AWRL6844EVM
Table of Contents
Introduction
The AWRL6844EVM antenna is designed to be operated in 57GHz - 61GHz frequency range. The use cases which can be addressed with this antenna are Child Presence Detection, Seat Belt Reminder, Intruder Detection and People Tracking.
| Design | Azimuth FOV (deg)* | Elevation FOV (deg)* | Azimuth Angular Resolution(deg) | Elevation Angular Resolution (deg) |
|---|---|---|---|---|
| AWRL6844(60GHz) | +/-70 | +/-65 | 29 | 29 |
A comparison table of all antenna configurations can be on the Antennas Overview page.
AWRL6844EVM Antenna Design
The peak gain of the AWRL6844EVM antennas is about 5-6 dBi across the operating frequency band of 60 GHz.
For more details about this EVM, please refer to the following link: AWRL6844EVM
AWRL6844 Stackup
Please refer to below PCB stackup details for the AWRL6844EVM antennas.
Material used for this PCB is high RF performance Rogers RO3003 RA PCB substrate for the antennas and transmission lines and 370HR is used for the rest of the layers. ED (electro-deposited) copper is not a suitable material for mmWave frequencies.
Detailed layout of this antenna with stackup are available for you to download and reuse at the following link: AWRL6844EVM
Measured Radiation Patterns
Measured radiation patterns of AWRL6844EVM Antenna for Azimuth and Elevation can be seen below.
In the above pictures, the X-axis represents the angle (in degrees) and Y-axis represents the normalized gain (in dB). This radiation pattern is measured inside an anechoic chamber with a corner reflector. The FMCW chirp used for this measurement has a start frequency of 57GHz and a RF bandwidth of 4GHz.
Measured Angle Error Estimations
Estimated angle error calculations for Azimuth and Elevation can be seen below. These are evaluated on TI’s EVM using measurements taken in an RF testing chamber with phase calibration and FFT based processing.
Estimated angle error on the Azimuth
Estimated angle error on the Elevation
In the above pictures, the X-axis represents angle (in degrees) and the Y-axis first shows teh estimated value and then shows teh estimated error in degrees.
Manufacturing Guidelines
The details on manufacturing this antenna can be found in the TI mmWave Radar Sensor RF PCB Design, Manufacturing and Validation Guide
Board Manufacturer
TTM Technologies - https://www.ttm.com/en
Material Details
Isola Group - https://www.isola-group.com/