Patents by Inventor Mohammad S. Sharawi

Mohammad S. Sharawi 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).

  • Patent number: 11417965
    Abstract: An antenna system, an apparatus, and a method for configuring an antenna system are provided. The antenna system includes a dielectric substrate. The dielectric substrate has a top surface and a bottom surface. The antenna system also includes a first planar inverted-F antenna (PIFA) radiating element and a second PIFA radiating element disposed on the top surface of the dielectric substrate, each of the PIFA radiating elements having a F-head portion. The antenna system also includes at least two defected ground structures (DGSs) disposed on the bottom surface of the dielectric substrate and configured to provide isolation between the first and the second PIFA radiating element. Each DGS includes a varactor diode. The antenna system also includes a bias circuit corresponding to each of the at least two DGSs.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: August 16, 2022
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Mohammad S. Sharawi, Rifaqat Hussain
  • Patent number: 11412952
    Abstract: A low complexity, low powered, non-invasive, and wearable system for detecting pulmonary edema and emphysema by estimating an average dielectric constant includes a radio frequency (RF) sensor array, which is fabricated along a flexible substrate, a data collection unit, a body area network (BAN), and a post-processing unit. The flexibility of the flexible substrate allows the RF sensor array to worn around the chest region. A plurality of ports of the RF sensor array is used to measure a set of transmission coefficients. The data collection unit accumulates and transfers the set of transmission coefficients to the post-processing unit, wherein the BAN is used during the transfer process. At the post-processing unit, the average dielectric constant is estimated. Since the average dielectric constant can be used as a measure of fluids and air within the lungs, pulmonary edema and emphysema may be detected using the average dielectric constant.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: August 16, 2022
    Assignees: King Fahd University of Petroleum and Minerals, King Abdullah University of Science and Technology
    Inventors: Mohammad S. Sharawi, Muhammad Tayyab, Atif Shamim, Abdelsalam Al-Sarkhi
  • Patent number: 11411322
    Abstract: Aspects of the disclosure provide an antenna system. The antenna system can include a dielectric substrate that has a top surface and a bottom surface covered by a ground plane, and four identical antenna elements symmetrically distributed on each corner of the bottom surface. Each antenna element can have a concentric-pentagonal-slot-based structure that is etched out of the ground plane, and includes an outer pentagonal slot and an inner pentagonal slot. Each side of the outer pentagonal slot can be parallel with a corresponding side of the inner pentagonal slot.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: August 9, 2022
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Mohammad S. Sharawi, Rifaqat Hussain
  • Publication number: 20210121095
    Abstract: A low complexity, low powered, non-invasive, and wearable system for detecting pulmonary edema and emphysema by estimating an average dielectric constant includes a radio frequency (RF) sensor array, which is fabricated along a flexible substrate, a data collection unit, a body area network (BAN), and a post-processing unit. The flexibility of the flexible substrate allows the RF sensor array to worn around the chest region. A plurality of ports of the RF sensor array is used to measure a set of transmission coefficients. The data collection unit accumulates and transfers the set of transmission coefficients to the post-processing unit, wherein the BAN is used during the transfer process. At the post-processing unit, the average dielectric constant is estimated. Since the average dielectric constant can be used as a measure of fluids and air within the lungs, pulmonary edema and emphysema may be detected using the average dielectric constant.
    Type: Application
    Filed: December 9, 2019
    Publication date: April 29, 2021
    Applicants: King Fahd University of Petroleum and Minersls, King Abdullah University of Science and Technology
    Inventors: Mohammad S. Sharawi, Muhammad Tayyab, Atif Shamim, Abdelsalam Al-Sarkhi
  • Publication number: 20210013629
    Abstract: An orthogonally polarized Yagi-like MIMO antenna system and a triangular printed wideband Yagi based MIMO antenna system, respectively, and methods for making the antennas. The orthogonally polarized Yagi-like MIMO antenna system includes two slot round loop elements on a top side of a substrate. Each slot round loop element has two input ports and two slot reflectors. For each slot round loop element, one of the two input ports is placed orthogonally to the other input port, and one of the two slot reflectors is placed orthogonally to the other slot reflector. The triangular printed wideband Yagi based MIMO antenna system includes three round loop elements on a top side of a substrate and a circular reflector on a bottom side of the substrate. Each of the three round loop elements is placed at 120° with respect to other two round loop elements and has three parasitic directors.
