IMST integrates Radiation Performance for LoRa Certification with Keysight

KAMP-LINTFORT, Germany–(BUSINESS WIRE)–#IMST–About one year ago, IMST was selected as an accredited LoRa™ Alliance
certification test house for LoRaWAN™ certification. “The Certification
testing against LoRaWAN V1.0.1 is a success story with more and more
end-devices becoming available that have been certified”, said Derek
Hunt, Chairman of the LoRa
Certification Committee. However the possibility of
connecting an end-device to an operator’s network successfully also
depends on the quality of the radio implementation of the end-device.

“Operators should impose minimum end-device radio performance criteria
to be able to ensure consistent service to all end-users. A way to
achieve this is to add radiation performance measurements to the product
test cycle”, says Markus Ridder, Head of the Test Department at IMST.

The test setup for the radiation performance was developed and tested in
close cooperation with Keysight

From a regulatory point of view the main requirement for 868 MHz ISM
devices is that the device’s ERP should not radiate in excess of +14 dBm
(or 25 mW) for any orientation. This sets the upper bound on the
end-device radiated power and also includes the duty cycle restrictions.
In general, with the measured effective TRP (Total Radiated Power) the
first quality characteristic of an end device can be derived.

“The operator needs to ensure that the end device actually radiates as
much power as possible to maximize the robustness and usable data rate
of the uplink”, says Mats Hansen from DIGIMONDO,
who operate the first public LoRaWAN network in Germany. “In addition a
measurement of the device’s receiver performance is required”, states
Hansen. This is derived from the fact that LoRaWAN networks are
symmetrical, bi-directional networks implying that the receiver
performance of the end-device is also important.

For this the TIS (Total Isotropic Sensitivity) is measured, allowing for
bi-directional performance characterisation of the end device.

Both measurements are performed in the accredited radio metrology
laboratory at IMST.
The software required on the end-devices is already installed on the end
device if it has already passed the LoRaWAN Certification, which can
also be performed in IMST

The report that IMST provides as the output from LoRaWAN Radiation
Performance measurement gives antenna diagrams showing the minimum and
maximum values for the TRP and TIS. Based on these figures, a network
operator can grade devices and ensure a good and smooth network
availability and performance. Within development these measurements
would help manufacturer to improve their designs.

Ruud Schellekens, CEO of 1M2M
said:”We like to base our development on facts. IMST’s LoRa measurement
reports give us just that!”

Are you interested in our certification services for your LoRa wireless

If so, contact us at

About IMST

IMST GmbH is a leading design house and development centre for wireless
modules, communication systems, chip design, antennas, EDA software and
regulatory certification which uses an in-house certified regulatory
test centre. IMST offers a standard product portfolio of radio modules
with hardware/software as well as complete system and product design
services. Individualised support during every phase of product
development including wireless technologies, from initial consulting to
series production, is one of the unique selling propositions of IMST.
For more information, visit

About Keysight Technologies

Keysight is an US company that manufactures test and measurement
equipment and software. In 2014, Keysight was spun off from Agilent
Technologies, bringing with it the product lines focused on electronics
and radio, leaving Agilent with the chemical and bio-analytical products.

About LoRa™ Alliance

The LoRa™ Alliance is an open, non-profit association has grown to over
370 members since its inception in March 2015, becoming one of the
largest and fastest growing alliances in the technology sector. Its
members are closely collaborating and sharing their experience to
promote the LoRaWAN™ protocol as the leading open global standard for
secure, carrier-grade IoT LPWA connectivity. With the technical
flexibility to address the multiple IoT applications, both static and
mobile, and a certification program to guarantee interoperability,
LoRaWAN™ has already being deployed by major mobile network operators
globally and is anticipated to widely expand in 2016.


Mr. Markus Ridder
+49 2842 981-384