About Aptab
With an up-to-date knowledge on the latest developments in the world of electronics, Aptab consults and supports others with challenging projects related to Electrical Engineering.
A strong commitment to delivering optimal performance and innovative solutions enables clients to efficiently achieve their goals!
Specializations
Aptab is mainly specialized in the following competencies:
- Telecommunications
- Radio-Frequency (RF) Engineering
- Antenna Design
- RF Tests & Measurements
- 2D/3D RF Simulations
- Electromagnetic Compatibility (EMC)
- High-Level Programming
Tests and measurements to characterize the RF performance and electromagnetic field propagation of antennas and devices can furthermore be performed.
Projects
Some of the latest projects are listed below
Broadband Antenna Array System Design
In cooperation with the Netherlands Institute for Radio Astronomy, Astron, a preliminary broadband antenna array system of inverted-v bow tie antennas was designed. Its potential to receive electromagnetic radiation from solar eruptions at a center frequency of 1.1 GHz with a bandwidth of 1.0 GHz was examined. The design and simulation were carried out using Altair FEKO.
Upgrade of Radiation Measurement System
A radiation measurement system (RMS) is designed and produced by MegiQ RF Tools and able to measure the two-dimensional radiation pattern of a device for a maximum of three cuts (XY, XZ and YZ). The existing system was upgraded by request of Philips Engineering Solutions in order to measure a three-dimensional radiation pattern that presents much more information. An implementation and upgrade of the RMS software was carried out in MATLAB, such that the complete measurement can be done in one run, after which the 3D radiation pattern is visualized. Post processing of the acquired data is furthermore easily achieved with the constructed MATLAB script.
Antenna Design and Optimization
At Aptab, Oscar Appelman is specialized in the design, simulation, production and characterization of antennas. Multiple antennas have been designed and produced to meet the specific needs of customers and many tests and measurements have been carried out to characterize antenna systems.
Indoor Wireless Link Performance Simulations
The behavior of wireless signals propagating in indoor environments is examined using Altair WinProp 3D ray tracing simulations. The results are validated with an extensive measurement campaign. Ray tracing simulations could potentially provide quick and reliable insights regarding, for example, the most efficient distribution of WiFi access points to guarantee a reliable wireless link across an entire building at all times. The article summarizing this research project can be found here.
Software Defined Radio as Mobile Base Station
A Base Transceiver Station (BTS) is developed by making use of a microcontroller and a Software Defined Radio. The BTS can be used in a shielded environment to control and manipulate devices making use of the 2G GSM network for measurement purposes.
Wireless Signal Propagation Measurements
In a world where wireless devices have become an integral part of daily life, the guarantee of reliable wireless networks is more crucial than ever. Accurately predicting the propagation characteristics of wireless signals is highly desirable. However, due to the complex nature of wireless signal propagation in volatile environments, simulating such scenarios is notoriously difficult and lacks accuracy. As a result, characterizing wireless signal propagation is often neglected and wireless networks are set up based on intuition and simple measurements.An extensive measurement campaign is carried out to examine the impact of environmental factors on wireless signal propagation. The article, published on Microwaves & RF, describes the findings of this measurement campaign and strives to offer insights into the requirements for an optimal implementation of wireless networks.R&D RF Measurement Systems
With Aptab, Oscar Appelman is involved in the Research & Development of RF measurement equipment and private wireless network systems. This currently concerns the optimization and implementation of existing measurement equipment and the development of new RF systems.
Contact
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