Free space loss - Factbites

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	Free space loss - Wikipedia, the free encyclopedia
		Free space power loss is proportional to the square of the distance between the transmitter and receiver and also proportional to the square of the frequency of the radio signal.
		Free space loss is the power loss of a radio signal as it travels from the transmitter to the receiver.
		As the name implies, free space loss assumes the transmitter and receiver are both located in free space and does not consider other sources of loss such as reflections, cable, connectors etc. A discussion of these losses is included in the article on Link budget.
	en.wikipedia.org /wiki/Free_space_loss (263 words)

	Space Race Encyclopedia Article, Information, History and Biography @ LaunchBase.net
		Some observers have argued that the high economic cost of the space race, along with the extremely expensive arms race, eventually deepened the economic crisis of the Soviet system during the late 1970's and 80's and was one of the factors that led to the collapse of the Soviet Union.
		The Space Race became an important part of the cultural and technological rivalry between the USSR and the United States during the Cold War.
		The Space Race, was an informal competition between the United States and the Soviet Union that lasted roughly from 1957 to 1975.
	www.launchbase.net /encyclopedia/Space_race (5325 words)

	Course:
		Free Space path loss model is idealistic based on one unobstructed path from transmitter to receiver and it states that power falls off proportional to d².
		free space loss is likely to give an accurate estimate of path loss.
		The free space propagation model is used to predict received signal strength when the transmitter and receiver have a clear,unobstructed line-of-sight path between them.
	www.cse.iitk.ac.in /users/cs698t/Lecture_notes/lec3.2/lecture3.html (774 words)

	Satellite Footprints by Dish Size - Noise Discussion, Terrestrial Interference (TI), Rain Fade, Free Space Loss, Earth Thermal Noise Chart, Side Lobe Maps, Conflicting Frequency Chart
		FREE SPACE LOSS: Not all low end signal loss is due to increased earth thermal noise reception; low end satellites pass through more atmosphere to reach your dish than high end satellites and that reduces low end satellite signal strength; this is called free space signal loss.
		In addition to horizontal differential slant path losses there are latitude losses which mean that locations at the higher latitudes have a greater slant path to the satellite belt than do satellites at the equator and therefore have more free space signal loss than equatorial receiving locations.
		Free space loss does not cause noise to enter your system but it does prevent signal from being as strong as you may require.
	www.geo-orbit.org /sizepgs/Noise.html (4779 words)

	MBX Model For Micro Cells
		By accounting the free space and diffraction loss from rooftop to the street following formula is proposed for base station antennas below rooftop level.
		In the equation above, a factor of two is included in free space loss term to account for the local scattering from obstacles surrounding the base station since base station is inside the clutter of buildings.
		This analytical model explicates the path loss as a result of signal reduction due to free space wave front spreading, multiple diffraction past rows of buildings, and building shadowing [1].
	www.ee.bilkent.edu.tr /~microwave/programs/wireless/prop/MBXmicro.htm (404 words)

	ZYTRAX - Wireless Calculators
		Free Space Loss - power loss over distance.
		Loss of power over distance (assuming no FRESNEL Effect and nothing in the way).
		Note: Connector loss is generally small UNLESS you've got lots of 'em in which case you are probably in trouble anyway, or your cable is VERY short.
	www.zytrax.com /tech/wireless/calc.htm (1266 words)

	Egli Propagation Model
		Instead, the free-space propagation loss is adjusted for the height of the transmit and receive antennas above ground.
		The typical equation used for Free Space loss between half-wave dipole antennas (in dB) is:
		is zero or less, the free space field value is used.
	www.softwright.com /faq/engineering/prop_egli.html (313 words)

	Support :: Calculations :: Terabeam Wireless
		Free Space Loss - Calculates the free space loss which is the transmission loss between two antennas.
		System Operating Margin (SOM) - Calculates the system operating margin which is the difference between the signal a radio is actually receiving versus what is needed for good data recovery.
	www.terabeam.com /support/calculations/index.php (219 words)

	Support :: Calculations :: Free Space Loss :: Terabeam Wireless
		Free Space Loss can be calculated by the formula listed below which is the transmission loss between two antennas, separated by a distance.
		The formula for calculating free space loss is
		Support :: Calculations :: Free Space Loss :: Terabeam Wireless
	www.terabeam.com /support/calculations/free-space-loss.php (133 words)

	Free-space Loss
		The loss is inversely proportional to the square of the distance travelled and inversely proportional to the square of the frequency used.
		is the major loss suffered by signals in travelling over the Earth-satellite path.
		If you wish to nominate other terms for the glossary, please contact us.
	www.argospress.com /Resources/satellite/frespaclos.htm (158 words)

	SV1DH to PY5CC with One Milliwatt, a calculation of the associated free space and ionosheric losses
		But in the case discussed, the measured path loss was still above free space loss, so there is no proof that ionospheric focusing was taking place.
		The -117.5 dBm signal should be well received with 12.5 dB signal to noise level, free space loss assumed.
		With a 10dBi antenna on the receiving side the adjusted signal loss is 126 dB.
	www.uksmg.org /sv1dh2py5cc.htm (1150 words)

