Patent ID: 8991716
Filing Date: 2015-03-31
Classification: G06K,H01Q

Abstract:
1. An antenna comprising: a conductor plate having a notch, the conductor plate being divided into a first region and a second region by the notch and having a power feed point at one end of the notch; and a capacitor that bridges the first region and the second region, wherein the notch is a ribbon-shaped notch, and a capacitance of the capacitor is set so as to be not less than 0.5×Co but not greater than 1.5×Co, where Co [F] is C obtained by substituting d=W into the following Equation (A): wherein f [Hz] is a resonant frequency of the antenna, λ [m] is a resonant wavelength of the antenna found from λ=c/f where c is the speed of light, h [m] is a total length of the notch, and W [m] is a mean width of the notch.