13.4 Approved Antenna Types
The ATWILC3000-MR110UA is tested and approved to use with the antennas listed in following table. It is permissible to use a different antenna, provided the same antenna type, antenna gain (equal or less than), similar in-band and out-of-band characteristics (refer to specification sheet for cutoff frequencies).
If other antenna types are used, the OEM installer must authorize the antenna with the respective regulatory agencies and ensure its compliance.
| Sl. No. | Part Number | Manufacturer | Antenna Gain @ 2.4GHz Band | Antenna Type | ATWILC3000-MR110UA(1) | Cable Length/Remarks | |
|---|---|---|---|---|---|---|---|
| FCC(2)(3)/ ISED | CE | ||||||
| 1 | W3525B039 | Pulse Electronics Corporation | 2 dBi | PCB | X | X | 100 mm |
| 2 | RFDPA870920IMLB301 | WALSIN | 1.84 dBi | Dipole | X | X | 200 mm |
| 3 | RFA-02-P33 | Aristotle | 2 dBi | PCB | X | X | 150 mm |
| 4 | RN-SMA-S | Microchip | 0.56 dBi | Dipole | X | X | SMA to u.FL cable length of 100 mm (2)(3) |
| 5 | RFA-02-D3 | Aristotle | 2dBi | Dipole | X | X | 150 mm |
| 6 | RFA-02-G03 | Aristotle | 2dBi | Metal Stamp | X | X | 150 mm |
| 7 | RFA-02-L2H1 | Aristotle | 2 dBi | Dipole | X | X | 150 mm |
| 8 | RFA-02-P05 | Aristotle | 2 dBi | PCB | X | X | 150 mm |
| 9 | RFA-02-C2M2 | Aristotle | 2 dBi | Dipole | X | X | SMA to u.FL cable length of 100 mm (2)(3) |
| 10 | 86254 | Delock | 2 dBi | PCB | — | X | 50 mm |
- X = Covered under the certification.
- If the end product using the module is designed to have an antenna port that is accessible to the end user, then a unique (nonstandard) antenna connector (refer to FCC KDB 353028) must be used; for example, Reverse Polarity – SMA.
- If an RF coaxial cable is used between the module RF output and the enclosure, then a unique (nonstandard) antenna connector must be used in the enclosure wall for interfacing with the antenna.
- Contact the antenna vendor for detailed antenna specifications to review its suitability to the end-product operating environment and to identify alternatives.
Antenna Placement Recommendations for ATWILC3000-MR110UA
The following recommendations must be applied for the placement of the antenna and its cable:
- The antenna cable must not be routed over circuits generating electrical noise on the host board or alongside or underneath the module. It is preferable that the cable be routed straight out of the module.
- The antenna must not be placed in direct contact or in close proximity of the plastic casing/objects.
- Do not enclose the antenna within a metal shield.
- Keep any components that may radiate noise, signals or harmonics within the 2.4 GHz to 2.5 GHz frequency band away from the antenna and, if possible, shield those components. Any noise radiated from the host board in this frequency band degrades the sensitivity of the module.
- It is recommended that the antenna be placed at a distance greater than 5 cm away from the module. The following figure shows the antenna keepout area indication; where the antenna must not be placed in this area.
This recommendation is based on an open-air measurement and does not take into account any metal shielding of the customer end product. When a metal enclosure is used, the antenna can be located closer to the ATWILC3000-MR110UA module.
The drawing provides an option for routing the antenna cable, depending on the location of the antenna with respect to the ATWILC3000-MR110UA PCB. There are two possible options for the optimum routing of the cable.
