Boots – shoes – and leggings
Patent
1981-12-09
1984-05-15
Gruber, Felix D.
Boots, shoes, and leggings
343417, 343446, 364514, G06F 1520, G01S 346, G01S 348
Patent
active
044491921
ABSTRACT:
This invention relates to a radio wave angle of incidence measurement apparatus which is applicable to radar and other detection systems, and which utilizes an antenna array with radiator elements distributed at a spacing larger than one half of the propagation wavelength. A radio signal is received by an antenna array that exhibit at least two different values of d/.lambda. (where d is the inter-element spacing of the radiator elements, .lambda. the propagation wavelength), and the resultant inter-element phase differences, of which there are at least two sets, are digitally measured. A phase difference converter circuit receives the digital signals representing the inter-element phase differences and processes them and generates an output signal that varies monotonically as the incident angle of the radio signal incident on the antenna array varies.
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Hashimoto Naoki
Tamama Tetsuo
Watanabe Masaru
Yamauchi Nobuharu
Adams Bruce L.
Burns Robert E.
Gruber Felix D.
Lobato Emmanuel J.
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