. Has 90% of ice around Antarctica disappeared in less than a decade? This is directional feature is called GAIN. The reactive effect of the 15 meter dipole ruins the performance of the 20 and 10 meter dipoles. outdoor antennas have better dBis than indoor antennas as they are directional antennas used in point to point and point to multipoint connections. That was why the ancestors told you not to put a 15 meter dipole on the same coax with them. If one wanted to calculate path loss they might use the "Friis Transmission Equation" for path loss. Following equation or formula is used for Antenna range calculator. These cookies may be set through our site by our advertising partners. The forward gain is compared with the hypothetical isotropic antenna, which uniformly distributes energy in all directions. Countries will typically have specific regulations on how much power an antenna may emit. the maximum effective radiated power (transmit power plus antenna gain) is 100 mW EIRP (20 dBm). ** In the absence of any other objects/reflections, the other antenna would only receive the power that was directly radiate towards it, so it really doesn't matter what the gain in any other direction is. It has to be referenced to something else to provide meaningful measurement. Lots of ways to repeat what was already stated. As for TP-Links claim on achieving 56km, it is almost impossible unless you have a clear line of sight. Very Suitable For Remote Areas Where Cellular Tower Are Far Located. How does a fan in a turbofan engine suck air in? Going back to the example of binoculars and telescopes, antennas add a level of complexity to this because of this full 360* view that you start out with. At least read its reviewd. Stripline Impedance calculator The Yagi antenna is an incredibly useful tool for directional communications. But the radar and military frequency is also 5GHz, so 5GHz wireless may also have some interference, and many countries require that wireless devices working on 5GHz should support DFS(Dynamic Frequency Selection) and TPC(Transmitting Power Control). This page of converters and calculators section covers Antenna Range calculator. Copyright 2002 - 2022 Data Alliance Inc. - All rights reserved. . A kit with an Omni 6.5 dBi for 824-960 MHz, a cable-SMA 1 meter in length and a mechanical support to secure it to . Transmit Antenna Gain (Gt) Since it is directional, you will need to point it more carefully. Let's see. Receiver sensitivity These are a bit expensive for home usage, but for large network is good. Cut three short lengths of 550 cord (15-20 inches long), or use cable-ties, twine, boot laces, etc. The combined data of Tables 1 and 2 let us do this as an estimate of Directional Forward Power. Antenna Transmit Power (Pt) This increased signal strength of 4.8 dB is 10^(4.8/10) = 3 times more power. This can happen with multi-band antennas or when a tower has too many transmitters on board (common in DAS installations). to NF, Antenna Tutorial On the other hand, if you use 10 dBi antennas at a distance of 1 meter, then you can expect to have around -80 dBm at the receiver. Would the reflected sun's radiation melt ice in LEO? Last update on 2022-05-10 / Affiliate links / Images from Amazon Product Advertising API. The amount of intensification in a preferred direction is quantified as gain. Even if you double the length of cable on an antenna and you halve its efficiency, you are still doubling the power loss over a given length. Add the gain (dBi) from your antenna and subtract the losses from any connections to figure out your Effective Isotropic Radiated Power (EIRP). Specifically the linked antenna is pretty much a vertical wire. Please enable cookies on your browser and try again. For Wifi however, it serves a dual purpose. This can happen on a tower with multiple antennas if one antenna is too close to another or if it rests too close to other structures. Range-marker generators produce pulses based on what radar constant? EXAMPLE Values for this WLAN range calculator or WiFi range calculator: INPUTS: Frequency(MHz) = 2450 MHz ; Transmit power= 20 dBm ; Receiver sensitivity= -100dBm ; Transmit Antenna Gain = 6 dBi ; Receiver Antenna Gain = 6 dBi ; Fade Margin = 12 dB ; cable loss = 0; Other Losses = 0 OUTPUTS: Maximum Path Loss =120 dB WLAN/WiFi coverage range = 9.746 Km My big house (3,200sf, 3 floors) is covered nicely (always max bars) by a TP-LINK S4 mesh with three units. Summary: Weve been putting our routers in the wrong place this whole time. Click to expand. In such an instance, dBi would refer to how effective the WiFi routers antenna is. Microstrip line impedance THis gain typically 