Active channelized integrated antenna system
An active channelized antenna system includes an antenna array operable over a multi-octave frequency band to provide one or more antenna output signals. An electronics module includes multiplexer circuitry responsive to the one or more antenna output signals configured to divide an input signal spectrum into a plurality of frequency band components each of less than an octave bandwidth. The electronics module includes a plurality of amplifiers each of less than an octave bandwidth to provide an amplified component signal for a respective frequency band. Combiner circuitry included with the electronics module is configured to combine the amplified frequency band components into a composite signal. A transmission medium such as a coaxial cable, fiber optic line or free space, is configured to transmit the composite signal to a remotely located receiver system. The antenna system may be employed as a repeater system.
1. An active channelized antenna system comprising:
an antenna array operable over a multi-octave frequency band of an input signal spectrum to provide one or more antenna output signals;
an electronics module comprising:
a plurality of baluns coupled to the one or more antenna output signals, respectively,
a plurality of limiters each coupled to an output of a respective balun,
a plurality of random noise generators,
a plurality of multiplexers each coupled to an output of a respective limiter and a respective random noise generator and configured to divide an input signal spectrum in said multi-octave frequency band into a plurality of channelized frequency band components each of less than an octave bandwidth, and
a plurality of amplifiers each of less than an octave bandwidth to provide an amplified component signal for a respective frequency band;
combiner circuitry for combining the amplified frequency band components into a composite signal which replicates the input signal spectrum; and
a transmission medium for transmitting the composite signal to a remotely located receiver system.
2. The system of claim 1 , wherein the transmission medium includes a coaxial cable.
3. The system of claim 1 , wherein the antenna array comprises a dual polarization sinuous antenna, providing a first antenna output of a first polarization sense and a second antenna output of a second polarization sense.
4. The system of claim 3 , wherein said electronics module comprising a switch circuit for selecting either said first antenna output or said second antenna output for input to said multiplexer circuitry.
5. The system of claim 3 , wherein the antenna array further includes a spiral antenna.
6. The system of claim 5 , wherein said sinuous antenna and said spiral antenna are fabricated on a dielectric radome structure mounted on an aircraft.
7. The system of claim 1 , wherein said combiner circuitry is band-matched to each of said less than an octave bandwidths such that there is no interference.
8. The system of claim 1 , wherein said multi-octave band includes a frequency range from 3.5 GHz to 18 GHz.
9. The system of claim 8 , wherein said frequency band components each of less than an octave bandwidth includes a first band component at a frequency band between about 3.5 GHz and about 6.5 GHz, a second band component at a frequency band between about 6.5 GHz and 12 GHz, and a third band component at a frequency band between about 12 GHz and 18 GHz.
10. The system of claim 1 , wherein the plurality of amplifiers includes a plurality of low noise amplifiers.