A multiband resonator element which, on the one hand, compensates the components of an electromagnetic field radiated from its phase centre, located on the axis of symmetry of the resonator, to control the polarization purity of a radiating element. On the other hand, it enables the selection of the electromagnetic fields reflected and transmitted on a frequency- and multiband-selective surface. In this sense, this is an innovative element that enables the design of directive radiating elements and with an axial ratio for its circular polarization less than or equal to 1.5 dB for all the angles belonging to the hemisphere centred on broadside. Thus, it can be used in the design of reflectarrays, transmitarrays and any dichroic multiband surface, likewise on metamaterial surfaces.

A multiband resonator element which, on the one hand, compensates the components of an electromagnetic field radiated from its phase centre, located on the axis of symmetry of the resonator, to control the polarization purity of a radiating element. On the other hand, it enables the selection of the electromagnetic fields reflected and transmitted on a frequency- and multiband-selective surface. In this sense, this is an innovative element that enables the design of directive radiating elements and with an axial ratio for its circular polarization less than or equal to 1.5 dB for all the angles belonging to the hemisphere centred on broadside. Thus, it can be used in the design of reflectarrays, transmitarrays and any dichroic multiband surface, likewise on metamaterial surfaces.

An antenna for multi-broadband and multi-polarization communication, may include a plurality of radiators configured to jointly function as one or more dipoles, a first feed terminal for a first signal of a first polarization, and a second feed terminal for a second signal of a second polarization different from the first polarization. Each radiator may be configured to contribute to resonances at two or more nonoverlapping bands. In an embodiment, the antenna may further include a third feed terminal for a third signal of the first polarization, and a fourth feed terminal for a fourth signal of the second polarization.

An antenna for multi-broadband and multi-polarization communication, may include a plurality of radiators configured to jointly function as one or more dipoles, a first feed terminal for a first signal of a first polarization, and a second feed terminal for a second signal of a second polarization different from the first polarization. Each radiator may be configured to contribute to resonances at two or more nonoverlapping bands. In an embodiment, the antenna may further include a third feed terminal for a third signal of the first polarization, and a fourth feed terminal for a fourth signal of the second polarization.

An antenna apparatus for a mobile terminal is provided. The antenna apparatus includes an antenna pattern, a first electric circuit and a second electric circuit respectively connected between both ends of the antenna pattern and a system ground, and a third electric circuit disposed between the antenna pattern and a feeding line, wherein the first electric circuit and the second electric circuit extend electrical wavelengths of the antenna pattern and the third electric circuit increases input impedance matching.

An antenna apparatus for a mobile terminal is provided. The antenna apparatus includes an antenna pattern, a first electric circuit and a second electric circuit respectively connected between both ends of the antenna pattern and a system ground, and a third electric circuit disposed between the antenna pattern and a feeding line, wherein the first electric circuit and the second electric circuit extend electrical wavelengths of the antenna pattern and the third electric circuit increases input impedance matching.

An antenna apparatus includes: a feed line; a first ground layer including surface disposed above or below the feed line and spaced apart from the feed line; and an antenna pattern electrically connected to an end of the feed line and configured to transmit and/or receive a radio frequency (RF) signal, wherein the first ground layer includes a first protruding region protruding in a first longitudinal direction of the surface toward the antenna pattern and at least partially overlapping the feed line above or below the feed line, and second and third protruding regions protruding in the first longitudinal direction from positions spaced apart from the first protruding region in opposite lateral directions of the surface.

An antenna apparatus includes: a feed line; a first ground layer including surface disposed above or below the feed line and spaced apart from the feed line; and an antenna pattern electrically connected to an end of the feed line and configured to transmit and/or receive a radio frequency (RF) signal, wherein the first ground layer includes a first protruding region protruding in a first longitudinal direction of the surface toward the antenna pattern and at least partially overlapping the feed line above or below the feed line, and second and third protruding regions protruding in the first longitudinal direction from positions spaced apart from the first protruding region in opposite lateral directions of the surface.

An antenna array may include a plurality of printed circuit boards (PCBs) oriented in a stacked arrangement, parallel to and spaced apart from one another. Each of the PCBs may include a linear array of antenna elements, which cooperate with the linear arrays of antenna elements on other PCBs to form a two-dimensional array of antenna elements. The PCBs may be supported at one end by a common backplate in a cantilevered manner, with the linear arrays of antenna elements located near the free end of the PCBs. The PCBs may include a thicker portion and a thinner portion, and the thinner portion may include a heat sink or other thermal dissipation structure.

An antenna array may include a plurality of printed circuit boards (PCBs) oriented in a stacked arrangement, parallel to and spaced apart from one another. Each of the PCBs may include a linear array of antenna elements, which cooperate with the linear arrays of antenna elements on other PCBs to form a two-dimensional array of antenna elements. The PCBs may be supported at one end by a common backplate in a cantilevered manner, with the linear arrays of antenna elements located near the free end of the PCBs. The PCBs may include a thicker portion and a thinner portion, and the thinner portion may include a heat sink or other thermal dissipation structure.