Wave detection apparatus

Claim 2

Wave detection apparatus comprising a parabolic antenna having an upper half section and a separate lower half section, a feed horn disposed substantially at the focal point of said antenna, means for supporting said upper antenna section for reciprocating movement toward and away from said feed horn at a first frequency, means for supporting said lower section for reciprocating movement toward and away from said feed horn at a second frequency different from said first frequency, said upper and lower sections being spaced apart in the direction toward the feed horn by one-quarter wavelength at the antenna operating frequency, and receiver means connected to said feed horn, said receiver means comprising a first frequency filter adapted to pass signals at said first frequency and to block signals at the second frequency, a second frequency filter adapted to pass signals at the second frequency and to block signals at the first frequency, and signal indicator means connected to the outputs of said first and second filters.

Claim 3

Wave detection apparatus comprising an antenna having an upper section and a separate lower section, a feed horn disposed on one side of the antenna for receiving electromagnetic energy reflected by said antenna, means for supporting said upper antenna section for reciprocating movement toward and away from said feed horn at a first frequency, means for supporting said lower section for reciprocating movement toward and away from said feed horn at a second frequency different from said first frequency, said upper and lower sections being spaced apart in the direction toward the feed horn by one-quarter wavelength at the antenna operating frequency, and receiver means connected to said feed horn, said receiver means comprising a first frequency filter adapted to pass signals at said first frequency and to block signals at the second frequency, a second frequency filter adapted to pass signals at the second frequency and to block signals at the first frequency, and signal indicator means connected to the outputs of said first and second filters.

Claim 4

Wave detection apparatus comprising an antenna having an upper section and a separate lower section, a feed horn disposed on one side of the antenna for receiving electromagnetic energy reflected by said antenna, means for supporting said upper antenna section for reciprocating movement toward and away from said feed horn at a first frequency, means for supporting said lower section for reciprocating movement toward and away from said feed horn at a second frequency different from said first frequency, said upper and lower sections being spaced apart in the direction toward the feed horn by one-quarter wavelength at the antenna operating frequency, and receiver means connected to said feed horn, said receiver means comprising a first frequency filter adapted to pass signals at said first frequency and to block signals at the second frequency, a second frequency filter adapted to pass signals at the second frequency and to block signals at the first frequency, and signal indicator means connected to the outputs of said first and second filters.

Claim 5

Wave detection apparatus adapted to receive electromagnetic energy from a remote object, comprising an antenna having an upper section and a separate lower section, means for supporting said upper antenna section for reciprocating movement in a direction toward and away from said object at a first frequency, means for supporting said lower section for reciprocating movement toward and away from said object at a second frequency different from said first frequency, said upper and lower sections being spaced apart in the direction toward the object by one-quarter wavelength at the antenna operating frequency, and receiver means arranged to receive electromagnetic waves intercepted by said antenna comprising frequency discriminating means for separating electromagnetic waves modulated at said first and second frequencies, respectively, and indicator means connected to the output of said frequency discriminating means.

Claim 6

Wave detection apparatus adapted to receive electromagnetic energy from a remote object, comprising an antenna having an upper section and a separate lower section, means for supporting said upper antenna section for reciprocating movement in a direction toward and away from said object at a first frequency, means for supporting said lower section for reciprocating movement toward and away from said object at a second frequency different from said first frequency, said upper and lower sections being spaced apart in the direction toward the object by one-quarter wavelength at the antenna operating frequency, and receiver means arranged to receive electromagnetic waves intercepted by said antenna comprising frequency discriminating means for separating electromagnetic waves modulated at said first and second frequencies, respectively, and indicator means connected to the output of said frequency discriminating means.

Claim 7

Electromagnetic wave detection apparatus comprising a parabolic antenna having an upper section and a separate lower section, a feed horn disposed substantially at the focal point oF said antenna, means for supporting said upper antenna section for reciprocating movement toward and away from said feed horn at a first frequency, means for supporting said lower section for reciprocating movement toward and away from said feed horn at a second frequency different from said first frequency, said upper and lower sections being spaced apart in the direction toward the feed horn by one-quarter wavelength at the antenna operating frequency, and receiver means connected to said feed horn comprising frequency discriminating means adapted to separate electromagnetic waves modulated at said first and second frequencies, respectively, and indicator means connected to the output of said frequency discriminating means for indicating the reception of said separated waves.

Claim 8

Electromagnetic wave detection apparatus comprising a parabolic antenna having an upper section and a separate lower section, a feed horn disposed substantially at the focal point oF said antenna, means for supporting said upper antenna section for reciprocating movement toward and away from said feed horn at a first frequency, means for supporting said lower section for reciprocating movement toward and away from said feed horn at a second frequency different from said first frequency, said upper and lower sections being spaced apart in the direction toward the feed horn by one-quarter wavelength at the antenna operating frequency, and receiver means connected to said feed horn comprising frequency discriminating means adapted to separate electromagnetic waves modulated at said first and second frequencies, respectively, and indicator means connected to the output of said frequency discriminating means for indicating the reception of said separated waves.

Claim 9

Wave detection apparatus comprising an antenna having at least two relatively movable wave reflecting surfaces adapted to reflect electromagnetic waves received from the same direction, said surfaces being spaced from each other along said direction by one-quarter of a wavelength at the operating frequency of the antenna, means to reciprocate said surfaces at relatively different rates, and means for receiving waves reflected from said surfaces and for discriminating between waves modulated at said different rates.

Claim 10

Wave detection apparatus comprising an antenna having at least two relatively movable wave reflecting surfaces adapted to reflect electromagnetic waves received from the same direction, said surfaces being spaced from each other along said direction by one-quarter of a wavelength at the operating frequency of the antenna, means to reciprocate said surfaces at relatively different rates, and means for receiving waves reflected from said surfaces and for discriminating between waves modulated at said different rates.