M5. MMW measurement in frequency domain using ZVA67, QPW-50662330-C1, and Rotagrip (precision cross table) for antenna positioning (August 2014). The aim of this measurement was the same as in M3 but for MMW band (the spatial grid used for antenna positioning was set to 4 mm).
The aim of this measurement was the same as in the measurements of UWB in-vehicle channel using spatial grid in frequency domain performed on 22 May 2014 – to analyze the spatial stationarity of the intra-vehicle channel for MMW band 55–65 GHz. The measurement setup was identical as in the case of measurements of MMW in-vehicle channel in frequency domain performed on 28 Feb 2014. The receiving antenna was placed at a precision cross table where the spatial grid used for antenna positioning was set to 4 mm.
VNA specifications for MMW measurement:
- Start frequency 55 GHz
- Stop frequency 65 GHz
- Bandwidth 10 GHz
- Frequency step size 10 MHz
- Number of points 1001
- IF bandwidth 100 Hz
- Dynamic range ≈ 60 dB
- Output power 5 dBm
Equipment of measuring workplace:
- Vector Network Analyzer R&S ZVA67
- MMW broadband power amplifier QuinStar QPW-50662330-C1
- DC power supply Diametral P230R51D
- Phase-stable coaxial cables MEGAPHASE: TM67-V1V1-98, TM67-V1V1-138
- Open-ended waveguide antennas QuinStar QWS-V02000
- Waveguide components QuinStar: QWB-V90ER, QWB-V90HR, QWT-V90RR
- WR-15 to 1.85mm female adapters QuinStar QWA-15R18F00
- 1.85 mm female to 1.85 mm female adapters
- Precision cross table
- Vacuum glass holder
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