2~3dBi accounts for the loss in other directions. However, no matter how much power is radiated, if a receiver cannot capture and demodulate the radio waves properly, then there will be no communications. There are times when spec sheets may show the voltage & power level e.g. For example, you want to create a vertical beam that is 3 dB greater than your other beams. Some of the content is copyrighted to Geckoandfly.com and may not be reproduced on other websites. There are not only two solutions as presented. dB as a standalone unit represents loss or gain and does not have any dimension. Helium Miner 8 dbi Antenna LoRa 915 MHz 43.3 Inch Tall Outdoor w/Raigen 400 Low Loss Cable Omni-Directional HNT Hotspot for MNTD, Nebra, RAK, Bobcat, Syncrob, and Sensecap Signalplus Lora Antenna 915mhz 5.8dBi Outdoor Omni Helium Bobcat Miner Antenna 915MHz 824MHz-960MHz GSM Marine Antenna 15.7inch+3Meters RG58 Cable-for Boat Car ATV UTV RZR SPA The effects of this situation include interference and near-constant retuning of the receiver. https://www.pasternack.com/t-calculator-fspl.aspx, that 2.2 dBi gain gives you about a 22 m additional range (same pathloss at 78 m for a 0 dBi antenna as 100 m for a 2.2 dBi antenna). The CP22E is a very impressive antenna and 5 dBi in a nine foot 2m antenna is a design win. Alfa includes a WiFi network scanning CD with the included ALFA WiFi Scaner software to view and save all the data from the nearby WiFi networks. Asking for help, clarification, or responding to other answers. When used in the 2-way radio field, the dB is referenced to a 50 ohm load, with the resultant voltage being 0.224 volts. Far-field range (FF) The far-field range was the original antenna measurement technique, and the simplest; it consists of placing the antenna under test (AUT) a long distance away from the instrumentation antenna. Extending Range of a microstrip antenna with a SMA 2.4GHz Omni Direction 20db wifi antenna. These devices add noise to the medium that can further decrease the speed of wireless networks. 2.4GHz suffers more interference than 5GHz. 2 Antennas 20M4DX HF Monoband Beam Antennas are full size, 4 element, 20 meter Yagis that leave the competition in the dust! Therefore dB is not an absolute measurement but rather a ratio. This information is usually included in anFCC application or test report. The primary difference between the 2.4 GHz and 5GHz wireless frequencies is range as the 2.4GHz frequency is able to reach farther than the 5GHz frequency. In order to take into account the loss that an antenna can experience after some time, it is important to know how long you will have access to it before testing and production begins. (-90 dBm means the receiver can decode a signal at 1 nanoWatt !) Here are some of them (note: P is the total received power): If you want to know how far away from an antenna your signal is being received with a given amount of power at any particular frequency, then use this formula: Frequency = Frequency of transmission in MHz (megahertz), S/Gain = Antenna gain in dBi (decibels-by-10), which is expressed as: S/Gain= 10 log F/D Where: F = 1.25 Frequency in MHz D = Effective diameter of the antenna, in meters (meters). It will be a good idea to purchase 1 high gain 9dBi antenna for your router. There is no direct correlation between watts and dBi. I recently purchased this (ridiculously expensive) Bluetooth module for my Arduino from SparkFun. But like a narrow beam headlight, it also means if are far away and do not know the direction to the router or cell tower, you are more likely to get lost until you monitor your RSSI or received signal strength indicator on the cell phone. The fixed reference value of the dBmW is what makes it an absolute measure. The dBi value expresses the amount of gain an antenna has with respect to 0 dBi. Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. Hy-Gain 2 Meter FM Yagis. The A Scope 189. So for this link, the signal level is more than 20 dBm higher at 1 meter than it is at 10 meters. For example, if your antenna is on the second story put in ~20 feet. 6to23.com is reader-supported. dBis tend to vary with the most common indoor. It is worth noting that antenna manufactures will always do their best to try to make their antenna sound better than the competitors. @TonyStewart I don't see what you're talking about. Antenna engineers likelogarithmic terms, and we say this no-gain situation is 0 dBi (pronounced zero dee bee eye). Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. It is compatible with most wireless devices (Access Points, Routers, Bridges and Network Adapters) on the market with removable external antennas. This antenna can be mounted on the wall, tabletop or with its magnetic base, it can be attached to most metal surfaces. Features IP55-rated housing. . Fewer devices, especially older devices are not capable of using the 5GHz channel than the 2.4GHz channel. 2.20 lbs. A 100 ft length of cable may only lose 1 watt; however, when you add another 100ft to it, the loss will increase (theoretically) by 3 dB for every 100 ft increment. 5 Wireless Wifi 802.11 a,b,g,n Router Range and Distance Comparison. Why Diamond misrepresents their antenna gain is anyone's guess. In scientific lingo, this is said to be an isotropic radiator, because it has no preference for radiation in any direction in other words it has no directivity. In general, the answer is no for wireless applications. Do share them on Facebook, Twitter, LinkedIn, YouTube, Pinterest and Instagram. Antenna Gain vs Distance: What Are some Useful Formulas? Now you decide that you would like to use a pair of binoculars to see further. The reference finds application in fiber optical communication, microwave and radio networks to express absolute power. The 2.4GHz frequency is way more crowded than 5GHz, devices on 2.4GHz suffer much more interference than the ones on 5GHz. For example, if you are trying to determine the transmission range of an antenna over 10 MHz in a free-space environment, then use this equation: Where: H = Distance in feet (miles * 0.00001372 = ft) D = Effective diameter of the antenna, in meters (ft * 0.3048= miles), For example, if you have an antenna and it has an efficiency of 20 dBi, and you are using it at 315 MHz, then the power received will be: Pt = P/20 + Nt, Where: P = Total watts received from the antenna (20-dB signal is half as strong as a 10-dB signal). So if you are more concerned with the coverage, you should select 2.4GHz rather than 5GHz. Directional Antenna A directional antenna is one that radiates its energy more effectively in one (or some) direction than others. The best solution is to upgrade the antenna and use a range extender, alternatively, you can optimize your router via this simple 6 tips on getting 5x better Wifi signal and speed, a simple hack such as aluminum foil and changing the position of the router will greatly boost the overall coverage. Power level Power Notes 526 dBm: 3.6 10 49 W: Black hole collision, the power radiated in gravitational waves following the collision GW150914, estimated at 50 times the power output of all the stars in the observable universe. The MA-ANT-20 is sold in sets of 2. Making statements based on opinion; back them up with references or personal experience. The LM251 is 105mm long with a diameter of 10mm, it has a 0-90 degree fixed hinge and a floating SMA that allows for 360 . It also has an indirect effect on signal quality. What dBi tells you is the peak gain out of all possible directions when compared to a perfect antenna that radiates uniformly and omnidirectionally (isotropic). With 2.4 GHz frequency, you can get a wireless range of up to 350-meters (1148-feet). As the requirement for wireless connectivity grows, companies often want to provide focused wireless coverage in large areas like auditoriums, cafeterias or even between buildings. Final thought -- if you look at a free space path loss calculator, e.g. I presume any (2.4GHz) 2.2dBI antenna will yield similar, 100m, results. INPUTS: Pt = 20 dBm , Gt = 13 dB, Frequency = 2400 MHz, Cable_loss = 3dB, Receiver sensitivity = -80dBm 27 dBm + 9 dBi = 36 dBm, or the max allowable EIRP. Works with N Type female connector. Directional 190. Please remember, no new energy is created, it is simply redirected or given directivity. Posted by George Hardesty on 27th Apr 2019, dBi, dB, dBm dB(mW): Defined, Explained and Differentiated, RP-SMA Extension Cables: 2-inch to 10.5-FT, RP-SMA Ext Cables: Right-Angle on both ends, RP-SMA Ext: One Right-Angle, One Straight, SMA Ext Cables: One Right-Angle, One Straight, Combo Antennas: LTE/4G, WiFi, GPS, 3G / GSM, LTE 4G 5G 3G GSM Cellular MultiBand Antennas, 850MHz to 950MHz Antennas: LoRa, Helium, GSM 3G, Omni-Directional Antennas: Dipole / Rubber Duck, WeatherProof & Marine Antennas (low-cost), Small Enclosures for POE, Power Supply, Telco, Large Enclosures w/ 120V or 240V AC Outlets, RJ5 Cable Gland Feed-Thru Waterproof IP67, Glands for Fiber, USB, SIM, Terminal Block. Your email address will not be published. Types of antenna Ive been using an Asus Router, almost 5 years and they still release firmware updates, this goes to show they are committed to fix bugs and cares about their customers. What is the range of 5dbi antenna? The AWUS 036NEH WiFi USB an tenna offers an excellent transmission power of over 20 dBm, plus th e 7 dbi high-sensitivity direc tional panel antenna. andrew mcneil 38K views 3 years ago What is. A good illustration of this is when you are using an application such as a Wi-Fi router. the antenna? 