Antenna system for radiating doppler coded pattern using multiple beam antenna

Claim 2

An antenna system for radiating wave energy into a desired region of space during a selected time period in a desired radiation pattern, wherein the frequency of said radiated energy within said region of space varies with at least one of the components of angular direction from said antenna system comprising: an antenna unit capable of radiating a plurality of beams in different directions within said region of space from a common aperture, and having a plurality of wave energy input ports such that each of said ports corresponds to one of said beams; and means for simultaneously supplying a plurality of wave energy signals during said time period, one to each of said ports of said antenna unit, each of said wave energy signals having a phase, measured with respect to the phase of the wave energy signal supplied to the port corresponding to an adjacent antenna beam, which varies during said time period between a predetermined pair of values, said variation being less than 360* and the sense of said variation being alike for pairs of antenna ports corresponding to similarly adjacent beams; whereby when said signals are supplied to said antenna ports, said antenna radiates said desired radiation pattern.

Claim 3

An antenna system for radiating wave energy into a desired region of space during a selected time period in a desired radiation pattern, wherein the frequency of said radiated energy within said region of space varies with at least one of the components of angular direction from said antenna system comprising: an antenna unit capable of radiating a plurality of beams in different directions within said region of space from a common aperture, and having a plurality of wave energy input ports such that each of said ports corresponds to one of said beams; means for individually controlling the phase of wave energy signals supplied to each of the ports of said antenna unit such that each of saId wave energy signals has a phase, measured with respect to the phase of the wave energy signal supplied to the port corresponding to an adjacent antenna beam, which varies during said time period between a predetermined pair of values, said variation being less than 360* and the sense of said variation being alike for pairs of antenna ports corresponding to similarly adjacent beams; and means for simultaneously supplying wave energy signals during said time period to said antenna ports via said phase control means; whereby when said wave energy signals are controlled by said phase control means and supplied to said antenna ports, said antenna radiates said desired radiation pattern.

Claim 4

An antenna system for radiating wave energy into a desired region of space during a selected time period in a desired radiation pattern, wherein the frequency of said radiated energy within said region of space varies with at least one of the components of angular direction from said antenna system comprising: an antenna unit capable of radiating a plurality of beams in different directions within said region of space from a common aperture, and having a plurality of wave energy input ports such that each of said ports corresponds to one of said beams; means for individually controlling the phase of wave energy signals supplied to each of the ports of said antenna unit such that each of saId wave energy signals has a phase, measured with respect to the phase of the wave energy signal supplied to the port corresponding to an adjacent antenna beam, which varies during said time period between a predetermined pair of values, said variation being less than 360* and the sense of said variation being alike for pairs of antenna ports corresponding to similarly adjacent beams; and means for simultaneously supplying wave energy signals during said time period to said antenna ports via said phase control means; whereby when said wave energy signals are controlled by said phase control means and supplied to said antenna ports, said antenna radiates said desired radiation pattern.

Claim 5

An antenna system as specified in claim 2 wherein each of said wave energy signals is controlled to have a phase which varies linearly with time between said predetermined pair of values.

Claim 6

An antenna system as specified in claim 2 wherein said wave energy signals are supplied to the ports of said antenna during a succession of said periods.

Claim 7

An antenna system as specified in claim 2 wherein said means for controlling the phase of the supplied wave energy signals comprises a plurality of phase shifters and means for controlling said phase shifters.

Claim 8

An antenna system for radiating wave energy into a desired region of space during a selected time period in a desired radiation pattern wherein the frequency of said radiated energy within said region of space varies with at least one of the components of angular direction from said antenna system, comprising: an antenna unit capable of radiating a plurality of beams in different directions within said region of space from a common aperture and comprising means for focusing incident wave energy and a plurality of feed elements, each having a wave energy input port, for illuminating said focusing means with wave energy patterns such that each of said feed elements corresponds to one of said beams; means for individually controlling the phase of wave energy signals supplied to each of the ports of said antenna unit such that each of said wave energy signals has a phase, measured with respect to the phase of the wave energy signal supplied to the port corresponding to an adjacent antenna beam, which varies during said time period between a predetermined pair of values, said variation being less than 360* and the sense of said variation being alike for pairs of antenna ports corresponding to similarly adjacent beams; and means for simultaneously supplying wave energy signals during said time period to said ports via said phase control means; whereby when said wave energy signals are controlled by said phase control means and supplied to said ports, said antenna unit radiates said desired radiation pattern.

