Patents by Inventor Ibrahim Tekin
Ibrahim Tekin 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: 11510867Abstract: A flexible implantable contraceptive disc device is disclosed which can be inserted inside the female body, such as inside the uterus, is disclosed. The disc device can be bent and inserted into a laparoscopy tube, which allows it to be delivered to an appropriate location inside a female subject. The disc device has three layers, a central core silicon reservoir containing an active ingredient, such as a contraceptive progesterone, which is sandwiched and encased by upper and lower porous silicon casings. The casings are porous to the contraceptive, allowing controlled release over a prolonged period of time. The lower casing has a series of micro-hooks around a circumference, allowing the disc device to be attached to a desired tissue by rotating the disc device such that the hooks engage with the desired tissue. Such a device is easier to insert, and to remove, than a rod-like rigid plastic T-shape IUDs which are considerably larger, also and more expensive to manufacture.Type: GrantFiled: August 21, 2017Date of Patent: November 29, 2022Assignee: REPRODUCTIVE MEDICINE AND GYNAECOLOGY ASSOCs. LTDInventors: Mehmet Rafet Gazvani, Halil Ibrahim Tekin
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Patent number: 11329362Abstract: On-chip wireless links offer improved network performance due to long distance communication, additional bandwidth, and broadcasting capabilities of antennas. A Through-Silicon Via (TSV)-based antenna design called TSV_A establishes multi-band wireless communication through the silicon substrate medium with only a 3 dB loss over a 30 mm on-chip distance. Simulation results show an improvement in network latency up to ˜13% (average improvement of ˜7%), energy-delay improvements of ˜34% on average, and an improvement in throughput up to ˜34% (average improvement).Type: GrantFiled: December 18, 2019Date of Patent: May 10, 2022Assignee: Drexel UniversityInventors: Vasil Pano, Ibrahim Tekin, Baris Taskin, Kapil R. Dandekar, Yuqiao Liu
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Patent number: 11081798Abstract: A full-duplex radio system includes a monostatic antenna, digital self-interference cancellation (DSIC) and cyclic prefix noise reduction (CPNR) method and circuitry applying said method suitable for orthogonal frequency division multiplexing (OFDM) based full-duplex wireless communications. Said system, method and circuitry applying said method are implementable within the paradigm of in-band full-duplex (IBFD) monostatic antenna architecture, an embodiment of which comprises a dual-polarized, slot-coupled antenna.Type: GrantFiled: October 8, 2019Date of Patent: August 3, 2021Assignee: SABANCI UNIVERSITESIInventors: Ozgur Gurbuz, Ibrahim Tekin, Mikail Yilan, Hayrettin Ayar
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Publication number: 20210104821Abstract: A full-duplex radio system includes a monostatic antenna, digital self-interference cancellation (DSIC) and cyclic prefix noise reduction (CPNR) method and circuitry applying said method suitable for orthogonal frequency division multiplexing (OFDM) based full-duplex wireless communications. Said system, method and circuitry applying said method are implementable within the paradigm of in-band full-duplex (IBFD) monostatic antenna architecture, an embodiment of which comprises a dual-polarized, slot-coupled antenna.Type: ApplicationFiled: October 8, 2019Publication date: April 8, 2021Applicant: Sabanci UniversitesiInventors: Ozgur Gurbuz, Ibrahim Tekin, Mikail Yilan, Hayrettin Ayar
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Patent number: 10756436Abstract: A system may include a double differential-fed dual-polarized 2.4 GHz, microstrip patch antenna with extremely high interport isolation for shared antenna architecture based in-band full duplex (IBFD) transceivers. The presented antenna configuration is based on four ports linearly polarized single radiating element with differential feeding for both transmit (Tx) and receive (Rx) operation. The double differential feeding using two identical 3 dB/180° ring hybrid couplers with nice amplitude/phase balance effectively suppresses the interport RF leakage to achieve very high isolation. Strong amplitude and phase balance of 3 dB/180° ring hybrid coupler can provide a better SIC performance as compared to DFN based on Wilkinson power divider with un-equal length microstrip lines, thus supplying an elite level of suppression in means of self-interference at Tx.Type: GrantFiled: January 25, 2019Date of Patent: August 25, 2020Assignee: Sabanci UniversitesiInventors: Ibrahim Tekin, Haq Nawaz
