Electromagnetic wave detection apparatus
AssigneeHitachi, Ltd.
InventorsAya Ohmae, Takashi Suga, Umberto Paoletti
Life of this patent
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Abstract
The purpose of the present invention is to provide a small electromagnetic wave detection apparatus. This electromagnetic wave detection apparatus has: a planar Luneburg lens, which is covered with metal plates facing each other, and which changes the output direction of electromagnetic waves corresponding to the input direction of the electromagnetic waves; and an electric field sensor electrically connected to the metal plates. The electric field sensor detects the electromagnetic waves outputted from the Luneburg lens, and outputs a detection signal having an intensity corresponding to the direction in which the electromagnetic waves have traveled thereto, and the level of the energy of the electromagnetic waves thus detected.
Claims11
An electromagnetic wave detection apparatus comprising:
- a planar Luneburg lens which is covered with metal plates facing each other and changes emission direction of electromagnetic wave according to incidence direction of the electromagnetic wave;
- an electric field sensor electrically connected to the metal plate;
- and
- a signal detection circuit connected to the electric field sensor,
- wherein the electric field sensor detects electromagnetic wave emitted from the Luneburg lens, and outputs direction of arrival of the electromagnetic wave, and an intensity detection signal corresponding to amount of energy of the detected electromagnetic wave, and
- wherein the electric field sensor is configured such that:
- a plurality of metal pieces are provided on a surface layer of a plate-shaped dielectric,
- each adjacent pair of the plurality of metal pieces are connected to each other by a resistor and a capacitor,
- a ground via is provided at central portion of each of the metal pieces to face the surface layer and to be connected to a ground layer provided in the dielectric, and
- a detection via connected to the signal detection circuit is connected between both ends of the resistor.
Dependencies are inferred from the claim text.