Broadband high-gain Vivaldi antenna

A high-gain, antenna technology, applied in the field of antennas, can solve problems such as poor performance, achieve stable radiation characteristics, simple structure, and correct the deviation of the electric field direction

CN109301451AInactive Publication Date: 2019-02-01NANJING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-02-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses broadband high-gain Vivaldi antenna which a dielectric substrate, a metal patch, a quadrangular metal patch, an impedance match microstrip line and a sector-shaped metal branch. The metal patch and the quadrangular metal patch are fixed in the top side of the dielectric substrate, the impedance match microstrip line and the sector-shaped metal branch are fixed in the bottomside of the dielectric substrate, the metal patch is provided with gradual-change trough line symmetric by taking the horizontal central axis as the center and provided with a horn-shaped opening, the gradual-change trough line is of index type gradual change, the bottom end of the gradual-change trough line is provided with a circular resonant cavity, the outer sidewalls of the gradual-change trough line are provided with comb shaped grids at equal interval, the quadrangular metal patch is positioned in the opening of gradual-change trough line, one end of the L-shaped impedance match microstrip line is connected to the sector-shaped metal branch, and the impedance match microstrip line and the sector-shaped metal branch serve as a feed structure. The Vivaldi antenna of the frequency range of 2.3-8.0GH is characterized by simple structure, wide frequency band and high gain.
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Description

technical field

[0001] The invention belongs to the technical field of antennas, and in particular relates to a broadband high-gain Vivaldi antenna. Background technique

[0002] The Vivaldi antenna, the exponentially tapered slot antenna, is a non-periodic, end-fired, linearly polarized, gradient traveling wave antenna proposed by P.J.Gibson in 1979. It has a better Gaussian impulse response, a wider operating frequency band, and a higher gain High, good radiation performance, small size, easy to manufacture, and suitable for integration with solid devices, whether it is used as a single antenna or as a radiation unit of a phased array antenna, it is very suitable. Therefore, Vivaldi antennas are widely used in broadband or ultra-wideband phased array radars to complete multi-target and multi-functional tasks. At the same time, phased array radars can also be used for ESM, ECM electronic countermeasures and communications, making them a shared aperture array antenna system...

Examples

Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Such as figure 1 , figure 2 As shown, a kind of broadband high-gain Vivaldi antenna provided by the present invention comprises dielectric substrate 1, metal patch 2, quadrilateral metal patch 3, impedance matching microstrip line 4 and fan-shaped metal branch 5, metal patch 2 and quadrilateral metal patch The slices 3 are fixed on the top surface of the dielectric substrate 1, the impedance matching microstrip line 4 and the fan-shaped metal branch 5 are fixed on the bottom surface of the dielectric substrate 1, and the metal patch 2 has a trumpet-shaped opening symmetrical to its horizontal central axis. The gradual change groove line 6, the gradual change groove line 6 has an exponential gradual change, and its opening width should not be less than half of the wavelength corresponding to the lowest operating frequency. A circular r...