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Journal articles on the topic 'ISM radio band'

Author: Grafiati

Published: 29 March 2025

Last updated: 31 July 2025

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1

Wysocki, Tadeusz A., and Hans-Jurgen Zepernick. "Characterization of the indoor radio propagation channel at 2.4 GHz." Journal of Telecommunications and Information Technology, no. 3-4 (December 30, 2000): 84–90. http://dx.doi.org/10.26636/jtit.2000.3-4.23.

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The unlicensed industrial, scientific, and medical (ISM) band at 2.4 GHz has gained increased attention recently due to the high data rate communication systems developed to operate in this band. The paper presents measurement results of fading characteristics, multipath parameters and background interference for these frequencies. Some statistical analysis of the measured data is presented. The paper provides information that may be useful in design and deployment of communication systems operating in the 2.4 GHz ISM band, like those compliant with IEEE 802.11 standard and Bluetooth open wire

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2

Guo, Y., and K. Feher. "Modem/radio IC architectures for ISM band wireless applications." IEEE Transactions on Consumer Electronics 39, no. 2 (1993): 100–106. http://dx.doi.org/10.1109/30.214814.

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Bello, N., and K. O. Ogbeide. "Designing a Real-time Swept Spectrum Analyser with USRP B210." Nigerian Journal of Environmental Sciences and Technology 5, no. 2 (2021): 329–39. http://dx.doi.org/10.36263/nijest.2021.02.0275.

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Cognitive radio has received considerable amount of attention as a promising technique to provide dynamic spectrum allocation. Spectrum sensing is one of the basic functions in the cognitive radio and is crucial to all other functions. Software- defined radios (SDRs) are considered due to its very high flexibility and have become a common platform for CR implementation replacing expensive spectrum analysers. The most popular among various SDR platforms is the universal software-defined radio peripheral (USRP). This paper presents a real-time swept spectrum sensing solution based on USRP B210.

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Nur, Syahirah Hamdan, Haslinda Mohamad Mas, and Sali Aduwati. "Sensing and analysis of spectrum holes in ISM band using USRP testbed." TELKOMNIKA (Telecommunication, Computing, Electronics and Control) 19, no. 6 (2021): 1761–68. https://doi.org/10.12928/telkomnika.v19i6.19888.

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The spectrum frequency in the wireless communication industry is getting great attention due to the internet of things (IoT) technology's growth. However, the radio spectrum's frequency band use is limited because the primary user for specific services can cause spectrum interference as multiple users use the same spectrum frequency. Meanwhile, at each spectrum frequency, the number of users and utilization time are distinct. These will create vacancies for spectrum frequency assigned to the primary user. A new alternative in using the cognitive radio (CR) spectrum is accessible to the

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Kavak, U., A. Sanchez-Monge, A. Lopez-Sepulcre, et al. "Search for radio jets from massive young stellar objects. Association of radio jets with H2O and CH3OH masers." Astronomy and Astrophysics Volume 645, A29 (2020): 38 pages. https://doi.org/10.1051/0004-6361/202037652.

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Recent theoretical and observational studies debate the similarities of the formation process of high- (> 8 solar masses) and low-mass stars. The formation of low-mass stars is directly associated with the presence of disks and jets. Theoretical models predict that stars with masses up to 140 solar masses can be formed through disk-mediated accretion in disk-jet systems. According to this scenario, radio jets are expected to be common in high-mass star-forming regions. We aim to increase the number of known radio jets in high-mass star-forming regions by searching for radio-jet candida

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van den Eijnden, J., I. Heywood, R. Fender, et al. "MeerKAT discovery of radio emission from the Vela X-1 bow shock." Monthly Notices of the Royal Astronomical Society 510, no. 1 (2021): 515–30. http://dx.doi.org/10.1093/mnras/stab3395.

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ABSTRACT Vela X-1 is a runaway X-ray binary system hosting a massive donor star, whose strong stellar wind creates a bow shock as it interacts with the interstellar medium (ISM). This bow shock has previously been detected in H α and infrared, but, similar to all but one bow shock from a massive runaway star (BD+43o3654), has escaped detection in other wavebands. We report on the discovery of 1.3 GHz radio emission from the Vela X-1 bow shock with the MeerKAT telescope. The MeerKAT observations reveal how the radio emission closely traces the H α line emission, both in the bow shock and in the

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Rammala, Isabella, Aris Karastergiou, and Griffin Foster. "Broadband observations of pulsar profiles and frequency dependent DMs." Proceedings of the International Astronomical Union 13, S337 (2017): 400–401. http://dx.doi.org/10.1017/s1743921317010353.

