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Doodle Labs NM-DB-2 Industrial Wi-Fi Transceiver

Product Family Overview

Doodle Labs' portfolio of Industrial Wi-Fi transceivers offer the industry's best-in-class performance. These transceivers have high transmit power to achieve long range and offer the rugged construction to withstand operation in the extended temperature range. In addition, our transceivers feature high interference immunity that allows successful operation in today's congested Wi-Fi environments. The transceivers are FCC, CE, and IC certified and have been deployed in numerous demanding applications.

Target Applications

The Doodle Labs Industrial Wi-Fi transceivers meet the demanding needs of customers across a broad range of industries. Examples include:

  • Unmanned Vehicles - Drones
  • Unmanned Robots
  • Industrial IoT applications
  • Rugged/Military requirements with extended temperature and vibration resiliency
  • Mesh Networking deployments
  • Passenger Wi-Fi access aboard airplanes and trains
  • Streaming HD Video Surveillance Cameras
  • Wireless Infrastructure in harsh operating conditions of the Oil/Gas fields and Mines


Best-in-class features include:

  • Modular FCC, CE and IC certifications to expedite system integration
  • Integrated LNA for best-in-class Rx sensitivity to pick up low energy signals from mobile phones
  • Up to 30 dBm of RF power to get the largest possible area coverage
  • Extended temperature range from -40C to +85C.
  • Electrical Stress protection on Antenna ports for outdoor operation
  • Long product life cycle to meet the needs of Industrial IoT applications
  • High interference immunity for Wi-Fi congested environment
  • Hardware "RF Kill" feature to meet the FAA requirement for airborne applications
  • High band isolation to support concurrent dual band operation for multi-band routers
Interference immunity performance compared to leading competitors

NM-DB-2 Specifications

Technical Specifications
Model Number NM-DB-2 (Rugged/Military Applications)
Ordering Code NM-DB-2M with MMCX connectors
NM-DB-2U with U.FL connectors
Radio Configuration 2x2 MIMO, Dual Band
Special Features
  • Extended lifespan with planned availability for long time
  • Extreme Reliability, IPC Class 2 standard with Class 3 options
  • Compliant to MIL-STD-202G, Qualified for high shock/vibration environments
  • MAC Chipset Qualcomm Atheros: QCA9590-BR4B with Extended Temperature range
    Software Support Open Source Linux Drivers
    ath9k for 11n models
    OpenWRT (Wireless Router/Linux OS)
    Center Frequency Range 5.180 GHz ~ 5.825 GHz
    2.412 GHz ~ 2.484 GHz
    This varies by the regulatory domain
    Channel Bandwidth* 20, 40 MHz channels
    Radio Modulation/Data Rates (Dynamic Link Adaptation) 802.11a: 6, 9, 12, 18, 24, 36, 48 and 54 Mbps (5.x GHz)
    802.11n: MCS0-15 (5.x and 2.4 GHz)
    802.11b/g: 1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48 and 54 Mbps (2.4 GHz)
    802.11n version 2.0 Capabilities
  • 802.11 dynamic frequency selection (DFS) as an AP and Client
  • Packet aggregation: A-MPDU (Tx/Rx), A-MSDU (Tx/Rx), Maximal ratio combining (MRC), Cyclic shift diversity (CSD), Frame aggregation, block ACK, 802.11e compatible bursting, Spatial multiplexing, cyclic-delay diversity (CDD), low-density parity check (LDPC), Space Time Block Code (STBC)
  • Phy data rates up to 450 Mbps (40 MHz channel)
  • Operating Modes AP, Client, and Adhoc modes for Access Point, PtP, PtmP, and Mesh networks
    MAC Protocol TDD with Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA)
    Wireless Error Correction FEC, ARQ
    Wireless Data Security 128 bit AES, WEP, TKIP and WAPI hardware encryption. Support for IEEE 802.11d, e, h, i, k, r, v, w and time stamp standards
    FIPS Certification
  • Small packet size (96 bytes) in AES encryption at full packet rate.
  • FIPS 140-2, Level 2 (Temper Evidence Shield), Loop back mode to facilitate FIPS AES certification.
  • Tx and Rx performance at 5 GHz

    TX/RX Specification Xtreme Coding Rate Tx Power(±2dBm)2 Rx Sensitivity (Typ)
    5 GHz (20 MHz Channel) - 11n models
    802.11a, STBCBPSK1/225-94
    802.11a64 QAM3/420-77
    802.11n16 QAM3/423-82
    802.11n64 QAM5/620-75
    5 GHz (40 MHz Channel) - 11n models
    802.11n16 QAM3/423-79
    802.11n64 QAM5/620-72

    Tx and Rx performance at 2.4 GHz

    TX/RX Specification Xtreme Coding Rate Tx Power(±2dBm)2 Rx Sensitivity (Typ)
    2.4 GHz (20 MHz Channel) - 11n models
    802.11b1 MbpsCCK27-100
    802.11g64 QAM3/422-79
    802.11n16 QAM3/425-81
    802.11n64 QAM5/622-74
    2.4 GHz (40 MHz Channel) - 11n models
    802.11n16 QAM3/425-78
    802.11n64 QAM5/622-71

