RMR051B Low Power 5.8 GHz Radar Sensor Module
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Product Information
Specifications
- Product Name: RMR051B Low Power 5.8 GHz Radar Sensor
Module - Frequency: 5.847 – 5.850 GHz
- Output Power (EIRP): -22 to 1 dBm
- Supply Voltage: 2.5 to 4.8 Vdc
- Current Consumption (Always on mode): 1.685 mA
- Current Consumption (Low power mode): 120 uA*
- Antenna Beam Width (Horizontal): 110 degrees
- Antenna Beam Width (Vertical): 80 degrees
- Operating Temperature: -20 to 85°C
- Storage Temperature: -40 to 85°C
- Detection Range: 0.1 to 10 meters
- Antenna Type: Patch antenna
- Antenna Gain: 3.0 dBi
- Polarization: Linear
Product Usage Instructions
1. Electrical Characteristics
Ensure that the supply voltage is within the specified range of
2.5 to 4.8 Vdc for proper operation. The current consumption varies
depending on the mode selected, with the always-on mode consuming
1.685 mA and the low power mode consuming 120 uA.
2. Pin Descriptions
The module has several pins for different functions:
- VIN (Pin 1): Power supply (DC 3.3V)
- OUT_RF (Pin 2): GPIO output from RF Transceiver
- MCU_MODE (Pin 3): MCU mode selection (High for Always on)
- OUT_MCU (Pin 4): GPIO output from MCU
- UART RX/SWCLK (Pin 5): UART data reception / Serial wire debug
(clock) - UART TX/SWDIO (Pin 6): UART transmission / Serial wire debug
(data) - GND (Pin 7): Ground
3. Mechanical Outlines
The module’s exterior dimensions are as follows:
- Module height: 20mm
- Module width: 22mm
- Module thickness: 3.8mm
- Interface pad gap: 2.0mm
- Interface pad width: 1.56mm
- PCB thickness: 1.4mm
FAQs
Q: What are the typical applications of the RMR051B Radar
Sensor Module?
A: The module can be used for motion detection, automated
lighting control, automatic door systems, screen wake-up, gesture
control, smart home applications, IoT applications, and intrusion
detection.
Q: What is the operating frequency of the radar sensor
module?
A: The operating frequency of the module is in the range of
5.847 to 5.850 GHz.
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RMR051B
Low Power 5.8 GHz Radar Sensor Module
Preliminary Product Specification
Key Features
Applications
5.8 GHz CW Radar sensor Motion detection 3.3 V supply voltage Very low operation current
(Always on mode: 1.685 mA)
(Low power mode: 107 120 uA) Size: 22 mm x 20 mm x 3.6 mm UART interface:
Output for radar signal processor GPIO interface:
Output for detection interrupt Illuminance sensor incorporated (5 60
lux, adjustable) Adjustable detection range (0.1 10 m) Ensuring detection reliability under all
weather conditions (fog, snow, rain,
dusk, night, temperature).
Motion detection Automated lighting control Automatic door systems Screen wake-up Gesture control Smart home IoT application Intrusion detection
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RMR051B Preliminary
Contents
1. Electrical Characteristics
4
2. Pin Descriptions
4
3. Mechanical Outlines
5
4. Block Diagram
6
5. Antenna Characteristics
6
6. Certification
7
7. Revision History
7
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List of Tables
Table 1. RMR051B Electrical Characteristics………………………………………………………………………………… 4 Table 2. Pin Descriptions ………………………………………………………………………………………………………………. 4 Table 3. Mechanical Outlines ……………………………………………………………………………………………………….. 5 Table 4. Antenna Characteristics ………………………………………………………………………………………………….. 6 Table 5. Revision History ………………………………………………………………………………………………………………. 7
List of Figures
Figure 1. RMR051B Exterior…………………………………………………………………………………………….. 5 Figure 2. Mechanical Outline…………………………………………………………………………………………… 5 Figure 3. Block Diagram ………………………………………………………………………………………………….. 6 Figure 4. Radiation pattern (Vertical/Horizontal) ……………………………………………………………….. 7
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1. Electrical Characteristics
Table 1.RMR051B Electrical Characteristics
Parameter
Min.