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AbstractThe aim of our project is to search for ways to best extract information on pulsar profiles and the interstellar medium (ISM), using the wide frequency bands that are typical of radio telescopes today. Pulsar profiles typically show a strong dependence on frequency. This depends both on the intrinsic radio emission mechanism, and the interaction of the radio waves with the ISM that lies between the pulsars and our detectors on Earth, due mostly to the effects of dispersion and scattering. In this work, we make use of radio pulsar beam models from the existing literature, to generate si

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Morabito, Leah K., J. B. R. Oonk, Francisco Salgado, M. Carmen Toribio, Xander Tielens, and Huub Röttgering. "Discovery of Carbon Radio Recombination Lines in M82." Proceedings of the International Astronomical Union 10, S309 (2014): 141–44. http://dx.doi.org/10.1017/s174392131400948x.

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AbstractCold, diffuse HI clouds are a key component of the interstellar medium (ISM), and play an important role in the evolution of galaxies. Carbon radio recombination lines (CRRLs) trace this ISM stage, and with the enormous sensitivity of LOFAR we have already begun to map and constrain the physical properties of this gas in our own Galaxy. Using LOFAR's low band antenna, we have observed M 82 and present the first ever extragalactic detection of CRRLs. We stack 22 lines to find a 8.5-sigma detection. The line peak to continuum ratio is ∼0.003, with a FWHM of 31 km s−1. The CRRL feature is

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Pan, Yong, Zi Ye Hou, Jiang Xiong, and Kai Hua Liu. "Research on the System of Radio Frequency Identification and Localization Works in Microwave." Applied Mechanics and Materials 441 (December 2013): 993–96. http://dx.doi.org/10.4028/www.scientific.net/amm.441.993.

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Radio frequency identification and localization is a key technology in the Internet of Things. This paper reports an ARM Cortex-M3 processor based hand-held radio frequency identification and localization terminal and a 8051 processor based active radio frequency tags. The terminal and the tags utilize STM32F103VET6 and the low power consumption STC12LE4052AD as their master controller, respectively. Both of them use Nordic nRF24L01 as their radio frequency identification module. The system works in 2.4GHz ISM microwave band and can read, write and locate radio frequency tags within 20m indoor

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Grass, Eckhard, Klaus Tittelbach-Helmrich, Chang-Soon Choi, Frank Winkler, Thilo Ohlemüller, and Rolf Kraemer. "Communication systems operating in the 60 GHz ISM band: Overview." International Journal of Microwave and Wireless Technologies 3, no. 2 (2011): 89–97. http://dx.doi.org/10.1017/s1759078711000249.

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This paper gives an overview of frequency regulation, standardization, and applications of 60 GHz communication systems. Based on forecasted developments of mobile IP traffic, the motivation for investigating circuits, and systems for the 60 GHz band is underlined. Some physical properties of 60 GHz radio waves are outlined and implications on potential applications are sketched. The current international and European frequency regulation aspects are presented. The main parameters of three different international standards are summarized and compared with each other. Details of channel spacing

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Pan, Yong, Kai Hua Liu, Yi Gao, and Rui Zhao. "A Study on the System of Radio Frequency Identification and Localization Works in UHF." Advanced Materials Research 588-589 (November 2012): 932–35. http://dx.doi.org/10.4028/www.scientific.net/amr.588-589.932.

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This paper designs a hand-held radio frequency identification and localization terminal based on ARM Cortex-M3 processor and active radio frequency tags based on 8051 processor. This terminal uses STM32F103VET6 as its master controller, these tags use STC12C2052AD as their master controller. They all use Nordic nRF905 as their radio frequency identification module. The system works in 433M/868M/915MHz ISM UHF band and can read, write and locate radio frequency tags within 50m indoors. The actual measurement of active radio frequency tags shows that this terminal is highly stable and comparable

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Assiya, Amri, and Mazri Tomader. "Reconfigurable planar inverted-F antenna for radio frequency identification tag and global positioning system applications." TELKOMNIKA (Telecommunication, Computing, Electronics and Control) 20, no. 3 (2022): 537–43. https://doi.org/10.12928/telkomnika.v20i3.23324.

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This paper presents the design of a reconfigurable planar inverted-F antenna (PIFA). The proposed antenna is designed and optimized to operate in two frequency bands. 2.4 GHz allocated to the industrial, scientific and medical (ISM) band for the identification of a set of vehicules within a given area, and 1.575 GHz allocated to the global positioning system (GPS) band to locate them outside. The ISM band is used for microwave frequencies for active radio frequency identification (RFID) tag, which is associated with the object to be identified. This antenna consists of two radiating elements c

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Das, Deepa, and Susmita Das. "A novel approach for cognitive radio application in 2.4-GHz ISM band." International Journal of Electronics 104, no. 5 (2016): 792–804. http://dx.doi.org/10.1080/00207217.2016.1244865.