    Type: Application
    Filed: July 12, 2019
    Publication date: January 14, 2021
    Applicant: King Fahd University of Petroleum and Minerals
    Inventors: Mohammad S. SHARAWI, Syed Shahan JEHANGIR
  • Patent number: 10892562
    Abstract: An orthogonally polarized Yagi-like MIMO antenna system and a triangular printed wideband Yagi based MIMO antenna system, respectively, and methods for making the antennas. The orthogonally polarized Yagi-like MIMO antenna system includes two slot round loop elements on a top side of a substrate. Each slot round loop element has two input ports and two slot reflectors. For each slot round loop element, one of the two input ports is placed orthogonally to the other input port, and one of the two slot reflectors is placed orthogonally to the other slot reflector. The triangular printed wideband Yagi based MIMO antenna system includes three round loop elements on a top side of a substrate and a circular reflector on a bottom side of the substrate. Each of the three round loop elements is placed at 120° with respect to other two round loop elements and has three parasitic directors.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: January 12, 2021
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Mohammad S. Sharawi, Syed Shahan Jehangir
  • Patent number: 10847885
    Abstract: A miniature antenna device includes a dielectric substrate having an upper side and an opposing lower side and at least one antenna element. The antenna element includes a first half-loop conductor strip disposed on the upper side of the substrate and a second half-loop conductor strip disposed on the lower side of the substrate. The first and second half-loop conductor strips are aligned complementarily one with the other to have a common center of curvature that is void of a ground plane. The antenna element further includes a director element disposed on the upper side of the substrate and spanning the first and second half-loop conductor strips, an input terminal disposed on the upper side of the substrate being electrically coupled to the first half-loop conductor strip, and a ground plane disposed on the lower side of the substrate being electrically coupled to the second half-loop conductor strip.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: November 24, 2020
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Mohammad S. Sharawi, Syed Shahan Jehangir
  • Patent number: 10847870
    Abstract: A dielectric substrate for a configurable antenna has an upper surface and an opposing lower surface. An upper conductor patch is disposed on the upper surface of the substrate and a lower conductor patch is disposed on the lower surface of the substrate. A sensing antenna is formed in the upper conductor patch. An upper set of slot antennas is formed in the upper conductor patch and a lower set of slot antennas is formed in the lower conductor patch. Each of the slot antennas is loaded with a variable reactance component.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: November 24, 2020
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Mohammad S. Sharawi, Rifaqat Hussain
  • Patent number: 10833406
    Abstract: A dielectric resonator antenna array system includes a first array of a plurality of dielectric resonator antennas arranged in a first orientation and that forms a first beam, and a second array of a plurality of dielectric resonator antennas arranged in a second orientation, that is different from the first orientation, and that forms a second beam. Further, a dielectric resonator antenna array system includes a first array of a first type of plurality of dielectric resonator antennas arranged in a predetermined orientation and that forms a first beam, and a second array of a second type of plurality of dielectric resonator antennas arranged in the predetermined orientation and that forms a second beam.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: November 10, 2020
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Mohammad S. Sharawi, Ali Tawfiq Alreshaid, Mohamed Tammam Hussein
  • Patent number: 10826176
    Abstract: A dielectric resonator antenna array system includes a first array of a plurality of dielectric resonator antennas arranged in a first orientation and that forms a first beam, and a second array of a plurality of dielectric resonator antennas arranged in a second orientation, that is different from the first orientation, and that forms a second beam. Further, a dielectric resonator antenna array system includes a first array of a first type of plurality of dielectric resonator antennas arranged in a predetermined orientation and that forms a first beam, and a second array of a second type of plurality of dielectric resonator antennas arranged in the predetermined orientation and that forms a second beam.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: November 3, 2020
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Mohammad S. Sharawi, Ali Tawfiq Alreshaid, Mohamed Tammam Hussein
  • Patent number: 10547107
    Abstract: A low profile, 4-element, slot-based, frequency reconfigurable MIMO antenna for cognitive radio (CR) platforms for cellular communication front ends. The antenna is on a board having a top layer substrate and a bottom layer ground plane. The bottom layer ground plane contains four antenna elements, each antenna element having a circular slot and an annular slot spaced outwardly from and extending circumferentially around the circular slot. The bottom layer contains a microstrip feed-line for each antenna element. Varactor diodes on the top layer span the width of each annular slot to tune the resonance frequency over a wide operation band. The antenna covers a wide frequency band from 1800 MHz to 2450 MHz and supports several well-known wireless standards bands, including GSM1800, LTE, UMTS and WLAN, as well as many others.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: January 28, 2020
    Assignee: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: Rifaqat Hussain, Mohammad S Sharawi
  • Publication number: 20190379135
    Abstract: Aspects of the disclosure provide an antenna system. The antenna system can include a dielectric substrate that has a top surface and a bottom surface covered by a ground plane, and four identical antenna elements symmetrically distributed on each corner of the bottom surface. Each antenna element can have a concentric-pentagonal-slot-based structure that is etched out of the ground plane, and includes an outer pentagonal slot and an inner pentagonal slot. Each side of the outer pentagonal slot can be parallel with a corresponding side of the inner pentagonal slot.
