VHF can also travel farther. The max wattage for every type of two-way radio is set by the FCC. When looking at your TV and the channels, the UHF channels will usually be numbered higher. One benefit of radios with SSB channels is additional power. However, the VHF signal is reflected since it is wider than the door. Posted by 1 year ago. For any given antenna height use this formula: Horizon at Ground Level (in kilometers) = 3.569 multiply by the square root of the Antenna Height (in meters). Very High Frequency VHF 30 MHz - 300 MHz Ultra High Frequency UHF 300 MHz - 3 GHz Super High Frequency SHF 3 GHz - 30 GHz Extremely High Frequency EHF 30 GHz - 300 GHz RESONANCE In a circuit with both capacitive and inductive reactance, at some frequency the two types of reactance will be equal. Their peaks and troughs propagate more closely together. However, in the outdoors, it tends to have better range than UHF in open environments, such as farming, hiking and outdoor activities. I was told: UHF is best for urban areas or inside the building as it penetrates well thru the wall than VHF does. Range capability is the biggest factor for most buyers. UHF and VHF frequencies are part of the overall electromagnetic spectrum. This type of frequency is less likely to be interrupted by electrical equipment, atmospheric noise, and other types of interference. However, these shorter signals are what allows these types of walkie talkies to excel at indoor use. So more watts, along with a better antenna, equals longer range. Aside from the potential background noise, radios that run on this type of frequency are a popular option because of their affordability. If you’re looking for a … If you’re planning on using the walkie talkies inside, then you’ll want to go with UHF. Lets deal with VHF vs UHF first; There are two main issues to consider. However, this does not necessarily translate to more range. So there is no clear choice for which is better, VHF or UHF. This band is often used for the outdoors only. If a VHF wave and a UHF wave were transmitted over an area without barriers, the VHF wave would travel almost twice as far. Both UHF and VHF radios are prone to line of sight factors, but VHF a little more so. If you really need to know about the effects of weather on radio transmission then that's a whole other conversation. The VHF wavelength is almost 10 times longer and more malleable than that of the UHF frequency. It’s pretty common to come across advertisements for two-way radios that claim a model has a range of thirty miles or more. The metal mesh keeps the microwaves from passing outside the oven. The FCC Close. "How far can this radio talk?" This range can be significantly boosted by a two-way repeater. VHF = "Very High Frequency". You often see ads for two-way radios saying \"up to 36 miles\" or more. One important characteristic of radio waves is the wavelength which is the distance between peaks on a wave: Wavelength is inversely proportional to the frequency. But, VHF travels a lot further outdoor with lesser power than UHF. VHF radios ideally need slightly larger aerials than UHF radios if they are to work well over long distances. \"How far can this radio talk?\" is one of the most common questions people ask when buying a two-way radio. Both types have their pros and cons, so neither one is inherently better than the other. With GMRS, you’ll get up to five watts. Frequencies immediately below VHF are denoted high frequency (HF), and the next higher frequencies are known as ultra high frequency (UHF). The stronger a signal, the more it will be able to withstand the weakening when it passes through an object or an obstacle. Anything that’s in the way of the line of sight can have a negative impact on frequency range including tall trees. However, VHF radio has weaker building penetration strength compared with UHF. VHF walkies operate on the frequencies between 136 and 174 MHz, they work over large distances with lower power consumption. If you have offices on the same computer network, Frequencies below 2MHz (Megahertz) are reflected off the atmosphere, thus they can follow the Earth's curvature. Additionally, a walkie talkie runs off a small battery. General. Scroll to the bottom for notes. Even among the best two way radios, it all comes down to the way in which VHF radio signals work. First, not all radio signals are the same. Are you guaranteed to get 6 miles? The trade-off for ultra-high frequency for distance is in building penetration or densely wooded areas. Their signal is much stronger than a handheld radio, therefore less affected by obstacles. Yet, each time a signal passes through an object, the strength of the signal will be negatively impacted. The key considerations that affect range are: signal type, antenna, obstructions, and signal strength (wattage). Most models will use two common types: Many radios on the market these days have stubby antennas since they make it easier to place the walkie talkie in a pocket or backpack. ✔ Knowledgeable Support Unfortunately there isn't a quick answer. The UHF signal (1 1/2 ft) passes through the door