New Radio-Frequency Photonic Filter based on photonic-phononic emitter-receivers

A radio-frequency electrodeless discharge cell for studying the emission spectra of organic molecules is described. This medium pressure source is stable and reproducible with and without sampling it is also self-initiating. Pressure, power, and flow rate studies as well as “gas temperature” measurements were made. Low and medium resolution spectra of aromatic and nonaromatic chlorinated hydrocarbons and chlorinated pesticides are discussed. A qualitative internal wavelength standard is also described.

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New radio frequency technique for deposition of hard carbon films

Journal of Vacuum Science & Technology A Vacuum Surfaces and Films ◽

10.1116/1.572961 ◽

1985 ◽

Vol 3 (3) ◽

pp. 610-613 ◽

Cited By ~ 15

Author(s):

A. R. Nyaiesh ◽

R. E. Kirby ◽

F. K. King ◽

E. L. Garwin

Keyword(s):

Radio Frequency ◽

Carbon Films ◽

Hard Carbon ◽

New Radio

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Faculty Opinions recommendation of Effects of a new radio frequency-controlled neuroprosthesis on gait symmetry and rhythmicity in patients with chronic hemiparesis.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1101137.557122 ◽

2008 ◽

Author(s):

Robert Ruff

Keyword(s):

Radio Frequency ◽

Gait Symmetry ◽

New Radio

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Letter-shaped microstrip ground slots

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078712000426 ◽

2012 ◽

Vol 4 (5) ◽

pp. 523-528

Author(s):

Amr M. E. Safwat

Keyword(s):

Radio Frequency ◽

Radio Frequency Identification ◽

Character Recognition ◽

Systematic Approach ◽

Microwave Circuits ◽

Circuit Model ◽

New Radio ◽

S Parameters ◽

Frequency Identification ◽

New Applications

This paper proposes a systematic approach for designing and modeling letter-shaped microstrip ground slots. Twenty-three structures are investigated. For each one, a geometrical circuit model is developed. Interestingly, 21 letters have unique s-parameters (electromagnetic [EM] print). Results are confirmed by EM simulations and measurements. These results may pave the way to new applications, e.g. microwave character recognition, letter-based microwave circuits, or new radio frequency identification (RFID) structures

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A Frequency-Programmable Miniaturized Radio Frequency Transmitter for Animal Tracking

Sensors ◽

10.3390/s21196683 ◽

2021 ◽

Vol 21 (19) ◽

pp. 6683

Author(s):

Jun Lu ◽

Huidong Li ◽

Chuan Tian ◽

Mitchell J. Myjak ◽

Jie Xiao ◽

...

Keyword(s):

Radio Frequency ◽

Circuit Design ◽

Animal Behavior ◽

Signal Strength ◽

Animal Tracking ◽

Coding Schemes ◽

New Radio ◽

The Impact ◽

Animal Monitoring ◽

Radio Frequency Transmitter

In animal tracking applications, smaller transmitters can reduce the impact of the transmitter on the tagged animal and thus provide more accurate data about animal behavior. By combining a novel circuit design and a newly developed micro-battery, we developed frequency-programmable and more powerful radio frequency transmitters that are about 40% smaller and lighter in weight than the smallest commercial counterpart for animal monitoring at the time of development. The new radio frequency transmitter has a miniaturized form factor for studying small animals. Designs of two coding schemes were developed: one transmits unmodulated signals (weight: 152 mg; dimensions: Ø 2.95 mm × 11.22 mm), and the other transmits modulated signals (weight: 160 mg; dimensions: Ø 2.95 mm × 11.85 mm). To accommodate different transmitter life requirements, each design can be configured to transmit in high or low signal strength. Prototypes of these transmitters were evaluated in the laboratory and exhibited comparable or longer service life and higher signal strength compared to their smallest commercial counterparts.

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Characterising a Custom-Built Radio Frequency PECVD Reactor to Vary the Mechanical Properties of TMDSO Films

Molecules ◽

10.3390/molecules26185621 ◽

2021 ◽

Vol 26 (18) ◽

pp. 5621

Author(s):

Racim Radjef ◽

Karyn L. Jarvis ◽

Colin Hall ◽

Andrew Ang ◽

Bronwyn L. Fox ◽

...

Keyword(s):

Mechanical Properties ◽

Radio Frequency ◽

Photoelectron Spectroscopy ◽

Plasma Reactor ◽

Chemical Vapour ◽

Barrier Properties ◽

Rf Plasma ◽

Deposition Parameters ◽

New Radio ◽

Carbon Fibre Composites

Plasma-polymerised tetramethyldisiloxane (TMDSO) films are frequently applied as coatings for their abrasion resistance and barrier properties. By manipulating the deposition parameters, the chemical structure and thus mechanical properties of the films can also be controlled. These mechanical properties make them attractive as energy adsorbing layers for a range of applications, including carbon fibre composites. In this study, a new radio frequency (RF) plasma-enhanced chemical vapour deposition (PECVD) plasma reactor was designed with the capability to coat fibres with an energy adsorbing film. A key characterisation step for the system was establishing how the properties of the TMDSO films could be modified and compared with those deposited using a well-characterized microwave (MW) PECVD reactor. Film thickness and chemistry were determined with ellipsometry and X-ray photoelectron spectroscopy, respectively. The mechanical properties were investigated by nanoindentation and atomic force microscopy with peak-force quantitative nanomechanical mapping. The RF PECVD films had a greater range of Young’s modulus and hardness values than the MW PECVD films, with values as high as 56.4 GPa and 7.5 GPa, respectively. These results demonstrated the varied properties of TMDSO films that could in turn be deposited onto carbon fibres using a custom-built RF PECVD reactor.

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