    Type: Application
    Filed: June 7, 2018
    Publication date: December 12, 2019
    Applicant: King Fahd University of Petroleum and Minerals
    Inventors: Mohammad S. SHARAWI, Rifaqat HUSSAIN
  • Publication number: 20190372241
    Abstract: An antenna system, an apparatus, and a method for configuring an antenna system are provided. The antenna system includes a dielectric substrate. The dielectric substrate has a top surface and a bottom surface. The antenna system also includes a first planar inverted-F antenna (PIFA) radiating element and a second PIFA radiating element disposed on the top surface of the dielectric substrate, each of the PIFA radiating elements having a F-head portion. The antenna system also includes at least two defected ground structures (DGSs) disposed on the bottom surface of the dielectric substrate and configured to provide isolation between the first and the second PIFA radiating element. Each DGS includes a varactor diode. The antenna system also includes a bias circuit corresponding to each of the at least two DGSs.
    Type: Application
    Filed: June 5, 2018
    Publication date: December 5, 2019
    Applicant: King Fahd University of Petroleum and Minerals
    Inventors: Mohammad S. Sharawi, Rifaqat Hussain
  • Publication number: 20190372226
    Abstract: A miniature antenna device includes a dielectric substrate having an upper side and an opposing lower side and at least one antenna element. The antenna element includes a first half-loop conductor strip disposed on the upper side of the substrate and a second half-loop conductor strip disposed on the lower side of the substrate. The first and second half-loop conductor strips are aligned complementarily one with the other to have a common center of curvature that is void of a ground plane. The antenna element further includes a director element disposed on the upper side of the substrate and spanning the first and second half-loop conductor strips, an input terminal disposed on the upper side of the substrate being electrically coupled to the first half-loop conductor strip, and a ground plane disposed on the lower side of the substrate being electrically coupled to the second half-loop conductor strip.
    Type: Application
    Filed: June 5, 2018
    Publication date: December 5, 2019
    Applicant: King Fahd University of Petroleum and Minerals
    Inventors: Mohammad S. Sharawi, Syed Shahan Jehangir
  • Publication number: 20190372200
    Abstract: A dielectric substrate for a configurable antenna has an upper surface and an opposing lower surface. An upper conductor patch is disposed on the upper surface of the substrate and a lower conductor patch is disposed on the lower surface of the substrate. A sensing antenna is formed in the upper conductor patch. An upper set of slot antennas is formed in the upper conductor patch and a lower set of slot antennas is formed in the lower conductor patch. Each of the slot antennas is loaded with a variable reactance component.
