Digital Microwave Radio System: Analysis, Configuration, and Solutions

This report delves into the analysis of a digital microwave radio system operating in the 18GHz radio frequency band, with a focus on its configuration and performance. The assignment includes a calculation of the nominal Receive Signal Level (RSL) at the receiver input under free space conditions. Furthermore, the report explores the purpose and functionality of passive repeaters within the microwave transmission system, highlighting their role in signal redirection, cost reduction, and environmental benefits. The report references relevant literature to support the analysis and provides a comprehensive overview of the system's components and their interactions. The report is a valuable resource for students studying electrical engineering, providing insights into microwave communication systems.

Running head: DIGITAL MICROWAVE RADIO SYSTEM 1
Digital Microwave Radio System
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DIGITAL MICROWAVE RADIO SYSTEM 2
Q1: The digital microwave radio system shown in Fig 1 below operates in the 18GHz radio
frequency band and provides 2x2 Mbps transmission capacity between two sites. The system
deploys a passive repeater.
Figure 1: Microwave Link Configuration
1. Calculate the nominal Receive Signal Level (RSL) at the input of the receiver in dBm
assuming free space conditions
Solution

DIGITAL MICROWAVE RADIO SYSTEM 3

DIGITAL MICROWAVE RADIO SYSTEM 4

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Q2: Purpose of passive repeaters in the microwave transmission
For wireless communication, the combination of an amplifier, two antennas, radio
receiver, isolator, and transmitter forms the repeater. There is an offset frequency in the signal
generated by the transmitters, and the one received, and this frequency should be managed from
disabling the receiver (Cameron et al., 2015). The isolator can offer protection, but it is not
sufficient, hence, in this system, the passive repeaters will essentially act as beam blenders,
which implies that they redirect the signal which is under some construction. In this manner, they
assist in some ways, for instance; reduce the cost of maintenance, lower housing costs, reduce
the cost of power that would have been used, as well as they are eco-friendly. Overall, it will
enhance the performance of the system as it promotes long distance communication.

DIGITAL MICROWAVE RADIO SYSTEM 6
References
Cameron, R. J., Kudsia, C. M., & Mansour, R. (2015). Microwave filters for communication
systems. John Wiley & Sons.