6.1.1 Transmitter and receiver virtual array
Transmitter and receiver antennas positions in
form a virtual array of 6 transmitter and receiver pairs.
This allows object detections finer azimuthal angular resolution (29°) and coarse elevation angular resolution
(58°). Receiver antennas are spaced at distance D (Lambda/2) and Transmitter antenna Tx1 and Tx2 spaced at
2D (lambda) in azimuthal plane and D (Lambda/2) in elevation plane. Tx1 and Tx2 are placed at D (lambda/2) in
the elevation and 2D (Lambda) in azimuth plane.
Figure 6-2. Virtual antenna array
shows the antenna radiation pattern with regard to azimuth and
radiation pattern with regard to elevation for TX1 and TX2. Both show the radiation pattern for TX1 and TX2 and
RX1, RX2 and RX3 together. All of the measurements were done with a Tx and Rx combination together. Thus,
for the -6dB beam width, you must see a -12db (Tx (-6dB) + Rx(-6dB)) number from the boresight.
Note
Wavelength (Lambda) is computed based on a frequency of 62GHz. Antenna placements are
according to this frequency.
Figure 6-3. Azimuth Antenna Radiation Patterns
Measured azimuthal radiation pattern for all Tx to Rx pairs (Corner reflector placed at ~5 meters with a 4- GHz
bandwidth chirp starting at 59GHz)
XWRL6432BOOST Antenna
10
IWRL6432BOOST/AWRL6432BOOST EVM: FR4-Based Low Power 60 GHz
mm-Wave Sensor EVM User Guide
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