252results about How to "Reduce antenna size" patented technology

A miniaturized antenna is described with at least a ceramic substrate (10) and a metallization, particularly designed for use in the high-frequency and microwave ranges. The antenna is characterized in that the metallization is a surface metallization which is formed by a feed terminal (12) for electromagnetic energy to be radiated, by at least a first metallization structure (30), and by a conductor track (20) extending along at least part of the circumference of the substrate (10), which track connects the feed terminal to the at least one first metallization structure (30), which first metallization structure (30) comprises a first conductor track portion (31) extending from a side of the substrate lying opposite the feed terminal (12) towards the feed terminal and a first metallization pad (32). The antenna can be provided on a printed circuit board by surface mounting and has a great impedance and radiation bandwidth, so that it is particularly suitable for use in mobile telephones operating in the GSM and UMTS bands.

An apparatus and method to reduce the size of a microstrip antenna without sacrificing antenna efficiency too much are described. The antenna structure includes discontinuity of strip width in the middle of the antenna patch to reduce the size of the antenna at a given resonant frequency. The antenna structure further includes a plurality of patches of differing widths connected to each other at junctions. The junctions are placed symmetrically to ensure maximum radiation at the boresight and also to further reduce cross-polarization levels. A coaxial feed is connected at a predetermined location near the center of a patch, having a narrower width, in order to match the input impedance of the antenna to the coaxial feed.

The present invention comprises systems and methods for cellular, PCS, GPS and / or Bluetooth mobile communication (e.g., a mobile telephone). The systems and methods employ a fully integrated dual band IFA / loop CDMA antenna for cellular and PCS communication. Fully integrating the CDMA antenna within a PWB provides for mitigation of lumped elements to establish dual banding, and can provide for reduced antenna size, device size, cost and interference form a user's hand. The IFA antenna is configured to transmit and receive within the cellular frequency band via a capacitive tap, and the loop antenna is configured to transmit and receive within the PCS frequency band via an impedance matching stub and ground location. The system and methods further employ a firewall to mitigate antenna coupling, and a metal reflector to reduce the electromagnetic reflection, and improve antenna gain and efficiency.

A method and receiver systems for demodulating and decoding a hierarchically modulated signal, e.g. an 8PSK signal, are disclosed. An exemplary method includes demodulating and processing (502) the hierarchically modulated signal (202) to produce symbols (212) from the first modulation at the first hierarchical level, applying information (504) from a plurality of the symbols from the first modulation at the first hierarchical level in subtracting (214) from the demodulated hierarchically modulated signal to obtain the second modulation at the second hierarchical level and processing (506) the second modulation at the second hierarchical level to produce second symbols (222) from the demodulated second signal. The hierarchically modulated signal comprises a non-uniform 8PSK signal. Applying the information from the plurality of the symbols from the first modulation can be achieved by applying the symbols after error correction. A decision-directed demodulation of the first modulation can also be used to further improve performance.

A multi-band antenna device for a portable radio communication device has first and second radiating elements (10, 20). A controllable switch (30) is arranged between the radiating elements for selectively interconnecting and disconnecting thereof. The state of the switch is controlled by means of a control voltage input (VSwitch). A filter (40) that blocks radio frequency signals is arranged between the feeding portion and the control voltage input. A DC blocking arrangement (50) is arranged between a grounding portion (14) on the first radiating element and ground wherein the first and second radiating element are generally planar and arranged at a predetermined distance above a ground plane. By means of this arrangement, two broad and spaced apart frequency bands are obtained with retained performance and small overall size of the antenna device. A communication device comprising such an antenna device is also provided.

An imaging system for a rotary aircraft having a millimeter wave imager with visible or infrared overlay. The system includes an active millimeter wave imaging system comprising a millimeter wave transmitter and a millimeter wave phased array receiver for producing millimeter wave images of a landing region, a second imaging system operating at visible or infrared wavelengths to produce visible or infrared images of the landing region, and a processor programmed with a see and remember algorithm for overlaying the visible or infrared images and the millimeter wave images and to save at least one good high-resolution visible or infrared image in case of a brownout event begins to obscuring the visible or infrared images wherein in case of the brownout event the millimeter wave images are overlaid on the at least one good visible or infrared image and not obscured visible or infrared images.

