Abstract:
A multi-band antenna adapted to a portable electrical device capable of operating in various wireless communication bands includes a first radiating conductor having opposite elongated sides, a second radiating conductor extending from one end of the first radiating conductor, a third radiating conductor arranging about a central area of the first radiating. Both the second radiating conductor and the third radiating conductor extend from the same elongated side of the first radiating conductor. A feeding body is curved and extended from the third radiating conductor. According to a position that the feeding body connecting to the third radiating conductor and designed the feeding body, operation of the multi-band antenna has a preferred range of a low frequency bandwidth and a high frequency harmonic bandwidth.
Abstract:
A dual-band antenna has a ground portion, a connection portion with a feeding point separated from the ground portion and a short portion connected to the ground portion and the connection portion. The short portion and the ground portion are formed an acute angle therebetween. The connection portion respectively connect a first radiating portion and a second radiating portion. The first radiating portion and the second radiating portion are parallel to said ground portion. The short portion is arranged between the ground portion and the first radiating portion. When the dual-band antenna operates at wireless operation, the connection portion, the first radiating portion and the second radiating portion resonate to obtain a first frequency range and a second frequency range. The short portion is formed as a function of an inductance.
Abstract:
The present invention discloses a multi-band antenna, the multi-band antenna has an antenna base, a power feed portion and a grounding point. The antenna base includes a first rectangular portion, a second rectangular portion and a third rectangular portion. A first connection portion connects the first rectangular portion with the second rectangular portion, a second connection portion connects the first extending portion with the second extending portion. The power feed portion is arranged below the antenna base, and the power feed portion connects to the first rectangular portion and the second rectangular portion. The grounding point is arranged below the first rectangular portion and near the power feed portion. The first and second connection portions control the size of the electric current through the antenna base. By the above-mention unique design, the multi-band antenna can receive and transmit the signals of the different frequency bands and has a smaller volume.
Abstract:
A repositionable supporting apparatus includes a lower post adapted to be fixed on a worktable. An upper post is disposed co-axially rotatable relative to the lower post, and has a downward abutment wall defining an upper cavity, and an anchored end portion connected to an anchoring end of a cantilever member. The cantilever member has a holding end opposite to the anchoring end in a direction radial to the upper post for carrying a workpiece feeding device. A coupling member couples the lower post with the upper post in both retained and released positions where the upper post is prevented from rotation and is rotatable relative to the lower post respectively, and has an upward abutment wall to slidably contact the downward abutment wall such that a lower cavity therein can be aligned and communicated with the upper cavity. A spring biased tumbler pin is disposed in and is movable relative to the lower cavity between a locked position where the tumbler pin protrudes into tne upper cavity, and an unlocked position where the tumbler pin is retracted by depression of a depressing member to be flush with the upward abutment wall so as to permit sliding movement of the downward abutment wall, thereby moving the workpiece feeding device away from a cutting tool on the worktable so as not to interfere with replacement of the cutting tool.
Abstract:
A dual-band antenna has a first meandering portion, a second meandering portion and a connection portion defining two ends. The first meandering portion and the second meandering portion have different length. One end of the first meandering portion connects one end of the second meandering portion. The other end of the first meandering portion connects one end of the connection portion. The other end of the second meandering portion connects a feeding portion. The other end of the connection portion connects a ground portion. The feeding portion, the second meandering portion, the first meandering portion and the connection portion obtain an electrical resonance corresponding to a first frequency range. The second meandering portion obtains an electrical resonance corresponding to a second frequency range.
Abstract:
A workpiece-advancing device includes: a slider mounted on a worktable; a workpiece-driving unit mounted on the slider and including a pair of driving rollers and a belt trained on the driving rollers and having a portion adapted to abut against a workpiece and movable relative to the slider for driving movement of the workpiece on the worktable; and a positioning mechanism including an urging unit, a supporting arm unit mounted on the slider and passing through a lateral side of the slider, and an abutting unit mounted on the supporting arm unit and urged by the urging unit so as to be adapted to abut against the workpiece and so as to prevent the workpiece from deviating from a predetermined cutting path.
Abstract:
A wide band antenna mounted to a dielectric element has a first patch, a second patch spaced from the first patch and a ground patch. The first patch has a first portion with a feeding point thereat and a second portion connecting the first portion. The second patch has a third portion and a fourth portion connecting the third portion. The first portion and the second portion of the first patch space from and parallel the third portion and the fourth portion of the second patch respectively. The ground patch is close to the first portion of the first patch and the third portion of the second patch. The first patch obtains a first frequency range. The second patch responses electromagnetic energy from the first patch to obtain a second frequency range. Scope of the first and the second frequency ranges covers portion of ultra wide band communication frequency.
Abstract:
An integrated multi-band antenna has a first radiating conductor, a second radiating conductor spaced from the first radiating conductor, a trap element connected to the first and second radiating conductors, a third radiating conductor with a first feeding point connected to the first radiating conductor, a fourth radiating conductor connected to the second and third radiating conductors, a meandering radiating conductor having two ends which respectively connect a fifth radiating conductor with a second radiating conductor and a sixth radiating conductor parallel to the meandering radiating conductor and a ground portion arranged close to the first radiating conductor and spaced from the fifth radiating conductor. The second, third and fourth radiating conductors resonate at a first frequency bandwidth. The first, second and third radiating conductor and the trap element resonate a second frequency bandwidth. The fifth, sixth and meandering radiating conductors resonate a third and a fourth frequency bandwidths.
Abstract:
An antenna unit has a first antenna operating at wireless telecommunication bands and a second antenna operating at wireless local area network bands. The first antenna has a first radiating conductor with a first feeding point defining opposite sides, a second, a third and a fourth radiating conductors extending from both sides of the first radiating conductor. A parasitic element defines opposite ends. One end of the parasitic element confronts the free end of the third radiating conductor. A trap circuit connects the fourth radiating conductor and the parasitic element. A second antenna has a third side, a fourth side and a stair-shape side. The connection of the sides of the second antenna forms a first protrusion with a second feeding point and a second protrusion confronting the first antenna. A slot is opened on the second antenna. A ground portion is spaced from the first radiating conductor and the first protrusion.
Abstract:
A multi-band antenna operates at a low frequency and a wider high frequency bands, which is formed as an elongated shape defining opposite ends. The multi-band antenna has a slot opened at a long edge and being extending to one end thereon. The wide range of the opening of the slot is larger than the extension length of the slot. A feeding conductor with a feeding point is arranged to adjoin the opening of the slot. The multi-band antenna resonates the low frequency band and a first high frequency. The slot obtains a second high frequency band higher than and partially overlapped the first high frequency. So the multi-band antenna has the low frequency bands and the better high frequency which includes several high frequency bands.