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Wireless communication via microwaves at the Long Night of Research

Telecommunications / News / Wireless communication via microwaves at the Long Night of Research
24. May 2024
The Long Night of Research took place on May 24, 2024 from 5 p.m. to 11 p.m. throughout Austria. In all federal states you could discover, ask questions and take part.
Open Image Gallery
Info-Stand in the Aula with Gudrun and Bernhard
Open Image Gallery
hands-on transceiver station with Tom

The program will remain https://langenachtderforschung.at until 31 August 2024 to allow you to browse the programme in retrospect.

In Vienna’s fourth district, TU Wien offered a varied program on computer science, electrical engineering, and information technology at the Gußhaus campus.
The Institute of Telecommunications and the Radio-Amateur-Klub of the TU Vienna (callsign OE1XTU) invited to a hands-on transceiver station: Wireless communication via microwaves on the 23cm band. A simple all-mode portable station for the 23cm band was set-up in April 2024 by Johannes Pichler (OE3JPC) and Chris (OE1VMC) with around 1-2 W transmission power and an HB9CV PCB antenna. The portable station is based on a YAESU FT-817ND radio with a transverter from SG-Labs, see
https://www.sg-lab.com/TR1300/tr1300.html

The set goal was to demonstrate a bidirectional link between OE1XTU at Campus Gußhaus and OE3JPC in Weigelsdorf over a distance of 29 km. However, due to the dense urban propagation environment in Vienna and the unfavorable terrain, the set goal could not be achieved on the ground floor of the Gußhaus campus. On the third floor of the historic electrical engineering institute, however, direct wireless conversations on 1296.960 MHz in SSB were possible without any problems through the windows facing south, as was tested shortly before the start of the long night

At around 4 p.m., a heavy thunderstorm with downpours came up and threatened to put a spanner in the works. However, the storm was short-lived and from around 6 p.m. the 23cm band connection was stable for demonstration. Around 50 visitors of all ages visited the station, which was operated alternately by Thomas Pohl (OE3PTC), Gudrun Schuchmann (OE1OMA), and Bernhard Spangl (OE1BES). Johannes OE3JPC was available as a remote station for the entire time.

Parallel to the hands-on station, there was also an information stand on research topics in the field of flexible radio systems and antennas: 5G to increase traffic safety at road junctions, a fractal dipole antenna on a microchip and a prototype for a reconfigurable intelligent surface for deflecting millimeter waves in a desired direction as if it were a pocket mirror. For the youngest among those interested, there was enameled copper wire so that they could bend the fractal dipole antenna themselves as a work of wire art and take it home as a souvenir.

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