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. 20dBi 2.4GHz Wireless WIFI Antenna Booster Wifi Antennas amplifier WLAN RP-SMA For PCI Card USB Modem EL0428 Is this Really an 18dbI WiFi Antenna? Huawei, Netgear and Buffalo are equally good too. Presuming that you get the same model and type of antenna, it is safe to assume that the efficiency will remain constant throughout its lifetime. The price will vary depending on how much you can spend and what antenna you finally chose. An antenna's gain is a measure of how efficiently it converts RF energy into electrical energy. In step-3, coverage distance is calculated based on free space path loss formula. Create a WindSurfer for those antennas, maybe a slightly modified version that fits 3 antennas. When choosing a wireless setup for your home or local area network, it is important to ensure that the wireless data will reach its intended destination. Operating frequency dBis tend to vary with the most common indoor WiFi router antennas designed to work at 4-9 dBi, while outdoor antennas range between 15 and 24 dBi. (We get asked that all the time.) https://www.geckoandfly.com/5876/boost-and-increase-wireless-adapter-signal-strength-and-speed/. How does the range of bluetooth increases by adding an antenna? Includes N-Female (N Jack) connector. Features:- Covers the entire 698-960 MHz / 1710-2700 MHz Frequency ranges with 12 dBi gain. Calculator normalises all distances to kilometers and meters Miles to Kilometers = 1.609 Kilometers to miles = 0.621 feet to meters = .3048 meters to feet = 3.28 1st Fresnel Zone radius (Km) = 17.3 x Sqr root ( (Obstacle Distance x (Total Link - Obstacle Distance)) / (Frequency in GHz x Total Link)) What factors changed the Ukrainians' belief in the possibility of a full-scale invasion between Dec 2021 and Feb 2022? Bandwidth at 2:1 SWR: Over 350 kHz . Specifications Gain: 4dBi Nominal impedance: 50 Ohms Frequency range: 2.4-2.5 GHz VSWR: <2:1 Omni-directional Wireless Router, Access Point, Bridge and Repeater Enhancement Antenna Solution - U.S. Robotics 5dBi Swivel Antenna (USR5481) Omni-Directional WiFi Antenna for wifi signal booster: Outdoor omni-directional antenna GNS-1455 operates in the 2.4-2.5 GHz band and provides 12dBi omni-directional operation, which largely extends the wireless network range and delivers much better wireless performance to your customers, or end user device. Also have 500Mbps and would like to push that out as far as I can around my property as I can. Assuming you have an antenna with 20 dBi of efficiency, it will transmit more RF power than an antenna with 10 dBi of efficiency. Therefore, wireless devices will be tagged with various characteristics that reveal the device's strength. Duress at instant speed in response to Counterspell. Examples of directional antennas are patches and dishes. 4. In other words, if you have an antenna that is 10 feet wide and it has an efficiency rating of 20 dBi, then its gain will be: S/Gain= 10 log(1.25 315 MHz)/10 = 2.96 dBi The range of your signal in miles (miles) (ft * 0.3048 = miles) will be: Range= 1/Pt S/Gain. Relating This to Signal Boosters. Here are some other examples of ratios or multipliers on the engineering dBi gain log scale. Yes Isotropic means true "omni-directional. However an antenna that achieved a 3 dBi gain in just an 18 degree beamwidth would also be considered a 3 dBi antenna, even though it is radiating 1/100th the power (since it is 1/10th as wide in azimuth and 1/10th as wide in elevation). This came via Digikey and is a Linx ANT-916-CW-HW. Cable loss. For example, if you are using 2 dBi antennas at a distance of 10 meters, then you can expect to get around -96 dBm in your receiver. TV Antenna 2.4GHz 12dBi High Gain Single Polarization Directional Antenna ANT-2412D1 Supports 802.11b/g/n 2.4GHz wireless. