Vivaldi antenna realizing low return loss and high gain at low frequency
A technology with return loss and high gain, which is applied to antennas, electrical components, and structural forms of radiation elements, etc., can solve the problems of difficult and poor Vivaldi antennas, achieve enhanced radiation stability, simple structure, and reduce side lobes Effect
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[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0018] Such as figure 1 CAVA, figure 2 As shown in EGSA, the EGSA provided by the present invention includes a dielectric substrate 1 , a metal radiation sheet 2 , a microstrip balun 3 , an elliptical groove line 4 , an exponentially graded groove line 5 and a corrugated exponentially graded groove (EGS) 6 . Metal radiation pieces 2 are respectively fixed on the top surface and bottom surface of the dielectric substrate 1, and the microstrip balun used for impedance matching is composed of linear tapered microstrip lines and 4 metal patches with elliptical groove lines. The metal radiating sheet 2 is provided with a trumpet-shaped opening and an exponentially changing groove line 5 symmetrical to its horizontal central axis, and the outer wall of the metal radiating sheet 2 is provided with a corrugated exponentially changing groove 6 .
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