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Microdiversity and Vegetation Influence on Forward Scattering at 60 GHz and 80 GHz

Radek Zavorka, Ondrej Zeleny, Jiri Blumenstein, Tomas Mikulasek, Rajeev Shukla, Josef Vychodil, Jaroslaw Wojtun, Niraj Narayan, Aniruddha Chandra, Jan M. Kelner, Cezary Ziolkowski, Ales Prokes

Abstract

Understanding the impact of vegetation and small-scale antenna movements on signal propagation is important for the design and optimization of high-frequency wireless communication systems. This paper presents an experimental study analyzing signal propagation at 60 GHz and 80 GHz in the presence of vegetation, with a focus on forward scattering and microdiversity effects. A controlled measurement campaign was conducted in an indoor environment, where the influence of a potted plant placed in the line-of-sight (LOS) path between the transmitter and receiver was investigated. The study examines the effects of antenna micro-shifts on the channel impulse response (CIR), highlighting variations in received power due to small positional changes of the antennas. The results indicate that the 80 GHz band exhibits higher sensitivity to micro-movements compared to the 60 GHz band, leading to greater fluctuations in received power.

Microdiversity and Vegetation Influence on Forward Scattering at 60 GHz and 80 GHz

Abstract

Understanding the impact of vegetation and small-scale antenna movements on signal propagation is important for the design and optimization of high-frequency wireless communication systems. This paper presents an experimental study analyzing signal propagation at 60 GHz and 80 GHz in the presence of vegetation, with a focus on forward scattering and microdiversity effects. A controlled measurement campaign was conducted in an indoor environment, where the influence of a potted plant placed in the line-of-sight (LOS) path between the transmitter and receiver was investigated. The study examines the effects of antenna micro-shifts on the channel impulse response (CIR), highlighting variations in received power due to small positional changes of the antennas. The results indicate that the 80 GHz band exhibits higher sensitivity to micro-movements compared to the 60 GHz band, leading to greater fluctuations in received power.
Paper Structure (8 sections, 4 equations, 8 figures, 3 tables)

This paper contains 8 sections, 4 equations, 8 figures, 3 tables.

Table of Contents

  1. Introduction
  2. Contribution of this paper
  3. Description of measured scenarios
  4. Measurement setup
  5. Characterization of propagation properties
  6. Free space path loss at 60 and 80 GHz
  7. Signal forward scattering analysis
  8. Conclusion

Figures (8)

  • Figure 1: Schematic diagram of the measurement campaign and TX and RX distances.
  • Figure 2: Photographs of the measurement scenario. (a) Detail of the 60 GHz and 80 GHz front ends enclosed in boxes, with horn antennas, all mounted on an XY tables. (b) The plant and the RX side of the setup.
  • Figure 3: Measurement system schematic access_radek
  • Figure 4: Simulated radiation pattern of horn antennas at 60 GHz and 80 GHz.
  • Figure 5: Measured PDP for RX position = 0, TX position = 0. (a) 60 GHz frequency band, (b) 80 GHz frequency band.
  • ...and 3 more figures