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Ribadeneira-Ramírez, Jefferson, Jorge Santamaria, Patricio Romero, and Mario Alejandro Paguay. "Radio Frequency Energy Harvesting Device at ISM Band for Low Power IoT." Progress In Electromagnetics Research M 122 (2023): 11–20. http://dx.doi.org/10.2528/pierm23091504.

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15

Ruf, K., E. Fürst, K. Grypstra, J. Neidhöfer, and M. Schumacher. "Response of the Effelsberg 100m radio telescope to signals in the near-field at 24 GHz." Advances in Radio Science 1 (May 5, 2003): 329–33. http://dx.doi.org/10.5194/ars-1-329-2003.

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Abstract. Short range radar (SRR) for cars has been proposed to operate over 5 GHz of bandwidth at the 24 GHz ISM band. To estimate the level of interference from these devices on radio telescopes, the near-field antenna pattern has to be known. We report on new measurements with the Effelsberg 100 m radio telescope. These measurements were performed with a transmitter set up at a distance of 1.7 km from the telescope. The strength of the signal picked up by the telescope sidelobes shows that the proposed SRR would interfere with sensitive radio astronomical observations.

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Jeong, Won Ho, Hong-Rak Choi, and Kyung-Seok Kim. "Empirical Path-Loss Modeling and a RF Detection Scheme for Various Drones." Wireless Communications and Mobile Computing 2018 (December 6, 2018): 1–17. http://dx.doi.org/10.1155/2018/6795931.

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This paper presents a path-loss model based on a radio-frequency (RF) detection scheme for various drones using 5G aerial communication over an industrial, scientific, and medical radio band (ISM band) network. We considered three communication modes of the ISM band for the channel characteristics analysis: the DJI Enhanced Spread Spectrum Technology (DESST) protocol, Wi-Fi, and Bluetooth. The drone signal detection scheme extracts the drone signal from the environment mixed with the general signal. The drone DESST signal is identified through cross-correlation of the received signal. The Wi-F

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Cong, Yanping, Bin Yue, Yidong Xu, Furen Deng, Jiajun Zhang, and Xuelei Chen. "Loop I/NPS Morphology Predictions in the Ultralong-wavelength Band." Astrophysical Journal 984, no. 2 (2025): 169. https://doi.org/10.3847/1538-4357/adc9a4.

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Abstract Loop I/North Polar Spur (NPS) is the giant arc structure above the Galactic plane observed at radio wavelengths (≲10 GHz). There has been long-standing debate about its origin. While many people believe that it consists of nearby supernova remnants (SNRs), some others consider it as a giant bubble close to the Galactic Center (GC), associated with the Fermi Bubble and the eROSITA X-ray bubble. At ultralong wavelengths (wavelength ≳10 m or frequency ≲30 MHz), particularly below ∼10 MHz, the free–free absorption of the radio signal by diffuse electrons in the interstellar medium (ISM) b

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18

Mathialagan, Srimathi. "Design of CPW-fed tapered MIMO antenna for ISM band applications." International Journal of Microwave and Wireless Technologies 9, no. 1 (2015): 227–30. http://dx.doi.org/10.1017/s175907871500121x.

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In this paper, an implantable coplanar waveguide-fed tapered monopole antenna for industrial scientific and medical band (2.4–2.48 GHz) applications is proposed. This proposed design has an overall dimension of 44 × 44 × 0.5 mm3. The designed antenna is made compatible for implantation on human tissues such as skin, fat, or muscles by embedding it on the RT Duroid substrate and the 10 dB return loss bandwidth is 6.12% ranging from 2.35 to 2.5 GHz. This proposed antenna can be significantly used in implantable medical devices and radio frequency (RF), because of its merits such as conformabilit

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Jin, Zi Long, Beom Seok Kim, Dong Hai Guan, and Jin Sung Cho. "A Probabilistic Routing Protocol Based on Priori Information for Cognitive Radio Sensor Networks." Applied Mechanics and Materials 303-306 (February 2013): 210–14. http://dx.doi.org/10.4028/www.scientific.net/amm.303-306.210.

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The cognitive radio technology has been adopted as a promised solution to deal with overcrowded problem in ISM band. In wireless sensor networks, the cognitive radio technology enables sensor nodes to occupy licensed band in opportunistic manner and introduces advantages of improving spectrum utilization and increasing system throughput. By considering the opportunistic spectrum access nature, in this paper, we aim to provide a stable path selection scheme for cognitive radio sensor networks. The proposed routing protocol utilizes priori delivery information and derives a novel routing metric

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20

Kozłowski, Sebastian, and Krzysztof Kurek. "Channel Occupancy Measurements in 868 MHz ISM Band in Residential Areas." Sensors 21, no. 23 (2021): 7805. http://dx.doi.org/10.3390/s21237805.