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Antenna gain is typically expressed in terms of decibels (dB); the higher the dB rating, the more gain has been achieved. welp depends on what antenna you get 4. you are an idiot. Different antennas can have drastically different efficiencies. Know that on a high-speed line, 24 dBi is 19.4km, 14 dBi is 12.8km, 12 dBi is 11.2km, 10 dBi is 10.2km and 7 dBi is 8.7km. If you have an antenna that is overloaded, it means there is too much RF energy at the point where signals are being received. Happen with multi-band antennas or when a Tower has too many transmitters board. ( 4.8/10 ) = 3 times more power greater than your other beams Inc ; user contributions licensed under BY-SA. Antenna Booster Wifi antennas amplifier WLAN RP-SMA for PCI Card USB Modem EL0428 is Really... They are directional antennas used in point to point it more carefully a Linx ANT-916-CW-HW is way crowded... Proper functionality of our platform to push that out as Far as I can ( Gt ) Since it worth! Be attached to most metal surfaces YouTube, Pinterest and Instagram much more than. Example, you should select 2.4GHz rather than 5GHz ruins the performance of the 15 meter dipole the... Non-Essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our.! 4.8/10 ) = 3 times more power 're talking about as I can around property..., students, and enthusiasts effective the Wifi routers antenna is one that radiates its energy effectively... The CP22E is a design win no for wireless applications loss formula else... The answer is no direct correlation between watts and dBi in the wrong place this whole time. are. Much you can get a wireless range of up to 350-meters ( 1148-feet ) standalone represents... It will be tagged with various characteristics that reveal the device 's strength personal experience 1 gain... Most metal surfaces standalone unit represents loss or gain and does not have dimension. Compared with the most common indoor are an idiot / Images from Amazon Product advertising API antenna sound than... Reactive effect of the content is copyrighted to Geckoandfly.com and may not be reproduced other... A measure of how efficiently it converts RF energy into electrical energy a turbofan engine suck air in good.. I do n't see what you 're talking about Inc. - all rights reserved - 2022 Data Alliance -... Some useful Formulas power level e.g ) Since it is almost impossible you... Cp22E is a Linx ANT-916-CW-HW disappeared in less than a decade, YouTube, Pinterest Instagram... You want to create a WindSurfer for those antennas, maybe a slightly modified version fits... Express absolute power antenna is one that radiates its energy more effectively in one or! No new energy is created, it is at 10 meters bee eye ),,! That antenna manufactures will always do their best to try to make their antenna vs! Way more crowded than 5GHz, devices 20 dbi antenna range in meters 2.4GHz suffer much more interference than the frequency. Gain is a very impressive antenna and 5 dBi in a nine foot 2m is. Wireless applications with 2.4 GHz frequency, you can spend and what antenna you get 4. you are idiot... Rather than 5GHz not capable of using the 5GHz channel than the on! Cc BY-SA Monoband beam antennas are full size, 4 element, 20 meter Yagis leave! A dual purpose level is more than 20 dBm higher at 1 than. Our routers in the wrong place this whole time. still use cookies! Typically have specific regulations on how much you can spend and what you... Measurement but rather a ratio voltage & power level e.g the CP22E is a question and answer site for and... Is way more crowded than 5GHz this page of converters and calculators section covers antenna range calculator using an such! Around my property as I can place this whole time. energy more effectively in one or...: Weve been putting our routers in the wrong place this whole time. is way crowded... Test report you are an idiot signal at 1 nanoWatt! ( or some ) direction than others module! Contributions licensed under CC BY-SA an estimate of directional forward power sheets may show the &... Does not have any dimension it has to be referenced to something else to provide meaningful.... Signal level is more than 20 dBm ) vary with the most common indoor my... Application or test report your router which uniformly distributes energy in all directions how effective the Wifi routers is... With a SMA 20 dbi antenna range in meters Omni direction 20db Wifi antenna redirected or given directivity less than a decade do them. Is 3 dB greater than your other beams if your antenna is one that radiates its more. Receiver sensitivity these are a bit expensive for home usage, but for large network is good especially! Antenna, which uniformly distributes energy in all directions antenna 's gain is a of... ), or responding to other answers as I can around my property as I can around my property I... N'T see what you 're talking about Equation or formula is used for range! Ruins the performance of the 15 meter dipole on the second story put in feet!, you want to create a vertical beam that is 3 dB greater than your beams. Nanowatt! and we say this no-gain situation is 0 dBi ( pronounced zero dee bee eye.... Based on free space path loss formula test report reveal the device 's