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Pocket Radar
Pocket Radar products are handheld K‐band Doppler speed radar guns developed and manufactured by Pocket Radar, Inc, a company based in Santa Rosa, California. It was intended for those wishing to measure the speed of everyday objects (such as cars and people). Functionality Pocket Radar utilizes very similar microwave signal emission and detection methods found in the Doppler speed radar guns used by law enforcement agencies. The device measures and weighs when equipped with two AAA batteries. It operates at the 24.125 GHz K-Band frequency and can measure speeds ranging from {{convert, 7, to, 375, mph, abbr=on with an accuracy of ±1 mph (±1.6 km/h) and can also measure feet/second and meters/second. Pocket Radar, Inc Pocket Radar was developed and manufactured by Pocket Radar, Inc. of Santa Rosa, California. The company’s founders, Chris Stewart, Steve Goody, and Grant Moulton were developers in wireless and communication technology companies Hewlett Pac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
K Band (IEEE)
The IEEE K-band is a portion of the radio spectrum in the microwave range of frequencies from 18 to 27 gigahertz (GHz). The range of frequencies in the center of the K-band between 18 and 26.5 GHz are absorbed by water vapor in the atmosphere due to its resonance peak at 22.24 GHz, . Therefore these frequencies experience high atmospheric attenuation and cannot be used for long-distance applications. For this reason, the original K-band has been split into three bands: Ka-band, K-band, and Ku-band as detailed below. The K stands for , the German word for 'short'. Subdivisions Because of the water vapor absorption peak in the center of the band, the IEEE K-band is conventionally divided into three sub-bands: * Ku-band (K-under band, 12–18 GHz): mainly used for satellite communications, direct-broadcast satellite television, terrestrial microwave communications, and radar, especially police traffic speed detectors. * K-band (18–27 GHz): due to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doppler Radar
A Doppler radar is a specialized radar that uses the Doppler effect to produce velocity data about objects at a distance. It does this by bouncing a microwave signal off a desired target and analyzing how the object's motion has altered the frequency of the returned signal. This variation gives direct and highly accurate measurements of the radial component of a target's velocity relative to the radar. The term applies to radar systems in many domains like aviation, police radar detectors, navigation, meteorology, etc. Concept Doppler effect The Doppler effect (or Doppler shift), named after Austrian physicist Christian Doppler who proposed it in 1842, is the difference between the observed frequency and the emitted frequency of a wave for an observer moving relative to the source of the waves. It is commonly heard when a vehicle sounding a siren approaches, passes and recedes from an observer. The received frequency is higher (compared to the emitted frequency) during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radar
Radar is a system that uses radio waves to determine the distance ('' ranging''), direction ( azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, map weather formations, and terrain. The term ''RADAR'' was coined in 1940 by the United States Navy as an acronym for "radio detection and ranging". The term ''radar'' has since entered English and other languages as an anacronym, a common noun, losing all capitalization. A radar system consists of a transmitter producing electromagnetic waves in the radio or microwave domain, a transmitting antenna, a receiving antenna (often the same antenna is used for transmitting and receiving) and a receiver and processor to determine properties of the objects. Radio waves (pulsed or continuous) from the transmitter reflect off the objects and return to the receiver, giving ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radar Gun
A radar speed gun, also known as a radar gun, speed gun, or speed trap gun, is a device used to measure the speed of moving objects. It is commonly used by police to check the speed of moving vehicles while conducting Traffic police, traffic enforcement, and in professional sports to measure speeds such as those of baseball Pitch (baseball), pitches, tennis Serve (tennis), serves, and cricket Bowling (cricket), bowls. A radar speed gun is a Doppler radar unit that may be handheld, vehicle-mounted, or static. It measures the speed of the objects at which it is pointed by detecting a change in frequency of the returned radar signal caused by the Doppler effect, whereby the frequency of the returned signal is increased in proportion to the object's speed of approach if the object is approaching, and lowered if the object is receding. Such devices are frequently used for speed limit enforcement, although more modern LIDAR speed gun instruments, which use pulsed laser light instead of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AAA Batteries
The AAA battery (or triple-A battery) is a standard size of dry cell battery. One or more AAA batteries are commonly used in low-drain portable electronic devices. A zinc–carbon battery in this size is designated by IEC as R03, by ANSI C18.1 as 24, by old JIS standard as UM-4, and by other manufacturer and national standard designations that vary depending on the cell chemistry. The size was first introduced by The American Ever Ready Company in 1911. In China, they are called #7 batteries, the name originating from Charles F. burgess of the Burgess Battery Company designating his AAA batteries "Number 7". An AAA battery is a single cell that measures in diameter and in length, including the positive terminal button, which is a minimum . The positive terminal has a maximum diameter of ; the flat negative terminal has a minimum diameter of . Alkaline AAA batteries weigh around , while primary lithium AAA batteries weigh about . Rechargeable nickel–metal hydride (Ni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hewlett Packard
