Antenna which assures high speed data rate transmission links between satellites and between satellites and ground stations
First Claim
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1. An antenna for high-rate data transmission for a satellite, comprising:
- a rectangular phased array of mutually adjacent rectangular subarrays having an aperiodic configuration and perfectly filling a rectangular area of the phased array, each of said rectangular subarrays having a length twice a width of the subarray and formed with eight radiating elements spaced apart in two rows of four radiating elements each with the radiating elements of the rows being equidistant from one another and the radiating elements of each row being at the same distance from the corresponding element of the other row as the radiating elements of each row are spaced apart;
a first series of said subarrays extending horizontally consisting essentially of groups of two successive horizontal subarrays separated by a vertical subarray;
a second series of said subarrays adjacent said first series extending horizontally and consisting essentially of a succession of another vertical subarray, a horizontal subarray, a further vertical subarray and a vertical subarray extending into the second series from said first series;
a third series of said subarrays adjacent said second series extending horizontally and consisting essentially of a succession of a vertical subarray extending into said third series from said second series, a horizontal subarray, another vertical subarray extending into said third series from said second series, and another vertical subarray;
a fourth series of said subarrays adjacent said third series extending horizontally and consisting essentially of a succession of two vertical subarrays, a horizontal subarray and a vertical subarray extending into said fourth series from said third series;
a fifth series of said subarrays adjacent said fourth series extending horizontally and consisting essentially of a succession of two vertical subarrays extending into said fifth series from said fourth series, another vertical subarray and a horizontal subarray; and
a sixth series of said subarrays adjacent said fifth series extending horizontally and consisting essentially of a succession of a horizontal subarray, a vertical subarray extending into said sixth series from said fifth series, and another horizontal subarray;
said phased array being capable of scanning such that no grating lobe enters a field of view of the phased array.
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Abstract
An antenna is composed of a number of subarray radiating elements, with an aperiodic geometry, which assures connections between satellites and between satellites and ground stations. The aperiodic structure makes it possible to eliminate possible interference acting on the connection. The possible presence of the array grating lobes during steering of the array beams in the angular sector of interest is reduced. The presence of a grating lobe within the field of view which can cause interference with another low orbiting satellite is avoided, so as to improve reception quality characteristics. The invention is applicable to microwave antennas and space-borne systems by eliminating the presence of grating lobes in the field of view.
21 Citations
2 Claims
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1. An antenna for high-rate data transmission for a satellite, comprising:
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a rectangular phased array of mutually adjacent rectangular subarrays having an aperiodic configuration and perfectly filling a rectangular area of the phased array, each of said rectangular subarrays having a length twice a width of the subarray and formed with eight radiating elements spaced apart in two rows of four radiating elements each with the radiating elements of the rows being equidistant from one another and the radiating elements of each row being at the same distance from the corresponding element of the other row as the radiating elements of each row are spaced apart; a first series of said subarrays extending horizontally consisting essentially of groups of two successive horizontal subarrays separated by a vertical subarray; a second series of said subarrays adjacent said first series extending horizontally and consisting essentially of a succession of another vertical subarray, a horizontal subarray, a further vertical subarray and a vertical subarray extending into the second series from said first series; a third series of said subarrays adjacent said second series extending horizontally and consisting essentially of a succession of a vertical subarray extending into said third series from said second series, a horizontal subarray, another vertical subarray extending into said third series from said second series, and another vertical subarray; a fourth series of said subarrays adjacent said third series extending horizontally and consisting essentially of a succession of two vertical subarrays, a horizontal subarray and a vertical subarray extending into said fourth series from said third series; a fifth series of said subarrays adjacent said fourth series extending horizontally and consisting essentially of a succession of two vertical subarrays extending into said fifth series from said fourth series, another vertical subarray and a horizontal subarray; and a sixth series of said subarrays adjacent said fifth series extending horizontally and consisting essentially of a succession of a horizontal subarray, a vertical subarray extending into said sixth series from said fifth series, and another horizontal subarray; said phased array being capable of scanning such that no grating lobe enters a field of view of the phased array. - View Dependent Claims (2)
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Specification
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Current AssigneeSpace Engineering SRL
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Original AssigneeSpace Engineering SRL
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InventorsRusso, Pasquale
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Primary Examiner(s)Wimer, Michael C.
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Application NumberUS07/768,235Time in Patent Office767 DaysField of Search343/700 MS, 343/897, 343/844US Class Current343/700.0MSCPC Class CodesH01Q 21/22 Antenna units of the array ...
