High-frequency inductors consist of ceramic materials made of glass and internal/external electrodes made of silver. These inductors can be applied usefully for high frequency of 100 MHz or higher because they have high Q characteristics in high frequency, the SRF characteristics in a high-frequency band, and low resistivity. They are mainly used for impedance matching circuits in RF systems.
A hearable device is a kind of microcomputer that is positioned in the ear and is fitted in the ear canal of the user. This kind of device makes the use of wireless technology to enhance and complement the hearing experience of the wearer. There are many exciting and limitless possibilities of the hearable devices that are experiencing an excellent reception in the market. An area of application which has enormous applications in the field of hearable devices is the area of augmented hearing.
The word “hearables” is coined at the beginning of 2014, referring anything that fits in or on an ear that contains a wireless link or Bluetooth, whether that’s for audio, or remote control of audio augmentation (qv).
An HDTV antenna is a piece of electronic equipment designed to receive television broadcasts in the form of electromagnetic signals that are being transmitted "over the air". When a television station broadcasts its programming, it is converted from audio and video information into these electromagnetic signals.
Hard drives store information magnetically on a spinning platter about 30% smaller than a CD. They also keep small amounts of data stored within RAM (Random Access Memory) chips found elsewhere in the casing. The only method of completely eliminating that information is to blast the hard drive with a magnetic field. The machines that do this are called Degaussers.
Hard Drive Degaussers are used to de-magnetize a hard drive and therefore erase the data on it. Degaussing is an NSA approved method of data erasure for hard drives. It is recommended that after using a degausser, a drive destroyer device is used to complete the secure data destruction.
Degausser is a machine used to eliminate data stored on computer and laptop hard drives, floppy disks and magnetic tape, by randomly changing the alignment of magnetic domains on the medium.
Degaussing takes its meaning from Johann Gauss (1777-1855) a mathematician who studied and worked on electro-magnetic fields. Data is stored on magnetic media by making very small areas called magnetic domains change their magnetic alignment to be in the direction of an applied magnetic field. Degaussing magnetic media leaves the domains in random patterns with no preference to orientation, thereby rendering previous data unrecoverable. A degausser is therefore used to completely erase all audio, video and data signals from magnetic storage media.
Audio IC is a chip widely used as audio processor, audio amplifiers, MEMS microphone and subsystems. It is widely used in the Portable Audio, Computer Audio, Computer Audio, Automotive Audio, etc.
An audio amplifier is an electronic device that increases the strength (amplitude) of audio signals that pass through it. An audio amplifier amplifies low-power audio signals to a level which is suitable for driving loudspeakers. The input signal of an audio amplifier may only measure a few hundred microwatts, but its output may be tens or even thousands of watts. Design parameters for audio amplifiers include gain, frequency response, distortion and noise.
Atomic clock is a clock device that uses an electron transition frequency in the microwave, optical, or ultraviolet region of the electromagnetic spectrum of atoms as a frequency standard for its timekeeping element.
Rubidium atomic clock or rubidium standard, is a high accuracy frequency and time standard. Rubidium atomic clocks, the simplest and most compact of other atomic clocks, use a glass cell of rubidium gas that changes its absorption of light at the optical rubidium frequency when the surrounding microwave frequency is just right. Atomic Clock is a precision clock that depends for its operation on an electrical oscillator regulated by the natural vibration frequencies of an atomic system (as a beam of cesium atoms).
Cesium beam atomic clock (Cs beam) is a device that uses as a reference the exact frequency of the microwave spectral line emitted by atoms of the metallic element cesium, in particular its isotope of atomic weight 133 ("Cs-133").
Hydrogen Maser Atomic Clocks are the most precise clocks in the world, offering the highest short-term stability: time remains stable up to 100 times better than a Rubidium clock.
The Chip Scale Atomic Clock (CSAC) was a microchip-sized atomic clock for use in portable equipment. The Microsemi SA.45s CSAC is the world's first commercially available chip scale atomic clock, providing the accuracy and stability of atomic clock technology while achieving true breakthroughs in reduced size, weight and power consumption.
GPS Anti-Jamming protects GPS receivers from interference and intentional jamming. By the time the GPS signal reaches the Earth's surface is weak and is susceptible to being overcome by higher power Radio Frequency (RF) energy. Even a small jammer of about 10 Watts power can disrupt an unprotected C/A Code receiver for about 30 kilometers (line of sight). GPS Anti-Jamming uses power minimization to reduce the effect of interference and jamming so that the GPS receiver can continue to operate correctly.
GPS technology has revolutionized modern warfare. Military organizations regularly depend on satellite technology for accurate positioning, timing and communications.
But GPS signals received on Earth are weak and susceptible to interference and intentional jamming. Indeed, the signals are usually obscured by thermal noise and only observable with a tuned signal analyzer - in other words a GPS receiver.
A simple low power jammer, readily available via the World Wide Web, can overpower GPS signals within a large area, denying a position solution and timing.
Anti-jam systems are mainly used for land, sea, air (including unmanned aerial systems) in the military field.
Geotechnical sensors can provide information about the physical properties of the subsurface environment, for example, density, competence, and thickness of layers of soil or sediment. Sensors can provide information about stratigraphy, estimate depth to groundwater, or approximate hydraulic conductivity. An investigator must understand the properties and structure of soils and sediments to characterize a site accurately, as these conditions will affect sampling strategies and selection of technologies. Knowledge of the subsurface will also be critical when determining the location, extent, fate and transport, and attenuation of subsurface contaminants.
Gallium Arsenide (GaAs) is a compound semiconductor: a mixture of two elements, Gallium (Ga) and Arsenic (As). Gallium is a byproduct of the melting of other metals, notably aluminum and zinc, and is rarer than gold. Arsenic is not rare, but it is poisonous.