Page
All Rights Reserved Shyam Telecom Limited 12/36
Next Generation
Signal Enhancement
building shadowing and the available forward signal level at the donor
antenna. Typical coverage is usually planned for relatively small areas
such as large conference rooms or several adjacent rooms in smaller
office areas. Figure 1 shows application of an indoor repeater in a small
building. Coverage is primarily determined by the available forward signal
level at the outdoor yagi antenna input, loss due to the RF cable length,
type of RF cable installed and achievable isolation for optimum
R-20-930
performance. Indoor coverage varies greatly due to the nature of various
building construction techniques and materials. Approximations of signal
level/coverage can be determined with the following assumptions:
i. 12 dBi donor antenna. 7dBi indoor directional antenna.
ii. Installed total cable and connector loss of approximately 5 dB
for 40 Meters (125 feet) of typical 1/4” coaxial foam cable.
iii. Interior building structure consists of typical vertical stud and
drywall composition.
iv. Isolation should be 15 dB more than the gain set for the repeater.
