What Affects My WiFi Range?

WiFi has become the backbone of our digital lives. From streaming movies to conducting business meetings, we rely heavily on the stability and range of our WiFi networks. However, have you ever wondered what affects the range of your WiFi signal? In this blog, we delve into the intricate factors that determine WiFi range and how they shape our connectivity experience.

Transmit Power of the WiFi Access Point

The transmit power of a WiFi access point refers to the strength at which it sends signals to communicate with devices. Essentially, it determines how far the signal can travel before it weakens to the point where it’s unusable. Access points with higher transmit power can cover larger areas, thus extending the WiFi range. 

Higher transmit power doesn’t always equate to better performance. In densely populated areas or environments with many access points, high transmit power can lead to interference and network congestion. Finding the right balance between transmit power and network density is crucial for optimal WiFi performance.

Number of Antennas on the Access Point

Antennas play a pivotal role in the propagation of WiFi signals. Access points equipped with multiple antennas can employ techniques like beamforming to focus signals in specific directions, enhancing coverage and range. Additionally, having multiple antennas enables the access point to support multiple input multiple output (MIMO) technology, which improves data throughput and reliability.

The orientation and placement of antennas also impact signal propagation. Antennas positioned vertically typically provide better coverage horizontally, while antennas oriented horizontally excel at vertical coverage. Understanding the antenna configuration of your access point can help optimize signal coverage for your specific environment.

The Frequency at Which It Broadcasts WiFi Signals

WiFi signals operate on two main frequency bands: 2.4 GHz and 5 GHz. The choice of frequency band significantly influences WiFi range and performance. Generally, lower frequency bands like 2.4 GHz offer better range but suffer from higher interference due to crowded airwaves, while higher frequency bands like 5 GHz provide faster speeds but have shorter range and are more susceptible to obstructions. 

Selecting the appropriate frequency band depends on the specific needs of your network and the environment in which it operates. In environments with numerous obstacles or interference sources, utilizing both frequency bands through dual-band or tri-band routers can help mitigate connectivity issues and improve overall performance.

Obstructions Around the Environment

Physical obstacles such as walls, furniture, and appliances can attenuate WiFi signals, reducing their strength and range. Materials like concrete, metal, and brick are particularly effective at blocking WiFi signals. The distance and density of obstructions between the access point and connected devices directly impact signal quality and coverage. 

To optimize WiFi coverage, strategically placing access points and antennas in locations with minimal obstructions can mitigate signal interference and improve overall range. Additionally, using signal boosters or range extenders can help bridge coverage gaps caused by obstructions, ensuring consistent connectivity throughout your space.

Other Electronics in the Environment

Electronic devices such as microwaves, cordless phones, and Bluetooth devices emit electromagnetic interference that can disrupt WiFi signals. This interference can manifest as signal degradation, packet loss, or intermittent connectivity issues, affecting the overall range and performance of the WiFi network. 

Minimizing interference from other electronics involves identifying and relocating conflicting devices away from the WiFi access point or using shielding techniques to mitigate their impact. Additionally, leveraging WiFi channels with less interference and employing technologies like dynamic frequency selection (DFS) can help mitigate interference and optimize WiFi performance.

Stay Up to Date

Regular firmware updates and maintenance are essential for keeping WiFi access points and devices up-to-date with the latest security patches, bug fixes, and performance enhancements. Outdated firmware can introduce vulnerabilities and compatibility issues, compromising network stability and performance.

Establishing a routine maintenance schedule and staying informed about firmware updates from manufacturers can help ensure optimal WiFi performance and mitigate potential security risks. Additionally, monitoring network performance metrics and conducting periodic assessments can identify areas for improvement and optimization, ensuring consistent and reliable WiFi connectivity.

Understanding How Cell Towers Work

Those towering structures that dot our landscapes, play a crucial role in ensuring seamless wireless communication. From transmitting radio signals to our mobile devices, cell towers have a defined range that varies due to several factors. Gaining some insight into how cellular towers function can help you to better understand how you might improve signal strength on your cellular devices. 

Cell Tower Height and Structure

Cell towers are vertical structures ranging from 100 to 400 feet in height. Equipped with antennas, they transmit radio signals to mobile devices within their reach. The average maximum usable range of a cell tower is 25 miles, with some towers capable of reaching up to 45 miles. However, the effective coverage radius typically falls between 1 to 3 miles, and in urban environments, it can be as low as 0.25 to 1 mile.