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The rapid development of Internet of Things (IoT) has led to more and more devices using ISM frequency bands. Because they are not time synchronized, medium access collisions are unavoidable. The probability of such a collision is usually reasonably low; however, it increases with the number of transmitters competing for the same frequency channel. For this reason, ISM bands’ occupancy is regularly monitored by researchers. This paper presents the results of the measurement campaign during which a selected part of the 868 MHz ISM frequency band was monitored for the presence of transmissions i

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Van den Eijnden, J., P. Saikia, and S. Mohamed. "Radio detections of IR-selected runaway stellar bow shocks." Monthly Notices of the Royal Astronomical Society 512, no. 4 (2022): 5374–89. http://dx.doi.org/10.1093/mnras/stac823.

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ABSTRACT Massive stars moving at supersonic peculiar velocities through the interstellar medium (ISM) can create bow shocks, arc-like structures at the interface between the stellar wind and the ISM. Many such bow shocks have been detected and catalogued at IR wavelengths, but detections in other wavebands remain rare. Strikingly, while electrons are expected to be accelerated in the bow shock and their non-thermal emission may include synchrotron emission at low frequencies, only two massive runaway stellar bow shocks have to date been detected in the radio band. Here, we examine a sample of

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Sandoval, Ruben M., Antonio-Javier Garcia-Sanchez, Jose-Maria Molina-Garcia-Pardo, Felipe Garcia-Sanchez, and Joan Garcia-Haro. "Radio-Channel Characterization of Smart Grid Substations in the 2.4-GHz ISM Band." IEEE Transactions on Wireless Communications 16, no. 2 (2017): 1294–307. http://dx.doi.org/10.1109/twc.2016.2644610.

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Dangkham, Piyapong, Sitthichai Dentri, Chuwong Phongcharoenpanich, and Prayoot Akkaraekthalin. "Circularly Polarized Omnidirectional Antenna with Dipole Core and Diagonally Adjoined Parasitic Braces for ISM Band Applications." International Journal of Antennas and Propagation 2019 (August 21, 2019): 1–11. http://dx.doi.org/10.1155/2019/2463871.

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This research proposes a circularly polarized (CP) single-fed omnidirectional dipole antenna operable in 2.45 GHz frequency for the industrial, scientific, and medical (ISM) radio band applications. The proposed antenna consisted of bisectional dipole core, a pair of quarter-wave baluns, and four diagonally adjoined parasitic braces. The bisectional dipole core was utilized to improve the antenna gain and realize omnidirectional radiation pattern, and the quarter-wave baluns were to symmetrize the current on the bisectional core. The four parasitic braces collectively generated circular polari

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Vasylkivskyi, Y., O. Konovalenko, and S. Stepkin. "Observations of decameter carbon radio recombination lines in several galactic directions. Part 1. Experimental study." RADIO PHYSICS AND RADIO ASTRONOMY 28, no. 3 (2023): 201–11. http://dx.doi.org/10.15407/rpra28.03.201.

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Subject and Purpose. Since decameter carbon radio recombination lines (RRLs) were detected for the first time more than forty years ago, they have significantly extended our knowledge of the physics, kinematics and chemistry of the cold rarefied interstellar medium (ISM). A large number of these lines have been observed towards various Galactic radio sources. The present paper describes our studies of decameter carbon RRLs in such Galactic directions as the sight-lines to the S140 emission nebula and to the large volume of cold neutral hydrogen known as the GSH 139-03-69 super shell. Methods a

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Ahmed, Arslan, Ghulam Hussain, and Ali Raza. "Ultra-Wide Band Horseshoe Antenna for Cognitive Radio Applications." Journal of Applied Engineering & Technology (JAET) 5, no. 1 (2021): 9–18. http://dx.doi.org/10.55447/jaet.05.01.34.

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In this paper, an Ultra-wide band (UWB) micro-strip antenna design is proposed to be suitable for Cognitive radio applications. The geometry of proposed antenna is composed of two semi-circles with their interior modified to achieve higher impedance bandwidth. The semi-etched ground enhances bandwidth to achieve higher data rate. The proposed antenna is fabricated on an inexpensive dielectric substrate FR-4 with relative permittivity of 4.4 and thickness of 1.6mm. The overall dimension of UWB antenna is 60x60x1.6mm and have a bandwidth of 5.7 GHz. The designed antenna covers the most commonly

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Jin, Jie, Xianming Wu, and Zhijun Li. "Ultra low power mixer with out-of-band RF energy harvesting for wireless sensor networks applications." Engineering review 40, no. 1 (2020): 1–6. http://dx.doi.org/10.30765/er.40.1.01.

