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Half-mode Vivaldi antenna and miniaturized large-angle frequency scanning antenna array

A technology for antennas and microstrip feeders, which is applied in antenna arrays, antenna arrays that are energized separately, antennas, etc., can solve the problems of small angular scanning range, fast scanning speed, and high profile, and achieve small size, large beam scanning range, and low cost. low effect

Active Publication Date: 2020-01-31
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the mechanical scanning antenna and the electronic scanning antenna in the prior art have the following defects respectively: 1) the mechanical scanning antenna realizes beam scanning through mechanical rotation, and the scanning speed in this way is slow; 2) the electronic scanning antenna is electronically controlled Make the antenna realize beam scanning without mechanical movement, this method has fast scanning speed and high precision
The more widely used frequency-swept antennas are rectangular waveguide narrow-side slotted traveling-wave array antennas and leaky-wave antennas. Their size and weight are relatively large, their profile is high, and their angular scanning range is small, which greatly limits their application range.

Method used

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  • Half-mode Vivaldi antenna and miniaturized large-angle frequency scanning antenna array
  • Half-mode Vivaldi antenna and miniaturized large-angle frequency scanning antenna array
  • Half-mode Vivaldi antenna and miniaturized large-angle frequency scanning antenna array

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as Figure 1-9 As shown, a half-mode Vivaldi antenna includes a radiating unit layer 100 and a feeding network layer 200 arranged opposite to each other up and down; the radiating unit layer 100 is an HM-Vivaldi antenna, and the feeding network layer 200 is a series feeding network. The radiating unit layer 100 and the feeding network layer 200 are connected in series through a microstrip hole coupling structure.

[0040] Specifically, the microstrip hole coupling structure is composed of the microstrip transmission line 210 of the feed network layer 200 and the microstrip feeder 160 of the radiation unit layer 100; the second metallized via hole 220 is set on the microstrip transmission line 210; The first metallized via hole 162 is opened on it; the electromagnetic signal is fed through one end of the microstrip transmission line 210 , and coupled to the microstrip feeder line 160 through the second metallized via hole 220 and the first metallized via hole 162 in...

Embodiment 2

[0052] On the basis of Embodiment 1, this embodiment further optimizes the structure of the edge shape of the radiation arm 120 and the edge shape of the metal ground 140, as follows:

[0053] In this embodiment, the edge shape of the radiation arm 120 increases the surface current intensity of the wave-shaped structure 121 and increases the gain of the antenna.

[0054] In this embodiment, the edge shape of the metal ground 140 is a segmented curve structure 141 . The width of the end of the tapered radiation slot 130 determines the lowest cutoff frequency of the antenna, and the degree of curvature of the tapered radiation slot 130 and the axial ratio of the elliptical slot on the metal ground 140 can improve the impedance matching of the antenna.

Embodiment 3

[0056] figure 2 The middle black part is the third metallized via hole 153 . On the basis of Embodiment 2, the first metallized via hole 162 on the microstrip feeder 160 is aligned with the second metallized via hole 220 on the series feed network.

[0057] Figure 10 The S-parameter simulation results of the antenna array are shown. It can be seen from the figure that the antenna operating frequency is 6-15GHz, and the impedance bandwidth of S11≤-10dB reaches 85.7%.

[0058] Figure 11 The radiation pattern simulation results of the antenna array operating at 10.6GHz are shown. It can be seen from the figure that at the frequency point of 10.6GHz, the antenna has a gain of 14.0dBi, the side lobe level ratio is -11.0dB, and the front-to-back ratio is 14.7dB.

[0059] Figure 12 It shows the variation diagram of the antenna array pattern with frequency. It can be seen from the figure that the gain is 10.6dBi at 6GHz, the scanning angle is 88°, the gain is 12.8dBi at 7GHz,...

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Abstract

The invention provides a half-mode Vivaldi antenna. The half-mode Vivaldi antenna comprises a radiation unit layer and a feed network layer which are oppositely arranged in a vertical direction; the radiation unit layer and the feed network layer are in signal connection through a microstrip hole coupling structure; the micro-strip hole coupling structure is composed of a micro-strip transmissionline of the feed network layer and a micro-strip feeder line of the radiation unit layer; a second metallized via hole is formed in the microstrip transmission line; and a first metallized via hole isformed in the microstrip feeder line. The invention further provides a miniaturized large-angle frequency scanning antenna array.

Description

technical field [0001] The invention belongs to the technical field of beam scanning antennas in the field of microwave technology, and in particular relates to a half-mode Vivaldi antenna and a miniaturized large-angle frequency-scanning antenna array. Background technique [0002] With the continuous development of wireless detection technology, the beam scanning antenna with controllable beam pointing has been widely used in the fields of radar and communication. According to different scanning methods, it is divided into mechanical scanning antenna and electronic scanning antenna. [0003] However, the mechanical scanning antenna and the electronic scanning antenna in the prior art have the following defects respectively: 1) the mechanical scanning antenna realizes beam scanning through mechanical rotation, and the scanning speed in this way is slow; 2) the electronic scanning antenna is electronically controlled The antenna realizes beam scanning without mechanical mov...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q3/22H01Q13/10H01Q21/08H01Q21/29
CPCH01Q1/38H01Q1/48H01Q1/50H01Q3/22H01Q13/10H01Q21/08H01Q21/293
Inventor 杨雪霞殷章飞
Owner SHANGHAI UNIV
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