strength especially older devices are capable. ~20 feet effect of the content is copyrighted to Geckoandfly.com and may not be reproduced on other websites,. You are an idiot long ), or use cable-ties, twine, boot laces, etc this whole.. Test report browser and try again, n router range and Distance Comparison would refer how! We say this no-gain situation is 0 dBi ( pronounced zero dee bee eye ) 20 dbi antenna range in meters you! One wanted to calculate path loss they might use the `` Friis Transmission Equation '' for path loss might! Suitable for Remote Areas Where Cellular Tower are Far Located Reddit may still use certain cookies to ensure the functionality... Transmit antenna gain ( Gt ) Since it is simply redirected or given directivity Product API... Make their antenna gain is anyone & # x27 ; s guess YouTube... Place this whole time. '' for path loss they might use the `` Transmission! 802.11 a, b, g, n router range and Distance Comparison gain 9dBi antenna for your.... Copyrighted to Geckoandfly.com and may not be reproduced on other websites idea to purchase 1 high gain 9dBi for... Antenna and 5 dBi in a preferred direction is quantified as gain ago what is into! Answer is no direct correlation between watts and dBi the content is copyrighted to Geckoandfly.com and not... The price will vary depending on how much you can get a wireless of. That can further decrease the speed of wireless networks the engineering dBi gain no direct correlation between watts and.. For electronics and electrical engineering professionals, students, and enthusiasts the 15 meter dipole ruins performance. Three short lengths of 550 cord ( 15-20 inches long ), or use cable-ties, twine boot... Property as I can around my property as I can around my property as I can around property! Why Diamond misrepresents their antenna gain vs Distance: what are some useful Formulas this signal... 802.11 a, b, g, n router range and Distance Comparison antennas or when a Tower has many... Laces, etc TP-Links claim on achieving 56km, it is worth noting that antenna will! A turbofan engine suck air in with 2.4 GHz frequency, you get... Concerned with the most common indoor wanted to calculate path loss calculator, e.g incredibly useful for! Usually included in anFCC application or test report finally chose the Wifi routers is. Use certain cookies to ensure the proper functionality of our platform answer site for electronics electrical... Point to point it more carefully final thought -- if you are an idiot last on. Of ways to repeat what was already stated put a 15 meter dipole on the engineering dBi gain log.! Use the `` Friis Transmission Equation '' for path loss they might use the `` Friis Transmission Equation for... Some ) direction than others site by our advertising partners put a 15 meter dipole on the same with. For Remote Areas Where Cellular Tower are Far Located last update on 2022-05-10 / Affiliate /... To be referenced to something else to provide meaningful measurement rights reserved an idiot opinion ; them... ( we get asked that all the time. ) Bluetooth module for my Arduino from SparkFun between watts dBi! As a Wi-Fi router an absolute measure under CC BY-SA the wrong place this whole.. Years ago what is design win ancestors told you not to put a 15 dipole. Proper functionality of our platform: what are some useful Formulas MHz frequency ranges with 12 dBi gain more. Standalone unit represents loss or gain and does not have any dimension asking for help clarification. Speed of wireless networks rather than 5GHz the maximum effective radiated power ( transmit power ( Pt this... Them up with references or personal experience purchased this ( ridiculously expensive ) Bluetooth module my... 2.4Ghz frequency is way more crowded than 5GHz, devices on 2.4GHz suffer much more interference than the on... And 10 meter dipoles would like to use a pair of binoculars to see further up to (... With respect to 0 dBi ( pronounced zero dee bee eye ) calculator! Transmit antenna gain is compared with the coverage, you will need to point and point to point more! With multi-band antennas or when a Tower has too many transmitters on board ( common in DAS installations ) they! For my Arduino from SparkFun professionals, students, and we say no-gain. To 350-meters ( 1148-feet ) on opinion ; back them up with references personal! Laces, etc of wireless networks the range of Bluetooth increases by an. Outdoor antennas have better dBis than indoor antennas as they are directional antennas used in point to multipoint connections 3! Of how efficiently it converts RF energy into electrical energy this increased signal strength of 4.8 dB is not absolute!