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An ultra low power mixer with out-of-band radio frequency (RF) energy harvesting suitable for the wireless sensors network (WSN) application is proposed in this paper. The presented mixer is able to harvest the out-of-band RF energy and keep it working in ultra low power condition and extend the battery life of the WSN. The mixer is designed and simulated with Global Foundries ’ 0.18 μ m CMOS RF process, and it operates at 2.4GHz industrial, scientific, and medical (ISM) band. The Cadence IC Design Tools post-layout simulation results demonstrate that the proposed mixer consumes 248 μ W from a

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Kranti, D. Patil. "A Compact Microstrip Patch for Detection of Breast Cancer." Journal of VLSI Design and Signal Processing 6, no. 1 (2020): 22–24. https://doi.org/10.5281/zenodo.3739820.

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As the quantity of bosom disease patients are expanding, we need progressively dependable strategy that can helps in recognizing the sort of malignant growth in beginning times which will prompt spare the patients' lives as the previous tumor is distinguished the higher possibility for recuperation. Subsequently, the point of our undertaking is to configuration minimal low profile wearable reception apparatus that is utilized for early malignant growth discovery with ease. Right now, will utilize the microstrip fix radio wire which is most appropriate sort of recieving wire for this undert

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Leslie, S. K., M. T. Sargent, E. Schinnerer, et al. "Probing star formation and ISM properties using galaxy disk inclination." Astronomy & Astrophysics 615 (July 2018): A7. http://dx.doi.org/10.1051/0004-6361/201732255.

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Disk galaxies at intermediate redshift (z ~ 0.7) have been found in previous work to display more optically thick behaviour than their local counterparts in the rest-frame B-band surface brightness, suggesting an evolution in dust properties over the past ~6 Gyr. We compare the measured luminosities of face-on and edge-on star-forming galaxies at different wavelengths (Ultraviolet (UV), mid-infrared (MIR), far-infrared (FIR), and radio) for two well-matched samples of disk-dominated galaxies: a local Sloan Digital Sky Survey (SDSS)-selected sample at z ~ 0.07 and a sample of disks at z ~ 0.7 d

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Sara, El Mattar, Baghdad Abdennaceur, and Ballouk Abdelhakim. "A 2.45/5.8 GHz high-efficiency dual-band rectifier for low radio frequency input power." International Journal of Electrical and Computer Engineering (IJECE) 12, no. 3 (2022): 2169–76. https://doi.org/10.11591/ijece.v12i3.pp2169-2176.

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This article proposes a concurrent rectifier for radio frequency (RF) energy harvesting from the popular ambient RF sources wireless fidelity (WiFi) 2.45 and 5.8 GHz bands. A voltage doubler-based converter circuit with the Schottky SMS7630 diode is used, this chosen diode has shown good results for low power levels. To ameliorate the resulting circuit, we used an interdigital capacitor (IDC) instead of a lumped component; and then we added a filter to reject the 3rd harmonics of each operating frequency. A dual-band impedance transformer with a direct current (DC) block function is used and o

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Krishnakumar, M. A., P. K. Manoharan, B. C. Joshi, et al. "High precision measurements of interstellar dispersion measure with the upgraded GMRT." Astronomy & Astrophysics 651 (July 2021): A5. http://dx.doi.org/10.1051/0004-6361/202140340.

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Context. Pulsar radio emission undergoes dispersion due to the presence of free electrons in the interstellar medium (ISM). The dispersive delay in the arrival time of the pulsar signal changes over time due to the varying ISM electron column density along the line of sight. Accurately correcting for this delay is crucial for the detection of nanohertz gravitational waves using pulsar timing arrays. Aims. We aim to demonstrate the precision in the measurement of the dispersion delay achieved by combining 400−500 MHz (BAND3) wide-band data with those at 1360−1460 MHz (BAND5) observed using the

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Brzycki, Bryan, Andrew P. V. Siemion, Imke de Pater, et al. "The Breakthrough Listen Search for Intelligent Life: Galactic Center Search for Scintillated Technosignatures." Astronomical Journal 168, no. 6 (2024): 284. http://dx.doi.org/10.3847/1538-3881/ad7e18.

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Abstract The search for extraterrestrial intelligence at radio frequencies has focused on spatial filtering as a primary discriminant from terrestrial interference. Individual search campaigns further choose targets or frequencies based on criteria that theoretically maximize the likelihood of detection, serving as high-level filters for interesting targets. Most filters for technosignatures do not rely on intrinsic signal properties, as the radio-frequency interference (RFI) environment is difficult to characterize. In B. Brzycki et al. (2023), we proposed that the effects of interstellar med

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Gemignani, Matteo, and Salvo Marcuccio. "Dynamic Characterization of a High-Altitude Balloon during a Flight Campaign for the Detection of ISM Radio Background in the Stratosphere." Aerospace 8, no. 1 (2021): 21. http://dx.doi.org/10.3390/aerospace8010021.