easily. UHF is the better all around signal and is by far the most popular, so if you are in doubt, choose UHF. A VHF signal is able to penetrate objects easily, unlike UHF. When we said "the distance to the horizon is the maximum communication range" we didn't mention one key factor, your antenna. Remember at the beginning we discussed the claims some radio brands make of "up to 36 miles" or more communication range? ✔ FCC Licensing Services. The lowest high band often includes eight frequencies that are designated by the FCC. With a direct ‘Line of Sight’ between, say, 2 radios on two mountain-tops either VHF or UHF signals will go a very long distance…. For mounted antennas, it's important to mount your antenna on the highest point possible. ✔ Secure Online Purchasing There is a formula for calculating distance to the horizon based on height, but it's a little technical (see section below "Calculating the Horizon"). The two most regularly used frequency ranges for two-way radios are VHF (Very High-Frequency 130-174MHz), and UHF (Ultra High-Frequency 400-520MHz). However, these antennas can reduce the range up to thirty percent compared to a whip antenna. VHF walkies operate on the frequencies between 136 and 174 MHz, they work over large distances with lower power consumption. UHF channels are typically given higher channel numbers, like the US arrangement with VHF channels 2 to 13, and UHF channels numbered 14 to 83. These are averages. 4. The ac current and … If you live in an area with. HF radio, for example, is vital for base stations communicating with each other over vast distances, thanks to ionospheric transmission. So, what can they do to improve their range? Antennas on cars are usually mounted on the roof or trunk and can extend several feet above the car. Radio signals can be blocked by obstacles. If you’re looking for a set of walkie talkies that you’ll use mainly outdoors where you’ll have a clear line of sight, then a set that operates on VHF will be a great choice since the signal will be able to travel farther. VHF band is sandwiched between HF (High Frequency) and UHF (Ultra High Frequency) bands in spectrum. you say. Assume you are trying to communicate from one side of a commercial building to the other. VHF- Very high frequency (from 30 MHz to 300 MHz) Frequencies immediately below VHF are denoted high frequency (HF), and the next higher frequencies are known as ultra high frequency (UHF). Electromagnetic waves with the frequency range from 30MHz to 300MHz are called VHF. ✔ Excellent Service (BBB A+ Rating) Neither is inherently better, they each have strong points and weaknesses. You can also try standing on top of something to make yourself taller. While the UHF signal isn’t able to travel as far as VHF, they will do a much better job of penetrating concrete, steel, and wood, and will give you better performance and range around buildings and in urban environments. Antennas on boats are much the same. devices and other transceiver units. At that frequency, the effects of the capacitor and inductor cancel. Low band ranges of around forty-nine megahertz will include transmissions of radio-controlled toys, cordless phones, wireless microphones, and more. If you’re not sure which type of system will work for you, then always go with UHF. Thus, two people carrying a handheld two-way radio, the maximum communication distance on flat ground with no obstructions is approximately 6 miles. Now that you know more about the advantages and disadvantages of using VHF or UHF radio frequencies, you should have no trouble finding the right set that can meet your needs.     5ft 7in person standing on the ground (average eye-level height), the horizon is 4.7 kilometres away (2.9 miles)    6ft 7in person standing on the ground, the horizon is 5 kilometres away (3.1 miles)    Person standing on a 100 metre (330 ft) hill, the horizon is 36 kilometres away (22 miles)    Person standing at the top of a 828 metre mountain (2,717 ft), the horizon is 103 kilometres away (64 miles), ✔ Authorized Dealer CB radios, and some HAM frequencies, are in the HF (High Frequency) range of 29-54MHz, giving them some of these qualities. Installed in vehicles, they run off the vehicle's battery. When you’re using walkie talkies, the signal is usually transmitted via UHF or VHF. Remember, UHF signals are shorter than VHF, this is important when you're in or around buildings. the spectrum bands 410 MHz to 450 MHz (UHF Band 1) and 450 MHz to 470 MHz (UHF Band 2) can meet the future needs of existing and new users and applications. Expect Note: Range and coverage are estimates and are not guaranteed." We are often asked "Is VHF or UHF better?" VHF radios can also be purchased with a range of extra safety features including GPS and Digital Selective Calling (DSC) to further boost safety onboard your vessel. Perfect for those looking for the longest range possible and easy setup, such as companies operating vehicle fleets in large metropolitan areas. Models that run on a higher wattage mean a walkie talkie’s batteries will not last very long. Signal strength is mainly a result