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ACFM-7103-BLK Datasheet(PDF) 6 Page - AVAGO TECHNOLOGIES LIMITED |
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ACFM-7103-BLK Datasheet(HTML) 6 Page - AVAGO TECHNOLOGIES LIMITED |
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6 / 20 page  6 Applications Information The ACFM-7103 quintplexer has two antenna connections, one common to the Cellular and PCS Band duplexers, and a separate antenna for the GPS filter. Dual Antenna Operation For applications in which a separate GPS antenna is preferred, the ACFM-7103 can be connected as shown in Figure 1. A series-L, shunt-C network is used to match the impedance of the Ant-1 port (duplexers) to the phone antenna. A nominal inductance value of 5.1 nH and ca- pacitance of 1.0 pF matches the Ant-1 port to 50 ohms. The GPS antenna (Ant-2) is internally matched to 50 ohms and needs no external components. Ant-1 Ant-2 Cell Tx PCS Rx Port 5 Port 1 Port 7 Port 3 Cell Rx Port 6 PCS Tx Port 2 GPS GPS Ant Port 4 Phone Ant 5.1 nH 1.0 pF Ant-1 Ant-2 Cell Tx PCS Rx Port 5 Port 1 Port 7 Port 3 Cell Rx Port 6 PCS Tx Port 2 GPS Port 4 Ant 5.1 nH Figure 1. Dual Antenna Application. Single Antenna Operation Optionally, if single antenna operation is required, the Ant-1 and Ant-2 ports of the ACFM-7103 can be connected together as in Figure 2. A single 5.1 nH inductor connected between Ant-1 and Ant-2 is all that is required to match both antenna ports to a common 50-ohm antenna. Figure 2. Single Antenna Application. Matching Components The L and C values shown here were selected to match the ACFM-7103 to 50 ohms. These values should be con- sidered to be nominal. Since every application is different, these nominal values should be adjusted to provide the best impedance match for the user’s particular circuit board, performance requirements, and interface to related components. The L and C matching components should be located in close proximity to the quintplexer as shown in the recom- mended PCB layouts. For both antenna configurations, the maximum variation for the matching components should be ±5% for the inductor and ±0.2 pF for the capacitor.The inductor should be of the high Q type (e.g., Murata LQW15AN5N1D00D). |
Similar Part No. - ACFM-7103-BLK |
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Similar Description - ACFM-7103-BLK |
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