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Sounding balloons, available at very low cost from commercial vendors and operable with minimal training, have an excellent potential as testing platforms in the near-space environment. The work reported here was motivated by the need to perform an experimental assessment of the radio frequency (RF) background present in the ISM (Industrial, Scientific and Medical) bands, namely 868 MHz (Ultra High Frequency—UHF) and 2.4 GHz (S-Band), simulating the operational environment of a Low Earth Orbit (LEO) constellation forInternet of Things (IoT) telecommunications. To this end, five balloons were f

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Sandeep Duvvada, Ram, Prabakaran Narayanaswamy, Madhav Phani, and Narayana Lakshmi. "Circularly Polarized Jute Textile Antenna for Wi-MAX, WLAN and ISM Band Sensing Applications." Applied Computational Electromagnetics Society 35, no. 12 (2021): 1493–99. http://dx.doi.org/10.47037/2020.aces.j.351206.

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This study exhibits a circularly polarized (CP) conformal antenna actualized by using a jute textile as a substrate. Its sensing 3.5, 4.9, and 5.8 GHz in the Wi-MAX, WLAN, and ISM radio bands. The topology of the proposed antenna has relied on a curvature structure as the prime radiating element, and ground structure whirled in contradictive arrangement to the patch. Conductivity was materialized by applying copper paint through the traditional painting approach, i.e., brush painting. This fabrication method allows attaining the conformability with minimized size, lightweight, and low sensitiv

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Luo, Xue, Ping Lu, Ce Wang, and Kama Huang. "Multi-Frequency Solar Rectenna Design for Hybrid Radio Frequency–Solar Energy Harvester." Energies 18, no. 9 (2025): 2372. https://doi.org/10.3390/en18092372.

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This paper put forward a hybrid energy harvester for collecting RF and solar energy in quad-band (GSM-900/1800, ISM-2400 and WiMAX-3500). By introducing diverse parasitic structures, good impedance matching with unidirectional radiation is achieved in the multi-band. Below the solar antenna, a low-power rectifier circuit is employed to achieve broadband rectification. Under the input power of 0 dBm, and maximum RF-DC conversion efficiency of 56.94% is realized. Accordingly, the hybrid energy harvester collects RF and solar energy individually or simultaneously, and then converts it into DC for

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Najumunnisa, Md, Ambadapudi Srinivasa Chandrasekhara Sastry, Boddapati Taraka Phani Madhav, et al. "A Metamaterial Inspired AMC Backed Dual Band Antenna for ISM and RFID Applications." Sensors 22, no. 20 (2022): 8065. http://dx.doi.org/10.3390/s22208065.

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This work presents the design and fabrication of a metamaterial-based stimulated dual band antenna on FR4 material (dielectric constant 4.3) to operate in Industrial, Scientific and Medical (ISM) and Radio-frequency Identification (RFID) applications. The antenna model had an overall dimension of 70 × 31 × 1.6 mm3 with etched T-slots and L-slots for dual band resonance. The main objective of this work was to enhance the gain performance characteristic at the selected dual band frequencies of 0.915 GHz and 2.45 GHz. Initially, it achieved a narrow bandwidth of 0.018 GHz with a gain of 1.53 dBi

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Kim, Yung-Ser, and Seung-Hwan Park. "Study on Radio Interference Generation of Medical Telemetry Instruments with ISM Band in Hospital Environment." Journal of Korean Institute of Information Technology 14, no. 12 (2016): 117. http://dx.doi.org/10.14801/jkiit.2016.14.12.117.

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Vivekanand, Chettiyar Vani, T. M. Inbamalar, Kannan Pauliah Nadar, V. Kannagi, and P. Arthi Devarani. "Energy-Efficient Compressed Sensing in Cognitive Radio Network for Telemedicine Services." Wireless Communications and Mobile Computing 2023 (June 17, 2023): 1–12. http://dx.doi.org/10.1155/2023/5415616.

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Wireless body area networks (WBAN) are becoming a promising solution for health care applications. WBAN allows monitoring of patients continuously in their own comfort zone. These devices use the industrial, scientific, and medical band (ISM) for communication. This band is overcrowded due to the increasing number of wireless medical devices and other wireless devices occupying this band. This causes interference, which can be damaging and could result in a change in received power. However, WBAN also needs minimum and reliable energy communication for a longer lifetime and improved quality of

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Bianchi, Simone, Matteo Murgia, Andrea Melis, et al. "The mm-to-cm SED of spiral galaxies." EPJ Web of Conferences 257 (2022): 00005. http://dx.doi.org/10.1051/epjconf/202225700005.

