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Topic: Ultra high frequency


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UHF
VHF

In the News (Sun 8 Nov 09)

  
  2.4 GHz 802.11b 802.11g and 5.8 GHz 802.11a UNII Ultra High Q WiFi Band Pass Channel Filters
• The 8-pole band pass filters are recommended in high wifi zones or zones with strong RF signals.
Although there are several different frequency channel settings, there is a slight overlap between the channels.
When choosing frequency channels for wireless stations in the vicinity of each other, you should choose frequency channels that are several channels apart from each other (e.g.
www.hyperlinktech.com /web/band_pass_filters.php   (531 words)

  
  liste d'etude scientifique non exhaustive
Engelhardt-H; * homme on the measurement of shear elastic moduli and viscosities of erythrocyte plasma membranes by transitoire déformation dans high frequency electric fields.
Iatsenko-MI [Effect of an ultra high frequency electromagnetic field (microwaves) on temperature and rate of blood flow in a joint] -Kurortol-Fizioter-Lech-Fiz-Kult.
Komissarova-IV [Effect of ultra-high frequency electromagnetic field in continuous and pulse regimens on the indicators of serotonin metabolism in patients with ulcer disease] Vopr-Kurortol-Fizioter-Lech-Fiz-Kult.
www.teslabel.be /liste_etudes.htm   (3179 words)

  
 purevolume™ | Ultra High Frequency
You may or may not have heard of Ultra High Frequency, but if you have, then you already know their unique blend of RocknRoll.
Following footsteps of the great bands of the 1960's and 70's, Ultra High Frequency combines smooth harmonies with dueling melodious guitars and a thunderous rhythm section, unveiling a sound that you just dont hear anymore.
Ultra High Frequency hasn't posted any shows yet.
www.purevolume.com /ultrahighfrequency   (238 words)

  
  Ultra high frequency / very high frequency (uhf/vhf) band enhancement invention
The analog front end transceivers may be a stand-alone Radio Frequency (RF) integrated analog circuit, or alternatively, be embedded with a processor 50 as a mixed-mode integrated circuit.
The received modulated signals may be frequency down-converted, filtered, then converted to a baseband, digital signal.
It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention.
www.freshpatents.com /Ultra-high-frequency---very-high-frequency--uhf-vhf--band-enhancement-dt20061012ptan20060229029.php   (2111 words)

  
  Ultra High Frequency Microarchitecture Project at IBM Research
The purpose of the Ultra high frequency microarchitecture project is to study the challenges and opportunities afforded by the future use of ultra high frequency designs.
Challenges of ultra high frequency microarchitectures studied are latency-aware design of memory hierarchies for both instruction and data delivery, low-complexity high frequency pipeline design, and power analysis.
High Frequency Pipeline Architecture Using the Recirculation Buffer [fulltext]
www.research.ibm.com /lowfo4   (441 words)

  
  Injection-locked ultra-high frequency solid-state oscillator   (Site not responding. Last check: )
The change of the frequency of the main oscillator-wave of the diode oscillator 1 and the change of the spectrum of the oscillation-wave due to the injection of the low-frequency signal may be observed with a spectrum analyzer 17 located on one branch of the waveguide switch 16.
That is, when the frequency f.sub.inj of the injection-wave signal 21 is varied, the frequency f.sub.U or f.sub.L of the sideband-wave 22 or 23 which is in the vicinity of the resonant frequency f.sub.i (24) of the high-Q cavity is trapped by the high-Q resonator 12 and prevented from varying.
In this case, when the frequency f.sub.inj of the injection signal 21 is varied, the frequency f.sub.U of the upper-sideband wave 22 is trapped in the vicinity of the resonant frequency f.sub.i and is not affected by the change of the frequency f.sub.inj of the injection signal 21.
www.sacnewsmonthly.com /invent/golfing/injection-locked_ultra-high_frequency_solid-state.html   (3117 words)

  
  Ultra-high frequency - Wikipedia   (Site not responding. Last check: )
Ultra-high frequency (UHF) radio signals are on frequencies between 328.6 MHz and 2.9 GHz[?], which is higher than those of very high frequency (VHF).
UHF and VHF are the most common frequency bands for television.
On December 29, 1949 KC2XAK[?] of Bridgeport, Connecticut became the first UHF television station to operate on a regular daily schedule.
wikipedia.findthelinks.com /uh/UHF.html   (107 words)

  
 UHF - Ultra-High Frequency
(Ultra High Frequency): Radio frequencies that are between 300 to 3000 MHz.
Ultra high frequency television signals; broadcast channels 14 to 83.
Ultra high frequency Part of the radiofrequency spectrum between 300 and 3,000 MHz.
www.auditmypc.com /acronym/UHF.asp   (242 words)