Claim 9

An antenna system for radiating wave energy into a desired region of space during a selected time period in a desired radiation pattern wherein the frequency of said radiated energy within said region of space varies with at least one of the components of angular direction from said antenna system, comprising: an antenna unit capable of radiating a plurality of beams in different directions within said region of space from a common aperture and comprising means for focusing incident wave energy and a plurality of feed elements, each having a wave energy input port, for illuminating said focusing means with wave energy patterns such that each of said feed elements corresponds to one of said beams; means for individually controlling the phase of wave energy signals supplied to each of the ports of said antenna unit such that each of said wave energy signals has a phase, measured with respect to the phase of the wave energy signal supplied to the port corresponding to an adjacent antenna beam, which varies during said time period between a predetermined pair of values, said variation being less than 360* and the sense of said variation being alike for pairs of antenna ports corresponding to similarly adjacent beams; and means for simultaneously supplying wave energy signals during said time period to said ports via said phase control means; whereby when said wave energy signals are controlled by said phase control means and supplied to said ports, said antenna unit radiates said desired radiation pattern.

Claim 10

An antenna system for radiating wave energy into a desired region of space during a selected time period in a radiation pattern wherein the frequency of said radiated energy within said region of space varies with at least one of the components of angular direction from said antenna system comprising: an antenna unit capable of radiating a plurality of beams in different directions within said region of space from a common aperture and comprising a parabolic cylindrical reflector for focusing incident wave energy and a plurality of feed elements, each having a wave energy input port, for illuminating said reflector with wave energy patterns such that each of said feed elements corresponds to one of said beams; a number of phase shifters equal to the number of said feed elements for individuallly controlling the phase of wave energy signals supplied to each of the ports of said antenna unit; means for controlling said phase shifters such that the phase of wave energy signals supplied to each of said phase shifters is shifted to a phase, measured with respect to the phase of the wave energy signal supplied to the port corresponding to an adjacent antenna beam, wHich varies during said time period between a predetermined pair of values, said variation being less than 360* and the sense of said variation being alike for pairs of antenna ports corresponding to similarly adjacent beams; and means for simultaneously supplying wave energy signals during said time period to said ports via said phase shifters; whereby when said wave energy signals are controlled by said phase shifters and supplied to said ports, said antenna unit radiates said desired radiation pattern.

Claim 11

An antenna system for radiating wave energy into a desired region of space during a selected time period in a radiation pattern wherein the frequency of said radiated energy within said region of space varies with at least one of the components of angular direction from said antenna system comprising: an antenna unit capable of radiating a plurality of beams in different directions within said region of space from a common aperture and comprising a parabolic cylindrical reflector for focusing incident wave energy and a plurality of feed elements, each having a wave energy input port, for illuminating said reflector with wave energy patterns such that each of said feed elements corresponds to one of said beams; a number of phase shifters equal to the number of said feed elements for individuallly controlling the phase of wave energy signals supplied to each of the ports of said antenna unit; means for controlling said phase shifters such that the phase of wave energy signals supplied to each of said phase shifters is shifted to a phase, measured with respect to the phase of the wave energy signal supplied to the port corresponding to an adjacent antenna beam, wHich varies during said time period between a predetermined pair of values, said variation being less than 360* and the sense of said variation being alike for pairs of antenna ports corresponding to similarly adjacent beams; and means for simultaneously supplying wave energy signals during said time period to said ports via said phase shifters; whereby when said wave energy signals are controlled by said phase shifters and supplied to said ports, said antenna unit radiates said desired radiation pattern.

Claim 12

An antenna system for radiating wave energy into a desired region of space during a selected time period in a desired radiation pattern wherein the frequency of said radiated energy within said region of space varies with at least one of the components of angular direction from said antenna system, comprising: an antenna unit capable of radiating a plurality of beams in different directions within said region of space from a common aperture and comprising an array of antenna elements, a plurality of wave energy input ports and means for coupling each of said ports to said elements such that each of said ports corresponds to one of said beams; means for individually controlling the phase of wave energy signals supplied to each of said antenna ports such that each of said wave energy signals has a phase, measured with respect to the phase of the wave energy signal supplied to the port corresponding to an adjacent antenna beam, which varies during said time period between a predetermined pair of values, said variation being less than 360* and the sense of said variation being alike for pairs of antenna ports corresponding to similarly adjacent beams; means for simultaneously supplying wave energy signals during said time period to said antenna ports via said phase control means; whereby when said wave energy signals are controlled by said phase control means and supplied to said antenna ports, said antenna unit radiates said desired radiation pattern.