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The mm-to-cm range of the Spectral Energy Distribution of spiral galaxies remains largely unexplored. Its coverage is required to disentangle the contribution of dust emission, free-free and synchrotron radiation and can provide constraints on dust models, star-formation rates and ISM properties. We present the case for a synergy between NIKA2 observations of nearby spirals and those from planned and current instrumentation at the Sardinia Radio Telescope, and report on a pilot K-band program to search for Anomalous Microwave Emission, an elusive emission component which is presumably related

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Streifinger, M., T. Müller, J. F. Luy, and E. M. Biebl. "A software-radio front-end for microwave applications." Advances in Radio Science 1 (May 5, 2003): 201–5. http://dx.doi.org/10.5194/ars-1-201-2003.

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Abstract. In modern communication, sensor and signal processing systems digitisation methods are gaining importance. They allow for building software configurable systems and provide better stability and reproducibility. Moreover digital front-ends cover a wider range of applications and have better performance compared with analog ones. The quest for new architectures in radio frequency front-ends is a clear consequence of the ever increasing number of different standards and the resulting task to provide a platform which covers as many standards as possible. At microwave frequencies, in part

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Moutoulas, Evangelos, Muhammad Hamidullah, and Themis Prodromakis. "Surface Acoustic Wave Resonators for Wireless Sensor Network Applications in the 433.92 MHz ISM Band." Sensors 20, no. 15 (2020): 4294. http://dx.doi.org/10.3390/s20154294.

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Surface acoustic wave (SAW) resonators are low cost devices that can operate wirelessly on a received radio frequency (RF) signal with no requirement for an additional power source. Multiple SAW resonators operating as transponders that form a wireless sensor network (WSN), often need to operate at tightly spaced, different frequencies inside the industrial, scientific and medical (ISM) bands. This requires nanometer precision in the design and fabrication processes. Here, we present results demonstrating a reliable and repeatable fabrication process that yields at least four arrays on a singl

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Ullah, Md, Mohammad Islam, Touhidul Alam, and Farhad Ashraf. "Paper-Based Flexible Antenna for Wearable Telemedicine Applications at 2.4 GHz ISM Band." Sensors 18, no. 12 (2018): 4214. http://dx.doi.org/10.3390/s18124214.

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This paper demonstrates the performance of a potential design of a paper substrate-based flexible antenna for intrabody telemedicine systems in the 2.4 GHz industrial, scientific, and medical radio (ISM) bands. The antenna was fabricated using 0.54 mm thick flexible photo paper and 0.03 mm copper strips as radiating elements. Design and performance analyses of the antenna were performed using Computer Simulation Technology (CST) Microwave Studio software. The antenna performances were investigated based on the reflection coefficient in normal and bent conditions. The total dimensions of the pr

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Mesay, Mengstie* &. Aruna Rai Vadde. "FEEDING OF EFFICIENCY AND DUAL-BAND TECHNOLOGY'S AT WLAN PROTOCOLS OF PI." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 8, no. 4 (2019): 25–35. https://doi.org/10.5281/zenodo.2631136.

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Wireless local area network (WLAN) is an innovation that consolidates PC connects with remote correspondence innovation. The 2.4 GHz and 5 GHz recurrence groups in the Industrial Scientific Medical (ISM) band can be utilized in the WLAN condition. On account of the advancement of remote correspondence innovation and the utilization of the recurrence groups without the requirement for approval, the use of WLAN is ending up increasingly broad. As the key piece of the WLAN framework, the radio wire should likewise be adjusted to the advancement of WLAN correspondence innovation. This paper plans

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G, S. K. Gayatri Devi, Krishna Veni S, Vidyavathi T, and Jalal Ahmad Syed. "Design of a Compact ISM-band Microstrip Slot Antenna for Wireless Sensor Nodes." Indian Journal of Science and Technology 15, no. 38 (2022): 1958–64. https://doi.org/10.17485/IJST/v15i38.1678.

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Abstract <strong>Objective:</strong> To enhance the design and implementation of microstrip antenna for wireless Sensor Networks (WSN) in real-time applications<strong> Methods:</strong> This study uses radio communication to connect end nodes and forms a multihop self-organizing network with a dynamic topology. Also, the antenna is fabricated from low-cost FR-4 printed circuit board (PCB) material. The designed rectangular patch antenna operates in the industrial, scientific, and medical (ISM) frequency band of 2.45 GHz, and HFSS software analyzer is used to authenticate the pr

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A., Ennajih, Zbitou J., Latrach M., Errkik A., El Abdellaoui L., and Tajmouati A. "A Novel Design of a Miniature Metamaterial Antenna for RFID Reader Applications." TELKOMNIKA Telecommunication, Computing, Electronics and Control 16, no. 1 (2018): 174–81. https://doi.org/10.12928/TELKOMNIKA.v16i1.8060.

