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Bagher Afshar Phones & Addresses

  • Sammamish, WA
  • Irvine, CA
  • Bellevue, WA
  • San Diego, CA
  • Berkeley, CA

Publications

Us Patents

Switch For Transmit/Receive Mode Selection And Antenna Polarization Diversity

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US Patent:
20130072125, Mar 21, 2013
Filed:
Sep 19, 2011
Appl. No.:
13/236279
Inventors:
Seunghwan Yoon - Costa Mesa CA, US
Bagher Afshar - Irvine CA, US
Jesus Alfonso Castaneda - Los Angeles CA, US
Brima Ibrahim - Laguna Hills CA, US
Michael Boers - Irvine CA, US
Assignee:
Broadcom Corporation - Irvine CA
International Classification:
H04W 24/02
H04B 1/40
H01P 1/10
US Classification:
455 6711, 333101, 455 73
Abstract:
A transceiver circuit includes a transmitter to send communication signals and a receiver to receive communication signals sent by other transmitters. The transceiver circuit also includes a switch to connect the transmitter and the receiver to at least one antenna. The switch controls at least two directions of polarization of the at least one antenna.

Channel Extraction Digital Beamforming

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US Patent:
20230006706, Jan 5, 2023
Filed:
Sep 13, 2022
Appl. No.:
17/944041
Inventors:
- Hawthorne CA, US
Masoud Kahrizi - Irvine CA, US
Alex Ahmad Mirzaei - Tustin CA, US
Bagher Afshar - Irvine CA, US
Ali Sajjadi - Irvine CA, US
Bernd Pregardier - Oceanside CA, US
Ka Shun Carson Pun - Irvine CA, US
Omid Nasiby - Laguna Niguel CA, US
Igor Elgorriaga - Rancho Palos Verdes CA, US
International Classification:
H04B 1/16
H04B 7/08
H04L 7/00
Abstract:
In an embodiment, a receiver included in a communications system includes a channel extractor configured to segregate a received signal into a plurality of channel signals, wherein the plurality of channel signals includes a plurality of data signals; and a plurality of decoders electrically coupled to the channel extractor and configured to decode each of the plurality of channel signals into a respective plurality of decoded data beam portions.

Half Duplex Mode Digital Beamforming Device

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US Patent:
20200388916, Dec 10, 2020
Filed:
May 3, 2020
Appl. No.:
16/865401
Inventors:
- Hawthorne CA, US
Alex Ahmad Mirzaei - Tustin CA, US
Ali Sajjadi - Irvine CA, US
Bagher Afshar - Irvine CA, US
Alireza Mehrnia - Tustin CA, US
Behzad Nourani - Irvine CA, US
Bernd Pregardier - Oceanside CA, US
Assignee:
Space Exploration Technologies Corp. - Hawthorne CA
International Classification:
H01Q 3/36
H01Q 3/26
H04B 3/52
H04B 3/54
H04B 7/06
Abstract:
In an embodiment, a device is included in a communications system, the device including a plurality of antenna elements configured in a phased array antenna; a plurality of integrated circuit (IC) chips, wherein each IC chip of the plurality of IC chips is associated with a respective subset of antenna elements of the plurality of antenna elements, and wherein, for each IC chip of the plurality of IC chips, the associated subset of antenna elements is used for transmitting and receiving radio frequency (RF) signals by the IC chip; and a local oscillator configured to generate a common local oscillator signal and provide the common local oscillator signal to each IC chip of the plurality of IC chips.

