LF, HF, and UHF Frequency: What’s the Difference?

rfid frequency

Frequency is a measure of how many times something occurs in a given amount of time. For example, if you were to leave the house every day and drive to work at 8:00 am, then your frequency would be 1 (one trip per day). If you went twice on Monday, once on Tuesday and again on Wednesday, that would equal three trips for the week (3 days x 1 trip = 3 total trips), which would mean your frequency is 3. Frequency can be used when referring to almost any type of waveform—sound waves have frequencies too!

Low Frequency (LF)

Low frequency is defined as a frequency range that falls between 30 Hz and 300 Hz. The main advantage of this type of transmission is that it can be sent over large distances, even around the world, with minimal loss of quality. This makes it ideal for long-distance communication systems that require high quality sound such as cell phone networks.

Another benefit of LF radio waves is their ability to penetrate buildings or other objects better than high frequency signals do which makes them perfect for indoor coverage where there may be obstacles such as walls or other structures in between sending and receiving antennas.

One disadvantage associated with low-frequency transmissions is that they have less bandwidth when compared to higher frequencies like VHF (Very High Frequency) and UHF (Ultra High Frequency). This means less data can be transmitted at any given time using an LF system than using another type of system like VHF/UHF which has more available “space” on its spectrum.”

High Frequency (HF)

If you’ve been wondering about the differences between high frequency (HF) and ultra-high frequency (UHF), we’re here to help. As with any other communication system, both HF and UHF have their own advantages and disadvantages. Let’s take a look at the features of each:

  • Features of High Frequency
  • Features of Ultra High Frequency
  • Advantages of High Frequency
  • Shortcomings of Ultra High Frequency

UHF Frequency

Ultra-high frequency (UHF) is a band of radio frequencies from 300 MHz to 3 GHz, used for telecommunications. UHF frequency has been used in TV broadcasting since the mid 1940s, but is now being superseded by digital television (DTV) and other digital radio technologies. The term “ultra” refers to the higher frequencies of this range compared to the lower frequency bands.

The advantages and disadvantages of UHF Band


  • Higher data rates – UHF can transmit faster than other bands because it uses more bandwidth. This means that you can send more data at once, which is especially useful when sending video signals or audio files over longer distances because they take up more space in a signal transfer than text messages do on your phone’s SMS service; if all else were equal, sending an image file over text messaging would take much longer than doing so through Internet access over WiFi!

LF, HF, UHF Frequencies Each Have Advantages

Both LF and HF frequencies are on the lower end of the RFID electromagnetic spectrum, which indicates RFID tags in these frequencies will have relatively short read ranges but a greater ability to be received or transmitted in all directions.

Low frequency (LF) RFID tags typically use 13.56 MHz for communication, which is the same frequency used by many garage door openers. These tags have a read range of about 50 feet or less, depending on the environment. However, they can receive signals from all directions and are often used for asset tracking in warehouses and distribution centers that experience high levels of interference from other devices.

High frequency (HF) RFID tags use either 868 MHz or 915 MHz for communication, with a read range of up to several hundred feet under optimal conditions. These tags are typically more expensive than LF tags but provide much greater range and reliability because they do not require line-of-sight communication between tag and reader like LF technology does.

Difference Between Low Frequency, High Frequency, and Ultra High Frequency?

Low frequency (LF) radio waves occur from 30 kHz to 300 kHz.

High frequency (HF) waves are those between 3 and 30 MHz.

Ultra high frequency (UHF) refers to electromagnetic radiation with a frequency between 300 MHz and 3000 MHz, or 0.3 GHz – 3 GHz, in the electromagnetic spectrum.

Low-frequency tags offer fewer but long wavelengths that are ideal for use with metallic and liquid objects. The long wavelength makes it easy to penetrate metallic objects. On the downside, these tags will only offer a limited read range of up to 10 cm.

High-frequency tags, on the other hand, offer more but shorter wavelengths that are ideal for use with plastic and non-metallic objects. Their shorter wavelength makes it easy to penetrate plastic and non-metallic objects. On the downside, these tags will only offer a limited read range of up to 10cm.

The high-frequency tags have a relatively wider read range of up to 10 meter. As such, you should choose these tags when you need to track objects without necessarily getting too close to them. For example, if you want to use a portable reader to locate items in your store, then the HF tags would be ideal.


So, there you have it! The differences between LF, HF, and UHF frequencies. Hopefully this blog post has helped to clear up any confusion about these three types of radio waves.

Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors

More Posts

Send Us A Message


Your email address will not be published. 必填项已用*标注