Patent ID: 9172142
Filing Date: 2015-10-27
Classification: H01Q

Abstract:
1. A horizontal radiation antenna comprising: a substrate including an insulating material; a back-surface-side grounded conductor plate on a back surface side of the substrate and connected to ground; a front-surface-side grounded conductor plate on a front surface side of the substrate and connected to ground; an elongated and thin radiation element on the front surface side of the substrate and facing the back-surface-side grounded conductor plate and spaced therefrom; a feeding line including a conductor pattern on the front surface side of the substrate and connected to the radiation element; and at least one passive element closer to an end portion side of the substrate than the radiation element, extending in parallel with the radiation element, and insulated from the back-surface-side grounded conductor plate, the front-surface-side grounded conductor plate, and the radiation element, wherein the front-surface-side grounded conductor plate is disposed at a substantially same height as the radiation element with respect to a thickness direction of the substrate, a conductive wall surface capable of reflecting a high-frequency signal radiated from the radiation element is provided between the front-surface-side grounded conductor plate and the back-surface-side grounded conductor plate, the front-surface-side grounded conductor plate has a substantially U-shaped frame portion surrounding a notch portion positioned on the end portion side of the substrate, and the radiation element and the passive element are entirely disposed within the notch portion.