	Free-space loss at opensource encyclopedia
		In telecommunication, free-space loss is the signal attenuation that would result if all absorbing, diffracting, obstructing, refracting, scattering, and reflecting influences were sufficiently removed so as to have no effect on its propagation.
		Note: Free-space loss is primarily caused by beam divergence, i.e.
		"Free-space loss" in world wide web people finder »
	www.wiki.tatet.com /Free-space_loss.html (166 words)

	XtremeDevices.com
		The distance that a signal can travel, given that it has proper line-of-sight, is dependent on the strength of the signal minus the free space path loss and the receiver sensitivity.
		where free space loss = 32.4 + (20 * (log10 freq)) + (20 * (log10 distance))
		signal rec = transmit EIRP - free space loss + rec antenna- rec cable loss
	xtremedevices.com /distance.cgi (151 words)

	Free space loss and obstruction
		Free-space loss increases with the distance between the antennae and the frequency.
		The signal power attenuates (drops off) as it travels between the antenna.
	som.csudh.edu /FAC/LPRESS/471/hout/wireless/propagate.htm (253 words)

	RF Cafe - Free Space Path Loss Friis Equation Formula
		RF Cafe - Free Space Path Loss Friis Equation Formula
		A typical rule of thumb is to not use this path loss equation for distances less than about a wavelength.
		, path loss is calculated as 0 dB, and a shorted distances the path loss is calculated as a negative number.
	www.rfcafe.com /references/electrical/path_loss.htm (285 words)

	Gradual free space loss??? - TechSpot OpenBoards
		Whenever I start my machine up, my computer says that I have about 5.4 gigs of free space and gradually over time, I lose space to nothing at about 10mbs every 10 seconds or so.
		I don't think it would be system restore because he gets his space back after reboot...
		And when I restart my machine, all the space is back.
	www.techspot.com /vb/topic2549.html (853 words)

	MSN Encarta - Dictionary - free space loss definition
		MSN Encarta - Dictionary - free space loss definition
		Search for "free space loss" in all of MSN Encarta
		radio signal weakening in free space: a decrease in the strength of a transmitted radio signal resulting from the distance it has to travel through free space
	ca.encarta.msn.com /dictionary_561538672_1861690786/nextpage.html (84 words)

	Antenna System Designer - Connect802
		Loss between the transmitter and the antenna unit itself
	www.connect802.com /antenna_c_1ht.php?email=&pwd= (231 words)

	Free Space Path Loss (Communications Blockset)
		The Free Space Path Loss block simulates the loss of signal power due to the distance between transmitter and receiver.
		The model shown in the following figure illustrates the effect of the Free Space Path Loss Block with the following parameter settings:
		By the Loss (dB) parameter, if you specify Decibels in the Mode field
	www.weizmann.ac.il /matlab/toolbox/commblks/ref/freespacepathloss.html (164 words)

	MATLAB Central - Newsreader - Free Space Path Loss in video broadcast
		Under no circumstances will The MathWorks be liable in any way for any content not authored by The MathWorks, or any loss or damage of any kind incurred as a result of the use of any content posted, emailed, transmitted or otherwise made available via MATLAB Central.
		to measure/simulate the loss due to distance solely.
		The MathWorks does not control the content posted by visitors to MATLAB Central and, does not guarantee the accuracy, integrity, or quality of such content.
	newsreader.mathworks.com /WebX?14@0.amEdaBe7O3W.0@.eefea02 (278 words)

	free-space loss - OneLook Dictionary Search
		Tip: Click on the first link on a line below to go directly to a page where "free-space loss" is defined.
		We found one dictionary with English definitions that includes the word free-space loss:
	www.onelook.com /?w=free-space+loss (71 words)

	Online Free Space loss between isotropic radiators Calculator
		Online Free Space loss between isotropic radiators Calculator
		It is thought to be accurate but it is the responsibility of the user to verify the accuracy of the calculations when using this program in any official capacity or for the completion of any FCC forms or reports.
	allenk.home.infionline.net /freeloss.html (55 words)

	Annoyances.org - HDD Free space loss (Windows XP Discussion Forum)
		I move the virtual memory cache on another partition, I cleared the IE cache, I use only one account, I used windows washer and disable prefetch mode.
		Maybe I had installed one small application or two; that doesn't explain a minimum of 150 MB vanished.
		Hi, For compatibility reason I managed to install XP on a Fat16 partition; so I had 2GB.
	www.annoyances.org /exec/forum/winxp/1044984753 (176 words)

	Electronic Warfare Online Interactive Calculators
		Calculates the free space path loss between two antennas
		Estimates the Longley-Rice path loss from a given transmitter location
		Calculates the approximate path loss through an urban area
	gbppr.dyndns.org /PROJ/mil/ew (91 words)

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	sh: Path Loss Calculator - Free space path loss calculation
		Path Loss Calculator - Free space path loss calculation
		sh: Path Loss Calculator - Free space path loss calculation
	www139.pair.com /whom/html/pathloss.htm (19 words)

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