the feature values of the image.Type: GrantFiled: December 4, 2000Date of Patent: March 22, 2005Assignees: Samsung Electronics Co., Ltd., Electronics and Telecommunications Research Institute, Curitel Communications Inc., Heinrich-Hertz-Institut fur Nachrichtentechnik Berlin Gesellschaft mit Beschrankter Haftung, The Regents of the University of California, Information and Communications University Educational FoundationInventors: Mun-churl Kim, Jin-woong Kim, Banglore S. Manjunath, Yong-man Ro, Hyun-doo Shin, Yang-lim Choi
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Publication number: 20050045376Abstract: In a Conductor-Backed Coplanar Waveguide (CBCPW) structure, an effective dielectric constant of a parallel plate waveguide is higher than that of a Coplanar Waveguide (CPW), so that a parallel plate leakage is generated. To reduce the parallel plate leakage, the present invention provides air cavities, whose dielectric constant is low, in a multilayer circuit so that the effective dielectric constant of the parallel plate waveguide of the CBCPW structure can be lowered.Type: ApplicationFiled: June 22, 2004Publication date: March 3, 2005Applicant: Information And Communications University Educational FoundationInventors: Young Lee, Chul Park, Yun Cho
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Publication number: 20050044122Abstract: Disclosed are a system and a method for statistically predicting an interaction probability between proteins, and more particularly to a system and a method for predicting an interaction probability between an unknown protein pair based on information obtained by analyzing differences between interacting and non-interacting sets of protein pairs from the view point of domain combination. The prediction method includes the steps of (a) obtaining appearance frequency information of a designated domain combination selected from each of interacting and non-interacting sets of protein pairs, and storing the obtained appearance frequency information, (b) determining a probability equation applied to predict the interaction between two proteins using the stored appearance frequency information of the domain combination, and (c) obtaining an interaction probability value between the two proteins from the determined probability equation.Type: ApplicationFiled: February 5, 2004Publication date: February 24, 2005Applicant: Information And Communications University Educational FoundationInventors: Dong-Soo Han, Hong-Soog Kim, Jung-Min Seo, Woo-Hyuk Jang
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Apparatus and method for generating and verifying ID-based blind signature by using bilinear parings
Publication number: 20050005125Abstract: In an apparatus and a method for generating and verifying an identity based blind signature by using bilinear parings, a trust authority generates system parameters and selects a master key. Further, the trust authority generates a private key by using a signer's identity and the master key. The signer computes a commitment and sends the commitment to the user. The user blinds a message and sends the blinded message to the signer. The signer signs the blinded message and sends the signed message to the user. Thereafter, the user unblinds the signed message and then verifies the signature.Type: ApplicationFiled: December 2, 2003Publication date: January 6, 2005Applicant: Information and Communications University Educational FoundationInventors: Fangguo Zhang, Kwangjo Kim, Hyunggi Choi -
Publication number: 20050005126Abstract: In a method and an apparatus for generating and verifying an identity based proxy signature by using bilinear pairings, a trust authority generates system parameters and selects a master key. Further, the trust authority generates private keys of an original signer and proxy signer based on the original signer's identity and the proxy signer's identity, respectively. The original signer generates a signed warrant, computes values for verifying the signature of the signed warrant and then transfers the signed warrant and the values to the proxy signer. Thereafter, the proxy signer verifies the signature of the signed warrant and then generates a proxy signature key. Finally, the proxy signer signs a delegated message and the verifier verifies the proxy signature.Type: ApplicationFiled: December 30, 2003Publication date: January 6, 2005Applicant: Information and Communications University Educational FoundationInventors: Fangguo Zhang, Kwangjo Kim, Hyunggi Choi
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Publication number: 20050001691Abstract: In a wideband variable frequency voltage controlled oscillator, an LC resonance circuit determines an oscillation frequency based on an externally inputted voltage signal. A negative resistance generating circuit generates a signal having the oscillation frequency determined by the LC resonance circuit. A buffer circuit transfers the oscillation frequency generated by the negative resistance generating circuit to a load. A variable capacitor connecting circuit connects the negative resistance generating circuit and the buffer circuit to transfer the signal having the oscillation frequency from the negative resistance generating circuit to the buffer circuit.Type: ApplicationFiled: January 13, 2004Publication date: January 6, 2005Applicant: Information and Communications University Educational FoundationInventors: Yong Kim, Chul Park
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Publication number: 20040227577Abstract: An adaptive bias circuit is provided for an amplifier module including a RF power amplifier for amplifying an input signal to generate an output signal, wherein the bias circuit receives the input signal to adjust a driving current to control a quiescent current of the RF power amplifier. The adaptive bias circuit includes means for providing the driving current to the bias circuit and means for drawing a bypass current from the providing means to reduce the driving current in response to the input signal, wherein the quiescent current is reduced when the driving current is reduced and the bypass current increases when the input signal is reduced.Type: ApplicationFiled: January 22, 2004Publication date: November 18, 2004Applicant: Information and Communications University Educational FoundationInventors: Youn Sub Noh, Chul Soon Park
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Patent number: 6803822Abstract: A power amplifier for use in a mobile handset includes an amplifying transistor for generating an output of the mobile handset, a bias circuit having a bias transistor and providing a bias current to bias the amplifying transistor, and a bias current control circuit, responsive to a control signal, for adjusting the bias current to control an operation current of the amplifying transistor. The control signal is generated by the mobile handset, and the control signal is determined by a power level of the output of the mobile handset.Type: GrantFiled: March 14, 2003Date of Patent: October 12, 2004Assignee: Information and Communications University Educational FoundationInventors: Ji Hoon Kim, Youn Sub Noh, Chul Soon Park, Joon Hyung Kim
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Publication number: 20040189398Abstract: A power amplifier for use in a mobile handset includes an amplifying transistor, a bias circuit including a bias transistor, the bias circuit providing a bias current to bias the amplifying transistor, and a bias current control circuit, responsive to fluctuation in a reference voltage and variation in temperature, for adjusting the bias current to control an operation current of the amplifying transistor.Type: ApplicationFiled: March 24, 2004Publication date: September 30, 2004Applicant: Information and Communications University Educational FoundationInventors: Youn Sub Noh, Chul Soon Park
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Publication number: 20040186999Abstract: A fingerprints embedment system employing an anonymous fingerprinting method using a bilinear Diffie-Hellman problem includes three participants, introduces system parameters and generates a public key and a secret key of each of the first and the second participant. The anonymous fingerprinting method registers information on the first participant to a third participant based on the system parameters and the public and the secret key of the first participant, wherein the third participant issues a certificate based on the information of the first participant and authenticates a fairness of the first participant based on the certificate.Type: ApplicationFiled: December 4, 2003Publication date: September 23, 2004Applicant: Information And Communications University Educational FoundationInventors: Myungsun Kim, Kwangjo Kim
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Apparatus and method for generating and verifying ID-based blind signature by using bilinear parings
Publication number: 20040139029Abstract: In an apparatus and a method for generating and verifying an identity based blind signature by using bilinear parings, a trust authority generates system parameters and selects a master key. Further, the trust authority generates a private key by using a signer's identity and the master key. The signer computes a commitment and sends the commitment to the user. The user blinds a message and sends the blinded message to the signer. The signer signs the blinded message and sends the signed message to the user. Thereafter, the user unblinds the signed message and then verifies the signature.Type: ApplicationFiled: November 4, 2003Publication date: July 15, 2004Applicant: Information And Communications University Educational FoundationInventors: Fangguo Zhang, Kwangjo Kim