A dual band antenna that allows the independent optimization of each frequency band by adjusting the sizes of the antenna elements. For example, an antenna may have two different drivers, one for the high-frequency and one for the low frequency. By using elements orthogonally connected to the low frequency driver, the low frequency driver can function as both a reflector to the high frequency drivers and the low frequency driver without affecting the antenna's performance in the high frequency. The antenna may also have parasitic elements. For example, parasitic directors parallel to the high frequency band driver can be configured to improve performance in the high frequency band. Pairs of additional parasitic directors can be orthogonally connected these directors. These pairs can be adjusted in size to improve performance in the low frequency band with minimal impact on performance in the high frequency band.

A portable RFID reader device includes a cross Yagi antenna having good signal reading characteristics regardless of the position of an RFID tag. In embodiments, a portable RFID reader device may include a reader body implemented as a portable type having a handle, and communicating with an RFID tag in a non-contact manner, and a cross Yagi antenna assembly connected to the reader body, and including a cross Yagi antenna transmitting and receiving an RF signal required for communication to and from the RFID tag in a non-contact manner. The cross Yagi antenna may include a plate-shaped first Yagi antenna disposed at an angle of −45 degrees with respect to a horizontal plane, and a second Yagi antenna disposed at an angle of 45 degrees with respect to the horizontal plane and arranged orthogonally and cross-coupled to the first Yagi antenna.

A portable RFID reader device includes a cross Yagi antenna having good signal reading characteristics regardless of the position of an RFID tag. In embodiments, a portable RFID reader device may include a reader body implemented as a portable type having a handle, and communicating with an RFID tag in a non-contact manner, and a cross Yagi antenna assembly connected to the reader body, and including a cross Yagi antenna transmitting and receiving an RF signal required for communication to and from the RFID tag in a non-contact manner. The cross Yagi antenna may include a plate-shaped first Yagi antenna disposed at an angle of −45 degrees with respect to a horizontal plane, and a second Yagi antenna disposed at an angle of 45 degrees with respect to the horizontal plane and arranged orthogonally and cross-coupled to the first Yagi antenna.

The present disclosure relates to antennas. One example antenna includes a reflective device, at least two radiating arrays whose operating bands are in a first preset frequency band, and a plurality of parasitic radiators. Each radiating array of the at least two radiating arrays includes a plurality of radiating elements. Each radiating array of the at least two radiating arrays is electrically disposed on the reflective device along a length direction of the reflective device, and the plurality of parasitic radiators are disposed between two adjacent radiating arrays in the at least two radiating arrays.

A dual band antenna that allows the independent optimization of each frequency band by adjusting the sizes of the antenna elements. For example, an antenna may have two different drivers, one for the high-frequency and one for the low frequency. By using elements orthogonally connected to the low frequency driver, the low frequency driver can function as both a reflector to the high frequency drivers and the low frequency driver without affecting the antenna's performance in the high frequency. The antenna may also have parasitic elements. For example, parasitic directors parallel to the high frequency band driver can be configured to improve performance in the high frequency band. Pairs of additional parasitic directors can be orthogonally connected these directors. These pairs can be adjusted in size to improve performance in the low frequency band with minimal impact on performance in the high frequency band.

A wide band directional antenna includes three elements which are partially aligned, electrically isolated from each other, of which a lower element includes at least one reflector circuit, a middle element comprises at least one dipole circuit connected to a transmission line, and an upper element includes a director circuit, wherein the dipole circuit includes at least one first pair of conductive elements, suitable for forming a minor dipole connected to the transmission line, and at least one second pair of electrically isolated conductive elements, excited with capacitive effect by the minor dipole, in such a way as to form a major dipole.

A wide band directional antenna includes three elements which are partially aligned, electrically isolated from each other, of which a lower element includes at least one reflector circuit, a middle element comprises at least one dipole circuit connected to a transmission line, and an upper element includes a director circuit, wherein the dipole circuit includes at least one first pair of conductive elements, suitable for forming a minor dipole connected to the transmission line, and at least one second pair of electrically isolated conductive elements, excited with capacitive effect by the minor dipole, in such a way as to form a major dipole.

A dual band radio frequency signal acquisition and source location system, provided with a steerable phased array antenna operable in a first and a second radio frequency band. A digital signal processor electrically connected to the steerable phased array antenna is configured to control steering of an antenna beam of the steerable phased array antenna and apply frequency time division multiplexing to radio frequency signaling in the first and the second radio frequency bands. In particular, the first frequency band may be 2.4 GHz Bluetooth/Bluetooth Low Energy, and the second frequency band may be 900 MHz passive UHF RFID.

A dual band radio frequency signal acquisition and source location system, provided with a steerable phased array antenna operable in a first and a second radio frequency band. A digital signal processor electrically connected to the steerable phased array antenna is configured to control steering of an antenna beam of the steerable phased array antenna and apply frequency time division multiplexing to radio frequency signaling in the first and the second radio frequency bands. In particular, the first frequency band may be 2.4 GHz Bluetooth/Bluetooth Low Energy, and the second frequency band may be 900 MHz passive UHF RFID.

An antenna assembly for receiving television signals on both very high frequency (VHF) bands and ultra high frequency (UHF) bands, the antenna assembly including: a main section including an elongated boom, at least one active element coupled to the boom, and at least one passive element coupled to the boom; a VHF section including a VHF boom configured to be coupled to a first longitudinal end of the boom and at least one active element coupled to the VHF boom; and a UHF section including a UHF boom configured to be coupled to a second longitudinal end of the boom opposite the first longitudinal end and a plurality of passive elements coupled to the UHF boom.