Antenna optimization design with enhanced performance under equal area

Abstract

The invention relates to the technical field of antenna design, and provides an antenna optimization design with enhanced performance under equal area, an antenna beam profile is linear along an x axis and a y axis and is used for a beam profile generated by an X spoke, and when the antenna spoke is rectangular and a plurality of antennas are arranged along a narrow size, the beam width can be controlled in x and y dimensions, and the beam profile can be controlled in the X and y dimensions. The beam contours appear similar. For a simple view, the present disclosure focuses on the situation where a vertical linear antenna array is used. When a non-linear, rectangular antenna array is used, the generated beam is two-dimensional, rather than one-dimensional.

Description

Technical Field

[0001] The present invention relates to the technical field of antenna design, and specifically, to an optimized antenna design with enhanced performance under equal area. Background Art

[0002] Traditional satellite antenna designs usually face the challenge of space limitations, which restricts the performance of the antenna. To improve the performance of the antenna, a common method is to increase the size of the antenna, but this will lead to an increase in the volume of the antenna. Summary of the Invention

[0003] The present invention proposes an optimized antenna design with enhanced performance under equal area to solve the problems raised in the background art.

[0004] The technical solution of the present invention is as follows: The antenna beam profile of the present invention is linear along the x-axis and the y-axis. This simplification, as Figure 1 shown, for the beam profile used to generate X spokes, when the antenna spokes are rectangular and there are multiple antennas along the narrow dimension, in addition to the beam width being controllable in both the x and y dimensions, the beam profile will look similar. For simplicity, the present disclosure will focus on the case of using a vertical linear antenna array. When using a non-linear, rectangular antenna array, the generated beam is two-dimensional rather than one-dimensional.

[0005] Furthermore, in the simplified case where the beam profile is approximately linear, an array of x beams and y beams is thus formed. When a signal arrives at the satellite x and y line antenna array spokes, the position of the radio wave source can be estimated by converting the phase difference observed along the antenna spokes into the angle and elevation of the propagating radio wave, and then into the position on the earth. This can be visualized using the 2D matrix shown in the figure. After adjusting the non-linear beam profile, the positions of the rows and columns will be converted into positions on the earth.

[0006] Furthermore, a 128 - antenna - element linear array can generate approximately 64 non - overlapping beams on the ground, covering an elevation angle range of 45 degrees. A dual - spoke linear antenna array system, with 128 antennas per spoke and 64 non - overlapping beams using 64 - ary FSK modulation, has a spectral efficiency approximately 700 times that of a single - antenna receiver using 64 - ary FSK modulation. For the same amount of bandwidth, this means a 700 - fold increase in network capacity. Compared with a single - antenna receiver using 2 - FSK modulation, the spectral efficiency of the same dual - antenna spoke system using 64 - ARY FSK modulation is increased by approximately 150 times. A standard square antenna array with 128 elements per spoke, and the array size of the two - spoke linear array is approximately 16x16 antenna elements, generating 8x8 = 64 non - overlapping beams within a 45 - degree elevation angle range. The dual - spoke linear antenna array receiving 64 - ary FSK signals has a network capacity approximately 700 / 64 = 10.9 times higher than that of a 16x16 square antenna array receiving 64 - ary FSK signals, and approximately 150 / 64 = 2.3 times higher than that of a 16x16 square antenna array receiving 2 - FSK modulation signals. Another advantage of using multiple spoke antenna arrays compared to square antenna arrays is that for the same antenna volume, the position of terminals on the ground can be estimated with higher accuracy. The position accuracy along the x or y dimension is inversely proportional to the length of the antenna array along each dimension. Two linear antenna arrays with 128 elements each along the x and y directions can estimate the terminal position approximately 8 times more accurately than a 16×16 - element square antenna array (assuming the same antenna spacing for linear and square antenna arrays).

[0007] The working principle and beneficial effects of the present invention are as follows:

[0008] 1. The innovation of the present invention lies in optimizing and adjusting the layout of antennas to improve the performance of antennas under the limitation of equal area.

[0009] 2. The innovation of the present invention lies in optimizing and adjusting the layout of antennas to improve the performance of antennas under the limitation of equal area. By reasonably adjusting the positions of antenna elements, the receiving capacity of the antenna can be increased and the positioning accuracy of the received signal can be enhanced.

[0010] 3. Under the limitation of equal area, the performance of the antenna is improved, meeting the performance requirements in a limited space. By reasonably adjusting the positions of antenna elements, the receiving capacity and signal positioning accuracy of the antenna are improved. Description of the Drawings

[0011] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0012] Figure 1 Beams generated by X - antenna spokes

[0013] Figure 2 The beam generated by the Y - antenna spokes;

[0014] Figure 3 The row beams and column beams generated by the dual - spoke linear antenna structure. Detailed implementation mode

[0015] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of the present invention.

