77results about "Collapsible/retractable loop antennas" patented technology

In a portable radio communication apparatus including a housing, at least one part of at least one of the housing is formed as a housing electrical conductor portion by an electrically conductive material. The housing electrical conductor portion is connected with a radio communication circuit of the portable radio communication apparatus so as to operate as at least one part of an unbalanced type antenna of the radio communication circuit. Further, the portable radio communication apparatus further includes a boom portion coupled with the housing at least at two positions so as to provide at least one penetrating hole between the housing and the boom portion.

Disclosed is a multiple loop antenna for a radio frequency identification (RFID) reader, and more particularly, to a multiple loop antenna for a RFID reader that reads information stored in a RFID tag or inputs new information to the RFID tag by inductive coupling.

The multiple loop antenna for a RFID reader serves to communicate information with the RFID tag by inductive coupling, and includes at least three winding groups where they have at least one turn for each group. The winding groups are connected to one another in series and in parallel.

And the same structure is also applicable to RFID tag antenna.

A loop antenna is formed on one side of a circuit board and an IC chip is mounted on the same side of the circuit board. An inner end of the loop antenna is connected to an antenna connection terminal of the IC chip. An arm part provided with a first pad part, a second pad part, and a conducting wire for allowing conduction between the fist pad part and the second pad part is collapsibly provided in such a manner that, when the arm part is collapsed, an outer end of the loop antenna contacts the first pad part and an antenna connection terminal of the IC chip contacts the second pad part.

An electronic part holding film (30) includes an electronic part module (32) and winding conductor patterns (34a, 34b). The winding conductor patterns (34a, 34b) have ends in which terminal pads (35, 36) are formed and to which a connecting part (37) is not connected, respectively. The terminal pads (35, 36) are electrically connected to each other via the electronic part module (32). The electronic part holding film (30) is folded at a folding position (38). In this way, a thin IC tag (20) is manufactured. According to the thin IC tag (20), it is possible to provide a thin IC tag which does not increase the number of manufacturing steps and the manufacturing cost and on which an electronic part and the like can be mounted with ease.

A folding frame for mounting an antenna on an upstanding support structure including first and second support arms pivotally secured to an upper mounting bracket and third and fourth support arms which are pivotally secured to a lower mounting bracket with the upper and lower mounting brackets being secured to the support structure. Support members are pivotally secured to the outer ends of the support arms and are pivotally connected together so that the frame may be pivotally moved from a folded position to a non-folding position. When the frame is in its folded position, it is easily shipped on a pallet.

A loop and inverted-F-shaped reconfigurable cell phone built-in antenna belongs to the field of antenna design and comprises a metal conductor portion, a pin diode and a stopping condenser. The metal conductor portion comprises a folded loop antenna main body, a frequency modulation metal sheet, a feeding branch and a short circuit branch. The antenna main body is disconnected at the positions ofthe pin diode and the stopping condenser and is connected into a whole through the pin diode and the stopping condenser. The antenna has two working states of a loop antenna and an inverted-F-shaped antenna and is controlled by the pin diode. When a switch is turned on, the antenna works in a loop antenna mode, and when the switch is turned off, the antenna works in the inverted-F-shaped antenna mode. The loop and inverted-F-shaped reconfigurable cell phone built-in antenna has the advantages of miniaturization, broad band, multiband and easiness in integration, and is suitable for design forbuilt-in antennas of various small mobile terminals represented by the cell phones.

The invention provides an antenna, a receiving and transmitting device and an electronic device. The antenna comprises a flexible load bearing component and a flexible coil, wherein the flexible coil is arranged on the flexible load bearing component, the flexible load bearing component can be unfolded or curled, and the flexible load bearing component is in a plane shape under an unfolding state. According to the antenna, the receiving and transmitting device and the electronic device, the flexible coil of the antenna is arranged on the flexible load bearing component, the flexible coil under a no-workong state can be wound, the area of an occupied space of the antenna is greatly reduced, and portability in use of a flexible antenna device is significantly improved.

