Classic frequency bands for mobile communication below 6GHz cannot meet throughput requirements projected for future needs due to network congestion and limited bandwidth.
However, the majority of demand could be met using millimeter-wave (mm-wave) spectrum – with potential for multi-Gbit/s
A key outcome of the World Radio Conference 2015 (WRC-15), according to Leti, was identification of a number of bands between 20 and 90GHz to be studied as 5G frequency candidates.
The lab has now made wideband channel measurements in the 59-65 and 80.5-86.5GHz frequency bands using mechanically-steered directional antennas at both transmit and receive ends, allowing double-directional angular characterisation.
For each band, researchers compared propagation characteristics such as the path loss and multi-path cluster properties in delay and angular domains.
“These millimeter-wave bands can be used to carry a significant share of the data load in 5G networks,” said Leti researcher Raffaele D’Errico, adding to Electronics Weekly: “A measurement campaign with directive antennas was carried out at two mmWave frequency bands. Based on measurement results the channel characteristics were analysed and modelled. In particular it was highlighted that path loss decay is very similar in the two bands. The most important multi-path components present comparable delay and angular characteristics, while a small number of paths are frequency dependent.”
Leti presented its findings at at the 11th European Conference on Antennas and Propagation (EuCAP) which week in the paper “A comparison of indoor channel properties in V and E Bands”.
Also at EuCAP, Leti demonstrated propagation modeling, miniature and integrated antenna development, and beam-forming antenna techniques.
Leti papers and posters at EuCAP:
- A 3-D wide-band set-up for over-the-air test in anechoic chamber
- A comparison of indoor channel properties in V and E bands
- Doppler characteristics for indoor mobile-to-mobile channels
- Multipath estimation technique for wideband mm-wave backscattering channels
- Dual-band dual-polarized transmit arrays at Ka-band
- Wideband circularly-polarized 3bit transmit array antenna in Ka-band
- Experimental characterisation of dual linearly polarised transmit array antennas at X-band
- Impact of phase compensation method on transmit array performance
- Analysis and design of a four-element super-directive compact dipole antenna array
- Analysis of super-directive Huygens source based end-fire arrays
- 3D printed compact dual-polarized wideband antenna
- V-band transceiver modules with integrated antennas and phased arrays for mmwave
- Switched-beam E-band transmit array antenna for point-to-point communications
- Substrate-integrated planar discrete lens antenna for compact mm-wave transceiver module
