Table of Contents
Does 900MHz affect 2.4 GHz?
Yes, the receiver is spread-spectrum, but interference to such a receiver will generally raise its noise floor, which will reduce its range.
Does 2.4 GHz need line of sight?
Both frequencies need “line-of-sight” for proper and predictable operation. However some type of obstructions are more detrimental to a 2.4 GHz link. Trees with leaves that have dimensions near the wavelength of 2.4 GHz (but typically shorter than the wavelength of 900 MHz), will cause higher attenuation at 2.4 GHz.
How far can 915 MHz reach?
With equivalent transmitting power, a 915 MHz LoRa antenna’s signal can travel approximately 75 percent of the distance of a 433 MHz antenna. The penetration of buildings and windows is effective, especially when compared to higher frequencies like 2.4 GHz.
Which is better 433MHz or 915MHz?
The 433MHz radio better penetrate through walls, in theory; but since the standard 50mm antennas are pretty short for both bands, the antennas are 2 times less shorter for the 915MHz band and, in practice, they work better for the 915MHz, than for the 433MHz band.
What is the wavelength of 900 MHz?
33.3 cm
Frequency – Wavelength Chart
| Frequency | Wavelength | 1/4 Wavelength |
|---|---|---|
| 800 MHz | 37.5 cm | 9.38 cm |
| 900 MHz | 33.3 cm | 8.33 cm |
| 1.0 GHz | 30 cm | 7.5 cm |
| 1.2 GHz | 25 cm | 6.25 cm |
Is 900 MHz unlicensed?
The US Federal Communications Commission (FCC) has three primary frequency bands designated for unlicensed operation. Unlicensed means the operator of the radios does not need to file directly with the FCC to use the radio. The three frequency bands used for this in the U.S. are the 900 MHz, 2.4 GHz and 5.8 GHz.
What is the difference between WiFi network of 2.4 GHz and 5GHz?
2.4 GHz vs. 5 GHz: Which frequency should you choose? A 2.4 GHz connection travels farther at lower speeds, while 5 GHz frequencies provide faster speeds at shorter range. Your choice of 2.4 GHz or 5 GHz will depend on where and how you use your WiFi connection most.
Does 2.4 GHz go through trees?
Trees (mostly when they have leaves), as others have said, are horrible for wifi. 5Ghz doesn’t penetrate anything well, and 2.4Ghz and water don’t mix. If you can put something up on towers above the tree line that works too, but again, that isn’t cheap.
Is 900 Mhz a line of sight?
“Wireless Bridging System @ 900MHz for non line of sight links up to 18 miles. Capable of link speeds up to 150 megabits/second through dense foliage, heavy urban environments or any other line of sight obstructions that cause propagation issues with higher frequency 802.11A/B/G/N systems.
What is the difference between 900 MHz and 2 4 GHz radio?
On very long distance links several factors contribute to the radio link performance. Even though the free space loss at 900 MHz is lower than at 2.4 GHz, when you consider the typical antenna gains and antenna heights required to clear obstructions, a 2.4 GHz radio often has the advantage.
Is the antenna gain at 900 MHz higher than at 2 GHz?
But for a given physical size, the antenna gain at 2.4 GHz is significantly higher than an antenna at 900 MHz. A very common antenna used in these links is a semi-parabolic die-cast grid.
What is the difference between pacificpacific’s 900 MHz and dc24-hd antennas?
Pacific Wireless makes these antennas for both 900 MHz ( model GD9-DC15 ) and 2.4 GHz ( model DC24-HD ). In a point to point link where you use these antennas at both ends of the link, this difference counts twice.