Classic Bricks Play a New Role:
Wireless Telecom
The wireless telecommunications industry uses a cellular repeater (esentially a reception antenna, a signal amplifier and an internal rebroadcast antenna) to boost cell phone reception to the local area. Analogous to the cellular broadcast towers used by the network providers, they are much smaller, usually intended for use in one building. The systems usually use an external, directional antenna to collect the best cellular signal. The signal is then transmitted to an amplifier and then retransmitted locally, providing significantly improved signal strength. The more advanced models often also allow multiple cell phones to use the same repeater at the same time, so they are suitable for commercial as well as home use.
Our Vicor customer specializes in the development of high-quality active and passive indoor wireless products. With a complete line that includes bi-directional amplifiers, repeaters, in-line boosters, and system components, their products have been used to extend wireless coverage to virtually any indoor space. The subject application uses the PCS (Personal Communications Service) band, which is the 1900 MHz radio band used for digital mobile phone services in North America. CDMA (Code Division Multiple Access) and GSM (Global System for Mobile communications) systems can be used on PCS frequencies.
The design consists of two parts, the amplifier box and the control box. They use a
VI-200 brick (72 Vin to 12 Vout) in the amplifier box, and two VI-J00s (12 Vin to 5 Vout and
12 Vin to 28 Vout) in the control box.
Made in USA