Factors Influencing Cell Tower Range

  1. Spectrum:
    • Different radio frequencies impact the distance a signal can travel.
    • Higher frequencies carry signals over shorter distances, while lower frequencies provide a larger coverage range.
    • Spectrum licensing to wireless carriers influences the efficiency and reach of a cell tower’s signal.
  2. Network Capacity:
    • Wireless networks are designed to meet specific traffic demands and subscriber density.
    • Transitioning from 3G to 4G and now to 5G has led to a decrease in cell tower radius due to increased demand for high-bandwidth applications.
  3. Terrain:
    • Natural and man-made obstructions like mountains, hills, and buildings affect signal reach.
    • Flat terrains allow for longer-distance transmission, while hilly areas may limit a tower’s range to a few miles.
  4. Transmission Power:
    • The power at which a cell tower transmits signals influences its reach.
    • Lower frequency signals, like 600 MHz, cover a greater distance, while higher frequency signals, such as 2.5 GHz, have a shorter reach.

Coverage Area

A cell tower’s coverage area can range from 3 to 50 square miles. The coverage radius, typically 1 to 4 miles for 4G LTE and 5G towers, assumes a three-sided antenna array for 360-degree coverage. Higher frequency signals necessitate denser tower placement for consistent service due to their shorter reach.

To gain a deeper insight into the impact of spectrum on the range of cell towers, we can examine the reach of various frequency bands in an open environment. The following diagram illustrates the coverage radius of cell towers using low-band frequencies (600 MHz, 700 MHz, 800 MHz), mid-band frequencies (2.0 GHz, 2.5 GHz, 3.7 GHz), and high-band frequencies (millimeter wave / mmWave).

Source: Crown Castle

How Cellular Antennas Can Help Improve Your Signal

Cellular antennas play a pivotal role in ensuring that your mobile or fixed wireless access (FWA) modem maintains a strong and stable connection to the nearest cell tower. Understanding the mechanics of these antennas, particularly the differences between omnidirectional and directional styles, can shed light on how they contribute to optimizing signal strength.

Omnidirectional Antennas

Omnidirectional antennas are designed to broadcast and receive signals in a 360-degree pattern, creating a spherical coverage zone. These antennas are commonly used in urban areas where cell towers are spread out and can be located in various directions. The advantage of omnidirectional antennas lies in their ability to provide reliable coverage in all directions, making them suitable for scenarios where the location of the cell tower may change frequently or is not precisely known.

These antennas use a vertical radiating element and ground plane to emit and capture radio waves in all directions. The radiating element is usually a vertical rod or whip that sends and receives signals horizontally, ensuring consistent coverage across the entire circumference of the antenna.

Directional Antennas

On the other hand, directional antennas focus their signal in a specific direction, offering a more concentrated and powerful connection. These antennas are beneficial in rural or suburban areas where cell towers may be farther away or concentrated in a specific direction. By directing the signal towards the cell tower, directional antennas can effectively enhance the signal strength and quality.

Directional antennas use a reflector and director elements in addition to the radiating element. The reflector bounces signals back towards the radiating element, while the director elements focus the signal in a specific direction. This concentrated approach allows for a more robust connection over longer distances, making directional antennas ideal for improving signal strength in challenging environments.

A Move Towards Enhanced Connectivity

As we delve into the nuances of cellular technology, understanding the impact of these factors becomes imperative for optimizing coverage and enhancing connectivity. Whether utilizing omnidirectional antennas in dynamic urban landscapes or employing directional antennas to strengthen signals in rural expanses, the mechanics of these technologies underscore their vital role in maintaining a robust and reliable connection. As technology advances, our grasp of these elements will continue to evolve, propelling us toward an era of even more efficient and widespread wireless communication.

Testing Verizon C-Band in New York City

Verizon’s new 5G network is live and PCMag just tested it out in New York City. In summary, C-Band made their connections about 50% faster, once they were able to find the signal. They also noted less congestion on the network, which is likely due to it still being so new. 

Starting this past Wednesday, Verizon launched its new form of 5G in 46 cities. AT&T did also, but only in eight cities. 

While PCMag reports the Verizon service being noticeably improved, it didn’t measure up to T-Mobile’s citywide “5G Ultra Capacity”— at least, not yet. T-Mobile currently has the most coverage in New York City and the best performance also in comparison to its competitors. 

Looking at reports from other cities, it seems that may not be the same as in New York City. Per PCMag’s report, “Redditors are busy posting spectacular C-Band speeds, including 859Mbps down in Los Angeles, 586Mbps outside Pittsburgh, and 413Mbps in Indianapolis.”