  
 SingaporeMoms - Parenting Encyclopedia - Ultra high frequency
Ultra high frequency (UHF) designates a range (band) of electromagnetic waves whose frequency is between 300 MHz and 3.0 GHz.
Modern mobile phones also transmit and receive within the UHF spectrum, and UHF is widely used for two-way radio communication (usually using narrowband frequency modulation, but digital services are on the rise) by both public service agencies and the general public.
UHF is also widely used in two-way radio systems and cordless phones due to the fact that since UHF signals essentially travel over line-of-sight distances, distant transmissions cannot travel far enough to interfere with local transmissions.
www.singaporemoms.com /parenting/UHF   (952 words)

  
 Free Mosquito Ringtones - About
The idea was meant to drive away teens through ultra high frequency sounds much like how a dog whistle would affect dogs.
Natural adult hearing loss is particularly acute at higher frequency ranges and most adults can not hear the ultra high frequency ranges after certain age due to a condition known as Presbycusis.
As a curious note: The British press reported the first ironic use of the ultra high frequency ring tones on May 2006 at some schools in Wales, where, apparently, the original "yob-buster,"(a reference to the hooligans it was meant to disperse) The Mosquito device was introduced.
www.freemosquitoringtones.org /about.php   (471 words)

  
 CD Baby: ULTRA HIGH FREQUENCY: Sun never sets in Dramaville - from tonyalexa
Ultra High Frequency, a Long Island foursome influenced by artists ranging from the Beach Boys to Nirvana and the Cure, have the utmost passion for music.
UHF is a band that could inspire the industry to change pace; making this vintage-modern rock hybrid the new sensation.
Ultra High Frequency's debut release, "Sun Never Sets in Dramaville," delivers great vintage guitars with harmonies that faintly resemble one their mentors: the Beach Boys.
cdbaby.com /cd/ultrahighfrequency/from/tonyalexa   (480 words)

  
 Ultra high frequency at AllExperts
One uncommon use of UHF waves is in the detection of partial discharges.
UHF is also widely used in two-way radio systems and cordless phones due to the fact that since UHF signals essentially travel over line-of-sight distances, distant transmissions cannot travel far enough to interfere with local transmissions.
UHF broadcasting was used outside Kuala Lumpur and the Klang Valley by private TV station TV3 in the late 80s, with the government stations only transmitting in VLF and VHF and the 450MHz range being occupied by the ATUR cellular phone service operated by Telekom Malaysia.
en.allexperts.com /e/u/ul/ultra_high_frequency.htm   (1457 words)

  
 Ultra-High-Frequency Systems
The term "line of sight," as used in communications, means that both transmitting and receiving antennas must be within sight of each other and unaffected by the curvature of the Earth for proper communications operation.
Although satellite communications are line of sight, the distance the signal travels is much greater than that of UHF surface communications, because the antennas remain in sight of each other.
The output of the patch panel is connected to the transmitter side of the transceiver, which, in turn, is connected to an antenna coupler.
www.tpub.com /inch/5.htm   (503 words)

  
 Ultra-High Frequency Transducers
Ultra-high frequency (UHF) transducers are designed to complement high-frequency compression drivers and extended-range cone transducers, thus providing the multi-way system with extended frequency range and fidelity.
The 2402H ultra-high frequency transducer is engineered for tight pattern control and extremely high on-axis sensitivity for incredible clarity and crispness.
Designed for use as an ultra-high frequency driver in multi-element, wide range loudspeaker systems, the JBL Model 2404H delivers an unmatched combination of wide, tightly controlled dispersion, extended frequency response, high power capacity, and high efficiency.
www.jblpro.com /pages/components/uhf_drvs.htm   (162 words)

  
 Ultra High Frequency ::: New Album Available NOW!
You may or may not have heard of Ultra High Frequency, but if you have, then you already know their unique blend of Rock‘n’Roll.
Following footsteps of the great bands of the 1960's and 70's, Ultra High Frequency combines smooth harmonies with dueling melodious guitars and a thunderous rhythm section, unveiling a sound that you just don’t hear anymore.
With their youthful inspiration and unparalleled drive for success Ultra High Frequency will undoubtedly have their day in the spotlight.
www.ultrahighmusic.com /new_bandbio.php   (339 words)

  
 [No title]
Pressure Sensors, Micro Miniature, High Frequency, PSI Range
Pressure Sensors, Micro Miniature, High Frequency, Threaded, PSI Range
Ferrite RFI Round Cable Suppressors, High Frequency Ferrites
www.medibix.com /Redirector/AllCategory/mnu/products   (349 words)

  
 Ultra High Vacuum (UHV)
The operation principle of this pump makes it obvious why there are two stages on the vacuum system: the rotary vane pump will work fine when the pressure is high enough to ensure a gas flow through the pump but hopeless when the mean free path of the molecules  is very long.
The rotor of the pump is build such that the gas molecules collide with the fast moving rotor and thereby attain an impulse in the direction of the roughing pump.
The rest gas in that pump is ionized by a plasma discharge due to the high voltage between anode and cathode.
whome.phys.au.dk /~philip/q1_05/surflec/node7.html   (1639 words)

