Results 91 to 100 of about 29,451 (299)
High Rate/Low Complexity Space-Time Block Codes for 2x2 Reconfigurable MIMO Systems
, 2015 In this paper, we propose a full-rate full-diversity space-time block code (STBC) for 2x2 reconfigurable multiple-input multiple-output (MIMO) systems that require a low complexity maximum likelihood (ML) detector. We consider a transmitter equipped with
Hua, Yingbo +3 more
core
Full-Duplex Systems Using Multi-Reconfigurable Antennas
, 2014 Full-duplex systems are expected to achieve 100% rate improvement over half-duplex systems if the self-interference signal can be significantly mitigated. In this paper, we propose the first full-duplex system utilizing Multi-Reconfigurable Antenna (MRA)
Ahmed, Elsayed +3 more
core +1 more source
Decoupling Dynamics and Crosslink Stability in Supramolecular Hydrogels Using Associative Exchange
Advanced Materials, EarlyView.How does reorganization impact the stability of supramolecular hydrogels? In contrast to dissociative crosslink exchange, implementing associative exchange in macroscale DNA hydrogels enables decoupling of reorganization dynamics from thermal and mechanical stability.
Pierre Le Bourdonnec +4 more
wiley +1 more source
AIP AdvancesA frequency and beam reconfigurable antenna based on encoded reflectors for Wi-Fi and IoT applications is proposed in this paper. By modifying the traditional Alford antenna, extending the transmission line, adding radiation arms, and loading PIN diodes,
Ziyi Jiao, Yutong Zhao
doaj +1 more source
Metamaterial Antennas Enhance MRI of the Eye and Occipital Brain
Advanced Materials, EarlyView.A radiofrequency antenna platform comprising planar and bend configurations is developed, incorporating structurally integrated epsilon‐negative metamaterial unit cells to enhance MRI. These antennas enable high‐resolution in vivo human MRI of the eye, orbit, and occipital brain. Comprehensive validation, including simulations, phantom experiments, SAR,
Nandita Saha +14 more
wiley +1 more source
Frequency-Reconfigurable Antenna Using Metasurface
IEEE Transactions on Antennas and Propagation, 2014 A frequency-reconfigurable antenna designed using metasurface (MS) to operate at around 5 GHz is proposed and studied. The frequency-reconfigurable metasurfaced (FRMS) antenna is composed of a simple circular patch antenna and a circular MS with the same diameter of 40 mm (0.67 λ) and implemented using planar technology.
Zhu, HL, Liu, XH, Yuk, TTI, Cheung, SW
openaire +3 more sources
Liquid Metal Microrobots for Magnetically Guided Transvascular Navigation
Advanced Materials, EarlyView.Liquid metal‐based microrobots combine magnetic steering, intrinsic X‐ray visibility and softness, to navigate blood vessels even against flow. Under clinically relevant magnetic fields, liquid metal microrobots roll along vessel walls, cross endothelial barriers, and accumulate in target tissues.
Xiaohui Ju +7 more
wiley +1 more source
Electronically Tunable Antenna Pair and Novel RF Front-End Architecture for Software-Defined Radios
EURASIP Journal on Advances in Signal Processing, 2005 This paper proposes a novel RF front-end architecture for software-defined radios (SDRs) based on an electronically tunable antenna pair controlled by an antenna control unit (ACU) consisting of field effect transistor (FET) switches and a field ...
Oh Sung-Hoon +5 more
doaj +1 more source
RHOMBUS SHAPED RECONFIGURABLE MICROSTRIP ANTENNA FOR CDMA WIRELESS APPLICATIONS [PDF]
ICTACT Journal on Communication Technology, 2015 Rhombus Shaped Reconfigurable microstrip antenna is designed to operate at 1.74GHz. The proposed antenna is a Rhombus shaped microstrip antenna which gives a good size reduction with good impedance bandwidth in terms of with and without capacitor.
K. Madhusudhana, S. Jagadeesha
doaj
High-Rate Space Coding for Reconfigurable 2x2 Millimeter-Wave MIMO Systems
, 2015 Millimeter-wave links are of a line-of-sight nature. Hence, multiple-input multiple-output (MIMO) systems operating in the millimeter-wave band may not achieve full spatial diversity or multiplexing.
Hua, Yingbo +3 more
core