Zobrazeno 1 - 10
of 1 697
pro vyhledávání: '"microwave measurement"'
Publikováno v:
IET Science, Measurement & Technology, Vol 18, Iss 6, Pp 271-279 (2024)
Abstract The problem of crystal ice formation inside aircraft turbine engines is well‐documented, and poses a significant risk to safety. The problem is not only one of power loss in flight, but the very real possibility that a flame‐out event co
Externí odkaz:
https://doaj.org/article/1bef46febf344030b913b05ce468df21
Publikováno v:
IET Science, Measurement & Technology, Vol 18, Iss 3, Pp 116-122 (2024)
Abstract The asymmetric calibration method is a very interesting technology for differential output probes. It has been proven that the asymmetric calibration method (ACM) can broaden the application scenarios of the electromagnetic field dual probe.
Externí odkaz:
https://doaj.org/article/a4ee1a6c99bb4730a5fb720c5c8b0d3a
Publikováno v:
Sensors, Vol 24, Iss 18, p 6001 (2024)
In the paper, a new design of a quasi-isotropic antenna for high-power electromagnetic (EM) field measurement is presented, along with its investigation into suitability. The measuring probe is intended for assessing pulsed microwaves, which cannot b
Externí odkaz:
https://doaj.org/article/d11cc26cd00344028bb7fef32ac351ef
Autor:
Gholamreza Moradi
Publikováno v:
International Journal of Information and Communication Technology Research, Vol 15, Iss 3, Pp 1-10 (2023)
This paper presents some microwave circuits, designed for characterization of materials’ permittivity. These include single and multiple-resonant types, transmission line approaches, radiation structures and planar circuits. They have either theore
Externí odkaz:
https://doaj.org/article/a51392fa999548e3ab53f0023194b8b7
Publikováno v:
IET Science, Measurement & Technology, Vol 17, Iss 6, Pp 257-268 (2023)
Abstract In this paper, an improved two‐step method is presented for the sensitivity analysis of vector network analyzer (VNA) S‐parameter measurements due to the non‐ideal line‐reflect‐match (LRM) calibration standards. This improved metho
Externí odkaz:
https://doaj.org/article/5c4a6fda899842f5b6da32ce283c43f8
Publikováno v:
Frontiers in Physics, Vol 12 (2024)
The power broadening of a coupling laser can be converted into two-photon detuning by electromagnetically induced transparency (EIT), resulting in a residual Doppler effect. The residual Doppler effect in a ladder-type EIT in a room-temperature atom
Externí odkaz:
https://doaj.org/article/0348f61321d14f0f975b23e614d0cbe3
Publikováno v:
IET Microwaves, Antennas & Propagation, Vol 17, Iss 6, Pp 434-442 (2023)
Abstract In millimetre wave (mmWave) frequency band, radio resource management (RRM) performance is characterised in plane wave conditions using radiated over‐the‐air test method, which is a challenging combination of protocol and radio frequency
Externí odkaz:
https://doaj.org/article/ca3bb5aff2714feb9675960de15cbbd1
Publikováno v:
IEEE Open Journal of Instrumentation and Measurement, Vol 2, Pp 1-12 (2023)
This article presents a new technique for evaluating the consistency of the reference impedance in multiline thru–reflect–line (TRL) calibration. During the calibration process, it is assumed that all transmission line standards have the same cha
Externí odkaz:
https://doaj.org/article/cedb5072e1204eb799f42b014c62b89b
Autor:
Gregory S. Kanter, Paul M. Moraw, K. F. Lee, Farzaneh Arab Juneghani, Milad Gholipour Vazimali, Kwangwoong Kim, Nicolas K. Fontaine, Sasan Fathpour
Publikováno v:
IEEE Photonics Journal, Vol 15, Iss 4, Pp 1-6 (2023)
We integrate a bow-tie antenna on a thin-film lithium niobate (TFLN) phase modulator to form an electromagnetic E-field sensor. The fiber-coupled TFLN chip is probed by a two-tone optical local oscillator generated using an external phase modulator,
Externí odkaz:
https://doaj.org/article/584044cfa82f4ab38895416b31ec00da
Publikováno v:
IEEE Photonics Journal, Vol 15, Iss 3, Pp 1-8 (2023)
A new photonic-assisted instantaneous frequency measurement system is presented. It overcomes the latency problem in the reported structures based on the frequency-to-time mapping technique or the frequency-to-power mapping technique that involves a
Externí odkaz:
https://doaj.org/article/5e6fcfe1b83d4fd6abd34bc165bbcfaa