Claim 13

An antenna system for radiating wave energy into a desired region of space during a selected time period in a desired radiation pattern wherein the frequency of said radiated energy within said region of space varies with at least one of the components of angular direction from said antenna system, comprising: an antenna unit capable of radiating a plurality of beams in different directions within said region of space from a common aperture and comprising an array of antenna elements, a plurality of wave energy input ports and means for coupling each of said ports to said elements such that each of said ports corresponds to one of said beams; means for individually controlling the phase of wave energy signals supplied to each of said antenna ports such that each of said wave energy signals has a phase, measured with respect to the phase of the wave energy signal supplied to the port corresponding to an adjacent antenna beam, which varies during said time period between a predetermined pair of values, said variation being less than 360* and the sense of said variation being alike for pairs of antenna ports corresponding to similarly adjacent beams; means for simultaneously supplying wave energy signals during said time period to said antenna ports via said phase control means; whereby when said wave energy signals are controlled by said phase control means and supplied to said antenna ports, said antenna unit radiates said desired radiation pattern.

Claim 14

An antenna system, as specified in claim 8 wherein the means for coupling said antenna ports to said elements comprises a matrix of transmission lines and couplers.

Claim 15

An antenna system for radiating wave energy into a desired region of space during a selected time period in a desired radiation pattern, wherein the frequency of said radiated wave energy within said region of space varies with at least one of the components of angular direction from said antenna system, comprising: an antenna unit capable of radiating a plurality of beams in different directions within said region of space from a common aperture and comprising a linear array of antenna elements, spaced from each other by substantially equal distances, a number of wave energy input ports, equal to the number of antenna elements, and a Bulter Matrix for coupling each of said ports to all of said elements, such that each of said ports corresponds to one of said beams; a number of phase shifters, equal to the number of said ports for individually controlling the phase of wave energy signals supplied to each of the ports of said antenna unit; means for controlling said phase shifters such that the phase of wave energy signals supplied to each of said phase shifters is shifted to a phase, measured with respect to the phase of the wave energy signal supplied to the port corresponding to an adjacent antenna beam, which varies during said time period between a predetermined pair of values, said variation being less than 360* and the sense of said variation being alike for pairs of antenna ports corresponding to similarly adjacent beams; and means for simultaneously supplying wave energy signals during said time period to said ports via said phase shifters; whereby when said wave energy signals are controlled by said phase shifters and supplied to said ports, said antenna unit radiates said desired radiation pattern.

Claim 16

An antenna system for radiating wave energy into a desired region of space during a selected time period in a desired radiation pattern, wherein the frequency of said radiated wave energy within said region of space varies with at least one of the components of angular direction from said antenna system, comprising: an antenna unit capable of radiating a plurality of beams in different directions within said region of space from a common aperture and comprising a linear array of antenna elements, spaced from each other by substantially equal distances, a number of wave energy input ports, equal to the number of antenna elements, and a Bulter Matrix for coupling each of said ports to all of said elements, such that each of said ports corresponds to one of said beams; a number of phase shifters, equal to the number of said ports for individually controlling the phase of wave energy signals supplied to each of the ports of said antenna unit; means for controlling said phase shifters such that the phase of wave energy signals supplied to each of said phase shifters is shifted to a phase, measured with respect to the phase of the wave energy signal supplied to the port corresponding to an adjacent antenna beam, which varies during said time period between a predetermined pair of values, said variation being less than 360* and the sense of said variation being alike for pairs of antenna ports corresponding to similarly adjacent beams; and means for simultaneously supplying wave energy signals during said time period to said ports via said phase shifters; whereby when said wave energy signals are controlled by said phase shifters and supplied to said ports, said antenna unit radiates said desired radiation pattern.

Claim 17

An antenna system as specified in claim 6 whErein said predetermined pair of values for the phase of the wave energy supplied to each of said ports comprises a first phase value selected to cause the wave energy radiated by all of said feed elements to form a phase front for illuminating a first selected area on said focusing means and a second phase value selected to cause the wave energy radiated by all of said feed elements to form a phase front for illuminating a second selected area on said focusing means.

Claim 18

An antenna system as specified in claim 11 wherein each of said wave energy signals is controlled to have a phase which varies linearly with time between said predetermined pair of values.

Claim 19

An antenna system as specified in claim 7 wherein said predetermined pair of values for the phase of wave energy supplied to each of said ports comprises a first phase value selected to cause the wave energy radiated by all of said feed elements to form a phase front for illuminating a first selected area on said reflector and a second phase value selected to cause the wave energy radiated by all of said feed elements to form a phase front for illuminating a second selected area on said reflector.

Claim 20

An antenna system as specified in claim 13 wherein said first and second selected areas on said reflector are displaced from each other in a direction which is perpendicular to the focal axis of said reflector.

Claim 21

An antenna system as specified in claim 14 wherein each of said wave energy signals is controlled to have a phase which varies linearly with time between said predetermined pair of values.

Claim 22

An antenna system as specified in claim 7 wherein said wave energy signals are supplied to the ports of said antenna during a succession of said periods.