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In this article, we propose a novel design of a dual band antenna based metamaterial for RFID applications. The proposed antenna consists of a rectangular patch using inverted u-slot in radiating element and two split ring resonators loaded in the ground plane. The antenna is printed on an FR4 substrate having athickness of 1.6 mm, permitivitty of 4.4 and loss tanget of 0.025. this antenna is feed by a micostrip line having caracteristique of 50 Ohms. The designed antenna resonates at the UHF band around 900Mz with an input impedance of 87MHz and also, resonates at the ISM band around 2.45GHz

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Abdulhamid, Mohanad, and James Karugu. "On the design of class-J microwave power amplifier." International Review of Applied Sciences and Engineering 10, no. 3 (2019): 225–32. http://dx.doi.org/10.1556/1848.2019.0026.

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Due to the ISM band being unlicensed for communication applications, a lot of applications have been developed in this band and a good example is WiFi IEEE 802.11a, b, g, n of Bluetooth. This numeracy of applications motivated this paper. The paper is concerned with the design of a low distortion 20 dBm 2.4 GHz class-J power amplifier (PA) since PAs are indispensable in radio communications. The design is based on the AVAGO ATF-52189 transistor with a transition frequency of 6 GHz. The design is done as a hybrid circuit network realized using microstrip elements and surface mount device (SMD)

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Abdulhamid, Mohanad, Karugu James, and Muaayed Farhan. "On the Design of Class-J Microwave Power Amplifier." Scientific Bulletin of Electrical Engineering Faculty 19, no. 1 (2019): 6–12. http://dx.doi.org/10.1515/sbeef-2019-0002.

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AbstractDue to the ISM band being unlicensed for communication applications, a lot of applications have been developed in this band and a good example is WiFi IEEE802.11a, b, g, n of Bluetooth. This numeracy of applications motivated this paper. The paper is concerned with the design of a low distortion 20dBm 2.4GHz class-J power amplifier (PA) since PAs are indispensable in radio communications. The design is based on the AVAGO ATF-52189 transistor with a transition frequency of 6GHz. The design is done as a hybrid circuit network realized using microstrip elements and surface mount device (S

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Wilkinson, T. A., I. R. Johnson, and S. K. Barton. "Performance of direct sequence spread spectrum ISM band radio LANs in a multipath time dispersive channel." Electronics Letters 29, no. 24 (1993): 2084. http://dx.doi.org/10.1049/el:19931392.

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Su. Suganthi, Dr, S. Aishwarya, S. Keerthana, and B. R. Sandhya. "Raspberry PI based advanced communication for disaster management." International Journal of Engineering & Technology 7, no. 2.31 (2018): 74. http://dx.doi.org/10.14419/ijet.v7i2.31.13400.

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When a natural disaster occurs one of the major crisis is communication. This is mainly because when a calamity occurs all the cellular networks, towers and other contemporary means of network goes down making it impossible to communicate with others. Thus in this paper we propose an alternative solution for communication during disaster which can be achieved using a Long range radio transceiver module, which can operate without the help of any towers or base stations. The proposed transceiver model is a standalone device which can transmit and receive voice signals which operates on ISM band

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Elhamraoui, Ahmed, El Hassan Abdelmounim, Jamal Zbitou, Ahmed Errkik, Hamid Bennis, and Mohamed Latrach. "A new compact CPW-Fed dual-band monopole antenna for RFID applications." Indonesian Journal of Electrical Engineering and Computer Science 8, no. 1 (2017): 69. http://dx.doi.org/10.11591/ijeecs.v8.i1.pp69-76.

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<p>This paper presents a study of a new dual-band monopole antenna fed by a Coplanar Waveguide (CPW) line suitable for Radio Frequency Identification (RFID) applications especially designed for RFID readers and covering free ISM bands of 2.45GHz and 5.8GHz. The proposed antenna benefits from the advantages of the CPW line to simplify the structure of the antenna into a single metallic level, by consequent making it easier for integration with microwave integrated circuits. The simulation of the antenna was carried out using ADS from Agilent technologies and CST Microwave Studio electroma

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Atri, P., S. E. Motta, J. van den Eijnden, et al. "Quantifying jet–interstellar medium interactions in Cyg X-1: Insights from dual-frequency bow shock detection with MeerKAT." Astronomy & Astrophysics 696 (April 2025): A223. https://doi.org/10.1051/0004-6361/202452837.

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Context. Accretion and outflows are astrophysical phenomena observed across a wide range of objects, from white dwarfs to supermassive black holes. Developing a complete picture of these processes requires complementary studies across this full spectrum of jet-launching sources. Jet–interstellar medium (ISM) interaction sites near black hole X-ray binaries provide unique laboratories that provide insights into the energetics of the jets launched from stellar-mass black holes. Aims. This work aims to detect and characterise the bow shock near one black hole X-ray binary, Cyg X-1, and then use t

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