Bluetooth Low Energy BLE 4.
RADMEDIA-BLE-T21 BLE PCBA utilizes the Nordic nRF52810-QCAA SoC with a PCB trace antenna. RADMEDIA-BLE-T22 BLE PCBA utilizes the Nordic nRF52811-QCAA SoC with a PCB trace antenna. The nRF52811 BLE SoC is simply a slightly newer version of the nRF52810 BLE SoC and provides the exact same radio functionality. RADMEDIA-BLE-T21/RADMEDIA-BLE-T22 operates as a ‘Connectable-Beacon’ and transmits its beacon information at a fixed interval that can be adjusted from 1 to 2.2seconds and at a Tx power of 0dBm.
The (Family model RADMEDIA-BLE-T21/RADMEDIA-BLE-T22) two models of Main Board share the same PCB layout. The only difference is the RADMEDIA-BLE-T22 uses a slightly newer BLE SoC in the nRF52811-QCAA.
RADMEDIA-BLE-T21 PCBA Photos RADMEDIA-BLE-T22 PCBA Photos Page | 4 Revised: November 30, 2022
PCB Trace Antenna 1. Dimensions Figure 1. IFA Dimensions Table 1. IFA Dimensions H1 5.70 mm W2 0.46 mm H2 0.74 mm L1 25.58 mm H3 1.29 mm L2 16.40 mm H4 2.21 mm L3 2.18 mm H5 0.66 mm L4 4.80 mm H6 1.21 mm L5 1.00 mm H7 0.80 mm L6 1.00 mm H8 1.80 mm L7 3.20 mm H9 0.61 mm L8 0.45 mm W1 1.21 mm 2. Radiation Pattern Figure 2 shows how to relate all of the radiation patterns to the orientation of the antenna.
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3. PCB Antenna Bandwidth One way of measuring the bandwidth after the antenna is implemented on a PCB and connected to a transmitter is to write test software that steps a carrier across the frequency band of interest. By using the maximum hold function on a spectrum analyzer, the variation in output power across frequency can easily be measured. Figure 9 shows how the output power varies on the IFA when the PCB is horizontally oriented and the receiving antenna has horizontal polarization.
Federal Communication Commission Interference Statement This equipment was 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 instructio ns, may cause harmful interference to radio communications.
Requirement per KDB996369 D03 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.
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.
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 pcb trace antenna.