A communication antenna (10) having a driven element (16) extending between a feed point (13) and an attachment point (15) to a top loaded element in which the driven element (16) is longer than the shortest distance (P) between the feed point (13) and the attachment point (15), the driven element (16) being configured to follow a meandering path between the feed point (13) and the attachment point (15). The driven element (16) is at least in part in the form of straight sections joined to give a zigzag configuration (16). Alternatively the driven element (16) is at least in part in the form of curved sections. At least a pair of parasitic elements (18, 19) can be provided with the members of the pair (18, 19) being disposed on opposite sides of, and off-set from, the driven element (16) and parallel to a straight ling (P) linking the feed point (13) to the attachment point (15); the parasitic elements (18, 19) serving to provide impedance matching and increased bandwidth and providing shielding against radiation from the antenna in a predetermined direction. Typically passive elements can be incorporated with the parasitic elements (18, 19) to provide for the overall reduction in the size of the antenna (10.

It is an object of the present invention to provide an ID chip in which gain of an antenna is increased and the mechanical strength of an integrated circuit can be enhanced without suppressing a circuit scale. A semiconductor device typified by an ID chip of the present invention includes an integrated circuit using a semiconductor element formed from a thin semiconductor film and an antenna connected to the integrated circuit. The antenna and the integrated circuit are formed on a substrate, and a conducting wire or a conductive film included in the antenna is divided into two layers and formed so as to sandwich the substrate provided with the integrated circuit.

A complementary wideband antenna includes a planar dipole formed of two dipole sections and a shorted patch antenna located between the dipole sections, the dipole sections being spaced above a ground plane. A variety of different feed probe designs can be used to excite the antenna. The complementary wideband antenna has electrical characteristics including low back radiation, low cross polarization, a symmetrical radiation pattern, and is stable in gain and radiation pattern shape over the frequency bandwidth.

A multiband planar inverted F antenna (PIFA) can provide improved performance and operating efficiency, and utilizes a capacitive element configured to provide high efficiency operation, and a tuning area that allows the antenna to be tuned independently of the capacitive element. As a result of this feature, the antenna can be tuned to the desired operating frequencies, while allowing the capacitive element to remain configured for optimal operating efficiency. The antenna can be configured in a loop for effective utilization of a given volume and can therefore be relatively small in size and high efficiency. A capacitive loading section can be included to allow improved antenna efficiency and radiation. Additionally, tuning section can be provided to allow the antenna to be tuned without adjusting the capacitive loading section. To obtain operation at an additional frequency band, a parasitic element or a slot configuration can be included.

An indoor UHF antenna device for a digital television includes a flat structural design. The flat indoor UHF antenna device includes a circuit board having a wireless signal processing circuit and an antenna. A metal wire bent as a long rectangular antenna and having a gap forms the antenna. Two signal feeder points are defined at two locations having a same distance from two long sides of the long rectangular antenna respectively, and thereby the antenna includes a first antenna part having a gap and a second antenna part for impedance matching. The antenna is set horizontally on the circuit board with the signal feeder points welded on the circuit board. Thereby the antenna device of the present invention is enhanced to receive wireless signals of polarized waves transmitted by different transmitters.

The present invention discloses a multiband antenna. The antenna comprises a ground plane, a dielectric substrate and a radiating metal portion. The dielectric substrate is located at one side edge of the ground plane. The radiating metal portion is disposed on one surface of the dielectric substrate and comprises a first metal portion and a second metal portion. The first metal portion is substantially of an L-shape. One end of the first metal portion is adjacent to the side edge of the ground plane and is the antenna's feeding point connected to a signal source, and the other end of the first metal portion is an open end. The second metal portion comprises a U-shape portion. The second metal portion comprises a first open end and a second open end, which are respectively located on two opposite sides of the open end of the first metal portion. The first open end has a first coupling gap between the first open end and the open end of the first metal portion; and the second open end has a second coupling gap between the second open end and the open end of the first metal portion. The second metal portion is further short-circuited to the ground plane by a shorting metal line.

A dielectric antenna (1) having at least one supply element (2) and at least one lens (3) formed of a dielectric material. The dielectric antenna makes it possible to measure the surface of a medium with an essentially consistent measuring accuracy in that the lens (3) has an outer component (4) and an inner component (5). The outer component (4) has a radiating surface (6) that is spherical and an inner surface (7) that is spherical, and the inner component (5) has a contact surface (8) that spherical. Furthermore, the antenna is usable as part of a fill level sensor operating on the radar principle.

