Patents by Inventor Sorwar Hossain
Sorwar Hossain 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: 9838061Abstract: An electronic communications device includes a radio frequency (RF) transceiver, an RF antenna, a millimeter wave (mmW) antenna and a processor. The RF antenna has dielectric-object proximity-sensing capability. The processor is a) coupled to the RF antenna to receive capacitance variation signals from the RF antenna; b) coupled to the mmW antenna to receive distance to the object signals from the mmW antenna; and c) coupled to the RF transceiver to produce power reduction signals to the RF transceiver.Type: GrantFiled: November 11, 2016Date of Patent: December 5, 2017Assignee: LENOVO (SINGAPORE) PTE. LTD.Inventor: MdGolam Sorwar Hossain
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Patent number: 9368860Abstract: A patch antenna includes a ground electrode arranged on one surface of a dielectric layer, a first patch which has a shape of a trapezoid, is arranged inside the dielectric layer and radiates a signal having a first frequency, a second patch which has a shape of a trapezoid, is arranged on the other surface of the dielectric layer and radiates a signal having a second frequency, and two conductors which connect the short sides of the two patches with the ground electrode. The two patches are arranged such that the short sides are both located on the side of the same end of the dielectric layer. The first patch is fed power via a feeding point near the short side, and the second patch is fed power via a feeding point which is located between the end of the dielectric layer and the short side of the first patch.Type: GrantFiled: January 9, 2014Date of Patent: June 14, 2016Assignee: FUJITSU LIMITEDInventor: Md.Golam.Sorwar Hossain
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Publication number: 20140197994Abstract: A patch antenna includes a ground electrode arranged on one surface of a dielectric layer, a first patch which has a shape of a trapezoid, is arranged inside the dielectric layer and radiates a signal having a first frequency, a second patch which has a shape of a trapezoid, is arranged on the other surface of the dielectric layer and radiates a signal having a second frequency, and two conductors which connect the short sides of the two patches with the ground electrode. The two patches are arranged such that the short sides are both located on the side of the same end of the dielectric layer. The first patch is fed power via a feeding point near the short side, and the second patch is fed power via a feeding point which is located between the end of the dielectric layer and the short side of the first patch.Type: ApplicationFiled: January 9, 2014Publication date: July 17, 2014Applicant: FUJITSU LIMITEDInventor: Md.Golam.Sorwar HOSSAIN
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Patent number: 8552916Abstract: An antenna includes a first arm whose one end is connected to a feeding unit, a second arm whose one end is connected to the first arm at a position that is away from the one end of the first arm and whose other end is connected to ground, and a variable impedance unit whose impedance is variable, provided between the ground and the other end of the first arm.Type: GrantFiled: September 24, 2010Date of Patent: October 8, 2013Assignee: Fujitsu LimitedInventors: Md. Golam. Sorwar Hossain, Takashi Yamagajo
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Patent number: 8217841Abstract: There is provided an antenna for tuning a resonant frequency. The antenna includes a first and a second arms connected to the antenna feeding portion at a common end thereof. The second arm has each of the plurality of branches including a switch for selecting a length of an electrical loop formed by the second arm and an end of a ground plane, each of the switches is connected to the ground plane. A first resonant frequency performed by the first arm is higher than a second resonant frequency by the second arm when each of the switches is open, and the first resonant frequency is lower than a third resonant frequency by the second arm when one of the switches is selected to connect the second arm and the ground plane so that the length of the electrical loop is maximum.Type: GrantFiled: January 29, 2010Date of Patent: July 10, 2012Assignee: Fujitsu LimitedInventors: Golam Sorwar Hossain, Takashi Yamagajo
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Publication number: 20110279348Abstract: An antenna device includes an antenna element having an external form shaped into a substantially rectangular-shaped planar spiral coil and a switch provided to the antenna element.Type: ApplicationFiled: March 31, 2011Publication date: November 17, 2011Applicant: FUJITSU LIMITEDInventors: Golam Sorwar HOSSAIN, Takashi Yamagajo