In order to test the C-Band, the PCMag team used the new Ookla WIND software. This is a carrier-grade package that runs on altered Samsung Galaxy S21+ phones. WIND’s Pro version, which the company supplied for testing, shows all the details of frequency band use you could ever need. It also lets testers build complex setups with voice, data, text, and video tests.

Verizon’s C-Band was a little hard to find during the New York tests. They ended up being able to use C-Band only on sites in two cities – Forest Hills and Kew Gardens. In other locations like East Harlem, their phone had refused to connect to C-Band, despite Ookla having identified the location as having C-Band available. It’s possible that some connections are being blocked by the carrier, or perhaps something to do with technical interference.

PCMag also addressed the “exclusion zones” that carriers agreed to with the FAA. Some of the exclusion zones are around JFK and LaGuardia airports. These are some of the busiest airports among a part of the city that is populated by about 2.3 million people. This is the same case for areas like Chicago, Dallas, and San Diego. Folks here unfortunately don’t have the benefits of the new 5G because of interference risks with aircraft altimeters

Per Verizon, the exclusion zones are a rectangle 2 miles long extending from the end of each airport runway. In one case during the tests, they were unable to find C-Band in an arc spanning from 4 miles southeast to 3 miles southwest of the end of the LaGuardia runway. That area covers many of Queens’ densest neighborhoods. Unexpectedly, though, they found more millimeter-wave in the exclusion zone than they expected to. 

“While the super-fast, short-range technology didn’t blanket the area, it kept popping up here and there throughout Long Island City, Astoria, Sunnyside, and Elmhurst, giving a huge boost when I could find it,” the article reads. 

They continued, “I can’t tell if Verizon’s avoidance of neighborhoods closer to LaGuardia is about the exclusion zone, or just the vagaries of early network buildouts. But we can confirm that while there’s no C-Band coverage within 2 miles of the airport, there is definitely coverage between 3-4 miles away.”

So just how fast is 5G? 

PCMag’s tests shows the in most cases, the C-Band service was double the speeds of LTE. This is because 5G was made more efficient and spread across multiple airwaves, making it able to provide more speed with less congestion on the networks. 

The article explained this more technically. “C-Band roughly doubles the airwaves Verizon had available for use in our tests. In most of our tests, Verizon used 40-50MHz of 4G LTE spectrum. When its “nationwide” 5G was active, it added 10MHz of low-band 5G to that. C-Band trades out that 10Hz of low-band 5G for 60MHz of mid-band, resulting in 100-110MHz being used.”

In comparison to tests run with T-Mobile, Verizon was just a little less. T-Mobile generally used 40MHz of 4G LTE along with 80MHz of mid-band 5G, for a total of 120MHz.

Tests were split between the carriers’ 4G and 5G components. PCMag found that in T-Mobile’s tests, 75% of the speed came from 5G, while in Verizon’s tests, 45-55% came from 5G. They also noticed that for some unknown reason, “each megahertz of Verizon’s was slower than a megahertz of T-Mobile’s—something the bigger carrier is surely working on optimizing.”

They also discovered something rather odd. “A bunch of our C-Band results in Kew Gardens all congregated around 140Mbps down in a way that makes me think it was a configuration issue or cap, not the capability of the network.”

What about the reach of the C-Band service?

The tests performed by the PCMag team have already shown T-Mobile is faster than Verizon on their mid-band spectrums – T-Mobile at its 2.5GHz frequency and Verizon at the higher C-Band spectrum.   The real question now is, which carrier delivers more range? PCMag says, “But the fact is, urban networks in places like New York, Chicago, and Dallas are dense enough that the difference may not matter.”

The case in Queens, for example, Verizon’s network is so dense that sites don’t have to broadcast very high to be received. It’s the same for T-Mobile here, whose extremely dense network in Queens has sites that are often a quarter-mile from each other or less.

From their findings, PCMag believes the jury is still out in the battle of mid-band distance. Though it is clear that C-Band has enough reach so that carriers won’t need to put a site every few blocks. 

Do I need C-Band now?While C-Band is available now, it can only get better as Verizon continues to roll out service. “In many other cities, it appears to already be better; my experience in Queens looks like the low end of the C-Band experience,” said the author of the article. They added, “The C-Band boost will come primarily to places within half a mile to a mile of a Verizon cell site, so look up your location on cellmapper.net if you’re curious. It’ll also require a recent phone.”