Results 211 to 220 of about 9,192 (258)
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Ultrasonic transducer interface-circuit for simultaneous transmitting and receiving
2009 9th International Conference on Electronic Measurement & Instruments, 2009In some single transducer ultrasound applications it is useful to be able to receive echo signals during transmitting. Thereby it's possible to measure short distances of nearby obstacles. However only a few solutions for this problem are described in the literature and none is known to be used in an industrial application.
Andreas Schroder +1 more
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Simultaneous Transmit and Receive (STAR): Circulators Versus Nonreciprocal Antennas
2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, 2019Desired antenna and front-end for simultaneous transmit and receive systems in addition to nonlinear and/or time variant nonreciprocal antennas are reviewed. The STAR system requirements in terms of antennas and front-end are investigated. Then, the properties of some proposed techniques for nonreciprocal antennas and circulator-based systems are ...
Pedram Loghmannia, Majid Manteghi
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A dipole antenna system for simultaneous transmit and receive
2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2015A design of a 3-element simultaneous transmit and receive (STAR) antenna system is presented. The transmitter is an array of two equal-phase collinear half wavelength dipoles positioned such to create 180° near-field phase difference at the receiver's location.
Elie G. Tianang, Dejan S. Filipovic
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Multioctave antenna array for simultaneous transmit and receive applications
2018 International Applied Computational Electromagnetics Society Symposium (ACES), 2018This paper presents the design and performance of a high-isolation, wideband, and monostatic simultaneous transmit and receive (STAR) antenna system. The proposed configuration is composed of four dual-polarized conical sinuous antennas sequentially rotated and fed using two 2×4 Butler matrix beamforming networks; one for transmitting (TX) and the ...
Mohamed A. Elmansouri +2 more
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RF Coupling Suppression Circuit for Simultaneous Transmit and Receive Systems
2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, 2020Wireless technology is growing at a fast rate to accommodate the expanding user demands. Currently the radio frequency (RF) spectrum is highly congested and more susceptible to signal fratricide and interference. Therefore, full duplexing techniques are required to enhance the access to the spectrum.
Md Nurul Anwar Tarek +2 more
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Antenna Systems for Simultaneous Transmit and Receive (STAR) Applications
International Symposium on Microelectronics, 2017Abstract Several novel wideband co-polarized circulator-less monostatic antenna and array designs for co-channel simultaneous transmit and receive (STAR) applications are presented. The monostatic STAR apertures are demonstrated first by utilizing multi-arm spiral antennas where a set of arms is used for transmitting (TX) and the other ...
Ehab A. Etellisi +2 more
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Simultaneous transmit and receive based on phase-only digital beamforming
2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC), 2021Traditional simultaneous transmit and receive mainly focuses on element-level antenna configurations in wireless communication. This paper takes large antenna array as research object, focusing on achieving high transmit-receive isolation in aperture-level simultaneous transmit and receive.
Jian Qiu, Yuan Yao, Guangxin Wu
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Enabling Simultaneous Transmit and Receive with Optical Interference Cancellation
2019 IEEE Research and Applications of Photonics in Defense Conference (RAPID), 2019We demonstrate an optical filter to cancel 20 dB of various multipath self-interference components over a multioctave 600 MHz band centered around 400 MHz. This enables significant gains in transceiver effectiveness by enabling Simultaneous Transmit and Receive (STAR).
Thien-An Nguyen +2 more
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A Concurrently Dual-Polarized, Simultaneous Transmit and Receive (STAR) Antenna
IEEE Transactions on Antennas and Propagation, 2020A concurrently dual-polarized, simultaneous transmit and receive (STAR) antenna system with high transmit (TX)-receive (RX) isolation is presented. The STAR antenna consists of four dual-polarized patches, two for TX and two for RX. The radiators are fed using a network consisting of four 90° hybrids and four 180° hybrids.
Mohammad Ranjbar Nikkhah +3 more
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Same-Frequency Simultaneous Transmit and Receive for Full-Duplex Applications
2021 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC), 2021Broadband radio-frequency (RF) communications systems need to transmit and receive signals simultaneously, a capability called full duplex. To date, most full duplex systems leverage components that route signals at a bi-directional port to/from either one RF port or a second RF port based on the frequency bands of the signals.
Edward I. Ackerman, Charles H. Cox
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