Cyclic Staggered Communications Network With Switched Antenna Polarization Diversity

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US Patent:
20180241137, Aug 23, 2018
Filed:
Apr 25, 2018
Appl. No.:
15/962631
Inventors:
- Singapore, SG
Seunghwan Yoon - Irvine CA, US
Bagher Afshar - Irvine CA, US
Saikat Sarkar - Irvine CA, US
Ehsan Adabi Firouzjaei - Newport Beach CA, US
Michael John Inglis Boers - South Turramurra, AU
Jesus Alfonso Castaneda - Los Angeles CA, US
Tirdad Sowlati - Irvine CA, US
Assignee:
Avago Technologies General IP (Singapore) Pte. Ltd . - Singapore
International Classification:
H01Q 21/30
H01Q 3/24
Abstract:
A system and apparatus is provided to reduce signal routing, area and signal loss in double-pole, double-throw (DPDT) switch implementations in wireless and millimeter-wave front ends. A cyclic staggered arrangement of receivers, transmitters and antenna ports connecting with DPDT switches reduce signal cross-over and allow for compact, low-loss multi-antenna configurations.

Reconfigurable 1:N Wilkinson Combiner And Switch

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US Patent:
20170047667, Feb 16, 2017
Filed:
Sep 15, 2015
Appl. No.:
14/854832
Inventors:
- Irvine CA, US
Seunghwan YOON - Irvine CA, US
Bagher AFSHAR - Irvine CA, US
Michael BOERS - South Turramurra, AU
Jesus CASTANEDA - Long Beach CA, US
Tirdad SOWLATI - Irvine CA, US
Assignee:
BROADCOM CORPORATION - Irvine CA
International Classification:
H01Q 23/00
H01Q 3/30
H01Q 3/24
Abstract:
An electronic device includes circuitry configured to determine an antenna operation mode for one or more antenna arrays. The circuitry is further configured to control the one or more antenna arrays to operate in a combined antenna mode via a Wilkinson combiner. The circuitry is also configured to control the one or more antenna arrays to operate in an isolated antenna mode via a single-pole, multi-throw switch.

Scalable Radio Frequency Communication System

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US Patent:
20160150542, May 26, 2016
Filed:
Nov 25, 2015
Appl. No.:
14/952871
Inventors:
- Irvine CA, US
Michael BOERS - Turramurra, AU
Masoud KAHRIZI - Irvine CA, US
Tirdad SOWLATI - Irvine CA, US
Bagher AFSHAR - Irvine CA, US
Payam TORAB JAHROMI - Laguna Niguel CA, US
Sean Timothy NICOLSON - Irvine CA, US
Brima Babatunde IBRAHIM - Laguna Hills CA, US
International Classification:
H04W 72/04
H04W 16/28
Abstract:
A device implementing the subject scalable radio frequency communication system includes one or more primary radio frequency integrated circuits (RFICs) and at least one secondary RFIC. Each of the one or more primary RFICs is configured to receive an intermediate frequency (IF) signal from a baseband processor, upconvert the IF signal to a radio frequency (RF) signal, and transmit the RF signal to one or more secondary RFICs. The secondary RFICs under each of the one or more primary RFICs are configured to receive the RF signal from the corresponding primary RFIC, phase shift and amplify the RF signal, and transmit the RF signal via a plurality of antenna elements.

Staggered Network Based Transmit/Receive Switch With Antenna Polarization Diversity

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US Patent:
20150123873, May 7, 2015
Filed:
Dec 13, 2013
Appl. No.:
14/105406
Inventors:
- Irvine CA, US
Seunghwan Yoon - Irvine CA, US
Bagher Afshar - Irvine CA, US
Saikat Sarkar - Irvine CA, US
Ehsan Adabi Firouzjaei - Newport Beach CA, US
Michael John Inglis Boers - South Turramurra, AU
Jesus Alfonso Castaneda - Los Angeles CA, US
Tirdad Sowlati - Irvine CA, US
International Classification:
H01Q 1/50
US Classification:
343876
Abstract:
A system and apparatus is provided to reduce signal routing, area and signal loss in double-pole, double-throw (DPDT) switch implementations in wireless and millimeter-wave front ends. A staggered arrangement of receivers, transmitters and antenna ports connecting with DPDT switches reduce signal cross-over and allow for compact, low-loss multi-antenna configurations.
Bagher Afshar from Sammamish, WA, age ~42 Get Report