Wideband Bandpass TM Cavity Filters With Wide Spurious Free Band by Abdul Rehman, Cristiano Tomassoni

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Application of Cad-Cam for Fabrication of Metal-Free Band and Loop Space Maintainer by Harleen Kaur Soni

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Correspondence: Application of CAD-CAM for Fabrication of Metal-free Band and Loop Space Maintainer by Niraj Gokhale, Parin Shah, Shivayogi M Hugar, Divyata Kohli

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Uso de la banda de 2,4 GHz según la regulación colombiana by Roberto Cárdenas Castiblanco

Subjects: “…Free band…”
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Wireless Local Area Networks: A Comprehensive Guide by P. Pomenka

“…This paper deals mainlywith wireless LAN using license-free band such as 2.4GHz (ISM) or5.2GHz.…”
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Design of Compact Quasi-Elliptic Bandpass Filters Based on Coaxial Inset Resonators by Abdulrahman Widaa, Chad Bartlett, Michael Hoft

“…The fabricated filter has a compact structure of 29.76 cm 3, an insertion loss better than 0.73 dB, a return loss better than 18 dB, and a wide spurious-free band up to <inline-formula> <tex-math notation="LaTeX">$3.5\cdot f _{0}$ </tex-math></inline-formula>. …”
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Secrecy performance of FSO communication systems with non‐zero boresight pointing errors by Gyan Deep Verma, Aashish Mathur, Yun Ai, Michael Cheffena

“…Abstract Free space optical (FSO) communication is a promising candidate for the next generation (5G and beyond) wireless communication systems, due to its merits (i.e. low latency, high data rate, and license‐free band, among others). However, atmospheric turbulence (AT) as well as pointing error (PE) are two of the main challenges with FSO communication that affect its performance. …”
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Development of radio direction finder using 6 log Periodic dipole array antennas by Juli Purwanto, Kartiko Nugroho, Yahya, Azli, Khamis, Nor Hisham, Mohd. Nor, Nuramirah, Shaari, Mohammad Razman, Mat Sidek, Abdul Rahim

“…Six unit of log periodic printed circuit board antenna from WA5VJB is used in this project since it is commonly used in UHF licence-free band. A modified amplitude comparison method has been made in order to match the antenna character. …”

Powering E-Textiles Using a Single Thread Radio Frequency Energy Harvesting Rectenna by Mahmoud Wagih, Alex S. Weddell, Steve Beeby

“…The antenna maintains its bandwidth across the 868/915 MHz license-free band on- and off-body with only −4.7 dB degradation in total efficiency in human proximity. …”
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2.4GHZ ISM band congestion : WLAN and WPAN performance analysis by Mahalin, Nur Hija, S. Ari'ffin, Sharifah H., A. Rashid, Rozeha

“…The 2.40 GHz frequency band is also known as the ISM (Industrial Scientific and Medical) band, is a license free band allocated for a variety of consumer applications: environmental monitoring, agriculture, medical care, smart buildings, factory monitoring and automation, and numerous military applications. …”
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Radio Wave Attenuation Measurement System Based on RSSI for Precision Agriculture: Application to Tomato Greenhouses by Dora Cama-Pinto, Juan Antonio Holgado-Terriza, Miguel Damas-Hermoso, Francisco Gómez-Mula, Alejandro Cama-Pinto

“…This paper presents a system that has been developed to measure the attenuation of radio waves in the 2.4 GHz free band (ISM- Industrial, Scientific and Medical) when propagating inside a tomato greenhouse based on the received signal strength indicator (RSSI), and a procedure for using the system to measure RSSI at different distances and heights. …”
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A Novel Magnetic Coupling for Miniaturized Bandpass Filters in Embedded Coaxial SIW by Stefano Sirci, Jorge D. Martínez, Vicente E. Boria

“…By creating the loading capacitance of a combline topology using inner layers of a low-temperature co-fired ceramic (LTCC) stack-up, it is possible to achieve resonator miniaturization while improving the spurious-free band and providing full-packaged solutions. Moreover, a new magnetic coupling scheme consisting of short-ended stripline probes is proposed and analyzed in detail, both for direct and external couplings. …”
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WiFi visualiser : viewing WiFi signal in a pictorial view I by Tan, Keng Leng

“…In this report, the author seeks for a solution to "see" the 2.4GHz WiFi signal. WiFi is a free band from the electromagnetic spectrum which does not require permission or authority to access and it is readily available everywhere in the area where the author stays. …”
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Orientation Aware Intelligent 3-D Cubic Antenna System With Automated Radiation Pattern Reconfigurability by Maria Bermudez Arboleda, Kirill Klionovski, Su Zhen, Atif Shamim

“…All these protocols communicate in the 2.4 GHz ISM free band using network structures made of two main nodes: A central node (CN) in charge of collecting the data from multiple devices and uploading it to the cloud, and multiple peripheral nodes (PN) which are simpler devices with limited power consumption so they can be battery operated. …”
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Study on FR4 substrate backed flaring antenna structure for wideband applications by Keerthana S., Indumathi G., Mani N. Naveen, Nishanth R.

“…A class of planar antenna which offers better performance over broad band of frequencies that fits itself in wide range of applications are in need of research. The license free band from 3.1 GHz to 10.6 GHz that do not cause interference to narrowband signals is chosen as operating range of frequencies for the chosen Vivaldi antenna. …”
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Testbed for LoRaWAN Security: Design and Validation through Man-in-the-Middle Attacks Study by Ondrej Pospisil, Radek Fujdiak, Konstantin Mikhaylov, Henri Ruotsalainen, Jiri Misurec

“…This paper focuses specifically on the security and privacy aspects of one of the most popular license-free-band LPWA technologies, which is named LoRaWAN. …”
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Separation-Independent Wearable 6.78 MHz Near-Field Radiative Wireless Power Transfer using Electrically Small Embroidered Textile Coils by Mahmoud Wagih, Abiodun Komolafe, Bahareh Zaghari

“…This work proposes radiative WPT, in the 6.78 MHz license-free band, as a hybrid solution to separation-independent WPT, thus mitigating the losses associated with coil separation. …”
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Widely Tunable TM-Mode Dielectric Filters With Constant Absolute Bandwidth Using Re-Entrant Caps by Abdulrahman Widaa, Michael Hoft

“…For proof of concept purposes, a single widely tunable resonator is presented with octave tuning ratio of 2.64:1, high quality factor from 1705 to 5480, and spurious-free band up to <inline-formula><tex-math notation="LaTeX">$3.44\cdot$</tex-math></inline-formula><inline-formula><tex-math notation="LaTeX">$f_\mathrm{0}$</tex-math></inline-formula>. …”
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Traditions of creating the form and ornamentation of the pottery vessels of the Alakul Culture in the Alakul burial ground (a case study for the burial mounds 1 and 14) by Ilyushina V.V., Klimova A.D., Novikov I.K.

“…In the composition of the ornament, traditional was the placement of the ornamental motifs in the upper part of the neck and on the upper and lower parts of the body, with the allocation of a “free band” in the lower part of the neck and brachium. …”
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A Different Approach for Sensing Disruption by Turki Y. Alkhamees, Laurence B. Milstein

“…Most disruption attacks in the current literature involve spoofing of the free bands used for sensing by making them appear busy. …”
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