ARIA SENSING LT102v2 UWB Radar Module User Manual

ARIA SENSING LT102v2 UWB Radar Module

FAQ

Frequently Asked Questions

• Q: What are the main applications of the LT102v2 UWB Radar Module?
  • A: The main applications include presence detection, position tracking, breath detection, and analysis in indoor environments.
• Q: How is the LT102v2 powered?
  • A: The module is USB powered when connected to a PC using a micro-B USB cable.
• Q: What communication interfaces does the LT102v2 support?
  • A: The module supports communication via USB full speed (virtual com port) and an auxiliary connector that can be used for GPIOs, SPI, and UART.

Summary

LT102v2 radar module is a turn-key Ultra-Wide Band radar system for indoor applications. LT102v2 integrates high-end directive UWB antennas, the signal processing unit, and the communication interfaces. It is designed to fit EU EN 302 065 (EU), FCC CFR 47 Part 15 (USA), RS220 03/2009 (Canada), UWB Regulations.

Overview

General Specifications

• Typ. Detection range: 12 meters
• Maximum power consumption: 220mA@5V
• Operating frequency: 6.5GHz to 8.5GHz
• Power supply: 5Vdc or USB 5Vdc
• Temperature range: -40°C to +85°C
• Integrated Antenna (aperture ±60° by ±60°)
• Communication interfaces: USB full speed, SPI, UART
• Dimensions: 36mm x 68mm

Applications:

• Presence detection
• Position tracking
• Breath detection and monitoring
• Gesture recognition

Features

• The LT102v2 is a high configurable UWB radar. This module combines a full UWB transceiver and an on board MCU.
• The module is targeted for application like presence detection, position tracking, breath detection and analysis.
• The communication is achieved by an USB full speed (virtual com port). The module has an auxiliary connector that may be used as GPIOs or additional communication interface such as SPI and UART. The module is USB powered.

Operating Principle

The operating principle of the system is based on the direct readout of the backscattered pulse

• The transmitter emits pulses (Fig. 1a) which travels into space and hits the targets that are into active area of the radar
• The targets reflect part of the incoming energy (echoes) backward to the radar module (Fig. 1b).
• The receiver converts the incoming signal to digital data, these data are provided to the MCU and processed according to the application.

Electrical specification

|

Min

|

Typ

|

Max

---|---|---|---
Operating frequency| 6.5GHz| 7.29GHz| 8.5GHz
Mean e.i.r.p. density| | | -41.3dBm/MHz
Peak e.i.r.p. density| | | 0dBm/50MHz
Temperature Range| -40°C| | +85°C
Supply voltage (AuxIO)| 3.7V| 5V| 5.5V
Supply voltage (USB)| | 5V|
Current consuption (AuxIO)| | | 200mA
Range resolution| | 6mm|
VIL| | | 0.3 Vdd
VIH| 0.7Vdd| |
Rseries (AuxIO protection)| | 220 Ohm|

Block Diagram

• The block diagram of the LT102v2 is reported next.

Module Connection

USB operation

• In a default configuration, the LT102v2 module can be attached to a PC through a A-plug, micro-B USB cable.
• In this configuration, the power supply of the LT102v2 is taken from the +Vcc pin of the USB cable.

Auxiliary IO connector

• The module provides an auxiliary connector (AuxIO) that may be used to control external electronics, or as alternate communication interface (SPI and/or UART).
• When both the USB plug and the AuxIO connector are connected the power supply is taken from USB connector.

Table 1: AuxIO Pinout description

Vdd during startup
15| SPI0_MOSI: SPI Interface #0, MOSI
16| SPI0_MISO: SPI Interface #0, MISO

Firmware

LT102v2 module is provided with a pre-programmed FW, this FW provides:

• Direct access to the data processing section: raw data or partially processed data
• Moving target detection algorithm
• Front-end control and parametrization

Firmware

LT102v2 module is provided with a pre-programmed FW, this FW provides:

• Direct access to the data processing section: raw data or partially processed data
• Moving target detection algorithm
• Front-end control and parametrization

The figure shows the basic structure of the FW. Currently only one application is provided, but the module can run multiple application according to the user needs (ex. Presence detection, breath analysis, etc.). See documentation for details about communication protocol and algorithms.

Antenna Performances

Antenna data are reported @ 7.5GHz. Maximum gain is 5.6dBi with HPBW = 71° x 84°

Communication Interface

• The FW provided implement a USB communication using a CDC Virtual comport device driver.
• See the “LT102 and LT103OEM COM Protocol” document for more details.

FCC STATEMENT

Regulatory Information USA

Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference
2. This device must accept any interference received, including interference that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

RF exposure safety

• It is designed not to exceed the emission limits for exposure to radio frequency (RF) energy set by the Federal Communications Commission.

Labelling Requirements for the Host Device

The host device shall be properly labelled to identify the modules within the host device. The certification label of the module shall be clearly visible at all times when installed in the host device, otherwise, the host device must be labelled to display the FCC ID of the module, preceded by the words “Contains transmitter module”, or the word “Contains”, or similar wording expressing the same meaning, as follows:

FCC ID: 2AXYT-LT102V2

• UWB devices may not be employed for the operation of toys. Operation on-board an aircraft, a ship or a satellite is prohibited.

Compliance of Host Devices

The module has been evaluated in portable stand-alone conditions. For different operational conditions from a stand-alone modular transmitter in a host (multiple, simultaneously transmitting modules or other transmitters in a host), additional testing may be required (collocation, retesting…).

The modular transmitter is only FCC authorized for the specific rule parts (i.e., FCC transmitter rules) listed on the grant, and the host product manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. If the grantee markets their product as being Part 15 Subpart B compliant (when it also contains unintentional radiator digital circuity), then the grantee shall provide a notice stating that the final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed. The end product with an embedded module may also need to pass the FCC Part 15 unintentional emission testing requirements and be properly authorized per FCC Part 15.

Data: 11/05/2024
Author: Technical Office
POC: info@ariasensing.com

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