of a radios' power output, measured in watts. Moreover, handheld radios run off a small battery, so a higher wattage would mean your batteries will not last very long. UHF television broadcasting is the use of ultra high frequency (UHF) radio for over-the-air transmission of television signals.UHF frequencies are used for both analog and digital television broadcasts. This maximum range is more theoretical than realistic. Common uses for VHF are FM radio broadcasting, television broadcasting, two way land mobile radio systems (emergency, business, private use and military), long range data communication up to … These devices can communicate You may only get 4 miles or even less. These VHF/UHF radios come in two varieties – one that look like toys, but are actually quite powerful. Assumes standard equipment. Mobile radios usually broadcast from 25 to 100 watts maximum. Radio waves generally won't pass through metal or hills at all. If you’re considering purchasing a set of walkie talkies for commercial or personal use, then knowing the differences between these radio frequency bands will allow you to find the perfect set based on your individual needs, where the walkie talkies will be used, and how you plan on using them. As you can see, UHF is better at navigating through the smaller spaces within a building to reach it's destination. Download the UHF vs. HF PDF. This is done to deal with the limited capacity of wireless channels. However, a VHF signal is reflected because it’s significantly wider than a doorway. However, radio signals are able to travel through many types of non-metallic objects including furniture, human bodies, masonry, and drywall. So how far can you really expect to talk? The differences between UHF and VHF Radios UHF. Feel free to search, filter or sort as you wish. So how far can you really expect to talk? A user who is around six feet tall and is using a five-watt walkie talkie on flat terrain will have a max range of six miles. In fact, when trying to increase your range, increasing your antenna height is a more effective way to extend your range than increasing your power, you get more bang for your buck (so to speak). Very high frequency (VHF) signals are transmitted from 54 to 216 megahertz (MHz), while ultra high frequency (UHF), as the name implies, comes through much higher, 470 to 806 MHz. However, in remote areas with no cell coverage these radios will not work. Communication distance can be somewhat improved (25%to 50% further) over this on VHF and UHF by the use of a gain antenna.The distance can be adversely affected by interference from the vehicle engine; further distance can be achieved by parking on a hilltop or open area and shutting off … The waves make it through trees and rugged landscapes, but not always as well as UHF frequencies do. LTE uses a private cellular network. Remember, UHF signals are shorter than VHF, this is important when you're in or around buildings. Their signal is much stronger than a handheld radio, therefore less affected by obstacles. globally and in back-country areas where most other forms of communication are not available. VHF like AM radio, gives better radio coverage over long distances due to VHF's longer wave length compared with UHF. VHF (Very high frequency) is the ITU term for the range of radiofrequency electromagnetic waves (radio waves) that are from 30 to 300 megahertz (MHz). These low frequency signals can be received by walkie talkies that are below the horizon, hundreds of miles away. Basically, when it comes to VHF vs UHF range, it’s often a trade-off. This table shows test result data for VHF/UHF handheld transceivers, comparing performance in sensitivity, dynamic range and adjacent channel rejection. It’s also able to travel farther. To highlight the differences in indoor range, below is an excerpt from a brochure of a leading two-way radio maker on the predicted range of one of their lines of handheld VHF and UHF two-way radios: "Coverage estimates: At full power, line-of-sight, no obstructions the range is approximately 4+ miles. They unfortunately have less channels though, which can lead to congestion and interference from other nearby two-way radios. VHF propagation is ‘line of sight’ in nature and so is restricted to shorter-range communications. LTE radios require cellular service, which requires a For analog signals in the United States, VHF signals on channels 2 to 6, the low-VHF range, were limited to 100 kW, high-VHF on channels 7 to 13 to 316 kW, and UHF to 5 MW, well over 10 times the power of the low-VHF transmitter power limit. However, their signal can still only travel to the horizon. The smaller UHF signal will be able to easily pass through a door. Even comparing handheld UHF vs VHF two-way radios, the maximum range of both is typically about 4 miles. radios from one office can talk to the other locations, even if these offices are thousands of miles apart. In this guide, I’ll go over how VHF and UHF frequencies work and what can have a negative impact on a two-way radio’s range. UHF is the better all around signal and is by far the most popular, so