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Infineon introduces smallest integrated receive Front-End Modules for GPS and GLONASS Applications

Tue, 08/09/2011 - 12:20am
ECN Europe

Infineon has introduced a new series of Receive Front-End Modules for implementation of Global Navigation Satellite System (GNSS) functionality in smartphones and other handheld devices. The new BGM103xN7 Series devices are the first modules available that support separate or simultaneous reception of both GPS and Globalnaya Navigatsionnaya Sputnikovaya Sistema (GLONASS) signals. Each of the three devices, optimised for different end platforms, offers low-power operation, exceptional protection against ESD and tiny package size (2.3 x 1.7 x 0.73 mm). 

Picture: Infineon

The BGM103xN7 modules combine the pre-filter and low noise amplifier (LNA) stages of the GNSS signal chain front-end to achieve a balance of performance improvements and space savings while reducing design time. The flexible solutions of Infineon meet key design goals, including high linearity to avoid interference of more powerful cellular signals, single-module coverage of the frequency range from 1575 to 1605 MHz, and optimised gain with very low noise for state-of-the-art sensitivity.

The three modules in the new BGM series, targeted for specific platform applications, are as follows. The BGM1033N7 is a standard solution meeting high-performance GPS/GLONASS specifications, with 14.8dB Gain and 1.65dB noise figure. The BGM1032N7 matches the BGM1033N7’s features with optimisation to suppress LTE Band13 signals (the upper frequency of the LTE 13 band is 787MHz, and the second harmonic of this frequency (i.e. 1574MHz) falls into the GPS band). Lastly, the BGM1034N7 features high-gain (17.0dB) version for systems with high losses in the receive chain, such as personal navigation devices and digital still cameras, where the potential for jamming due to high power cellular signals is less critical.

Common features of the series include low current consumption to meet mobile device requirements (4.0 mA / 3.1 mA), >43 dBc out-of-band rejection in cellular bands and +30 dBm input compression point in cellular bands. Each of the devices also offers an 8kV IEC ESD contact discharge specification at the RF input pin, which lets designers achieve ESD requirements with only one external component.

To meet diverse design requirements, the Infineon BGM103xN47 modules give engineers the flexibility to place any necessary post-filter (single-ended/balanced with suitable NF and attenuation) close to the GNSS receiver, while placing the pre-filter and LNA close to the antenna to achieve optimised sensitivity. Each of the modules feature a very low insertion loss / high out-of-band rejection pre-filter followed by a high performance GNSS LNA.

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