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SPE-12-8-012/D/ZL Page 1 of 12 SPECIFICATION Part No. : FXP72.07.0053A Product Name : FXP72 Freedom 2.4GHz Series Ground Coupled Antenna Feature : 4dBi Gain IPEX MHFI Connector (U.FL compatible) 53 mm Cable 31 x 31 x 0.1 mm RoHS Compliant
SPE-12-8-012/D/ZL Page 2 of 12 1. Overview The FXP72 Freedom 2.4GHz Antenna works on WiFi, ZigBee, Bluetooth and ISM band at 2.4GHz. This antenna has been designed with a specific characteristic of having a ground coupling effect in between the antenna and the device’s board, suitable for those devices where there is no clearance in between the enclosure and the board, keeping the antenna performance. The Antenna can be placed above or below of the device’s board, but leaving the radiated elements of the antenna free of metal. This design can work on different thickness and plastic materials. We have selected a piece of ABS plastic with 1.5 mm of thickness for testing. Many module manufacturers specify peak gain limits for any antennas that are to be connected to that module. Those peak gain limits are based on free-space conditions. In practice, the peak gain of an antenna tested in free-space can degrade by at least 1 or 2dBi when put inside a device. So ideally you should go for a slightly higher peak gain antenna than mentioned on the module specification to compensate for this effect, giving you better performance. Upon testing of any of our antennas with your device and a selection of appropriate layout, integration technique, or cable, Taoglas can make sure any of our antennas’ peak gain will be below the peak gain limits. Taoglas can then issue a specification and/or report for the selected antenna in your device that will clearly show it complying with the peak gain limits, so you can be assured you are meeting regulatory requirements for that module. For example, a module manufacturer may state that the antenna must have less than 2dBi peak gain, but you don’t need to select an embedded antenna that has a peak gain of less than 2dBi in free-space. This will give you a less optimized solution. It is better to go for a slightly higher free-space peak gain of 3dBi or more if available. Once that antenna gets integrated into your device, performance will degrade below this
SPE-12-8-012/D/ZL Page 3 of 12 2dBi peak gain due to the effects of GND plane, surrounding components, and device housing. If you want to be absolutely sure, contact Taoglas and we will test. Choosing a Taoglas antenna with a higher peak gain than what is specified by the module manufacturer and enlisting our help will ensure you are getting the best performance possible without exceeding the peak gain limits. 2. Antenna Characteristics Parameter Multi-Standard Communication System Bluetooth WiFi ZigBee 2.4GHz ISM 2401-2480 2412-2462 2410-2480 2400-2483.5 Efficiency 70% Gain 5dBi Free Space Peak Gain -0.5dBi Return Loss -14dB Impedance 50 Ohms VSWR ≤2.0:1 Polarization Linear Power Handled 5 W Operation Temperature -40 ºC ~ +85 ºC Storage Temperature -40 ºC ~ +85 ºC Dimensions 31 X 31 X 0.08 mm Weight 1.2 g Connector MHFI (U.FL Compatible) Cable Standard Mini-Coax 1.13 mm Cable Length and color 53 mm, Black RoHS Compliant Yes Adhesive 3M 467
SPE-12-8-012/D/ZL Page 9 of 12 5. MECHANICAL DRAWING
Figure 13. Not recommend ground plane.
antenna was in between the ABS plastic and ground plane, having a clearance of 8 mm. The Antenna was tested into the Satimo system chamber and with a network analyzer. plastic of 1.5 mm of thickness. Figure 14. Ground plane test set up.