The ubiquitous coaxial feeder cable provides the RF link on mobile base stations from Melbourne to Minneapolis. Bought by the metre, its 'buy and install' cost is negligible on the total base station price scale
Hittite Microwave Corporation has a high IP3 dual downconverter RFIC which is designed for use in virtually all wireless infrastructure applications in the 1700-2200 MHz band, including those based on CDMA, WCDMA, GSM, GPRS and EDGE standards.
Metallised polypropylene film capacitors are at no risks from leakage. The cases are metallic, the covers are in self-extinguishing plastic (Class V2 to UL-94 standards) and an edging of the case on the cover seals the capacitor, ensuring airtight closure.
Trilithic Inc has introduced the Model PA-5127-1 solid-state programmable attenuator which operates from 400 to 2000 MHz. The attenuation range is 0-127 dB in 1 dB steps. The switching speed is 2 µs. The operating supply voltage is 5 V and is controlled with TTL.