Abstract: A planar reconfigurable antenna that is capable of generating omnidirectional and directional radiation patterns over a wide frequency band or over multiple frequency bands includes a substrate, one or more pairs of conductive elements on at least one side of the substrate, a common RF feed point, and respective switches that selectively connects one or all of the conductive elements to the common RF feed point. An omni-directional radiation pattern is generated when all of the conductive elements are connected to the common RF feed point, while a directional radiation pattern is generated when only a pair of conductive elements on opposite sides of the substrate are connected to the common RF feed point. In the directional radiation mode, the conductive elements that are not connected to the common RF feed point act as a reflector for other conductive elements that are connected to the common RF feed point.

Abstract: The invention relates to a reconfigurable antenna system (1), which comprises a plurality of antenna units (10) and does not employ phase shifters. Each antenna unit (10) is by itself a reconfigurable antenna having at least an active radiating element which is coupled to one or more passive radiating elements. Each antenna unit is provided with one or more variable loads (12) that can be electrically connected/disconnected to each other and with said antenna unit (10), to selectively configure the radiating properties of the system. A bias network (70) is adopted to bias the variable loads (12) and a control unit (80) allows controlling the operation of said bias network (70). Each active radiating element is fed by at least a feeding line (501) that provides it with a suitable polarization. Hence, the system can advantageously resort to multiple polarizations, each of them being provided by a same source.

Abstract: The present invention refers to a reconfigurable antenna structure. The antenna structure comprises a radiating structure comprising one or more first radiating elements and a secondary radiating structure, operationally associated with said primary radiating structure. Said secondary radiating structure comprises a plurality of second radiating elements that can be selectively electrically connected/disconnected to each other to vary the configuration of said secondary radiating structure, so as to vary the radiating properties of the antenna structure. The antenna structure also comprises first reactive loads, electrically connected between said primary and secondary radiating structures, and second reactive loads, electrically connected to said secondary radiating structure.

Abstract: The present invention refers to a reconfigurable antenna structure. The antenna structure comprises an active radiating structure comprising at least an active radiating element, a passive radiating structure comprising at least a passive radiating element, a ground plane structure comprising at least a ground plane element and at least a first circuitry element to selectively electrically connect/disconnect said passive radiating element with/from said ground plane element. The ground plane structure comprises regulating means of the current distribution along said ground plane structure, when said antenna structure emits/receives an electromagnetic radiation.

Abstract: An antenna apparatus may include a reflective layer connected to a ground, one or more first antennas disposed on the reflective layer, wherein each first antenna includes a first active element and one or more first parasitic elements; one or more first switching devices, each associated with corresponding one of the one or more first parasitic elements in at least one of one or more first antennas, one or more second antennas disposed on the reflective layer, wherein each second antenna includes a second active element and one or more second parasitic elements, and one or more second switching devices, each associated with corresponding one of the one or more second parasitic elements in at least one of one or more second antennas. The first antennas operate at a first frequency. The second antennas operate at a second frequency different from the first frequency.

Abstract: Leaky wave antennas that can be reconfigured in pattern and/or polarization by exploiting the characteristic of metamaterial structures loaded with variable capacitor and inductors employ a Composite Right Left Handed (CRLH) unit cell with two independent DC biases used to actively change the group delay of the transmission line and the polarization of the radiated field while preserving good impedance matching. Different degrees of pattern and polarization reconfigurability are achieved by cascading multiple of these unit cells along a straight line, a circular line or a zigzag line while preserving high gain for all the antenna configurations and good impedance matching.

Abstract: The invention relates to a method (1) for configuring a reconfigurable antenna system (100).

Abstract: The present invention refers to a reconfigurable antenna structure. The antenna structure comprises an active radiating structure comprising at least an active radiating element, a passive radiating structure comprising at least a passive radiating element, a ground plane structure comprising at least a ground plane element and at least a first circuitry element to selectively electrically connect/disconnect said passive radiating element with/from said ground plane element. The ground plane structure comprises regulating means of the current distribution along said ground plane structure, when said antenna structure emits/receives an electromagnetic radiation.

Abstract: The present invention refers to a reconfigurable antenna structure. The antenna structure comprises a radiating structure comprising one or more first radiating elements and a secondary radiating structure, operationally associated with said primary radiating structure. Said secondary radiating structure comprises a plurality of second radiating elements that can be selectively electrically connected/disconnected to each other to vary the configuration of said secondary radiating structure, so as to vary the radiating properties of the antenna structure. The antenna structure also comprises first reactive loads, electrically connected between said primary and secondary radiating structures, and second reactive loads, electrically connected to said secondary radiating structure.