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Dual-mode antenna module for embedded radio applications

Antenova has announced the addition of the M10385 dual-mode receive/transmit internal surface mount FM antenna module for a broad range of mobile and digital media device applications. The antenna module design provides a drop-in solution to address the growing market for FM radio functionality in mobile and media devices, such as mobile phones, personal navigation devices, PMP (personal media players), media tables and digital photo frames, without the need for external headphone or retractable antennas. In mobile phone applications, the device eliminates the need for traditional headphone cable antennas and is suitable for use with Bluetooth headsets. In addition, the device has transmit capability, which enables any device fitted with the FM antenna module to become a personal FM transmitter. For example, users could transmit music from their mobile phone, PMP or MP3 player to their car radio, thereby achieving a no-cost in-car audio integration option for listening to music on the car’s stereo sound system. The same can be applied to the home stereo system with FM radio as well.

The device is an active FM antenna module consisting of FM antenna with a matching circuit and low noise amplifier (LNA) in a 30x5x1.5mm3 package, with the convenience of a standard surface mount device. The device is capable of receiving/transmitting FM frequencies from 87.5 to 108MHz and is intended to be planar mounted at the edge of the host PCB for minimum space requirement. A minimum clearance of 2mm between the antenna and the host PCB ground plane is recommended for the best FM signal reception. The module can be easily interfaced to any FM receiver as the LNA output is matched to 50Ω, but custom impedance can also be provided.