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Publication number: 20200212538Abstract: On-chip wireless links offer improved network performance due to long distance communication, additional bandwidth, and broadcasting capabilities of antennas. A Through-Silicon Via (TSV)-based antenna design called TSV_A establishes multi-band wireless communication through the silicon substrate medium with only a 3 dB loss over a 30 mm on-chip distance. Simulation results show an improvement in network latency up to ˜13% (average improvement of ˜7%), energy-delay improvements of ˜34% on average, and an improvement in throughput up to ˜34% (average improvement).Type: ApplicationFiled: December 18, 2019Publication date: July 2, 2020Applicant: Drexel UniversityInventors: Vasil Pano, Ibrahim Tekin, Baris Taskin, Kapil R. Dandekar, Yuqiao Liu
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Publication number: 20200127379Abstract: A system may include a double differential-fed dual-polarized 2.4 GHz, microstrip patch antenna with extremely high interport isolation for shared antenna architecture based in-band full duplex (IBFD) transceivers. The presented antenna configuration is based on four ports linearly polarized single radiating element with differential feeding for both transmit (Tx) and receive (Rx) operation. The double differential feeding using two identical 3 dB/180° ring hybrid couplers with nice amplitude/phase balance effectively suppresses the interport RF leakage to achieve very high isolation. Strong amplitude and phase balance of 3 dB/180° ring hybrid coupler can provide a better SIC performance as compared to DFN based on Wilkinson power divider with un-equal length microstrip lines, thus supplying an elite level of suppression in means of self-interference at Tx.Type: ApplicationFiled: January 25, 2019Publication date: April 23, 2020Applicant: Sabanci UniversitesiInventors: Ibrahim Tekin, Haq Nawaz
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Publication number: 20190167575Abstract: A flexible implantable contraceptive disc device can be inserted inside the female body. The circular device can be bent and inserted into a laparoscopy tube, which allows it to be delivered to the appropriate location inside a female subject. The disc has three layers, a central core silicon reservoir containing the active ingredient, such as a contraceptive, which is sandwiched and encased by upper and lower porous silicon casings. The casings are porous to the contraceptive, allowing controlled release over a prolonged period of time. The lower casing has a series of micro-hooks around the circumference, allowing the disc device to be attached to a desired tissue by rotating the disc such that the hooks engage with the tissue. Such a device is easier to insert, and to remove, than the rod-like rigid plastic T-shape IUDs which are considerably larger and more expensive to manufacture.Type: ApplicationFiled: August 21, 2017Publication date: June 6, 2019Inventors: Mehmet Rafet GAZVANI, Halil Ibrahim TEKIN
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Publication number: 20120286992Abstract: This invention comprises at least three directional GPS antennas (2) for picking up specific GPS signals conning from at least three GPS satellites (S), at least three RF GPS repeaters (3) for amplifying GPS signals coming from directional GPS antennas (2), at least three GPS antennas (6) for transmitting GPS signals coming from RF GPS repeaters (3) to indoor, at least one GPS receiver (7) for picking up GPS signals coming from GPS antennas (6) by its (7) antenna (8) novel position calculation method (100) and relates to increase the coverage of the outdoors GPS signals to indoors.Type: ApplicationFiled: December 31, 2009Publication date: November 15, 2012Inventors: Ibrahim Tekin, Ayhan Bozkurt, Kerem Ozsoy
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Patent number: 7864870Abstract: The invention relates to a novel ultra wideband (UWB) waveform generator circuit (1) placed on a substrate, with transmission lines, loads and ports; wherein the circuit takes as input a waveform and generates as output the derivative of said waveform, characterised in that it has two microstrip transmission lines (2,3) and that these lines (2,3) are coupled.Type: GrantFiled: June 14, 2006Date of Patent: January 4, 2011Assignee: Sabanci UniversitesiInventor: Ibrahim Tekin
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Publication number: 20070002930Abstract: The invention relates to a novel ultra wideband (UWB) waveform generator circuit (1) placed on a substrate, with transmission lines, loads and ports; wherein the circuit takes as input a waveform and generates as output the derivative of said waveform, characterised in that it has two microstrip transmission lines (2,3) and that these lines (2,3) are coupled.Type: ApplicationFiled: June 14, 2006Publication date: January 4, 2007Inventor: Ibrahim Tekin
