Abstract: A conical antenna includes a chassis, a main radiator and a ring resonator. A central of the chassis defines a via for feeding electromagnetic signals. The main radiator includes a first radiating portion with a conical shape, a second radiating portion with a cylindrical shape and a third radiating portion with a frustum cone shape, for transmitting and receiving electromagnetic signals. The ring resonator is disposed on the chassis. A sidewall of the first radiating portion connects with a sidewall of the via in the chassis through the ring resonator. The main radiator and the ring resonator collectively resonate to generate a resonance frequency useful in mobile communications devices.

Abstract: An antenna includes a dielectric substrate, two pairs of antenna elements engaged on opposite sides of the dielectric substrate, two feed portions and a first connection element. Each antenna elements includes a first antenna electrode and a second antenna electrode connected to the first antenna electrode. A portion of the first antenna electrode is engaged on an upper surface of the dielectric substrate. A portion of the second antenna electrode is engaged on a lower surface of the dielectric substrate. Each of the two feed portions is connected between the ground and a conducive pad formed on the dielectric substrate. The first connection element is connected between the two antenna electrodes. A length of the first connection element is one-fourth wavelength of the first antenna electrode.