Rx/Tx converters improve reliability of mobile infrastructure

Integrated Rx/Tx converters are claimed to significantly improve the reliability, cost, and time to market for microwave and millimeter wave mobile operators and telecomms equipment manufacturers.

The HMC8100 and HMC8200 Rx/Tx converters incorporate an array of functions, replacing multiple discrete parts for microwave backhaul applications. Reducing the number of components simplifies the design, and can speed time-to market. The reduction in board size and associated power consumption further improves reliability, says Analog Devices, and reduces both system cost and operating expenses. The resulting telecomms equipment is more dependable in the field, and enables mobile operators to provide a high-quality mobile phone service experience for the end customer

The HMC8100 IF receiver chip (pictured) converts RF input signals ranging from 800 to 4,000MHz down to a single-ended IF signal of 140MHz at its output. The device includes two voltage gain amplifiers, three power detectors, a programmable automatic gain control block, and select integrated bandpass filters with 14, 28, 56, and 112MHz bandwidth. The chip supports all standard microwave frequency bands from 6.0 to 42GHz.

 The HMC8200 IF transmitter chip converts the industry standard 300 to 400MHz IF input signal to an 800 to 4,000MHz single-ended RF signal at its output. IF input power ranges from -31 to +4.0dBm, to provide 35dB of digital gain control in 1.0dB steps, while an analogue voltage gain amplifier continuously controls the transmitter output power from -20 to +5.0dBm. The device also features three integrated power detectors.



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