摘要:
An antenna system including a support structure and an antenna assembly having an open grid reflector structure in a closed ring and dipole elements. The antenna assembly includes a number of antenna panels, each including a number of the dipole elements, the closed ring is self-supporting and connected to the support structure by radial beams and struts, and the antenna panels are interconnected by a variable angle connection.
摘要:
An access method using a rotating lobe in a telecommunication system that has antennas that support a number of horizontal lobes for communication between a base station and a mobile station. Signals to and from the antennas are modulated by a lobe shaping unit to bring the lobe to rotate in a horizontal plane, that the mobile station synchronizes with the base station transmission lobe by means of an internal clock, and after achieving synchronization goes into a sleep mode. The sleep mode has a number of wake up levels, wherein the mobile station in the deepest level listens for wake up calls and in the highest level listens for the proper message.
摘要:
A parasitic element for a phased-array antenna radiator is provided. The radiator comprises a first dipole radiator including two coplanar monopole radiating elements disposed symmetrically about a radiation axis, a second dipole radiator, arranged orthogonally with respect to the first dipole radiator, including two coplanar radiating elements disposed symmetrically about the radiation axis, and a parasitic gain element, having a substantially elliptical shape, disposed above the first and second dipole radiators and centered on the radiation axis.
摘要:
A base station for a cellular communication system is provided. The base station includes a transceiver and a phased-array antenna. The phased-array antenna includes a plurality of sectors, each of which includes a plurality of vertically-arranged antenna panels, each of which includes a plurality of radiators arranged in columns. The vertical spacing between the radiators in each column is a predetermined value, and the vertical spacing between the radiators in adjacent columns is one-half of the predetermined value.
摘要:
A phased-array antenna panel for a super economical broadcast system is provided. The phased-array antenna panel system includes an antenna panel support member, a first pair of striplines and a second pair of striplines. The antenna panel support member includes a front reflector surface to support first and second columns of constantly-spaced, crossed-dipole radiators, a first pair of signal ground cavities disposed beneath the first column of crossed-dipole radiators, a second pair of signal ground cavities disposed beneath the second column of crossed-dipole radiators, and a rear surface including first and second pairs of signal distribution cable connectors. The first pair of striplines are respectively disposed within the first pair of signal ground cavities and are coupled to the first pair of signal distribution connectors and the first column of crossed-dipole radiators. The second pair of striplines are respectively disposed within the second pair of signal ground cavities and are coupled to the second pair of signal distribution connectors and the second column of crossed-dipole radiators.
摘要:
A super economical broadcast system and method are provided. The system includes a plurality of base transceiver stations that define a plurality of respective cells, each base transceiver station includes a phased-array antenna having a plurality of sectors, each sector has a plurality of vertically-arranged antenna panels, and each antenna panel has a plurality of vertically-arranged radiators disposed in at least two staggered columns. The method includes forming a horizontally and vertically shaped beam using a plurality of vertically-arranged antenna panels, in which each antenna panel has a plurality of vertically-arranged radiators disposed in at least two staggered columns, and transmitting a power distribution that has an essentially uniform field strength over a near zone, a middle zone and at least a portion of a far zone.
摘要:
A phased-array antenna radiator for a super economical cellular communication system is provided. The phased-array antenna radiator comprises two dipole radiators. The first dipole radiator includes a first monopole radiating element supported by a first outer conductor, a second monopole radiating element supported by a second outer conductor, a first inner conductor, disposed within the first outer conductor and extending therethrough, having an upper termination, a first feed strap, attached to the upper termination of the first inner conductor, and a first stub, disposed within the second outer conductor and attached to the first feed strap. The second dipole radiator includes a third monopole radiating element supported by a third outer conductor, a fourth monopole radiating element supported by a fourth outer conductor, a second inner conductor, disposed within the third outer conductor and extending therethrough, having an upper termination, a second feed strap, attached to the upper termination of the second inner conductor, and a second stub, disposed within the fourth outer conductor and attached to the second feed strap.
摘要:
A phased-array antenna panel for a super economical broadcast system is provided. The phased-array antenna panel system includes an antenna panel support member, a first pair of striplines and a second pair of striplines. The antenna panel support member includes a front reflector surface to support first and second columns of constantly-spaced, crossed-dipole radiators, a first pair of signal ground cavities disposed beneath the first column of crossed-dipole radiators, a second pair of signal ground cavities disposed beneath the second column of crossed-dipole radiators, and a rear surface including first and second pairs of signal distribution cable connectors. The first pair of striplines are respectively disposed within the first pair of signal ground cavities and are coupled to the first pair of signal distribution connectors and the first column of crossed-dipole radiators. The second pair of striplines are respectively disposed within the second pair of signal ground cavities and are coupled to the second pair of signal distribution connectors and the second column of crossed-dipole radiators.
摘要:
A phased-array antenna filter and diplexer for a super economical broadcast system are provided. The filter and diplexer includes a signal divider tee diplexer, a receive filter and a transmit filter. The diplexer includes a tee branch point, an antenna port, a transmit port and a receive port. The receive filter includes a flat, multi-pole bandpass filter, an input port and an output port, where the input port is coupled to the diplexer receive port to define a receive signal path, from the tee branch point to the receive input port, that has a length of approximately one quarter receive wavelength. The transmit filter includes a folded, multi-pole bandpass filter, an input port and an output port, where the output port is coupled to the diplexer transmit port to define a transmit signal path, from the tee branch point to the transmit output port, that has a length of approximately one quarter transmit wavelength.
摘要:
A super economical broadcast system and method are provided. The system includes a plurality of base transceiver stations that define a plurality of respective cells, each base transceiver station includes a phased-array antenna having a plurality of sectors, each sector has a plurality of vertically-arranged antenna panels, and each antenna panel has a plurality of vertically-arranged radiators disposed in at least two staggered columns. The method includes forming a horizontally and vertically shaped beam using a plurality of vertically-arranged antenna panels, in which each antenna panel has a plurality of vertically-arranged radiators disposed in at least two staggered columns, and transmitting a power distribution that has an essentially uniform field strength over a near zone, a middle zone and at least a portion of a far zone.