A dual-polarization one-dimensional strongly coupled ultra-wide bandwidth angular scanning phased array

A wide-angle scanning, dual-polarization technology, applied in the field of antennas, can solve the problems of increasing antenna weight, high requirements for coupling strength between units, and high density, and achieves widening low-frequency impedance bandwidth, lightweight design, and improving low-frequency reactance. Effect

Active Publication Date: 2018-12-21
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] However, this new type of phased array technology currently has some shortcomings: (1) Due to the high requirements for the coupling strength between elements, this technology is usually applied to the antenna array
Moreover, the density of this dielectric material is usually high, which greatly increases the weight of the antenna in this case

Method used

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  • A dual-polarization one-dimensional strongly coupled ultra-wide bandwidth angular scanning phased array
  • A dual-polarization one-dimensional strongly coupled ultra-wide bandwidth angular scanning phased array
  • A dual-polarization one-dimensional strongly coupled ultra-wide bandwidth angular scanning phased array

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Embodiment 1

[0018] refer to figure 2 In the unit structure shown, a one-dimensional periodic boundary condition is used to simulate the simulation of the array element of the present invention in a one-dimensional infinite array environment. The unit includes two layers of orthogonal horizontally polarized interdigitated dipoles 2 and vertically polarized interdigitated dipoles 4, as well as horizontal extensions 5 and vertically polarized interdigitated dipoles of vertical polarization. The vertical gradient extension part 6 of the polarized interdigitated dipole; 3 is a thickness of 0.508mm, and the relative permittivity ε r= 2.2 TLY-5 dielectric layer, 2 and 4 are printed on the upper and lower surfaces of the microwave dielectric layer respectively; above 3 there is a vertical and orthogonal parasitic dielectric plate 1, the material and thickness of the dielectric layer are the same as 3, and the metal is printed on both sides ; 7 is the feed structure of the gradient microstrip li...

Embodiment 2

[0019] Embodiment 2: In this embodiment, 26 structures in Embodiment 1 are arranged one-dimensionally, and one unit on each side is connected to a 50-ohm matching load as a dummy. Its schematic diagram is as follows figure 1 shown.

[0020] Considering the conditions of existing simulation hardware facilities, this embodiment adopts the pattern superposition principle in electromagnetic simulation to simulate the pattern of the line array. The radiation pattern is shown in Figure 7. It can be seen from the array pattern that the linear array has a main beam at each scanning angle, pointing to the scanning direction accurately. The sidelobe and cross-polarization levels of the antenna are basically kept above -15dB.

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Abstract

The invention discloses a dual-polarization one-dimensional strong coupling ultra-wide bandwidth angular scanning phased array, the antenna consists of two horizontally polarized interdigitated coupled dipoles and two vertically polarized interdigitated coupled dipoles The poles constitute the array element and are arranged in a linear array along the dimension where the horizontal polarization is located. Its basic structure includes a vertically orthogonal parasitic printed medium plate (1), a horizontally polarized interdigitated dipole (2), a dielectric plate (3), and a vertically polarized Interdigitated dipole (4), horizontal extension of vertically polarized interdigitated dipole (5), vertically tapered extension of vertically polarized interdigitated dipole (6), tapered micro Strip feed structure (7), reflecting floor (8), grounded metal fence (9), power divider (10), 50 ohm coaxial adapter (11). Among them, the tight coupling structure between the units helps the antenna to achieve ultra-wideband effect; the vertical and orthogonal parasitic printed dielectric board is used to replace the bulky traditional wide-angle impedance matching layer to realize the wide-angle scanning function, and at the same time achieve the effect of lightweight design; The vertically polarized interdigitated dipole extends vertically and gradually to both sides, which not only makes up for the influence of only one-dimensional coupling effect on the antenna bandwidth, but also saves space; the gradient microstrip line feed structure plays a role in impedance transformation. Function: The capacitive effect between the grounded metal fence and the vertical gradient extension of the vertically polarized interdigitated dipole cancels out the antenna inductance, improving the low-frequency return loss.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a dual-polarization ultra-wideband phased array antenna, specifically a dual-polarization ultra-wideband angular scanning one-dimensional linear array phased array antenna for modern communication systems and radar systems. Background technique [0002] The phased array antenna with broadband and wide-angle scanning characteristics is a commonly used antenna form in modern radar and electronic warfare systems. With the rapid development of modern military electronic technology, the performance requirements of various military electronic systems for the wide bandwidth and wide scanning angle of the phased array continue to increase. The traditional broadband phased array design is to first design a single isolated unit with a wider bandwidth than the phased array, and then organize the designed broadband antenna units into an array. When forming an array, it is desirable to increa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q3/34H01Q21/06H01Q1/50
CPCH01Q1/50H01Q3/34H01Q21/06
Inventor 杨仕文张航宇陈益凯聂在平屈世伟
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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