Results 31 to 40 of about 45,299 (236)

A low profile super UWB- MIMO antenna with d-shaped for satellite communications, 5G and beyond applications

open access: yesScientific Reports
This study presents a new compact single-layer microstrip 4-port super UWB MIMO antenna designed to operate in the frequency range of (2.5–50) GHz, achieving an impressive 320.2% impedance bandwidth.
Hesham A. Mohamed, Mohamed Aboualalaa
doaj   +1 more source

Microstrip doubler microwave with non-traditional implementation

open access: yesTekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2019
Frequency multipliers are used in electronic devices to generate spectrally pure sinusoidal signals in the frequency range from a few to tens of GHz. The multipliers are used to multiply the frequency of highly stable but more low-frequency devices with ...
E. Glushechenko
doaj   +1 more source

Cyclic Olefin Copolymers as Versatile Materials for Advanced Engineering Applications

open access: yesAdvanced Functional Materials, EarlyView.
Cyclic olefin copolymers (COCs) are presented as highly versatile materials combining tunable synthesis, excellent optical properties, and mechanical robustness. Their potential spans microfluidics, bioengineering, and advanced electronics, while emerging self‐healing and sustainable solutions highlight future opportunities.
Giulia Fredi   +3 more
wiley   +1 more source

Multimode and Multiband Microstrip Antennas [PDF]

open access: yes, 2007
This thesis describes original work on the broadband and multiband matching of microstrip patch antennas. Microstrip patch antennas suffer from many constraints on their performance. One major restriction is their narrow impedance bandwidth.
Abunjaileh, Alaa Ibrahim
core  

Analysis and control of harmonic radiation from active integrated oscillator antennas [PDF]

open access: yes, 2002
Harmonic radiation from microstrip patch oscillators is examined experimentally and theoretically using both a single and dual parallel-tuned circuit Van der Pol oscillator model.
Buesnal, GR   +5 more
core   +1 more source

Microstrip-fed Triangular UWB Microstrip Antenna Based on DGS

open access: yesInternational Journal of Applied Mathematics, Electronics and Computers, 2016
An ultra-wideband (UWB) monopole microstrip antenna is designed in this study. The design consists of a radiating triangular patch antenna (TPA) fed through a 50 Ohm microstrip transmission line (MTL) constructed over a defected ground structure (DGS). The triangular monopole well is matched to MTL with inserting a thin strip line.
Toktaş, Abdurrahim   +2 more
openaire   +4 more sources

Dual‐Mode Magnetic Elastomer for On‐Demand Motion and Degradation

open access: yesAdvanced Functional Materials, EarlyView.
A dual‐mode magnetic elastomer is introduced, enabling DC field‐driven programmable actuation and AC field‐driven magnetothermal degradation. GHz‐range magnetic fields generate ultrafast heating of magnetic nanoparticles that activates cleavage of the silicone elastomer matrix.
Jieun Han   +13 more
wiley   +1 more source

Investigation of the equivalent circuit parameters and design of a dual polarised dual frequency aperture coupled microstrip antenna

open access: yes, 2013
This paper presents a simplified approach to the design of a single feed dual polarised, dual frequency (1.9 and 2.4 GHz) aperture coupled microstrip antenna. Using simulation and practical investigation, the coupling between the microstrip feed line and
Ghassemlooy, Zabih   +7 more
core   +1 more source

RF communication between dual band implantable and on body antennas for biotelemetry application

open access: yesScientific Reports
This paper investigates two antennas for implantable communication, which are a wide-band, low-profile transmitting antenna with a circular polarization (CP) merit immersed in a lossy medium and a corresponding wide-band, low-profile receiving antenna ...
Yara A. Kamel   +3 more
doaj   +1 more source

Influence of Microcracks on Silver/Polydimethylsiloxane-Based Flexible Microstrip Transmission Lines

open access: yesApplied Sciences, 2020
Microcrack is commonly seen as a defect in materials that affects the performance of flexible radio frequency (RF) devices. Here, we investigate the influence of microcracks on the RF characteristics of flexible microstrip by stretching flexible ...
Daye Ding   +5 more
doaj   +1 more source

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