Typ.
Max.
Unit
Frequency
5.847
5.850
GHz
Output Power (EIRP)
-22
1
dBm
Supply Voltage
2.5
3.3
4.8
Vdc
Current Consumption (Always on mode)
1.685
mA
Current Consumption (Low power mode)
120*
uA
Antenna Beam Width (Horizontal)
110
deg
Antenna Beam Width (Vertical)
80
deg
Operating Temperature Storage Temperature
-20
85
-40
85
Detection Range
0.1
10
m
* The current consumption in low power mode can vary depending on the operating scenario.
Conditions @25 @25
Adult male
2. Pin Descriptions
Table 2. Pin Descriptions
Pin number
Pin name
1
VIN
2
OUT_RF
3
MCU_MODE
4
OUT_MCU
5
UART RX/SWCLK
6
UART TX/SWDIO
7
GND
Description Power supply (DC 3.3V) GPIO output (from RF Transceiver) MCU mode selection (High: Always on) GPIO output (from MCU) UART data reception / Serial wire debug (clock) UART transmission / Serial wire debug (data) Ground
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3. Mechanical Outlines
Figure 1. RMR051B Exterior
Figure 2. Mechanical Outline
Table 3. Mechanical Outlines
Symbol A B C D E F
Dimensions(mm) 20 22 3.8 2.0 1.56 1.4
Description Module height Module width Module thickness Interface pad gap Interface pad width PCB thickness
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4. Block Diagram
Figure 3. Block Diagram
5. Antenna Characteristics
Table 4. Antenna Characteristics
Item Antenna Type Frequency Antenna gain Polarization Connection Manufacturer
Description Patch antenna 5.847 – 5.850 GHz 3.0 dBi Linear Built-in (Probe feed) RANiX
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Figure 4. Radiation pattern (Vertical/Horizontal)
6. Certification
– KC (Korea Certification) is in progress.
7. Revision History
Table 5. Revision History
Data
Revision
2023.11.16
0.01
0.10
2023.12.18
0.11
0.12
Changes
Init Draft
Document Design Renewal. Change Font Size. Add Antenna Pattern.
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RMR051B Preliminary
FCC Information to User
FCC MODULAR APPROVAL INFORMATION EXAMPLES for Manual 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.
CAUTION: Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
NOTE: 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.
WARNING Changes or modifications not expressly approved by the manufacturer could void the user’s authority to operate the equipment.
“CAUTION : Exposure to Radio Frequency Radiation. Antenna shall be mounted in such a manner to minimize the potential for human contact during normal operation. The antenna should not be contacted during operation to avoid the possibility of exceeding the FCC radio frequency exposure limit.
FCC Radiation Exposure Statement: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.
OEM INTEGRATION INSTRUCTIONS: This device is intended only for OEM integrators under the following conditions:
The module must be installed in the host equipment such that 20 cm is maintained between the antenna and users, and the transmitter module may not be co-located with any other transmitter or antenna. The module shall be only used with the internal on-board antenna that has been originally tested and certified with this module. External antennas are not supported. As long as these 3 conditions above are met, further transmitter test will not be required.
However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed (for example, digital device emissions, PC peripheral requirements, etc.). The end-product may need Verification testing, Declaration of Conformity testing, a Permissive Class II Change or new Certification. Please involve a FCC certification specialist in order to determine what will be exactly applicable for the end-product.
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Validity of using the module certification: In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then the FCC authorization for this module in combination with the host equipment is no longer considered valid and the FCC ID of the module cannot be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization. In such cases, please involve a FCC certification specialist in order to determine if a Permissive Class II Change or new Certification is required.
