195 results about "Wide band antenna" patented technology

Disclosed are systems and methods which provide multi-band antenna elements using multiple radiating branches interconnected with a feed plate, thereby providing a multi-band antenna element having a single feed. Additionally or alternatively, a wide band antenna configuration is provided utilizing multiple radiating branches of a multi-band antenna element of the present invention. Embodiments utilize one or more reflectors, such as to provide directivity and/or radiation pattern shaping, including utilizing one or more radiating branches of a multi-band antenna element as a reflector for another one or more radiating branches of the multi-band antenna.

The present invention provides a broad-band antenna for mobile communication in which a desired antenna characteristic is obtained in plural frequency bands of a portable phone or the like. A metal plate 16 having a suitable shape is disposed on an upper surface of a carrier 14 provided on a circuit board 10, and a first and a second antenna elements functioning as inverted-F antennas respectively resonant at a first frequency band and a second frequency band higher than the former are formed by electrically connecting the metal plate 16 to a grounding plate 12 and the circuit board 10 by an earthing terminal 18 and a feed terminal 20, respectively. A third antenna element 24 having a base end electrically connected to the feed terminal 20 and resonant at a third frequency band higher than the second frequency band is provided on a side surface of the carrier 14, ends of the second antenna element and the third antenna element 24 are disposed to be spaced from each other by a distance of 0.1 wavelength or more of the third frequency band, and the end of the third antenna element 24 is disposed to be spaced from the grounding plate 12 by a distance of 0.01 wavelength or more of the third frequency band. Besides, the third antenna element may be made resonant at a fourth frequency band higher than the third frequency band, and a matching circuit to perform matching for the third frequency band may be provided.

A monopole-type antenna for multi- or wide-band use to transmit or receive radio frequency electromagnetic energy. A feed point, provides energy into the antenna or receives energy from the antenna. A driven radiating section includes a first top-loading element and a feed conductor that electrically connects the feed point linearly to the first top-loading element, yet with the driven radiating section not electrically connected to a grounding surface. A parasitic radiating section includes a second top-loading element and a bridge conductor that electrically connects the second top-loading element linearly to the grounding surface When energy is then provided at the feed point and conducted to the driven radiating section, it produces a first resonance mode, coupling at least some of the energy into and exciting the parasitic radiating section to produce a second resonance mode.

A system and method for providing a compact azimuth beamwidth in a wide band antenna. The system comprises a first radiating element disposed above a ground plane and one or more parasitic elements disposed proximate to and/or around the first radiating element. Each of the parasitic elements has a slot formed therein that is configured to control beamwidth across a specific frequency range. In one embodiment, the parasitic elements and the slots can be configured to control beamwidth across different frequency ranges. And in another embodiment, another parasitic element is disposed within the slots to control beamwidth across another frequency range.

An antenna means (2) for transmitting and receiving RF signals, comprising: a ground plane (11) arranged to be connected to ground of the circuitry of a radio communication device and a conductive radiating structure (20) in the form of a band. The radiating structure has in a first end a feed portion (21) arranged to be coupled to circuitry of a radio communication device. The radiating structure has a second end which is a free end (29). The band has a first (A) and a second (B) surface, and is divided by bent portions into a number of sections Sn along its length. The band is bent or folded so that the first surface (A) of a first section S1 faces the first surface (A) of a second section S2, being adjacent to the first section S1, and the second surface (B) of a section Sm faces the second surface (B) of a consecutive section Sm+1, whereby a compact antenna means which can operate within a wide frequency band is achieved.

Low-loss printed circuit boards, low-loss wide-band antennas, and manufacturing methods thereof are provided by using a resin as a board material. A resin material (101) having a predetermined shape is prepared in a molding step, and the resin material (101) is foamed in a foaming step. As a result, a skin layer (111) and a foamed part (112) are formed. Since the skin layer (111) does not allow close contact of plating, the skin layer (111) is removed in the shape of a conductor pattern in a skin-layer removing step to expose the foamed part (112) in the interior. Electroless plating is carried out in a conductor-layer forming step; and, as a result, plating is brought into close contact with the foamed part (112) having an anchor effect, and a conductor layer (120) is formed.

