an antenna housing; and

an antenna element which is accommodated in the antenna housing,

wherein the antenna element includes a conductive plate positioned to cause capacitance between the conductive plate and a ground conductor and a plurality of reactance elements, each reactance element having one end coupled to the conductive plate,

wherein the antenna element resonates in a very high frequency (VHF) band,

wherein the plurality of reactance elements includes a first reactance element and a second reactance element,

wherein another end of the first reactance element is coupled to a feeding point and another end of the second reactance element is coupled to the ground conductor, and

wherein the conductive plate, the first reactance element, and the second reactance element operate as a series resonance circuit.