[0016] As Figures 1 to 3 shown, this embodiment proposes an antenna optimization design with enhanced performance under equal area. The antenna beam profile of the present invention is linear along the x - axis and y - axis. This simplification is as Figure 1 shown, for the beam profile generated by the X - spokes, as Figure 2 shown for the beam profile generated by the Y - spokes. When the antenna spokes are rectangular and there are multiple antennas along the narrow dimension, in addition to the beam width being controllable in both the x and y dimensions, the beam profiles will look similar. For simplicity, this disclosure will focus on the case of using a vertical linear antenna array. When using a non - linear, rectangular antenna array, the generated beam is two - dimensional rather than one - dimensional.

[0017] Furthermore, in the simplified case where the beam profile is approximately linear, Figure 3 shows the superimposed beam profiles of two perpendicular linear antenna arrays, thus forming an array of x - beams and y - beams. When a signal arrives at the satellite x - and y - line antenna array spokes, the position of the radio - wave source can be estimated by converting the phase difference observed along the antenna spokes into the angle and elevation of the propagating radio wave, and then into the position on the earth. This can be visualized using the 2D matrix shown in the figure. After adjusting the non - linear beam profile, the row and column positions will be converted into positions on the earth.

[0018] Furthermore, a 128-antenna element linear array can generate approximately 64 non-overlapping beams on the ground, covering an elevation angle range of 45 degrees. A dual-spoke linear antenna array system, with 128 antennas per spoke and 64 non-overlapping beams using 64-ary FSK modulation, has approximately 700 times the spectral efficiency compared to a single-antenna receiver using 64-ary FSK modulation. For the same amount of bandwidth, this means a 700-fold increase in network capacity. Compared to a single-antenna receiver using 2-FSK modulation, the spectral efficiency of the same dual-antenna spoke system using 64-ARY FSK modulation is increased by approximately 150 times. A standard square antenna array, with 128 elements per spoke, and the array size of the two-spoke linear array is approximately 16x16 antenna elements, generating 8x8 = 64 non-overlapping beams within a 45-degree elevation angle range. The dual-spoke linear antenna array receiving 64-ary FSK signals has a network capacity increase of approximately 700 / 64 = 10.9 times compared to the 16x16 square antenna array receiving 64-ary FSK signals, and a network capacity increase of approximately 150 / 64 = 2.3 times compared to the 16x16 square antenna array receiving 2-FSK modulation signals. Another advantage of using multiple spoke antenna arrays compared to square antenna arrays is that for the same antenna volume, the position of terminals on the ground can be estimated with higher precision. The position accuracy along the x or y dimension is inversely proportional to the length of the antenna array along each dimension. Two linear antenna arrays with 128 elements each along the x and y directions can estimate the terminal position approximately 8 times more accurately than a 16×16 element square antenna array (assuming the same antenna spacing for the linear and square antenna arrays).

[0019] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An antenna optimization design with enhanced performance under equal area, characterized in that, The antenna beam profile is linear along the x-axis and y-axis, for the beam profile used in X-spoke generation. When the antenna spokes are rectangular and there are multiple antennas along the narrow dimension, the beam profile will look similar except that the beam width can be controlled in both the x and y dimensions.

2. The optimized antenna design with enhanced performance under equal area according to claim 1, characterized in that, In the case of using a vertical linear antenna array, when using a non-linear, rectangular antenna array, the generated beam is two-dimensional rather than one-dimensional.

3. The optimized antenna design with enhanced performance under equal area according to claim 1, characterized in that, In the simplified case where the beam profile is approximately linear, thus forming an array of x-beams and y-beams, when a signal arrives at the satellite x and y line antenna array spokes, the position of the radio wave source can be estimated by converting the phase difference observed along the antenna spokes into the angle and elevation of the propagating radio wave, and then into the position on the earth. This can be visualized using a 2D matrix. After adjusting for the non-linear beam profile, the row and column positions will be converted into positions on the earth.

4. The optimized antenna design with enhanced performance under equal area according to claim 1, characterized in that A 128-antenna-element linear array can generate approximately 64 non-overlapping beams on the ground, covering an elevation angle range of 45 degrees. A dual-spoke linear antenna array system, with 128 antennas per spoke and 64 non-overlapping beams using 64-ary FSK modulation, has a spectral efficiency approximately 700 times that of a single-antenna receiver using 64-ary FSK modulation. Among them, for the same amount of bandwidth, this means a 700-fold increase in network capacity. Compared with a single-antenna receiver using 2-FSK modulation, the spectral efficiency of the same dual-antenna spoke system using 64-ARY FSK modulation is increased by approximately 150 times. A standard square antenna array, with 128 units per spoke, the array size of the two-spoke linear array is approximately 16x16 antenna units, generating 8x8 = 64 non-overlapping beams within a 45-degree elevation angle range. And, the dual-spoke linear antenna array receiving 64-ary FSK signals has a network capacity approximately 700 / 64 = 10.9 times that of a 16x16 square antenna array receiving 64-ary FSK signals, and approximately 150 / 64 = 2.3 times that of a 16x16 square antenna array receiving 2-FSK modulation signals.

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