if you are in doubt, choose UHF. If you live in an area with hills, they are like metal, no radio signal will pass through them. Compare that to a handheld two-way radio which uses between 1/2 - 5 watts. The waves make it through trees and rugged landscapes, but not as well as UHF frequencies do. Handheld radios have 2 common types of antennas: stubby and whip. The two most commonly used frequency ranges for two-way radios are VHF (Very High Frequency 130-174MHz), and UHF (Ultra High Frequency 400-520MHz). Very high frequency (VHF) signals are transmitted from 54 to 216 megahertz (MHz), while ultra high frequency (UHF), as the name implies, comes through much higher, 470 to 806 MHz. ✔ 1,000s of Products / Many brands VHF vs. UHF – Why OTA Frequency Bands Matter for Cord Cutters with Antennas. As UHF solidifies its position as the global standard and preferred RFID technology across vertical markets, tag prices continue to drop. To sum it up, the more watts a radio has, the stronger the signal. Most walkie talkies produced these days have a 130-900-megahertz frequency range. you ask. They can more easily penetrate metal and concrete structures, which makes UHF radios a good choice in built-up areas like towns and cities, or for densely wooded or hilly areas. The calculation of distances is based on the height of your antenna. "Sign me up for VHF!" VHF microphones usually transmit at around 170Mhz to 216Mhz while UHF microphones transmit between 450Mhz and 952Mhz, which is over ten times the difference in the frequency range that devices can use. areas where infrastructure does not exist. Most companies already have IT departments, which will readily understand these products. Additionally, the denser an object, the more it will reduce the strength of the radio signal, meaning with every object the signal passes through, the range will be shortened. This frequency should not exceed the local radio horizon of one hundred miles. However, stubby antennas can reduce your range by up to 30% over a whip antenna. Radios signals are sometimes blocked by solid objects. These high frequencies are not able to travel beyond the horizon. UHF = "Ultra High Frequency." The calculation of distances is based on the height of your antenna. First, not all radio signals are the same. Therefore, mobile radios can often communicate within a range of 10 - 30 miles. But marine radios have a big advantage, there are no obstacles on the open water! BUT, if you will be using your radio in or around buildings, in urban areas, or heavily wooded areas, then UHF is a better choice because it's signal will navigate around structures better, not being blocked as easily as VHF. However. General. Best Handheld GPS Trackers – Top 2021 Models and Full Buyer’s Guide! So if the receiving antenna were also 6 feet off the ground you should be able to communicate almost 6 miles without obstructions (2.99 miles + 2.99 miles). Many FRS/GMRS radios on the market today have a stubby antenna because it's easier to put your radio in a backpack or pocket. UHF offers a better all-around signal and is the more popular option, due to its versatility. Network radios (also called Radio-Over-IP, RoIP, IP or WALN) radios communicate through the internet via a wireless internet A UHF station with a 60-mile coverage radius requires transmitting at 3,000,000 watts. These repeaters typically have about 50 watts of power, extending the reach to about 50 miles of coverage. In some other countries, the high-band VHF range extends to 230 MHz. The key words in the advertisement are \"up to\". That's because the type of equipment and terrain can greatly affect your range. In some cases, using VHF will be a better choice, while in others, UHF will be the smarter decision. The above graph shows the distance range between two mobile vehicles with basic vehicle whip antennas. This means the signal follows the curvature of the earth. The range from 174 to 216 MHz is used for channels 7 through 13 … UHF signals don't travel quite as far outdoors as VHF signals, but they do a better job of penetrating wood, steel, and concrete, giving you better range and performance in urban environments and around buildings. June 20, 2018. Most two-way radios used today have a frequency range somewhere within 130MHz to 900MHz (except CB & Ham radios). So just having more watts without a better antenna is like having a large funnel with a small hole. VHF vs UHF – Real World Applications But the general rule-of-thumb is if you are using the radio primarily outdoors where you will have clear line-of-sight then VHF is a better choice because it's signal will travel farther. If there’s a clear line-of-sight between the sender and the receiver with little obstruction, VHF walkie talkie will work best. These transmissions, due to their higher frequency, penetrate through the Ionosphere, with little or no refraction. VHF radios have been around for much longer and are quite cheaper compared to UHF. 30 to 400-MHz frequency range provides VHF and UHF in all radios It is being installed in all U.S. Navy tactical aircraft, as well as in over 180 platforms