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Patent number: 8009104Abstract: A single-layer adaptive plane array antenna device includes a variable reactance circuit including a variable capacitance circuit controlled by bias voltage, a resonating folded line bias circuit having an AC grounding node for supplying the bias voltage to the variable capacitance circuit, for transmitting the bias voltage to the variable capacitance circuit including a thin line interconnecting spacer for transmitting the bias voltage to the variable capacitance circuit side and first and second open folded stubs each of which is connected to the thin line interconnecting spacer, each of which is also disposed in parallel with a longitudinal direction of each other in a prescribed small gap with the thin-line interconnecting spacer, each of which has a folded shape and each of which functions as an inductance element and a capacitance element respectively for separating the variable capacitance circuit from the AC grounding node.Type: GrantFiled: March 13, 2009Date of Patent: August 30, 2011Assignee: Fujitsu LimitedInventor: Golam Sorwar Hossain
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Publication number: 20110128200Abstract: An antenna includes a first arm whose one end is connected to a feeding unit, a second arm whose one end is connected to the first arm at a position that is away from the one end of the first arm and whose other end is connected to ground, and a variable impedance unit whose impedance is variable, provided between the ground and the other end of the first arm.Type: ApplicationFiled: September 24, 2010Publication date: June 2, 2011Applicant: FUJITSU LIMITEDInventors: Md. Golam. Sorwar Hossain, Takashi Yamagajo
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Publication number: 20100245201Abstract: There is provided an antenna for tuning a resonant frequency. The antenna includes a first and a second arms connected to the antenna feeding portion at a common end thereof. The second arm has each of the plurality of branches including a switch for selecting a length of an electrical loop formed by the second arm and an end of a ground plane, each of the switches is connected to the ground plane. A first resonant frequency performed by the first arm is higher than a second resonant frequency by the second arm when each of the switches is open, and the first resonant frequency is lower than a third resonant frequency by the second arm when one of the switches is selected to connect the second arm and the ground plane so that the length of the electrical loop is maximum.Type: ApplicationFiled: January 29, 2010Publication date: September 30, 2010Applicant: FUJITSU LIMITEDInventors: Golam Sorwar Hossain, Takashi Yamagajo
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Publication number: 20100188169Abstract: A reactance varying device comprises a voltage-controlled variable-capacitance circuit, a biasing circuit and an impedance transformer. The biasing circuit has a virtual AC ground node, which acts as a gateway to supply a bias voltage to the variable-capacitance circuit. The impedance transformer separates the variable-capacitance circuit from the AC ground node, as well as provides an inductive element to form a reactance varying LC tank.Type: ApplicationFiled: August 7, 2007Publication date: July 29, 2010Applicant: FUJITSU LIMITEDInventors: Sorwar Hossain, Yasuyuki Oishi
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Publication number: 20100080165Abstract: An apparatus performing wireless communication with a group of a plurality of base station antennas disposed on a wireless base station apparatus side in accordance with a multi-input multi-output wireless communication system includes a group of a plurality of repeater antennas disposed around the body of a user. The apparatus further includes a repeater base apparatus being connected to the group of the repeater antennas, communicating, with a handheld mobile terminal apparatus carried by the user, transmission/reception data in the handheld mobile terminal apparatus in accordance with a short-distance wireless communication system, and communicating, between the group of the plurality of the repeater antennas and the group of the base station antennas, the transmission/reception data in accordance with the multi-input multi-output wireless communication method.Type: ApplicationFiled: September 14, 2009Publication date: April 1, 2010Applicant: FUJITSU LIMITEDInventors: Md. Golam Sorwar Hossain, Toru Maniwa, Shuji Kobayakawa
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Publication number: 20090309799Abstract: A single-layer adaptive plane array antenna device includes a variable reactance circuit including a variable capacitance circuit controlled by bias voltage, a resonating folded line bias circuit having an AC grounding node for supplying the bias voltage to the variable capacitance circuit, for transmitting the bias voltage to the variable capacitance circuit including a thin line interconnecting spacer for transmitting the bias voltage to the variable capacitance circuit side and first and second open folded stubs each of which is connected to the thin line interconnecting spacer, each of which is also disposed in parallel with a longitudinal direction of each other in a prescribed small gap with the thin-line interconnecting spacer, each of which has a folded shape and each of which functions as an inductance element and a capacitance element respectively for separating the variable capacitance circuit from the AC grounding node.Type: ApplicationFiled: March 13, 2009Publication date: December 17, 2009Applicant: FUJITSU LIMITEDInventor: Golam Sorwar Hossain