    Type: Application
    Filed: June 1, 2018
    Publication date: December 5, 2019
    Applicant: King Fahd University of Petroleum and Minerals
    Inventors: Mohammad S. SHARAWI, Rifaqat HUSSAIN
  • Publication number: 20190305423
    Abstract: A low profile, 4-element, slot-based, frequency reconfigurable MIMO antenna for cognitive radio (CR) platforms for cellular communication front ends. The antenna is on a board having a top layer substrate and a bottom layer ground plane. The bottom layer ground plane contains four antenna elements, each antenna element having a circular slot and an annular slot spaced outwardly from and extending circumferentially around the circular slot. The bottom layer contains a microstrip feed-line for each antenna element. Varactor diodes on the top layer span the width of each annular slot to tune the resonance frequency over a wide operation band. The antenna covers a wide frequency band from 1800 MHz to 2450 MHz and supports several well-known wireless standards bands, including GSM1800, LTE, UMTS and WLAN, as well as many others.
    Type: Application
    Filed: March 28, 2018
    Publication date: October 3, 2019
    Inventors: Rifaqat Hussain, Mohammad S Sharawi
  • Publication number: 20190305415
    Abstract: A compact, low profile integrated antenna design covering both 4G and 5G applications with good performance and that fits in handheld mobile terminals. The antenna design is a PIFA-based MIMO antenna system for 4G standards integrated with a planar connected array (PCA) for 5G bands. The antenna is fabricated on a two-layer printed circuit board (PCB) accommodating four antenna elements (3, 4, 5 and 6) along with a planar connected array (9) on a top layer, and a plurality of parallel slots (12) forming a defected ground structure in a bottom layer. The integrated antenna has approximately a typical smart phone backplane size. The plurality of parallel slots behave as a defected ground structure (DGS) for isolation enhancement within the MIMO antenna system band at 2.1 GHz and as a radiator (PCA) for 5G applications at 12.5 GHz.
    Type: Application
    Filed: March 28, 2018
    Publication date: October 3, 2019
    Inventors: Mohammad S. Sharawi, Muhammad Ikram, Rifaqat Hussain
  • Patent number: 10297928
    Abstract: A compact MIMO antenna system having connected arrays supporting multi-bands with multiple configurations. Two low band microwave MIMO antenna arrays operate at frequency bands below 6 GHz, and two high band microwave MIMO antenna arrays operate at frequencies above 10 GHz. The antenna arrays are connected together as connected arrays and support 4G as well as 5G bands. The antenna arrays are carried by an overlying layer of dielectric material and overlie two slots formed as rectangularly shaped closed loop in an underlying ground plane. The low band arrays each have a feeding arm that spans across the slots to act as a single antenna element, and the high band antenna arrays are power combiners/dividers with a single feeding point and four elements forming a two-to-one structure exciting the underlying slots, wherein the slots are excited and shared for compact design and wide operating bandwidth.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: May 21, 2019
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Mohammad S Sharawi, Muhammad Ikram
  • Patent number: 10256549
    Abstract: A compact, low profile, Yagi-based MIMO antenna for small form factor devices including mobile phones and other compact wireless devices. The antenna has a dielectric substrate and an electrically conductive ground plane that acts as a reflector. A driven element and director are on the substrate. In one embodiment, the driven element is an arcuate semi-loop connected to meandered legs and the director element is arcuate, both printed on the substrate. In another embodiment, the driven element is a semi-loop and the director is rectangular, both etched from the ground plane. In both embodiments, a transmission line conveys RF power to the antenna to excite the driven element. Two of the antennas can be mounted side-by-side on a substrate to form a dual-antenna system, and two of the antenna systems can be placed in a tablet or the like.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: April 9, 2019
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Mohammad S Sharawi, Syed S Jehangir
  • Publication number: 20180342801
    Abstract: A dielectric resonator antenna array system includes a first array of a plurality of dielectric resonator antennas arranged in a first orientation and that forms a first beam, and a second array of a plurality of dielectric resonator antennas arranged in a second orientation, that is different from the first orientation, and that forms a second beam. Further, a dielectric resonator antenna array system includes a first array of a first type of plurality of dielectric resonator antennas arranged in a predetermined orientation and that forms a first beam, and a second array of a second type of plurality of dielectric resonator antennas arranged in the predetermined orientation and that forms a second beam.
    Type: Application
    Filed: July 13, 2018
    Publication date: November 29, 2018
    Applicant: King Fahd University of Petroleum and Minerals
    Inventors: Mohammad S. Sharawi, Ali Tawfiq Alreshaid, Mohamed Tammam Hussein