The invention relates to a subscriber identity module (SIM) card with a non-contact interface, which comprises an SIM card and an antenna device. The SIM card is provided with C1 to C8 contacts; the antenna device comprises a coil part, a connecting handle and a contact conversion module; the contact conversion module is connected with the coil part through the connecting handle and is attached to the SIM card; the contact conversion module is provided with S1 to S8 contacts which are connected with the eight contacts on the SIM card through a conductive adhesive, so that antenna contacts are electrically connected with the SIM card. The invention also aims to provide a method for connecting an antenna with the SIM card. The contact conversion module on the antenna device can be well connected with the SIM card and the stability of the antenna is improved. The SIM card and the method have the advantages that: the eight-contact conversion module is adopted, the eight contacts of the SIM card and the eight contacts of the contact conversion module can be completely overlapped, and the eight contacts are positioned on the same plane, so that the problem of poor contact due to virtual connection of the contacts caused by unevenness of the contacts is solved.

The invention discloses a design method for an RFID antenna with an asymmetric structure. The method comprises the following steps of: determining target impedance of the antenna according to the use of the antenna and a chip; designing a first antenna with a symmetric structure, which meets the target impedance, namely designing an annular structure of the antenna, designing a folded structure with two symmetric folded patterns and designing a receiver on the outermost part; designing a second antenna with a symmetric structure, which meets the target impedance, by using the same mode, wherein the folded patterns of the second antenna are different from those of the first antenna and the annular structure and the receiver of the second antenna are the same as those of the first antenna; combining the designed symmetric antennas to form the antenna with the asymmetric structure in a mode that the two folded patterns in the folded structure of the antenna use the folded patterns of the first and second antennas respectively and the annular structure uses the common structure of the first and second antennas; and performing structural fine adjustment on the obtained antenna with the asymmetric structure. The method has good universality, and provides a guide for the design of the asymmetric structural antennas.

A loop antenna device includes a loop antenna having a high noise resistance performance. In a loop antenna having a shield member covering a looped conductor portion formed in a loop shape from a conductive wire, a non-covered portion where the looped conductor portion is not covered is formed in correspondence with a portion of the conductive wire including a reference position for the symmetry of two terminals for connection between the antenna device and a reception circuit. This provides a balanced shield structure. Besides, a line for connecting one end of the conductive wire to the ground potential and a line for connecting the shield member to the ground potential are individually separate from each other, whereby reception of a voltage fall due to common impedance by the antenna is suppressed.

The present invention discloses a wireless communication device with an extendable planar antenna. The antenna is made of a radiating loop, and a ground plane, wherein the loop is parallel to the ground plane and the distance between the loop and the ground plane is configurable, attaining at least two positions: a stowed position where the loop is close to the ground plane, and an operational position where the loop moves apart from the ground plane, to improve the antenna radiation properties. According to one embodiment, this wireless device is a Personal Locator Beacon (PLB) for Search and Rescue (SAR) of people in distress, configured to be wrist worn.

The invention provides a stereo antenna capable of deforming arbitrarily. The stereo antenna comprises a flexible substrate and a coil which is arranged on the flexible substrate. The stereo antenna is connected with a chip. The stereo antenna can be folded into a two-dimensional or three-dimensional structure. Therefore, the stereo antenna can gain more magnetic flux, the card swiping distance is increased in disguised form, and the payment experience is improved.

The invention discloses a foldable F-inverted and annular combined multi-frequency-range communication antenna. The antenna comprises an antenna body which is at least one conductor subcircuit and is provided with a grounding point and a feeding point; on the antenna body, a first branch and a second branch are formed based on the feeding point as an initial end, and a third branch is formed based on the grounding point as an initial end; and the second branch is connected with the tail end of the third branch to form a semi-close first gap, the first branch and the second branch form a semi-close second gap, the joint part of the second branch and the third branch and the tail end of the first branch form a third gap, and the antenna body is also provided with a fourth branch which is generated on the initial end of the third branch. The antenna has the advantages of simple structure, good electrical energy and the like.

The invention relates to a built-in loop antenna of a mobile phone with reconfigurable short circuit point, which belongs to the field of antenna design. The built-in loop antenna comprises a metal conductor part, a first PIN (Positive Intrinsic Negative) diode, and a second PIN diode; the metal conductor part includes a folded loop antenna body, a frequency adjusting metal sheet, a feed branch, a first short circuit branch and a second short circuit branch; the two short circuit branches are grounded through corresponding PIN diodes, so that when the PIN diodes are conducted, the short circuit branches are connected with the ground, and when the PIN diodes are disconnected, the short circuit branches are not connected with the ground; the antenna works in two modes of different frequencies when the two short circuit branches are grounded respectively; and in combination with the two different working modes, the antenna can cover multiple frequency bands. The built-in loop antenna has the advantages of miniaturization, broadband, multiple frequency bands and easy integration, and is suitable for design of the built-in antennas of various small mobile terminals such as mobile phones.

