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A better connected society.
That's what we work for.

Our Mission

Our mission at RanLOS is to provide our customers with the most cost-efficient and easy-to-use test systems for vehicles, base stations, antennas, and other connected devices. We want to contribute to a better connected society and enable customers to lower their costs and shorten their product development process.

Built by expert knowledge and years of experience

RanLOS mission 2
The idea of an affordable and easy-to-use OTA measurement system using Random Line-of-Sight (RanLOS) technology came from Professor Per-Simon Kildal (1951-2016) at Chalmers University of Technology.

As a result RanLOS AB was founded in 2016 and has been granted several patents of the Random Line-of-Sight technology. The products have been realized by PhD Madeleine Schilliger Kildal and Professor Jan Carlsson among others.

Professor Per-Simon Kildal has commercialized a number of inventions, e.g., the Comhat antenna, which has been sold in over one million units and is deployed worldwide in Ericsson’s MINI-LINK. Professor Kildal also founded Bluetest AB which has a track record of delivering OTA test systems based on reverberation chambers to all major players in the telecom industry. Another Kildal founded spin-off company is Gapwaves AB, who provides gap-waveguide based mmWave antennas.
RanLOS mission

Milestones at RanLOS

Milestones at RanLOS


Toyo Corporation

Toyo Corporation is a Japanese technology company headquartered in Tokyo, Japan. Since its founding in 1953, TOYO has become the leading distributor of advanced measurement instruments and systems in Japan, China and USA.


Frankonia is recognized as a highly specialized technology corporation for EMC anechoic chambers and test system within the automotive and industrial sector for testing of electromagnetic compatibility.


Dymstec is recognized for its technological prowess and quality in the domestic mobile, automotive and RF markets through its differentiated EM shielding technology and excellent system integration capabilities based on its skilled EM technology.

Industries we help with our solutions

Connected car on road

Make sure connected products achieve better connectivity before they get launched on the market. The result is both safer and more sustainable products as well as time and money saved in the product development process.

Mast in nature 5G

Test and measure base stations or smaller handheld devices earlier in the product development process. Save cost and reduce time to market significantly by measuring more and earlier.

RanLos test lab
Test & Measurement

Upgrade your existing EMC chamber or test facility with a portable measurement system. By adding new test capabilities, such as antenna radiation pattern and throughput, you can target new customers and have a more flexible offering.

How does the Random Line-of-Sight (RanLOS) technology work?

When radio waves are sent to an antenna, they are spherical in the near field but becomes a plane wave in the far field. RanLOS has developed an innovative and portable solution to convert near field waves to far field waves at a distance of only a few meters. RanLOS products consists of an antenna array with a series of antennas that send signals to a reflector and when the waves bounce off the reflector, they are converted into plane waves.

An example from a real environment is when a base station sends a signal to a vehicle on a country road, then a plane wave directly hits the antenna of the vehicle at a random angle. To test this in a controlled test environment, direct plane signals are sent at different angles to the communication system of the vehicle. The entire process is controlled by RanLOS’ measurement software, which performs a measurement in five simple steps. The results are presented in easy graphical layout and can be exported to be used as input data for simulations for autonomous vehicles for example.

We know that measuring connectivity aren’t done regularly throughout the product development process today. A big reason for this is costs together with lack of time and test lab capacity. That’s where our solution comes in. You can set it up at your current location and measure as much as needed – everyday if you want to. With our products you can boost connectivity in a cost-efficient and flexible way. To start measuring more frequently during the whole product development process helps to make sure your connected devices are optimized and reliable, something that is vital in today’s connected society.

Madeleine Schilliger Kildal

PhD / System and Application Engineer at RanLOS

Why over-the-air (OTA) measurements are important today:

The last couple of years it has become more difficult to measure communication systems in, for example, vehicles. A communication system today usually consists of one or more antennas and a modem that contains a transmitter and receiver. In the past, it was possible to connect cables to each of these devices in order to measure its performance, but in modern communication systems, these parts are integrated and measurements must therefore be made at the system level.

We help to enhance connected devices with RanLOS over-the-air (OTA) test systems. With our solution you can send wireless signals with information between the communication system to be tested and the RanLOS system. The collected data is used to analyze the device under test with regards to performance and quality.

We aim to create a better connected society. To do so we need easy-to-use and flexible solutions for testing wireless performance over-the-air (OTA). It includes all relevant standards today and tomorrow; such as 3G, 4G, 5G, and WiFi. Work with us and start measuring easier, faster and smarter.