Substrate integrated waveguide sinusoidally modulated leaky wave antenna

Abstract

The invention discloses a substrate integrated waveguide sinusoidally modulated leaky wave antenna, which aims at providing a simple power feeding, and u -1 order harmonic wave radiation utilizing leaky wave antenna. The invention is realized by the following technical scheme: A metal radiation patch array is arrange at that center of the upper surface of the antenna dielectric plate, a cop clad sheet sandwiched on the interface surface of the waveguide dielectric plate and the antenna dielectric plate is formed with a rectangular slot array corresponding to the metal radiation patch array, and the rectangular slot array couples electromagnetic energy from the waveguide to the metal radiation patch array above the antenna dielectric plate to realize linear polarization radiation; A lineararray metallize shielding via through that waveguide dielectric plate is for on both sides of the rectangular slot array from top to bottom, and a metal coupling probe through the waveguide dielectricplate is arranged on the inn sides of the contracted linear array at both ends of the linear array metallized shielding via; A sinusoidally modulated leaky wave antenna with field intensity on the plane of antenna dielectric plate is realized by exciting the substrate integrated waveguide with metal-coupled probes and U-shaped slots on the copper clad substrate.

Description

technical field [0001] The invention relates to a sinusoidal modulation leaky-wave antenna based on a substrate integrated waveguide, which can be widely used in the fields of aircraft surface conformal antennas, high-resolution radars, mobile communication and the like. Background technique [0002] A leaky wave antenna is an antenna that radiates into space by generating energy leakage in the longitudinal direction of the waveguide structure. The original leaky wave antenna is composed of a slotted rectangular waveguide, which mainly uses the guided wave inside the waveguide to excite and establishes the leaky wave outside the waveguide, which is realized by perturbing the closed waveguide. It introduces a certain mechanism to make energy radiate continuously along the waveguide in the way people need. Its essence is the phenomenon that part of the electromagnetic wave is radiated to space when the electromagnetic wave propagating in the waveguide is a fast wave. Structur...

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Problems solved by technology

Although this antenna has good radiation characteristics, it is necessary to establish the corresponding relationship between the surface impedance and the grid gap, which is relatively complicated to calculate.

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