The present invention provides a method and an apparatus for detecting a communication channel in whose frequency band radio signals are transmitted by different radio signal sources inside a cabin. In this case a wide band antenna receives the radio signals transmitted inside the cabin. Different demodulators are provided, each of which demodulate the radio signals received by the wide band antenna within an associated frequency range of the demodulator. A configuration logic establishes whether, in a frequency hand within a demodulated frequency range, radio signals are being transmitted simultaneously by different radio signal sources. In the case of impermissible signal transmissions of a radio signal source, e.g. when a non-safety-relevant system transmits signals in the same frequency band of a safety-relevant system in the same frequency bands of a safety-relevant system, the non-safety-relevant system is reconfigured by the configuration logic and an alarm or warning signal is generated as an indication of the impermissible condition.

A band-notched ultra-wideband antenna comprises a top layer non-uniform short-circuit metal patch, a middle layer metal radiation patch, and a bottom layer metal patch. The bottom layer metal patch includes a coupled open/short circuit stub which is set close to the middle layer metal radiation patch. The equivalent circuit of the top layer non-uniform short-circuit metal patch is a parallel LC resonator, and the equivalent circuit of the coupled open/short circuit stub is a series LC resonator. The resonant frequency of the top layer non-uniform short-circuit metal patch is equivalent to the resonant frequency of the coupled open/short circuit stub, so as to function as a second-order bandstop filter to yield high notch-band-edge selectivity without increasing total circuit area of the band-notched ultra-wideband antenna.

The invention discloses a multimode broadband antenna module and a wireless terminal, which belong to the field of wireless communication. The multimode broadband antenna module not only has a large-range work broadband, but also has quite a small size. The multimode broadband antenna module comprises a printing circuit board and an antenna body. The antenna body comprises a first radiation body and a second radiation body, which are electrically connected to the printing circuit board. The first radiation body comprises a connecting part, a low-frequency part and a high-frequency part. The second radiation body comprises a grounding part, a low-frequency part and a high-frequency part. A first preset distance is disposed between the low-frequency part of the first radiation body and the low-frequency part of the second radiation body. A second preset distance is disposed between the high-frequency part of the first radiation body and the high-frequency part of the second radiation body. Accordingly, a coupling capacitance effect can be formed between the first radiation body and the second radiation body.

A wide band antenna. The antenna comprises a radiating element in a corner region of a substrate, spaced apart from a ground plane occupying a substantial portion of a remaining area of the substrate. Series and shunt impedance matching elements are connected to the radiating element to control the antenna operating parameters. The radiating element is connected to a signal feed.

This is a transformer local discharge ultrawide-band sensor array orientation system. Four elements ultrawide-band RF sensor arrays are micro size wide-band antenna and their designed upper limit frequency isn't lower than 6 GHz. The elements aren't in one circumcircle and the space between of element isn't smaller than 80cm. Set each group of sensor array at both side of the transformer iron core. Respectively connect the feeder to the four ultrawide-band amplifiers of 1GHz-6GHz by same length and low wastage high frequency RF cable, and the export ending of amplifier connects to the high-speed collecting figure oscillograph. Test the arriving time difference of the element test single with the others by the sensor array to find the position of the transformer local discharge radiant point. The orientation system and method adopt the existing instrument and achieve the veracious orientation and can be used on line.

A broadband antenna constructed according to the present invention for use with an RFID tag device is formed with a three dimensional (3D) structure. The 3D structure of the antenna enables the antenna to be constructed with a size smaller than that of conventional two-dimensional antennas, consequently reducing the size of the overall tag device, but without any loss of efficiency. The 3D antennas are formed with Archimedean spiral sections and can be tuned to a specific frequency in a particular frequency band, enabling many more unique RFID devices to be defined and operate within that band in conjunction with a reader utilizing a frequency-hopping method without interfering with one another. Additionally, the antenna can receive signals from a higher frequency band than the band in which the antenna resonates to enable those higher power signals to supply power to the device without interfering with the resonant frequency signals received by and transmitted from the RFID device.

