Hybrid Passive Active Broadband Antenna for a Distributed Antenna System
a broadband antenna and passive active technology, applied in the direction of frequency-division multiplex, receiver monitoring, transmitter monitoring, etc., can solve the problem of introducing interference between bands that requires the use of bulky and expensive filters to mitigate, and the cable length of different antennas is not equal, so as to reduce the coverage radius, increase the cost of adding more antennas, and reduce the effect of the coverage radius
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[0042]The present invention is directed to a method and system for compensating for cable losses in distributed antenna systems. In accordance with one embodiment of the invention, the system includes a measurement component adapted to receive a measurement signal having a known frequency and power level and for determining or estimating the losses of a signal transmitted at one end of the cable run and received at the other end of the cable run. In accordance with the invention, the system further includes an equalization component adapted for receiving the information about the determined or estimated cable run losses and for adjusting the signal level to a predetermined value. Each cable run in the DAS can include the system according to the invention whereby the signal levels of each cable run can be adjusted to the predetermined value. In one embodiment, the signal level corresponding a particular service or frequency range or band at the connection to the antenna unit can adju...
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