Increase the range of your radio transmitters
IoT devices deployed in the field typically communicate either via wire or wirelessly.
In the field of wireless communications, there is a calculation that allows you to estimate the strength of the signal on a wireless receiver: the link budget.
In a wireless system connecting two devices, the link budget thus takes into account all sources of gain and loss that will have an impact on the power received by the receiving antenna. If you are designing a wireless IoT device and you know how to calculate this budget, you can reasonably estimate whether your signal will reach its destination and be read by the receiver.
To calculate the link budget, the designer must therefore identify all the sources of gain and loss in the system. Once the link budget is known, he will be able to determine if a modification is necessary in his RF signal chain.
These changes can include swapping material sets, redesigning a stack to reduce loss, adding amplifiers and filters, or modifying existing elements of the signal chain.
This article provides three tools that will help you assess your system's link budget and determine if your RF signal chain needs to be modified:
The link budget formula
A link budget calculator
The formula for calculating free space loss
These tools will allow you to calculate your link budget and determine if additional components are needed on your RF signal chain.
Knowing the link budget and comparing the received power to the receiver sensitivity also helps you determine if your signal chain needs to be changed.
Increase the range of your radio transmitters
IoT devices deployed in the field typically communicate either via wire or wirelessly.
In the field of wireless communications, there is a calculation that allows you to estimate the strength of the signal on a wireless receiver: the link budget.
In a wireless system connecting two devices, the link budget thus takes into account all sources of gain and loss that will have an impact on the power received by the receiving antenna. If you are designing a wireless IoT device and you know how to calculate this budget, you can reasonably estimate whether your signal will reach its destination and be read by the receiver.
To calculate the link budget, the designer must therefore identify all the sources of gain and loss in the system. Once the link budget is known, he will be able to determine if a modification is necessary in his RF signal chain.
These changes can include swapping material sets, redesigning a stack to reduce loss, adding amplifiers and filters, or modifying existing elements of the signal chain.
This article provides three tools that will help you assess your system's link budget and determine if your RF signal chain needs to be modified:
The link budget formula
A link budget calculator
The formula for calculating free space loss
These tools will allow you to calculate your link budget and determine if additional components are needed on your RF signal chain.
Knowing the link budget and comparing the received power to the receiver sensitivity also helps you determine if your signal chain needs to be changed.
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