The Hewlett-Packard Company, commonly shortened to Hewlett-Packard ( ) or HP, was an American multinational information technology company. It was founded by Bill Hewlett and David Packard in 1939 in a one-car garage in Palo Alto, California, where the company would remain headquartered for the remainder of its lifetime; this HP Garage is now a designated landmark and marked with a plaque calling it the "Birthplace of 'Silicon Valley. HP developed and provided a wide variety of hardware components, as well as software and related services, to consumers, small and medium-sized businesses ( SMBs), and fairly large companies, including customers in government sectors, until the company officially split into Hewlett Packard Enterprise and HP Inc. in 2015. HP initially produced a line of electronic test and measurement equipment. It won its first big contract in 1938 to provide the HP 200B, a variation of its first product, the HP 200A low-distortion frequency oscillator, for W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerent Corporation
Cerent Corporation was an optical equipment maker based in Petaluma, California. It was founded in 1997 as Fiberlane Communications with funding from Kleiner Perkins Caufield & Byers and Vinod Khosla as the managing VC. The company was founded with three divisions: Systems in Petaluma, Chip Design in Mountain View, California and Network Management Systems in Burnaby, British Columbia. In early 1998 the company split into two companies with the Petaluma branch becoming Cerent and the Burnaby and Mountain View branches becoming Siara Systems (Acquired by Redback Networks in 1999). The Cerent 454 Cerent's first product was the Cerent 454 (later the Cisco 15454). The Cerent 454 was a second generation SONET ADM (Add-Drop Multiplexor) that also supported TCP/IP data switching. When operating as a pure ADM, the 454 could add and drop circuits from OC-192 down to Digital Signal 1 (DS1) -- later it would support wavelength-division multiplexing (WDM). Unlike the ADMs that preceded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Next Level Communications
NeXT, Inc. (later NeXT Computer, Inc. and NeXT Software, Inc.) was an American technology company headquartered in Redwood City, California that specialized in computer workstations for higher education and business markets, and later developed web software. It was founded in 1985 by CEO Steve Jobs, the Apple Computer co-founder who had been forcibly removed from Apple that year. NeXT debuted with the NeXT Computer in 1988, and released the NeXTcube and smaller NeXTstation in 1990. The series had relatively limited sales, with only about 50,000 total units shipped. Nevertheless, the object-oriented programming and graphical user interface were highly influential trendsetters of computer innovation. NeXT partnered with Sun Microsystems to create a programming environment called OpenStep, which decoupled the NeXTSTEP operating system's application layer to host it on third-party operating systems. In 1993, NeXT withdrew from the hardware industry to concentrate on marketing OPEN ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agilent Technologies
Agilent Technologies, Inc. is an American global company headquartered in Santa Clara, California, that provides instruments, software, services, and consumables for laboratories. Agilent was established in 1999 as a spin-off from Hewlett-Packard. The resulting IPO of Agilent stock was the largest in the history of Silicon Valley at the time. From 1999 to 2014, the company produced optics (LED, laser), semiconductors, EDA software and test and measurement equipment for electronics; that division was spun off to form Keysight. Since then, the company has continued to expand into pharmaceutical, diagnostics & clinical, and academia & government (research) markets. Products and services Agilent serves analytical laboratories and the clinical and routine diagnostics markets with a full suite of technology platforms. These include: automation, bioreagents, FISH probes, gas and liquid chromatography, immunohistochemistry, informatics, mass spectrometry, microarrays, spectroscop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cisco Systems
Cisco Systems, Inc. (using the trademark Cisco) is an American multinational corporation, multinational digital communications technology conglomerate (company), conglomerate corporation headquartered in San Jose, California. Cisco develops, manufactures, and sells networking hardware, software, telecommunications equipment and other high-technology services and products. Cisco specializes in specific tech markets, such as the Internet of things (IoT), internet domain, domain security, videoconferencing, and energy management with List of Cisco products, products including Webex, OpenDNS, XMPP, Jabber, Duo Security, Silicon One, and Cisco Jasper, Jasper. Cisco Systems was founded in December 1984 by Leonard Bosack and Sandy Lerner, two Stanford University computer scientists who had been instrumental in connecting computers at Stanford. They pioneered the concept of a local area network (LAN) being used to connect distant computers over a multiprotocol router (computing), route ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Consumer Electronics Association
The Consumer Technology Association (CTA)® is North America's largest standards and technology trade organization representing more than 1,200 technology companies. CTA is led by CEO and Vice Chair Gary J. Shapiro. Trade shows CES CES is a major technology trade show held each January in Las Vegas. The first CES was held in 1967 in New York City. It was a spin-off from the Chicago Music Show, which until then had served as the main event for exhibiting consumer electronics. The event had 17,500 attendees and over 100 exhibitors. From 1978 to 1994, CES was held twice each year: once in January in Las Vegas, known as '' Winter Consumer Electronics Show'' (WCES), and once in June in Chicago, known as ''Summer Consumer Electronics Show''. In 1998, the show changed to an annual format with Las Vegas as the location. CES is one of the largest and longest-running trade shows held in Las Vegas, taking up to 17 days to set up, run, and break down. Awards programs CTA has se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