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Patent number: 6965760Abstract: A method and apparatus for facilitating detection of satellite signals using a dynamic integration technique in which integration time periods of correlators are adjusted according to signal strength measurements of satellite signals received at GPS receivers. Specifically, integration time periods are inversely adjusted, either proportionally or non-proportionally, to received strengths of signals being searched.Type: GrantFiled: September 7, 1999Date of Patent: November 15, 2005Assignee: Lucent Technologies Inc.Inventors: Byron Hua Chen, Tung Ching Chiang, Ren Da, Ibrahim Tekin
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Patent number: 6658258Abstract: A method and apparatus for estimating the location of a mobile terminal. The method estimates the locations by: a) using at least one forward-link geo-location technique without using any reverse-link geo-location techniques, this being performed when there are enough base stations visible to the mobile terminal to be able to use the forward-link geo-location technique without using any reverse-link geo-location techniques to estimate the location, and b) using at least one reverse-link geo-location technique when there are not enough base stations visible to the mobile terminal to be able to use the forward-link geo-location technique without also concurrently using any reverse-link geo-location techniques to estimate the location. The forward-link geo-location techniques can be used either alone or in combination with each other, and include such known geo-location techniques as a time-difference-of-arrival technique and angle-difference-of-arrival technique.Type: GrantFiled: September 29, 2000Date of Patent: December 2, 2003Assignee: Lucent Technologies Inc.Inventors: Byron Hua Chen, Robert Ellis Richton, Ibrahim Tekin, Giovanni Vannucci
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Patent number: 6587692Abstract: Weighted ridge regression (WRR) processing is applied to three or more distance measurements to determine the location of a terminal. For example, in an integrated satellite-based navigation system/wireless network, the location of a mobile unit can be determined by applying WRR processing to at least three distance measurements, where one or more of the distance measurements are satellite-based distance measurements (e.g., GPS pseudorange measurements) and one or more are wireless network-based distance measurements (e.g., round-trip delay or pilot phase offset measurements). WRR processing provides improved accuracy in the determination of mobile unit position over conventional least mean square techniques.Type: GrantFiled: March 30, 2000Date of Patent: July 1, 2003Assignee: Lucent Technologies Inc.Inventors: Byron H. Chen, Ren Da, Ibrahim Tekin
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Publication number: 20020160787Abstract: A communications system includes at least one mobile station and a plurality of base stations each transmitting a downlink signal to the at least one mobile station substantially asynchronously from one another. Each base station receives an uplink signal from the at least one mobile station responsive to the downlink signal. Further, each base station has a known position and may determine a round trip delay between transmission of the downlink signal and reception of the uplink signal. The communications system may also include a position determiner for determining a position of the at least one mobile station based upon the round trip delays and the known positions of the base stations.Type: ApplicationFiled: March 13, 2001Publication date: October 31, 2002Applicant: Lucent Technologies Inc.Inventors: Byron Hua Chen, Ren Da, Alex Matusevich, Ibrahim Tekin
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Patent number: 6300905Abstract: A location or position of a wireless mobile unit is determined using only measurements from a single base station. A distance between the wireless mobile unit and the base station is calculated utilizing a roundtrip delay value of an RF uplink signal received from a wireless mobile unit. Thereafter, an angle of arrival of the received signal is determined using measurements of the received signal from each of a plurality of antenna sectors of a multi-sector antenna. The angle of arrival is determined based upon stored antenna signal measurements of the multi-sector antenna, wherein a combination of different sector signal measurements corresponds to a single angle measurement. Using the determined distance and angle of arrival, a position or location of a wireless mobile unit can easily be determined using only measurements of the single base station.Type: GrantFiled: October 5, 1999Date of Patent: October 9, 2001Assignee: Lucent Technologies Inc.Inventors: Byron Hua Chen, Tung Ching Chiang, Ibrahim Tekin