Results 61 to 70 of about 57,900 (293)

The Circular Polarization Diversity Antennas Achieved by a Fractal Defected Ground Structure

IEEE Access, 2019
This paper proposes the circularly polarized (CP) antennas with a restored radiation pattern for the polarization diversity applications. The proposed CP antennas have dual polarizations, the left-handed circularly polarized (LHCP) antenna is designed ...
Kun Wei, Bocheng Zhu, Mingliang Tao
doaj   +1 more source

Maximum-SNR Antenna Selection Among a Large Number of Transmit Antennas

IEEE Journal of Selected Topics in Signal Processing, 2014
The recent increased interest in large-scale multiple- input multiple-output systems, combined with the cost of analog radio-frequency (RF) chains, necessitates the use of efficient antenna selection (AS) schemes. Capacity or signal-to-noise ratio (SNR) optimal AS has been considered to require an exhaustive search among all possible antenna subsets ...
Γκιζελη Μαρια(http://users.isc.tuc.gr/~mgizeli), Gizeli Maria(http://users.isc.tuc.gr/~mgizeli), Καρυστινος Γεωργιος(http://users.isc.tuc.gr/~gkarystinos), Karystinos Georgios(http://users.isc.tuc.gr/~gkarystinos)   +3 more
openaire   +2 more sources

Full Rate L2-Orthogonal Space-Time CPM for Three Antennas [PDF]

, 2008
To combine the power efficiency of Continuous Phase Modulation (CPM) with enhanced performance in fading environments, some authors have suggested to use CPM in combination with Space-Time Codes (STC).
Deneire, Luc, Hesse, Matthias, Lebrun, Jerome   +2 more
core   +2 more sources

Harnessing Fungal Biowelding for Constructing Mycelium‐Engineered Materials

Advanced Engineering Materials, EarlyView.
Mycelium‐bound composites (MBCs) offer low‐carbon alternatives for construction, yet interfacial bonding remains a critical challenge. This review examines fungal biowelding as a biocompatible adhesive, elucidating mycelium‐mediated interfacial mechanisms and their role in material assembly. Strategies to optimize biowelding are discussed, highlighting
Xue Brenda Bai, Xinrui Sarah Niu, Zhao Qin   +2 more
wiley   +1 more source

Reconfigurable super‐low‐frequency magnetoelectric antenna for underwater frequency‐hopping communication

IET Microwaves, Antennas & Propagation
Based on the mechanical regulation mechanism, a super‐low‐frequency (SLF) reconfigurable magnetoelectric (ME) antenna is proposed for underwater frequency‐hopping communication.
Shi‐Yu Wang, Gao‐Qi Dou, Da Yi, Shi‐Min Feng, Ming‐Chun Tang   +4 more
doaj   +1 more source

On the Lightweight Potential of Laser Additive Manufactured NiTi Triply Periodic Minimal Sheet Lattices

Advanced Engineering Materials, EarlyView.
This study explores the lightweight potential of laser additive‐manufactured NiTi triply periodic minimal surface sheet lattices. It systematically investigates the effects of relative density and unit cell size on surface quality, deformation recovery, compression behavior, and energy absorption.
Haoming Mo, Shuo Qu, Shiming Gao, Xu Song   +3 more
wiley   +1 more source

Attitude Determination from Single-Antenna Carrier-Phase Measurements

, 2002
A model of carrier phase measurement (as carried out by a satellite navigation receiver) is formulated based on electromagnetic theory. The model shows that the phase of the open-circuit voltage induced in the receiver antenna with respect to a local ...
Bohnert J. I., Deschamps G. A., Kales M. L., Price G. H., Rumsey V. H., Sinclair G., Thomas B. Bahder, Turner R. F.   +7 more
core   +1 more source

A Compact Spin‐Coated Graphene UWB Antenna for Breast Tumor Detection

Advanced Engineering Materials, EarlyView.
A compact, spin‐coated graphene ultra‐wideband patch antenna designed for breast tumor detection, capable of distinguishing between malignant and benign tumors. This innovative antenna can serve as an effective initial screening tool, particularly in resource‐limited settings such as rural areas, where access to advanced medical equipment like MRI and ...
Raja Rashidul Hasan, Shuvra Saha, Sumit Hassan Eshan, Rinku Basak, Md. Nahian Al Subri Ivan, Ahmed Murtuza Saleque, Raja Tariqul Hasan Tusher, Sadia Zabin, Md. Abdur Rahman, Yuen Hong Tsang   +9 more
wiley   +1 more source

A Wideband Multibeam Transmitarray Antenna Based on 3‐D FSS

IET Microwaves, Antennas & Propagation
This paper presents a novel method for designing a wideband dual‐polarised multibeam transmitarray antenna. First, a dual‐polarised element is implemented through a polarisation‐separating, orthogonal‐interleaved three‐dimensional frequency‐selective ...
Longfei Wang, Wanping Zhang, Yumei Chang, Bo Li, Lei Zhu   +4 more
doaj   +1 more source

Secure Joint Transmitter-Receiver Spatial Media-Based Modulation

IEEE Access, 2020
Joint transmitter-receiver spatial modulation (JSM) is a promising multiple-input multiple-output communication technique that achieves transmit diversity, receive diversity, and multiplexing gain simultaneously.
Runsheng Peng, Fanggang Wang
doaj   +1 more source