A radar apparatus includes: a plurality of receiving antennas disposed at regular spacings; two transmitting antennas which are positioned each at opposed ends of the receiving antennas, and a spacing of which away from the receiving antennas adjacent thereto is a natural number multiple of half a disposition spacing of the plurality of the receiving antennas; and a signal processor which, after the two transmitting antennas transmit electric waves in time divisions, and then one for each of the plurality of receiving antennas receives waves reflected from a target, subjects the obtained received signals to a digital beam forming process, in which case the signal processor, after subjecting the received signals to a fast Fourier transform process in a time direction, carries out a fast Fourier transform process in a space direction.

A compact and low-cost antenna device in which no interference occurs even when many antenna units corresponding to various systems are mounted close together in a small area, and a wireless communication apparatus including the antenna device. An antenna device includes plural antenna units mounted on a single dielectric base. A first antenna unit having a lowest fundamental frequency is disposed at a left end of a non-ground region, a second antenna unit having a highest fundamental frequency of the plurality of the antenna units is disposed at a right end of the non-ground region, and a third antenna unit having a fundamental frequency between those of the first antenna unit and the second antenna unit is disposed between the first and second antenna units. A current-density control coil is connected between a first radiation electrode and a power feeder of the first antenna unit, while a reactance circuit is disposed in the middle of the first radiation electrode. Notches may be disposed between the first radiation electrode and a second radiation electrode and between the first radiation electrode and a third radiation electrode.

A multi-band antenna device for a portable radio communication device has first and second radiating elements (10, 20′). A controllable switch (30) is arranged between the radiating elements for selectively interconnecting and disconnecting thereof. The state of the switch is controlled by means of a control voltage input (VSwitch). A filter (40) comprising a pure resistance that blocks radio frequency signals is arranged between the second radiating element and the control voltage input. By means of this arrangement, two broad and spaced apart frequency bands are obtained with retained performance and small overall size of the antenna device. A communication device comprising such an antenna device is also provided.

To provide an antenna element having a radiation electrode formed mainly on one surface of a dielectric substrate. The radiation electrode is substantially symmetric in form with respect to the center thereof, and has a first half and a second half with the same direction of main polarization of radiation emitted therefrom. Each of the halves of the radiation electrode may be a quarter-wave antenna for a wavelength of the emitted radiation. A power supply conductor to be connected to a high frequency signal source is connected to the first half of the radiation electrode, and a ground conductor to be connected to a ground is connected to the second half. A total impedance of the first half of the radiation electrode and the power supply conductor and a total impedance of the second half of the radiation electrode and the ground conductor can substantially match to one another, so that resonance between the halves of the radiation electrode can be enhanced and a wider bandwidth can be realized.

The invention relates to a lens antenna. The invention also relates to an antenna system for transmitting and receiving electromagnetic signals comprising at least one antenna according to the invention. The invention further relates to a method of manufacturing an antenna according to the invention. The invention moreover relates to a method for use in wireless communications by using an antenna according to the invention. The invention additionally relates to a RF transceiver of a wireless communications device comprising at least one antenna according to the invention. The invention further relates to an electronic device comprising an RF transceiver according to the invention.

An NFC initiator device requests a passive communication mode by modulating a request onto a first carrier signal. In response thereto, the target device transmits a second carrier signal while still receiving the first carrier signal from the initiator device. The target device may modulate data onto the second carrier signal to convey information to the initiator device. The initiator device may detect changes in the load provided by the target device to interpret the data conveyed by the target device.

The disclosure provides a multi-angle flexible antenna for electronic device comprising an antenna expand having the radiated elements supported by a first substrate and expanding into a spatial geometry for transmission and reception of radio signal; and an antenna base having a plurality of first solder pads on a second substrate for physical attachment to the printed circuit board and a second solder pad electrically connected to a terminal of the radiated elements for connection to an antenna feed point of a radio circuitry on the printed circuit board; wherein the first and second substrates are joined at a bending line as a single substrate for the flexible antenna and the first substrate allowed to be bent relative to the plane of the second substrate for spatial deployment of the radiated elements.

