Measurement of the rotational sense and velocity of an object using OAM wave in the radio‐frequency band

2019 ◽  
Vol 55 (12) ◽  
pp. 709-711 ◽  
Author(s):  
C. Brousseau ◽  
K. Mahdjoubi ◽  
O. Emile
Keyword(s):  
Radio Frequency ◽  
Frequency Band

Progress on the Development of NbZr Radio Frequency Band Reject Filters

1984 ◽  
pp. 149-157
Author(s):  
J. J. Hudak ◽  
C. G. Gardner ◽  
A. Harvey ◽  
M. Alper ◽  
D. Cotte
Keyword(s):  
Radio Frequency ◽  
Frequency Band

scholarly journals Optical beat-note frequency stabilization between two lasers using a radio frequency interferometer in the gigahertz frequency band

2014 ◽  
Vol 53 (12) ◽  
pp. 124109 ◽  
Author(s):  
Tomoyuki Uehara ◽  
Kenichiro Tsuji ◽  
Kohei Hagiwara ◽  
Noriaki Onodera
Keyword(s):  
Radio Frequency ◽  
Frequency Band ◽  
Frequency Stabilization ◽  
Beat Note

scholarly journals Scalar Dark Matter in the Radio-Frequency Band: Atomic-Spectroscopy Search Results

2019 ◽  
Vol 123 (14) ◽  
Author(s):  
D. Antypas ◽  
O. Tretiak ◽  
A. Garcon ◽  
R. Ozeri ◽  
G. Perez ◽  
...  
Keyword(s):  
Dark Matter ◽  
Radio Frequency ◽  
Frequency Band ◽  
Atomic Spectroscopy ◽  
Search Results

Smart Antennas for Automatic Radio Frequency Identification Readers

2009 ◽  
pp. 449-473 ◽  
Author(s):  
Nemai Chandra Karmakar
Keyword(s):  
Radio Frequency ◽  
Frequency Band ◽  
Radio Frequency Identification ◽  
Phased Array ◽  
Smart Antennas ◽  
Phased Array Antenna ◽  
Location Finding ◽  
Input Multiple Output ◽  
Frequency Identification ◽  
Rfid Readers

Various smart antennas developed for automatic radio frequency identification (RFID) readers are presented. The main smart antennas types of RFID readers are switched beam, phased array, adaptive beamfsorming and multiple input multiple output (MIMO) antennas. New development in the millimeter wave frequency band?60 GHz and above? exploits micro-electromechanical system (MEMS) devices and nano-components. Realizing the important of RFID applications in the 900 MHz frequency band, a 3×2-element planar phased array antenna has been designed in a compact package at Monash University. The antenna covers 860-960 GHz frequency band with more than 10 dB input return loss, 12 dBi broadside gain and up to 40° elevation beam scanning with a 4-bit reflection type phase shifter array. Once implemented in the mass market, RFID smart antennas will contribute tremendously in the areas of RFID tag reading rates, collision mitigation, location finding of items and capacity improvement of the RFID system.

Методика оценки возможности распределения (выделения) полос частот для одночастотных систем

2020 ◽  
Author(s):  
V.S. Yakimenko
Keyword(s):  
Radio Frequency ◽  
Frequency Spectrum ◽  
Frequency Band ◽  
Electromagnetic Compatibility ◽  
Single Frequency ◽  
Frequency Bands ◽  
Radio Frequency Spectrum

A technique of estimating the possibility of distribution (allocation) of frequency bands for single-frequency systems is proposed. The technique provides the valueof the radio-frequency spectrum unavailable for singlefrequency systems in the specified territorial area and frequency band according to the conditions of electromagnetic compatibility with existing radioelectronic equipment. A system of criteria for evaluating the possibility of allocating frequency bands for singlefrequency systems is proposed. Предложена методика оценки возможности распределения (выделения) полос частот для одночастотных телекоммуникационных систем. Методика предусматривает определение величины адиочастотного спектра (РЧС), недоступного для одночастотных систем в заданном территориальном районе и полосе частот по условиям электромагнитной совместимости (ЭМС) с существующими радиоэлектронными средствами (РЭС). При этом учитывается групповое помеховое воздействие радиоэлектронных средств одночастотных систем на существующие РЭС. Предложена система критериев оценки достаточности доступной части спектра для удовлетворения потребностей в этом ресурсе одночастотных систем.

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