To ensure a wide coverage area without service disruption, today’s multi-band handsets are designed for use at multiple frequency ranges. In the past, mobile phones have required a low pass filter for each frequency band to prevent disruption occurring due to busy frequency bands. With the introduction of Taiyo Yuden’s FI168D087018-TFI168D087018-T two differing frequency band low pass filters (the GSM telecommunication standard low band and a high band) are combined into a single part. This reduction in parts and surface mount area contribute to a smaller overall device size.
The EIA 0603 size dual low pass filter measures just 1.6mm x 0.8mm with a maximum height of 0.45mm. Sample price is $0.50/unit.
To meet the growing demand for multiple frequency band support, a multi-antenna method is often utilized. Two antennas for different frequency bands are used for sending and receiving RF signals, with a diplexer that performs the required multiplexing and de-multiplexing operations. This often results in a higher component count and increased mounting space requirements.
To provide an alternative solution Taiyo Yuden’s has introduced two new EIA 0805 size multilayer diplexers developed for use with mobile handsets. The new FI212P089208-TFI212P089208-T and FI212P089213 (2.0 x 1.25 x 0.90mm each) multilayer diplexers are optimized for the RF send/receive systems of multi-band mobile phones. Each device carries a $0.50 ea/sample price.