Broadband high-efficiency antenna unit, series-parallel feed subarray and phased array

An antenna unit and high-efficiency technology, which is applied in the direction of antenna arrays, individually powered antenna arrays, antennas, etc., can solve problems such as the inability to achieve low-energy signal coverage, the inability to guarantee normal signal transmission, and narrow array beam widths. And the effect of small weight, low loss, and improved isolation

Active Publication Date: 2021-09-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the millimeter wave frequency band, the transmission loss of electromagnetic waves in space will increase significantly. Using a single or a small number of antenna units, the gain is low, and the normal transmission of signals cannot be guaranteed. The antenna array has high gain and can achieve long-distance signal transmission; but the array exists Narrow beam width and low radiation efficiency make it impossible to achieve low energy consumption and wide-angle signal coverage

Method used

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  • Broadband high-efficiency antenna unit, series-parallel feed subarray and phased array
  • Broadband high-efficiency antenna unit, series-parallel feed subarray and phased array
  • Broadband high-efficiency antenna unit, series-parallel feed subarray and phased array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 As shown, a broadband high-efficiency antenna unit adopts multi-layer PCB technology, and the entire antenna uses Roger5880 as the dielectric substrate. It includes the first dielectric substrate 2, the first metal floor 3, the second dielectric substrate 5, the third dielectric substrate 8, and the second metal floor 9 that are arranged sequentially from top to bottom. The upper surface of the first dielectric substrate is set In the metasurface structure 1 , the feeding slit 4 is etched on the first metal floor 3 , and the strip-shaped feeding line 7 is arranged between the third dielectric substrate 8 and the second dielectric substrate 5 .

[0042] As the radiation part of the antenna: the metasurface structure 1 is composed of M×N metasurface units arranged centrally symmetrically and periodically, and the metasurface structure in Embodiment 1 is composed of 2×2 metasurface units arranged centrally symmetrically and periodically. The metasurface u...

Embodiment 2

[0049] As shown in Figure 3(a), Figure 3(b) and Figure 3(c), a series-parallel feed sub-array includes two mirror-symmetrical series sub-arrays, and the two series-connected sub-arrays are spliced ​​according to the mirror symmetry axis , the series sub-array D is formed by a number of broadband high-efficiency antenna elements as described in Embodiment 1 arranged in series along the direction of the sub-array.

[0050] As shown in Figure 2(a), Figure 2(b) and Figure 2(c), the series sub-array D is composed of two broadband high-efficiency antenna elements extending in the direction of the sub-array, and the two feeding slots are symmetrical.

[0051]Each broadband high-efficiency antenna unit is also provided with a fourth dielectric substrate 11 and a third metal floor 12 in sequence under the second metal floor 9, and the first coupling slot 10 is etched at the center of the second metal plate 9, and the third metal floor 12 The second coupling slot 13 is etched, and the s...

Embodiment 3

[0057] Such as Figure 4 As shown, a phased array consists of several series-parallel feed sub-arrays arranged periodically along the vertical direction of the sub-array. In Example 3, it is composed of 1×4 series-parallel feed sub-arrays, and the series-parallel feed Metal phase perturbation stubs 15 are loaded around the first and last ends of the ribbon feeder 7 of the sub-array to improve the isolation between adjacent series-parallel feeder sub-arrays.

[0058] The metal phase perturbation stubs are arranged on the same layer or at a different layer from the strip feeder to improve the isolation of adjacent series-parallel feeder sub-arrays, and the metal phase perturbation stubs of the phased array are symmetrical according to the mirror symmetry axis.

[0059] The scanning range of the phased array is determined by the distance between adjacent serial-parallel feed sub-arrays, the smaller the distance, the larger the scanning range. Generally less than half a wavelengt...

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Abstract

The invention discloses a broadband high-efficiency antenna unit, a series-parallel feed subarray and a phased array, and the antenna unit comprises a first dielectric substrate, a first metal floor, a second dielectric substrate, a third dielectric substrate and a second metal floor, wherein the first dielectric substrate, the first metal floor, the second dielectric substrate, the third dielectric substrate and the second metal floor are sequentially arranged, and the upper surface of the first dielectric substrate is provided with a metasurface structure. A feed gap is etched on the first metal floor, and a strip-shaped feeder line is arranged between the first metal floor and the second dielectric substrate. The series-parallel feed subarray comprises two series subarrays in mirror symmetry, and the two series subarrays are spliced according to a mirror symmetry axis. The phased array comprises a plurality of series-parallel feed subarrays which are periodically arranged in the vertical direction of the subarrays. The antenna unit is easy to process, low in cost, low in profile, suitable for planar antenna array design and applied to large-scale production.

Description

technical field [0001] The invention relates to the communication field, in particular to a broadband high-efficiency antenna unit, a serial-parallel feed subarray and a phased array. Background technique [0002] Phased array antennas are widely used in military and communication fields. In early radar systems, the beam direction of the array antenna was fixed, and the beam direction needed to be controlled by mechanical scanning. Compared with the traditional fixed beam array, the phased array antenna can quickly and accurately The ground control beam performs inertialess scanning, and realizes the function of searching and tracking multiple targets at the same time in a designated space. Phased array antennas were originally used in military radars for the purpose of observing and tracking aircraft targets in a wide range of space. With the development of wireless communication technology, phased array technology has also begun to be used in civilian products, such as au...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q3/30H01Q15/00H01Q21/00H01Q21/06
CPCH01Q1/38H01Q1/48H01Q1/50H01Q15/0086H01Q21/061H01Q21/0075H01Q3/30
Inventor 杨琬琛肖峰车文荃薛泉刘宇济
Owner SOUTH CHINA UNIV OF TECH
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