The invention discloses a super-wide band antenna with a notching characteristic. The super-wide band antenna comprises a radiating unit (1), a metal ground plane (2), a medium substrate (3) and a micro-strip feed line (4). A combination body of the radiating unit (1) and the micro-strip feed line (4) is located on the top face of the medium substrate (3). The metal ground plane (2) is located on the bottom face of the medium substrate (3). The radiating unit (1) is in a gradually varied ladder shape. According to the super-wide band antenna with the notching characteristic, the radiating unit (1) adopts a rectangle shape, frequency range of the antenna is expanded through design of the gradually varied steps, and the antenna is convenient to design and debug and can be used in a super-wide band wireless communication system. On the condition that the size of the antenna is minimized, a semi-oval notch or a ladder-shaped notch (5) of the super-wide band antenna improves bandwidth of low frequency stage of the antenna, and achieves impedance bandwidth of a super-wide band.

Directional wide band antenna that may be utilized to enhance cell phone coverage within a building, and/or for signals intelligence collection (SIGINT). Includes a spiral antenna with feed-point configured to transfer energy to/from the antenna. Includes an energy absorbent backing and an energy absorbent siding coupled with the spiral antenna. Includes a cavity behind the log-spiral slot antenna and in front of the energy absorbent backing. Includes a cable connector coupled to a tapered microstrip line coupled to the feed-point wherein the tapered microstrip line is configured to transform the input impedance to the antenna impedance. Housed in a container configured to hold the above listed components. Energy absorbent siding, cavity and energy absorbent backing greatly reduces back lobes. Another embodiment has log-spiral shaped slots at an outer portion of the log-spiral slot antenna overlap with the energy absorbent siding and wherein the feed-point overlaps the cavity.

An antenna common to a plurality of frequencies in which a wide band of a UWB system can be covered while suppressing interference with other systems. The antenna comprises a plurality of element part conductors, coupling conductors for coupling them electrically, and a feeder for coupling one element part conductor electrically with a feeder part capable of feeding to that element part conductor, wherein respective element part conductors are concatenated sequentially by the coupling conductors. The element part conductor has a shape substantially symmetric to a line connecting the coupling conductors or the parts coupled with the feeder. Each coupling conductor is arranged substantially linearly and the plane part of each planar conductor is arranged substantially vertically.

A method for applying an algorithm to facilitate the design of wideband omnidirectional antennas, and the design of sleeve cage monopole and sleeve helix units includes rapid resolution of a complex relationship among antenna components to yield an optimal system. A genetic algorithm is used with fitness values for design factors expressed in terms to yield optimum combinations. Cage antennas are optimized via a genetic algorithm for operation over a wide band with low VSWR. Genetic algorithms and an integral equation solver are employed to determine the position and lengths of parasitic wires around a cage antenna in order to minimize VSWR over a band. The cage may be replaced by a normal mode quadrifilar helix for height reduction and with re-optimized parasites.

An ultra wide band antenna having a 270° coverage and a system thereof. The ultra wide band antenna includes a dielectric substrate, two Vivaldi horn radiators attached to the dielectric substrate and including central axes orthogonal to each other, and a single radiator coupled to the two Vivaldi horn radiators. The ultra wide band antenna system includes: a first ultra wide band antenna including a dielectric substrate, two Vivaldi horn radiators attached to the dielectric substrate and including central axes orthogonal to each other, and a single radiator coupled to the two Vivaldi horn radiators; and a second ultra wide band antenna including a dielectric substrate, two Vivaldi horn radiators attached to the dielectric substrate and including central axes orthogonal to each other, and a single radiator coupled to the two Vivaldi horn radiators, positioned on an identical plane to the first ultra wide band antenna, and forming a line symmetric structure together with the first ultra wide band antenna.