Upgrade Firmware: The software provided for firmware upgrade will not be capable to affect any RF parameters as certified for the FCC for this module, in order to prevent compliance issues.
End product labeling: This transmitter module is authorized only for use in device where the antenna may be installed such that 20 cm may be maintained between the antenna and users. The final end product must be labeled in a visible area with the following: “Contains FCC ID: 2BMJL-RMR051B”.
Information that must be placed in the end user manual: The OEM integrator has to be aware not to provide information to the end user regarding how to install or remove this RF module in the user’s manual of the end product which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual.
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Requirement per KDB996369 D03
2.2 List of applicable FCC rules List the FCC rules that are applicable to the modular transmitter. These are the rules that specifically establish the bands of operation, the power, spurious emissions, and operating fundamental frequencies. DO NOT list compliance to unintentional-radiator rules (Part 15 Subpart B) since that is not a condition of a module grant that is extended to a host manufacturer. See also Section 2.10 below concerning the need to notify host manufacturers that further testing is required.3
Explanation: This module meets the requirements of FCC part 15C(15.249).
2.3 Summarize the specific operational use conditions Describe use conditions that are applicable to the modular transmitter, including for example any limits on antennas, etc. For example, if point-to-point antennas are used that require reduction in power or compensation for cable loss, then this information must be in the instructions. If the use condition limitations extend to professional users, then instructions must state that this information also extends to the host manufacturer’s instruction manual. In addition, certain information may also be needed, such as peak gain per frequency band and minimum gain, specifically for master devices in 5 GHz DFS bands.
Explanation: The EUT has a Patch Antenna, and the antenna use a permanently attached antenna which is not replaceable.
2.4 Limited module procedures If a modular transmitter is approved as a “limited module,” then the module manufacturer is responsible for approving the host environment that the limited module is used with. The manufacturer of a limited module must describe, both in the filing and in the installation instructions, the alternative means that the limited module manufacturer uses to verify that the host meets the necessary requirements to satisfy the module limiting conditions. A limited module manufacturer has the flexibility to define its alternative method to address the conditions that limit the initial approval, such as: shielding, minimum signaling amplitude, buffered modulation/data inputs, or power supply regulation. The alternative method could include that the limited module manufacturer reviews detailed test data or host designs prior to giving the host manufacturer approval. This limited module procedure is also applicable for RF exposure evaluation when it is necessary to demonstrate compliance in a specific host. The module manufacturer must state how control of the product into which the modular transmitter will be installed will be maintained such that full compliance of the product is always ensured. For additional hosts other than the specific host originally granted with a limited module, a Class II permissive change is required on the module grant to register the additional host as a specific host also approved with the module.
Explanation: The module is not a limited module.
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2.5 Trace antenna designs For a modular transmitter with trace antenna designs, see the guidance in Question 11 of KDB Publication 996369 D02 FAQ Modules for Micro-Strip Antennas and traces. The integration information shall include for the TCB review the integration instructions for the following aspects: layout of trace design, parts list (BOM), antenna, connectors, and isolation requirements. a) Information that includes permitted variances (e.g., trace boundary limits, thickness, length, width, shape(s), dielectric constant, and impedance as applicable for each type of antenna); b) Each design shall be considered a different type (e.g., antenna length in multiple(s) of frequency, the wavelength, and antenna shape (traces in phase) can affect antenna gain and must be considered); c) The parameters shall be provided in a manner permitting host manufacturers to design the printed circuit (PC) board layout; d) Appropriate parts by manufacturer and specifications; e) Test procedures for design verification; and f) Production test procedures for ensuring compliance. The module grantee shall provide a notice that any deviation(s) from the defined parameters of the antenna trace, as described by the instructions, require that the host product manufacturer must notify the module grantee that they wish to change the antenna trace design. In this case, a Class II permissive change application is required to be filed by the grantee, or the host manufacturer can take responsibility through the change in FCC ID (new application) procedure followed by a Class II permissive change application.