The present disclosure relates to an expandable antenna for a security system that is installed within a wall. The security system may include a control unit. The control unit may include a casing that houses one or more internal components of the control unit and a radio-frequency (RF) communication module that is situated within the casing. The RF communication module includes an antenna connected that is exposed to the exterior of the casing. An expandable antenna connects to the antenna connector. The expandable antenna is fit through an aperture in a wall and is then expanded to an enlarged size within the gap of the wall.

A radio frequency identification (RFID) tag using a monopole antenna is provided, in which an antenna structure is disposed on a metal plate, two ends of an RFID chip are electrically connected to the antenna structure, and the antenna structure and the RFID chip form a loop structure. The RFID tag can be disposed on a surface of an object to be measured, or disposed in an inner accommodation space of the object to be measured, so it is widely used in various applications. Additionally, the RFID tag is easily manufactured, so the production cost can be reduced. Furthermore, the RFID tag has a larger readable distance, and an electromagnetic wave emitting direction of the RFID tag is adjustable according to different included angles between the metal plate and the antenna structure, thereby causing signals to be read easily and identification ability to improve, two desirable effects.

The invention discloses a spring-driven space deployable annular antenna device. The spring-driven space deployable annular antenna device comprises n sets of triangular deployable assemblies and an equilateral right triangle deployable unit A; the equilateral right triangle deployable unit A is composed of n sets of triangular deployable cooperative assemblies connected below the n sets of adjacent triangular deployable assemblies; n is greater than or equal to 2; the n sets of triangular deployable assemblies are connected end to end through four-head hinges; the n sets of triangular deployable cooperative assemblies and the n sets of triangular deployable assemblies share the same set of transverse rods connected through the four-head hinges; the n sets of triangular deployable assemblies and the n sets of triangular deployable cooperative assemblies are connected end to end; and, under the action of the elasticity of a spring, folding or unfolding is carried out, so that the deployable annular antenna device is formed. The device has relatively high geometric stability; a motion mechanism and a control system are simple; after being folded, the device is small in volume and high in accepting rate; an active driving device is unnecessary; the module extensibility is high; accessories are simple; and use requirements of large-aperture space antennas, such as communication satellites and space exploration, can be satisfied.

A vibration transducer for sensing vibrations includes a first flexible triboelectric member, a second flexible triboelectric member, a plurality of attachment points, a first electrode and a second electrode. The first flexible triboelectric member includes a first triboelectric layer and a material being on a first position on a triboelectric series. A conductive layer is deposited on the second side thereof. The second flexible triboelectric member includes a second triboelectric layer and a material being on a second position on the triboelectric series that is different from the first position on the triboelectric series. The second triboelectric member is adjacent to the first flexible triboelectric member. When the first triboelectric member comes into and out of contact with the second triboelectric member as a result of the vibrations, a triboelectric potential difference having a variable intensity corresponding to the vibrations can be sensed between the first and second triboelectric members.

An antenna system for an electronic article surveillance system comprising: a first antenna and the second antenna mounted for use in an substantially overlapping manner, the first antenna configured as a loop, the second antenna configured in a "figure-8"; a control circuit for selectively activating one of the first and second antennas. The first and second antennas each operate as a transmit and receive antenna. The control circuit further comprises a switch to selectively enable operation of one of the antennas when the other is open circuit. One of the antennas transmits and receives while the other circuit, the vice versa. The loop antenna substantially detects markers oriented substantially perpendicular to an elongated axis when entering into a surveillance area. The "figure-8" antenna substantially detects markers oriented substantially parallel to an elongated axis when entering into a surveillance area.

The present invention relates to the radio equipment field, in particular to an inductance value adjustable resonant antenna. The inductance value adjustable resonant antenna comprises a voltage controller, an inverse piezoelectric telescopic effect material, a slide rail, a hinge support, an antenna support and a resonance coil. The inverse piezoelectric telescopic effect material pushes the hinge support to change the antenna gap of the resonant antenna to change the inductance value of the antenna, thereby fine tuning a resonant frequency. The inductance value adjustable resonant antenna enables the antenna gap to be changed equidistantly via a transmission hinge.