    Additional RF performance information

    Additional RF Specifications
    Antenna Signal Strength -35 to -85 dBm (Recommended), Absolute Maximum=+12 dBm
    Interference ImmunitySAW filters on RF ports for immunity against high power cellular transmissions in the neighboring 2.4 GHz bands.
    Antenna port isolation for concurrent operationUp to +10 dBm signal strength for 5 GHz signal without degrading 2.4 GHz operation

    Up to +5 dBm signal strength for 2.4 GHz signal without degrading 5.x GHz operation
    Integrated Antenna Port Protection10 kV
    Receiver LNA Gain>10 dB
    Receiver Adjacent Channel Rejection (ACR)>18 dB @ 11a, 6 Mbps (Typ)
    Receiver Alternate Channel Rejection (ALCR)>35 dB @ 11a, 6 Mbps (Typ)
    Receive chain Noise Figure+6 dB
    Transmitter Adjacent Channel Leakage Power Ratio (ACLR)45 dB (Fc ± ChBW)
    Transmitter Spurious Emission Suppression-40 dBc
    RF Power controlIn 0.5 dBm steps. Accuracy of power calibration loop ±2 dBm. Each transceiver individually calibrated and tested.
    RF Hardware Disable (RF Kill)Pin 20 of miniPCI-E interface. (Required for FAA compliance)
    Spectral Analysis8 bit resolution spectral FFTs available for software analysis

    Physical, Environment, and Other Specifications

    Physical, Environment, and Other Specifications
    Host InterfaceminiPCI-Express 1.2 Standard
    Host CPU BoardAny CPU board with miniPCIe interface
    Operating Voltage3.3 Volts from miniPCI-Express connector
    Power Consumption4W @ Max power, in continuous data transfer mode on all chains
    2W @ 20 dBm power (ETSI max), in continuous data transfer mode on all chains
    0.7W in continuous data receive mode
    250 mW in Sleep mode
    Shield case temperature range (Operating)-40°C to +85°C
    Humidity (Operating)0% - 95% (Non-condensing)
    Dimensions30 x 50 x 4.75 mm, 12 grams. High Res Photos - Mechanical drawings and 3D-CAD files available upon request
    MTBF29 years
    Regulatory RequirementsDesigned and verified to meet various regulatory requirements. Formal testing and approval is required based on the Integrator's particular host platform and antenna type. The Integrator is also responsible for obtaining all required regulatory approvals in target markets for the finished product.
    FCC ID2AG87NM-DB-3-R2. DFS compliance in both Master and Client modes.
    CE/ETSIConforms with all the requirements of the European Directive 2014/53/EU – EN 62311:2008, EN 62368-1:2014+A11:2017, Draft EN 301 489-17 V3.2.2 (2019-12), EN 301 489-3 V2.1.1 (2019-03), EN 301 489-1 V2.2.3 (2019-11), EN 300 328 V2.2.2 (2019-07), EN 301 893 V2.1.1 (2017-05), EN 300 440 V2.2.1 (2018-07)
    Industry Canada (IC)21411-NMDB3R2
    Japan (MIC)R210-130916
    RoHS/WEEE ComplianceYes. 100% Recyclable/Biodegradable packaging
    ECCN Code 5A992
    HS Code 85256010

    System Integration


    System Integration Block Diagram

    As shown in the block diagram, the modular nature of the MIMO radio transceivers allow for accelerated development of the wireless modem. Any embedded Single Board Computer with standard miniPCI-Express interface is required. The Linux distribution OpenWRT has evolved over time and provides advanced features in a wireless router. It is a stable distribution and many OEMs are using OpenWRT as a starting point and customize further for their application. The distribution includes the ath9k driver to interface with the MIMO transceivers. Both OpenWRT and open source drivers (ath9k and ath10k) have extensive online documentation available. User group forums also provide responsive technical support.

    Portfolio Index

    Doodle Labs' Industrial Wi-Fi transceiver portfolio provides configurations optimized for a vast variety of project needs. All models are form-factor compatible. For information on other models, please visit -

    FCC Statement

    Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

    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

    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, and (2) this device must accept any interference received, including interference that may cause undesired operation

    CE Statement

    This is a Class A product. In a domestic environment, this product may cause radio interference, in which case the user may be required to take adequate measures.

    CAUTION: To comply with the Europe CE requirement, this device must be installed with CE certified computer equipment which meet with Class A limits. Be aware that outdoor installations require special attention and will only be handled by trained and qualified installation personnel.

    All cables used to connect this device must be shielded and grounded. Operation with non-certified computers or incorrect cables may result in interference to other devices or undesired effects to the product. Particular attention has to be given allowed operational frequencies.

    IC Statement

    This device complies with Industry Canada's licence-exempt RSSs. Operation is subject to the following two conditions:

    1. This device may not cause interference; and
    2. This device must accept any interference, including interference that may cause undesired operation of the device.

    The term "IC: " before the certification/registration number only signifies that the Industry Canada technical specifications were met. This product meets the applicable Industry Canada technical specifications.

    Le présent appareil est conforme aux CNR d'Industrie Canada applicable aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement