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14.2BISM2 Module without antenna (special order)
The dimensions for this module are identical to the standard BISM2 illustrated above, but the antenna is replaced with a
TOP VIEW
The external antenna used must not result in an increased output power. I.e. the total gain of mating connector, cable and antenna must not exceed +2dB. If a higher gain antenna is connected, it will invalidate the RF and Bluetooth approvals for the module. The external antenna must provide a 50 Ohm impedance.
The antenna connector is a U.FL connector, supplied by Hirose. Mating connectors with cables are available from Hirose and their distributors, and also from other cable suppliers. The data sheet for the connector series is available at http://www.hirose.co.jp/cataloge_hp/e32119372.pdf
14.2.1External Antennae
A variety of manufacturers can supply external antennae suitable for use with the BISM2 module without antenna. Users should be aware that the choice of antenna may affect the qualification of the module.
To ensure that the qualification is not affected, the TOTAL GAIN of the external antenna, including insertion loss of the connectors and cable must be less than 2dBi. If a higher gain is employed, then the
Centurion (www.centurion.com) manufacture a snap- in external connector of the form generally known as a “rubber duck” with a 100mm captive lead terminated in a U.FL connector that is particularly appropriate for use with the BISM2 module.
The part number is WCR
NovaETS (www.novaets.com) in the UK supply a rubber duck antenna with U.FL connection.
The ordering information is
LAN Antenna (2.4GHz) Assembled with U.FL (iPX)
Connector.