  
 Ultra High Frequency (UHF)   (Site not responding. Last check: )
The ultra-high-frequency (UHF) band is a radio-frequency (RF) band in the range 300-3,000 MHz.
The UHF band can be used for communications systems such as television, which require the transmission of large bandwidths over short distances (generally line-of-sight).
The UHF band is used for fixed communications services, ground-to-air communications, mobile services, and television.
www.argospress.com /Resources/gsm/ultrhighfreque.htm   (230 words)

  
 Ultra High Frequency - Music Downloads - Online
Bio: The Long Island-based pop/rock quartet Ultra High Frequency owes its existence to skatepunk more than other like-minded bands.
Mixing substantial vintage guitar riffs with rough-edged harmonies and an old-school, '60s-flavored sense of tight-bandedness, UHF seemed destined for big things after the release of its 2004 debut, Sun Never Sets in Dramaville.
Ultra High Frequency released its sophomore album, Matter in Time, in June of 2006 with the production help of Barrett Jones (Foo Fighters, Nirvana, Presidents of the United States of America).
musicstore.connect.com /artist/343/Ultra-High-Frequency/17939577.html   (206 words)

  
 F-16: Ultra High Frequency Radio Control ( UHF )
PRESET - UHF frequency is determined by the Preset channel knob.
GUARD - The main receiver and transmitter are automatically tuned to the Guard frequency and the guard receiver is disabled.
Permits the selection of 1 of 14 preset frequencies (channel 1-14) with the mode knob at PRESET and the A-3-2-T knob in A and the mode knob in 2 or 3.
www.meriweather.com /16/left/uhf.html   (271 words)

  
 UHF (Ultra High Frequency) Electronic Circuits
It uses four voltage-controlled capacitors to change the frequency.
UHF: 100W Transistorized Amplifier: (Electronic circuit added 4/05)
Versatile Hybrid Synthesizer for UHF and Microwave Projects: Controlled by the PC parallel port, this hybrid DDS/PLL synthesizer delivers full-octave coverage between 1000 and 2000 MHz with sub-1 Hz resolution and commercial-quality phase-noise performance.
www.discovercircuits.com /U/uhf.htm   (214 words)

  
 News: Unisys and ODIN technologies' Research Reveals RFID High- vs. Ultra-High Frequency Leader for Pharmaceutical ...
The pharmaceutical industry is being driven by regulators at the state and federal level to take additional steps to ensure the safety and authenticity of medicines.
However, much of the recent debate about the merits of high frequency (HF) or ultra high frequency (UHF) RFID at the item level has been founded on anecdotes and narrow business interests.
Since there is a wide variety in RFID tag and reader performance, multiple UHF and HF tags and readers were utilized throughout the process.
www.genengnews.com /news/bnitem.aspx?name=110167   (1132 words)

  
 Ultra High-Frequency TCVCXOs
The device is said to achieve jitter performance of less than 3 ps rms 10 Hz to 80 MHz by avoiding the use of of a phase locked loop in favor of a low-phase noise HFF (high-frequency fundamental) crystal and harmonic multiplication.
The HFF crystal is coupled through a SAW filter, suppressing any sub-harmonics of the operating frequency to typically less than -55 dBc.
Supply voltage is 3.3V with a low current consumption of 65 mA typical, and output is 3.3V PECL (LVPECL) compatible.
www.ferret.com.au /articles/09/0c03b109.asp   (217 words)

  
 Crystal Oscillator provides frequencies up to 2.0 GHz., NEL Frequency Controls, Inc
Burlington, WI (March 9, 2005) NEL Frequency Controls, Inc. announces the release of its new patent pending Ultra High Frequency Crystal Oscillator available at frequencies up to 2 GHz with either Differential Sine or PECL outputs.
This frequency control solution is ideal for high speed digital designs where signal integrity is critical.
Stabilities are from +/-20ppm over a temperature range of 0 to 70 C. The Ultra High Frequency Crystal Oscillator undergoes the rigors of NEL’s HALT/ HASS reliability program.
news.thomasnet.com /fullstory/461978   (774 words)

  
 Ultra High Frequency Antenna   (Site not responding. Last check: )
Because Radio Frequency Energy only travels in the surface of a conductor, the wire or tubes should not be subject to corrosion.
Corrosion will destroy the antenna's ability to recieve especially at UHF frequencies.
The material you use should be robust and able to stand the rigors of oudoor environment.
www.salsburg.com /UHF.html   (253 words)

  
 BandMecca.com - Ultra High Frequency
Ultra High Frequency consists of front man/songwriter Frank Fussa (vocals, guitar), Jon Tehel, (guitar, vocals), Chris Johanidesz (bass, vocals), and DJ Jacobs (drums).
Now comes word that Ultra High Frequency has blasted its way on college radio stations and their respected charts.
Ultra High Frequency has already performed live on air on local radio station WLRI with many other live performances to happen.
www.bandmecca.com /viewband.cfm?ID=819   (310 words)

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