Explanation: Yes, The module with trace antenna designs, and This manual has been shown the layout of trace design, antenna, connectors, and isolation requirements.
2.6 RF exposure considerations It is essential for module grantees to clearly and explicitly state the RF exposure conditions that permit a host product manufacturer to use the module. Two types of instructions are required for RF exposure information: (1) to the host product manufacturer, to define the application conditions (mobile, portable xx cm from a person’s body); and (2) additional text needed for the host product manufacturer to provide to end users in their end-product manuals. If RF exposure statements and use conditions are not provided, then the host product manufacturer is required to take responsibility of the module through a change in FCC ID (new application).
Explanation: This module complies with FCC RF radiation exposure limits set forth for an uncontrolled environment, This equipment should be installed and operated with a minimum distance of 20 centimeters between the radiator and your body.” This module is designed to comply with the FCC statement, FCC ID is: 2BMJL-RMR051B.
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2.7 Antennas A list of antennas included in the application for certification must be provided in the instructions. For modular transmitters approved as limited modules, all applicable professional installer instructions must be included as part of the information to the host product manufacturer. The antenna list shall also identify the antenna types (monopole, PIFA, dipole, etc. (note that for example an “omni-directional antenna” is not considered to be a specific “antenna type”)). For situations where the host product manufacturer is responsible for an external connector, for example with an RF pin and antenna trace design, the integration instructions shall inform the installer that unique antenna connector must be used on the Part 15 authorized transmitters used in the host product. The module manufacturers shall provide a list of acceptable unique connectors.
Explanation: The EUT has a Patch Antenna, and the antenna use a permanently attached antenna which is unique.
2.8 Label and compliance information Grantees are responsible for the continued compliance of their modules to the FCC rules. This includes advising host product manufacturers that they need to provide a physical or e-label stating “Contains FCC ID” with their finished product. See Guidelines for Labeling and User Information for RF Devices KDB Publication 784748.
Explanation: The host system using this module, should have label in a visible area indicated the following texts: “Contains FCC ID: 2BMJL-RMR051B.
2.9 Information on test modes and additional testing requirements Additional guidance for testing host products is given in KDB Publication 996369 D04 Module Integration Guide. Test modes should take into consideration different operational conditions for a stand-alone modular transmitter in a host, as well as for multiple simultaneously transmitting modules or other transmitters in a host product. The grantee should provide information on how to configure test modes for host product evaluation for different operational conditions for a stand-alone modular transmitter in a host, versus with multiple, simultaneously transmitting modules or other transmitters in a host. Grantees can increase the utility of their modular transmitters by providing special means, modes, or instructions that simulates or characterizes a connection by enabling a transmitter. This can greatly simplify a host manufacturer’s determination that a module as installed in a host complies with FCC requirements.
Explanation: Top band can increase the utility of our modular transmitters by providing instructions that simulates or characterizes a connection by enabling a transmitter.
2.10 Additional testing, Part 15 Subpart B disclaimer The grantee should include a statement that the modular transmitter is only FCC authorized for the specific rule parts (i.e., FCC transmitter rules) listed on the grant, and that 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.
Explanation: The module without unintentional-radiator digital circuity, so the module does not require an evaluation by FCC Part 15 Subpart B. The host should be evaluated by the FCC Subpart B.
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Documents / Resources
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RANIX RMR051B Low Power 5.8 GHz Radar Sensor Module [pdf] Instruction Manual 2BMJL-RMR051B, 2BMJLRMR051B, RMR051B Low Power 5.8 GHz Radar Sensor Module, RMR051B, Low Power 5.8 GHz Radar Sensor Module, Power 5.8 GHz Radar Sensor Module, 5.8 GHz Radar Sensor Module, Radar Sensor Module, Sensor Module, Module |