why is 1420 mhz forbidden?
534964
The idea of regulating the use of radio frequencies near 1420 MHz is that it is useful in radio astronomy, for monitoring the emissions of hydrogen, by far the most abundant substance in the universe.
1021124
ZigBee can operate at either 2.4 GHz or 915 MHz. ... That means that 2.4 GHz ZigBee devices are subject to more interference than 915 MHz Z-Wave and ZigBee devices. They also don't go through walls as readily.
703585
I advise you to not use the WNR614 as a wireless repeater / range extender. Netgear routers have very poor support for wireless repeating.
372005
The legacy 802.15. 4 standard usually operates in the unlicensed 2.4 GHz band using Direct Sequence Spread Spectrum (DSSS), which can accommodate data rates up to 250 Kbps. On the other hand, the 802.11ah utilizes the sub-1 GHz license-exempt bands to provide an extended range to Wi-Fi networks.
923664
The 2.4 GHz band provides coverage at a longer range but transmits data at slower speeds. ... Many WiFi-enabled technologies and other household devices use the 2.4 GHz band, including microwaves and garage door openers. When multiple devices attempt to use the same radio space, overcrowding occurs.
1357656
When carrier is shifted to bandpass, this one sided bandwidth becomes 9 MHz. This is nearly ten times as large as the total bandwidth occupied by all the channels of the AM radio. Use of SSB modulation would cut this in half but SSB is not used for video signals because of the complexity of the SSB receivers.
919717
So yes, 2GHz is sufficient. But mind you: The clock speed is not usually indicative of performance.
1029105
To communicate between your devices, Bluetooth sends signals over a 2.4GHz radio frequency. ... Wi-Fi is perhaps the biggest and most problematic example, as are other Bluetooth receivers and devices, which can interfere with one another. That said, even microwaves can cause Bluetooth interference with your devices.
1102224
Jamming Prohibited The use of a phone jammer, GPS blocker, or other signal jamming device designed to intentionally block, jam, or interfere with authorized radio communications is a violation of federal law. There are no exemptions for use within a business, classroom, residence, or vehicle.
838044
In short, mmWave spectrum allows for large bandwidth, which paves the way for potentially faster speeds. Sub-6 GHz spectrum, meanwhile, has limited bandwidth and therefore its speeds could potentially be slower than possible with mmWave spectrum.
1156298
Unfortunately it's not possible to convert VHF to UHF etc, as each type of radio contains hardware that enable it to operate on a specific frequency range. If you're buying or hiring more radios to work alongside ones you already use, they need to be of the same type.
1324852
The government of Brussels, Belgium blocked raising wireless radiation limits to ICNIRP levels effectively halting the 5G pilot program until after the election. The XII Municipality of Rome also called for Italy to refuse to increase allowable radiation levels and for the creation of zones without 5G radiation.
653251
156·525 MHz In the Maritime Mobile VHF service, the frequency 156∙525 MHz is to be used exclusively for digital selective calling for distress, safety and calling (see Resolution 323 (Mob-87). 156·65 MHz GMDSS ship-to-ship communications relating to the safety of navigation.
1344481
There isn't enough/real evidence suggesting that tethering is harmful to device hardware. AFAICT this is a feature-by-design that any android device (supporting tethering) should be able to handle without detrimental effects other hardware except perhaps that the battery may be degraded a little bit due to overheating.
1306684
The usual range of an FRS device on channels 8-14 is less than one-half mile, but longer range communications can be achieve on channels 1-7 and 15-22 depending on conditions. You may not interconnect FRS transmitters and radios with the telephone system.
479820
The radio technology of RC cars these days uses the 2.4 GHz frequency, which makes it possible to drive dozens of cars simultaneously without having to manually change the frequencies. After the transmitter and the car's receiver are bound, their functioning won't be interfered by other radio equipment.
1181659
Frame Length is fixed to be 10 ms. Scalable numerology should allow the subcarrier spacing from 15 Khz to 480 Khz. Number of subcarrier per PRB is 12. Number of OFDM symbols per slot may vary depending on subcarrier spacing.