1029results about "Collapsable antennas means" patented technology

An antenna structure used in a folding portable radio terminal, hasa first antenna; anda second antenna,wherein the first antenna is used at least when the portable radio terminal is not folded, andthe second antenna is used at least when the portable radio terminal is folded.

A bracket (12) is fixed to the rear surface of a reflector (2). The bracket has a planar plate (14) which, when the bracket is fixed to the reflector, is perpendicular to a polarity axis (16). Plural, spaced-apart arcuate slots (20) arranged on an imaginary circle on the planar plate (14) about the polarity axis (16) are formed in the planar plate (14). An adapter plate (24) is disposed in contact with the surface of the planar plate (14) facing the reflector (2). The bracket (12) is rotatable about the polarity axis (16) relative to the adapter plate (24). The adapter plate (24) has screw holes (26) in alignment with the arcuate slots (20) in the planar plate (14). A bracket (28) is disposed on the side of the planar plate (14) opposite to the reflector (2). The bracket (28) has a pair of wings (30, 32). A connecting member (34) is formed integral with the wings (30, 32). The connecting member (34) is perpendicular to the wings (30, 32). The bracket (28) is rotatable about an elevation adjustment axis passing between the wings (30, 32). The bracket (28) has tabs (36, 38, 40). The tabs (36, 38, 40) are adapted to contact the planar plate (14) and provided with respective holes (42, 44, 46). Bolts (48) are inserted through the respective holes (42, 44, 46) and the respective arcuate slots (20) and screwed into the screw holes (26) in the adapter plate (24), whereby the brackets (12, 28) are secured to the adapter plate (24).

A bracket (12) is fixed to the rear surface of a reflector (2). The bracket has a planar plate (14) which, when the bracket is fixed to the reflector, is perpendicular to a polarity axis (16). Plural, spaced-apart arcuate slots (20) arranged on an imaginary circle on the planar plate (14) about the polarity axis (16) are formed in the planar plate (14). An adapter plate (24) is disposed in contact with the surface of the planar plate (14) facing the reflector (2). The bracket (12) is rotatable about the polarity axis (16) relative to the adapter plate (24). The adapter plate (24) has screw holes (26) in alignment with the arcuate slots (20) in the planar plate (14). A bracket (28) is disposed on the side of the planar plate (14) opposite to the reflector (2). The bracket (28) has a pair of wings (30, 32). A connecting member (34) is formed integral with the wings (30, 32). The connecting member (34) is perpendicular to the wings (30, 32). The bracket (28) is rotatable about an elevation adjustment axis passing between the wings (30, 32). The bracket (28) has tabs (36, 38, 40). The tabs (36, 38, 40) are adapted to contact the planar plate (14) and provided with respective holes (42, 44, 46). Bolts (48) are inserted through the respective holes (42, 44, 46) and the respective arcuate slots (20) and screwed into the screw holes (26) in the adapter plate (24), whereby the brackets (12, 28) are secured to the adapter plate (24).

An antenna directivity enhancer to enhance the directivity of an antenna is disclosed. The enhancer has a 3-dimensional structure in a predefined 3-dimensional shape when operating to enhance the directivity of an antenna. The 3-dimensional structure can be flexibly collapsible into 2-dimensional flat surfaces, with at least two of the surfaces not required to have any space between them when the structure is collapsed. The direction where the directivity is enhanced can be changed as desired. The enhancer can include just one reflecting surface, or at least two reflecting surfaces. In yet another embodiment, the enhancer includes a curved surface when the enhancer is in its predefined 3-dimensional shape.

A deployable truss is formed from a plurality of column members connected at their ends where at least some of the column members are formed from column assemblies, each including a plurality of strut members that are at least connected to each other at a first and second end of the column assembly. For added rigidity, strut members of a column assembly may be connected to each other between the first and second ends using, for example, a rigidizable resin, a fixed spacer, or a deployable spacer. Connecting strut members between the ends of the column assembly provides mutual bracing to the strut members and decreases the free buckling length of the individual strut members. Spacers are preferably configured to radially space the strut members away from the longitudinal centerline of the column assembly to increase its moment of inertia, and hence its buckling strength.

A telescoping mast apparatus has a plurality of nesting cylinders. The telescoping mast apparatus has a plurality of telescoping cylinders and a plurality of straps. The plurality of cylinders is extendable from a base. Each strap extends from near a bottom of an outer cylinder, around an upper roller near a top of the outer cylinder, and is attached near a bottom of an inner cylinder. The plurality of straps and the plurality of telescoping cylinders intercouples in series with alternating straps and cylinders. The plurality of cylinders is extended by retracting a first strap from the outer cylinder, which raises an intermediate cylinder, which retracts the intermediate strap from the intermediate cylinder, which raises the second intermediate cylinder.

An orientation adjusting apparatus includes a support base plate set rotatable relative to a mast about a first vertical axis. An azimuth bracket is rotatable relative to the top plate of support base plate set about a second vertical axis. An elevation bracket is rotatable relative to an elevation fine tune bracket about a first horizontal axis. The elevation fine tune bracket is rotatable relative to the azimuth bracket about a second horizontal axis. An azimuth angle fine tuning unit is operable to rotate the azimuth bracket relative to the top plate of support base plate set about the second vertical axis. An elevation angle fine tuning unit is operable to rotate the elevation fine tune bracket relative to the azimuth bracket about the second horizontal axis.