An antenna structure includes a radiating element and an antenna radome. The antenna radome has at least one dielectric layer, which has an upper surface having many S-shaped metal patterns and a lower surface having many inverse S-shaped metal patterns corresponding to the S-shaped metal patterns. The S-shaped metal patterns are respectively coupled to the corresponding inverse S-shaped metal patterns to converge radiating beams outputted from the radiating element.

An antenna system internal to a radio device, the system comprising separate antennas and having separate operating bands. The system is implemented as decentralized in a way that each antenna is typically based on a small-sized chip component (310; 320; 330; 340; 350; 360; 610), which are located at suitable places on the circuit board (PCB) and possibly on also another internal surface in the device. The chip component comprises a ceramic substrate and at least one radiating element. The operating band of an individual antenna covers e.g. the frequency range used by a radio system or only the transmitting or receiving band in that range. At least one antenna is connected to an adjusting circuit with a switch, by which the antenna's operating band can be displaced in a desired way. In this case the operating band covers at a time a part of the frequency range used by one or two radio systems. The antennas can be made small-sized, because a relatively small bandwidth is sufficient for an individual antenna, when there is a plurality of antennas. When the bandwidth is small, a material with higher permittivity can be chosen for the antenna than for an antenna having a wider band, in which case the antenna dimensions can be made correspondingly smaller. In addition, a good matching of the antenna is achieved on the whole width of each radio system, because the matching of a separate antenna having a relatively narrow band is easier to arrange than that of a combined multiband antenna.

A miniature broadband stacked microstrip patch antenna formed by two patches, an active and a parasitic patches, where at least one of them is defined by a Ring-Like Space-Filling Surface (RSFS) being this RSFS newly defined in the present invention. By means of this novel technique, the size of the antenna can be reduced with respect to prior art, or alternatively, given a fixed size the antenna can operate at a lower frequency with respect to a conventional microstrip patch antenna of the same size and with and enhanced bandwidth. Also, the antennas feature a high-gain when operated at a high order mode.

An antenna of this invention comprises an antenna element to which power is fed at a feed point; and a ground pattern that is juxtaposed with the antenna element and in which a tapered shape is formed with respect to the feed point of the antenna element. By providing the tapered shape for the ground pattern, it is possible to appropriately adjust the coupling degree with the antenna element, thereby it is possible to widen the bandwidth. Moreover, since the ground pattern and the antenna element are juxtaposed with each other, miniaturization can be achieved. When the antenna element is integrally formed in a dielectric substrate, further miniaturization can be achieved. Furthermore, when a cut-out portion is formed in the antenna element, the characteristic of the antenna in the low frequency range is improved.

An antenna structure includes a radiating element and an antenna radome. The antenna radome has at least one dielectric layer, which has an upper surface having many S-shaped metal patterns and a lower surface having many inverse S-shaped metal patterns corresponding to the S-shaped metal patterns. The S-shaped metal patterns are respectively coupled to the corresponding inverse S-shaped metal patterns to converge radiating beams outputted from the radiating element.

The present invention comprises an antenna device for a portable radio communication device operable in at least a first and a second frequency band. The antenna device comprises a first electrically conductive radiating element having a feeding portion connectable to a feed device (RF) of the radio communication device for feeding and receiving radio frequency signals, a first ground plane portion arranged at a distance from the first radiating element, a second ground plane portion, and a controllable switch arranged between the first and second ground plane portion for selectively interconnecting or disconnecting the first and second ground plane portion.

A patch antenna for receiving high frequency wireless signal and a rectenna using the same, more particularly, an impedance-matched patch antenna adopting a slot capacitive coupling structure and a rectenna capable of generating electrical energy from the wireless signals having different frequency band. A rectenna for receiving an A.C. wireless signal carrying electrical energy and converting the wireless signal into a D.C. electrical energy, is comprised of: a patch antenna for receiving the wireless signal comprising an dielectric substrate, a patch that is formed at the upper area of the surface of the dielectric substrate and providing the first frequency response characteristics, a ground plane formed on the other surface of the dielectric substrate, and an impedance matching means providing the second frequency response characteristics; and a rectifying unit that converts the wireless signal, received via the patch antenna, into a D.C. electrical energy by rectifying the wireless signal.