Related Experiment Video
Updated: Dec 12, 2025
06:43
Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
Published on: May 2, 2018
7.3K
LoRa 2.4 GHz Communication Link and Range
Thomas Janssen1, Noori BniLam1, Michiel Aernouts1
1IDLab-Faculty of Applied Engineering, University of Antwerp-imec, Sint-Pietersvliet 7, 2000 Antwerp, Belgium.
Sensors (Basel, Switzerland)
|August 9, 2020
Summary
Semtech
Area of Science:
- Wireless communication technologies
- Radio frequency engineering
- Internet of Things (IoT) connectivity
Background:
- Semtech introduced a Long Range (LoRa) chipset for the 2.4 GHz band, complementing existing sub-GHz offerings.
- This new chipset enables region-independent hardware design and offers ultra-long range communication with interference resilience.
Purpose of the Study:
- To mathematically describe the physical layer of 2.4 GHz LoRa.
- To investigate the maximum communication range and data rates of 2.4 GHz LoRa in various environments.
- To compare 2.4 GHz LoRa performance against other 2.4 GHz technologies.
Main Methods:
- Mathematical modeling of the 2.4 GHz LoRa physical layer.
- Simulation of signal propagation using free space, indoor, and urban path loss models.
- Analysis of different spreading factors and bandwidths to determine range and data rates.
Main Results:
- Maximum communication ranges achieved: 333 km (free space), 107 m (indoor), and 867 m (urban).
- Maximum achievable data rate is 253.91 kbit/s; data rate at maximum range is 0.595 kbit/s.
- 2.4 GHz LoRa demonstrates superior communication range compared to other 2.4 GHz technologies due to configurable bandwidth and lower data rates.
Conclusions:
- 2.4 GHz LoRa offers significant communication range advantages, particularly in diverse environmental conditions.
- The technology provides enhanced bandwidth and localization accuracy for private LoRa networks compared to sub-GHz public networks.
- Hardware manufacturers can leverage region-independent chipsets for global deployment of LoRa-based applications.
Related Concept Videos
01:30Electronic Distance Measuring Instruments
340
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
340
01:30Propagation Speed of Electromagnetic Waves
4.5K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
4.5K
01:05Difference from Background: Limit of Detection
7.9K
The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...
The LOD indicates the presence or absence...
7.9K
01:21LC Circuits
3.0K
An LC circuit consists of an inductor and a capacitor, either in series or parallel. Consider a charged capacitor connected with an inductor in series. Before the switch is closed, all the energy of the circuit is stored in the electric field of the capacitor. When the switch is closed, the capacitor begins to discharge, producing a current in the circuit. The current, in turn, creates a magnetic field in the inductor. Because of the induced emf in the inductor, the current cannot change...
3.0K
01:10Interference: Path Lengths
1.7K
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
1.7K
01:06Echo
806
The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
806