Phase shifted transmitted signals in a simultaneous dual polarization weather system
First Claim
1. A radar system, comprising:
- a. a waveform generator configured to generate a first signal and a second signal, said first signal having a different phase from said second signal;
b. amplifiers configured to amplify said first and second signals;
c. an antenna configured to simultaneously propagate said amplified first signal in a first plane and said amplified second signal in a second plane angularly rotated from said first plane; and
d. a receiver configured to receive a first reflected signal having the phase of said first signal and a second reflected signal having a phase of said second amplified signal.
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Abstract
A system for simultaneously propagating dual polarized signals in a polarimetric radar system includes a system for shifting the phase of one of the two signals. The simultaneous dual polarization weather radar transmits signals in both the horizontal and vertical orientations at the same time. Upon reception, the signals in each channel are isolated and a number of standard and polarimetric parameters characterizing atmospheric conditions are determined. The accuracy upon which these parameters can be determined depends partially upon the interference between these two channels. The system and method isolates the vertical and horizontal channels by using the phase information from the signals to minimize the interference.
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Citations
42 Claims
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1. A radar system, comprising:
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a. a waveform generator configured to generate a first signal and a second signal, said first signal having a different phase from said second signal;
b. amplifiers configured to amplify said first and second signals;
c. an antenna configured to simultaneously propagate said amplified first signal in a first plane and said amplified second signal in a second plane angularly rotated from said first plane; and
d. a receiver configured to receive a first reflected signal having the phase of said first signal and a second reflected signal having a phase of said second amplified signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for processing simultaneous dual polarized signals from a radar system, comprising the steps of:
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a. receiving a first signal from a reflected source, said first received signal including a portion of a first transmitted signal and a portion of a second transmitted signal, said first transmitted signal shaped differently than said first transmitted signal;
b. receiving a second signal from a reflected source, said second received signal including a portion of said first transmitted signal and a portion of said second transmitted signal; and
c. decoding said first and second received signals by comparing said first transmitted signal with said first and second received signals. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A radar system comprising:
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a. an oscillator configured to generate a low power signal;
b. an amplifier configured to amplify said low power signal to a high power signal;
c. a power divider configured to split said high power signal into a first signal and a second signal;
d. a high powered shifting device configured to shift said first signal;
e. an antenna configured to simultaneously propagate said first signal in a first plane and said second signal in a second plane angularly rotated from said first plane; and
f. a receiver configured to receive a first reflected signal having the shape of said first signal and a second reflected signal having a shape of said second signal. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method for propagating simultaneous dual polarized signals from a radar system, comprising the steps of:
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a. generating a first signal and a second signal;
b. shifting said first signal such that said first signal and said second signal are phased differently; and
c. propagating said first signal on a first plane and said second signal on a second plane, said second plane rotated from said first plane. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42)
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Specification