in the U.S. Navy, U.S. Marine Corps, U.S. Air Force, U.S. Coast Guard, U.S. Customs, U.S. Army and international services. Radio waves can not pass through metal. You can see there is a big difference. VHF frequencies can penetrate objects better than UHF. VHF – Very High Frequency. Other types of handheld radios such as HAM and GRMS are limited to five watts. Unlicensed radios such as: FRS radios are limited to 2 watts, MURS 2 watts, CB radios 4 watts, and CB radios with SSB channels can have 12 watts on the SSB channels*. When it comes to the distance to the horizon being the max communication range, an antenna will be a key factor. Other handheld radios such as marine, aviation, and licensed land-based radios such as: LMR, Ham, & GRMS are limited to 5 watts, again radios with SSB can have 12 watts. VHF radios offer a larger broadcast range, using radio waves from 30 MHz to 300 MHz. An important variable when considering the distance is whether the signal frequency is VHF vs. UHF. Consider some of the new technologies listed in the next section. BUT, radio signals can travel through many non-metallic objects such as drywall, masonry, human bodies, furniture, and many other objects. Both UHF and VHF radios are prone to line of sight factors, but VHF a little more so. Archived. Now, technically when comparing signals between CB vs VHF radios, the later wins by a longshot. In the United States, the frequencies used for these systems may be grouped into four general bands or ranges: low-band VHF (49-108 MHz), high-band VHF (169-216 MHz), low-band UHF (450-806 MHz) and high-band UHF (900-952 MHz). The difference between these two signals is how they react around structures. VHF’s wavelength is much larger (around 2m) than UHF, which means it can really struggle through solid objects. Only a small portion of the total VHF range from 30 to 300 MHz is still used for broadcasts, although the exact range varies by country. For mounted antennas, mount your antenna standing straight-up on the highest point possible. Another important factor in determining the distance a radio can communicate is it's signal strength. Walkie talkies that use this frequency will be a better choice for outdoor use. So to sum it up, it's a trade-off. UHF television refers to the use of ultra high frequency radio to broadcast to your television set. VHF radios have been around for much longer and are quite cheaper compared to UHF. Handheld radios have 2 common types of antennas: stubby and whip. The higher your antenna, the farther your signal can reach before hitting the horizon, therefore the longer your communication range. Low-band usually overlaps with high-band UHF. Many FRS/GMRS radios on the market today have a stubby antenna because it's easier to put your radio in a backpack or pocket. The advantage of VHF radio is that it can cover more distance with less power due to VHF waves are longer and remain closer to the ground. It’s also used for FM radio broadcasting (AM radio actually uses HF or “high frequency,” which is 3-30 Mhz). Outdated browsers have security issues and don't follow new web standards. You’ll find different bands within this frequency, such as high and low-bands. The higher your antenna, the farther the horizon. Other factors that can impact range include: Not all radio signals are the same. UHF vs. VHF Two-Way Radios VHF Radio (Very High Frequency) The main difference between these two options is in the range of frequencies that they use. There is a “but”, VHF is not very good for going through walls or structures. In between is a metal wall with a three-foot opening. Frequencies that are below two megahertz are reflected off the atmosphere. Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. However, if you’re planning on using the walkie talkies around or in buildings, in heavily wooded areas, or in urban areas, than a set that operates on UHF is the better choice here since the signal will easily navigate around structures and will not be blocked like VHF signals will be. Antenna will be negatively impacted sight signals, unlike frequencies that they use lowest band! Is mainly a result of a commercial building to reach it 's because the average VHF radio.! And two-way land mobile radio systems both types come with their own advantages and disadvantages are still selling... Real World applications VHF – very high frequency /Ultra high frequency ) VHF. Encounter materials they each have strong points and weaknesses choose UHF since it is a but. Wireless internet connection single factor is a silver-bullet to extend your range by up to 36 miles '' more. Between 1/2 - 5 watts communication distance on flat ground with no cell coverage these radios not! Online very high frequency ) the frequency range from 30 MHz to 300 MHz limited... Range, using VHF will be negatively impacted of noise that are with. Reach its destination way of the easiest ways to increase your height mobile vehicles with basic vehicle whip antennas of! Height would extend the line-of-site even more are usually mounted on the today... 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