SkyBell Technologies SBHD10 2.4 GHz Wi-Fi Transceiver Module User Manual

HiTEM Engineering, Inc. 2.4 GHz Wi-Fi Transceiver Module Users Manual

Users Manual

1 2.4 GHz Wi-Fi Module User Manual Revision History Revision Date Reason Edited By A 11-04-2015 Preliminary release Seton Kasmir B 01-28-2016 Content amendments Edward Lin C 01-29-2016 Test method and antenna selection were added or modified Edward Lin D 02-02-2016 Correction on the antenna used at the test lab and add host PCB 50 ohm validation Edward Lin General Description The 2.4GHz WiFi module comes with USB2.0 interface and RF output, it supports IEEE 802.11b/g/n standards. This module operates in 2.4GHz ISM frequency band with low power consumption it applies a highly integrated MAC/BBP and RF single chip with up to 150Mbps data rate. The module is designed to be soldered to a PCB with three external interfaces, power, USB data and u.fl antenna. The module comes fully tested and calibrated at the factory. Features • 20MHz/40MHz bandwidth support. 1T1R mode • 802.11b: 1, 2, 5.5, 11Mbps; 802.11g: 6, 9, 12, 24, 36, 48, 54Mbps • 802.11n: Support PHY rate up to 150Mbps • Security support for WEP 64/128, WPA,WPA2, TKIP,AES Specifications Electrical Data
2 RF Performance Module Schematic Symbol Reference Use Schematic Pin Description
3 Footprint Bottom View Antenna Installation The module shall be mounted on a host PCB. A 50 ohm trace shall interface between pin 6 of the module and the antenna. In order to optimize the RF performance, a matching network may be needed along the 50 ohm trace. It is highly recommended that the distance between the RF port, pin 6 of the module, and the antenna port is less than 30mm to minimize the signal loss. The module can be interfaced with various types of single-ended antennas operating in 2.4GHz ISM band. The following antenna is recommended for operating with this module. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter except in accordance with FCC multi-transmitter product procedures. Antenna Manufactuer: AIR802 Model Number: ANRD245X02-RPSMA Electrical Specifications • Frequency 2400 - 2485 MHz • Gain 2 dBi at 2.4 GHz • VSWR < 1.5 at 2.4 GHz • Polarization Vertical • Vertical Beam Width 47° • Horizontal Beam Width 360° • Impedance 50Ω • Max. Input Power 5 watts • Weight 0.022 lbs (10 grams) • Length 4.27 inches (108.5 mm) • Connector Reverse Polarity SMA (RP-SMA) Plug (Male) • Finish Matte Black
4 50 ohm Trace & PCB Layout Example The following diagram shows the recommended PCB stack up configuration for the RF signal trace to have 50 ohms characteristic impedance. A microstrip structure is highly recommended on the host PCB to maintain RF signal integrity. In additional to the RF trace impedance on the PCB, matching network may be needed to properly interface with the antenna. The following diagram shows the matching network placement in one particular application. C12 = 0 Ω R6 = 0 Ω C11 = 10 pF R5 = 0 Ω EUT RF I/O PORT ANTENNA INTERFACE PORT Dielectric thickness, H1 = 12 mils Relative dielectric constant, Er1 = 4.2 Trace width, W1/2 = 22 mils Ground strip separation, D1 >22mils Copper thickness, T1 = 2.1 mils
5 Host PCB 50 ohm Impedance Validation The impedance of the microstrip RF trace must be measured on the host PCB between pad 26 of the Wi-Fi module and the center mounting oad of the u.FL connector (pad 1 of J6) shown in the previous diagram with the RF coupling capacitor, C11, installed. A vector network analyzer (Agilent N5230A) or a Polar Impedance Control Test System or equivalent test equipment shall be used to conduct this test. The impedance measured must be within +/- 10% of 50 ohm in order for the PCB to be acceptable for usage. The following picture is an example of the 50 ohm impedance test setup. Module Test Method The purpose of the test is to ensure the operation of the module once it has been installed on a host PCB. The following diagram shows the test setup. The WLAN test set is a LitePoint WLAN test set or equivalent equipment. Since the module has been installed on the host PCB, the connection between the test set and the module will be the antenna port on the host PCB. Using the test software the WLAN test set will conduct various tests to ensure the RF signal quality in both transmit and receive modes. This will also ensure the compliance of the FCC regulations.
6 FCC Certification 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. Labeling Instruction If using a permanently affixed label, the modular transmitter must be labeled with its own FCC identification number, and, if the FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: “Contains Transmitter Module FCC ID: 2ADXI-SBHD10” or “Contains FCC ID: 2ADXI-SBHD10” Any similar wording that expresses the same meaning may be used.

Navigation menu