22results about "Screened loop antennas" patented technology

The invention relates to an active antenna comprising a single-turn loop, for example an antenna for radio communications and / or electromagnetic field measurements. An active antenna according to the invention comprises: a first element (11), the first element being an electrical conductor; a second element (12), the second element being an electrical conductor; a third element (3), the third element being an electrical conductor, a first end of the third element being directly coupled to a first end of the first element and to a first end of the second element; and a differential amplifier having a positive input terminal coupled to a second end of the first element, a negative input terminal coupled to a second end of the second element, and a reference node coupled to a second end of the third element, an output port of the active antenna being coupled to an output of the differential amplifier.Figure for abstract: Figure 4.

The invention relates to a passive antenna having a shielded frame, for example an antenna for producing a known radio-frequency magnetic field in a laboratory. A passive antenna according to the invention comprises: a first element (1), the first element being a transmission line having an outer conductor (11) and an inner conductor (12), the first element being a part of a shielded frame; a second element (2), the second element being a transmission line having an outer conductor (21) and an inner conductor (22), the second element being a part of the shielded frame, one end of the inner conductor of the transmission line of the second element being directly coupled to one end of the inner conductor of the transmission line of the first element; a base (3); a single-port linear device having a resistor and a capacitor; and a port of the passive antenna. Figure for abstract: Figure 6.

Disclosed is a smart contact lens (100, 100a) including a visible area (110), an outer ring area (120), a signal source (130), an antenna assembly (140), an induction coil (150), a high pass filter (160), an induction module (170), and a low pass filter (180). The outer ring area (120) encircles the visible area (110). The signal source (130) is disposed in the outer ring area (120). The antenna assembly (140) is disposed in the outer ring area (120) and connected to the signal source (130). The induction coil (150) is disposed in the outer ring area (120) and encircles the antenna assembly (140). The induction coil (150) and the antenna assembly (140) jointly resonate at an ultra-high frequency band, and the ultra-high frequency band is between 902 MHz and 928 MHz.

The invention relates to a device for long-term temperature measurement of temperatures above 200°C, which comprises a transponder (1) and an antenna connected to the transponder (1) via a coaxial cable (4), the antenna connection (2) of the transponder (1) being connected to the inner conductor (3) of the coaxial conductor (4) and the outer conductor (5) being connected to the ground potential of the transponder (1). In order to design such a device so that, with low component requirements and construction effort, improved transmission conditions are made possible cost-effectively, without the need for elaborate coordination of the components with one another, according to the invention the self-supporting coaxial cable (4) forms a loop antenna (9), the internal conductor (3) of which is connected to the ground potential on the end opposite the transponder (1).

Disclosed is a multi-band base station antenna using a selective shielding surface. The disclosed antenna comprises: a selective shielding surface which passes signals in a preset frequency band; a plurality of low-band radiators located on the selective shielding surface; a reflection plate disposed below the selective shielding surface and spaced apart from the selective shielding surface; and a plurality of high-band radiators coupled onto the reflection plate, wherein the selective shielding surface has a pass band configured to pass signals emitted from the high-band radiators and block signals emitted from the low-band radiators. According to the disclosed antenna, in a multi-band base station antenna for 5G where beamforming is performed at various angles, there is an advantage in that interference between the high-band radiators and the low-band radiators can be effectively suppressed by using the selective shielding surface.

This communication device is for a wireless communication device. The communication device comprises: a first shield device that defines a first shield space disposed along a conveyance path for conveying an inlay sheet which has a plurality of wireless communication devices and a metal pattern disposed between the plurality of wireless communication devices and in which the metal pattern is separated from the plurality of wireless communication devices; and a reader / writer antenna disposed in the first shield space. The first shield space has a size in which one wireless communication device among the plurality of wireless communication devices can be disposed. The first shield device has a conductor that makes contact with the metal pattern.

In some embodiments, a radio frequency identification (RFID) system may include at least one Ultra High Frequency (UHF) antenna component, a conductive loop having a largest dimension that is smaller than the wavelength of radiation transmitted at a Microwave Frequency (MW). The conductive loop may define a gap and an RFID chip may be electrically coupled to the conductive loop. The conductive loop may be configured to be resonant at an Ultra High Frequency (UHF) and less resonant at Microwave Frequency (MW). The antenna component may be selected from the group consisting of a dipole antenna, a monopole antenna, a loop antenna, or a slot antenna.

Various embodiments of inductor coils, antennas, and transmission bases configured for wireless electrical energy transmission are provided. These embodiments are configured to wirelessly transmit or receive electrical energy or data via near field magnetic coupling. The embodiments of inductor coils comprise a figure eight configuration that improve efficiency of wireless transmission efficiency. The embodiments of the transmission base are configured with at least one transmitting antenna and a transmitting electrical circuit positioned within the transmission base. The transmission base is configured so that at least one electronic device can be wirelessly electrically charged or powered by positioning the at least one device in contact with or adjacent to the transmission base.

System and method for monitoring material change by measuring at least one metric. In a first configuration, an EM signal is transmitted across a calibrated transmission configuration to at least one load including the material, the reflection is measured, and the at least one metric is calculated based at least on the reflection. In a second configuration, an EM signal is transmitted in the vicinity of at least one resonator that is operably coupled with a load that can include the material. An EM signal is received that has been affected by the resonator, and a measurement of the at least one metric can be based at least on the received signal.

In some embodiments, a radio frequency identification (RFID) system may include at least one ultra-high frequency (UHF) antenna component and a conductive loop having a maximum dimension smaller than a wavelength of radiation transmitted at microwave frequencies (MW). The conductive loop may define a gap, and the RFID chip may be electrically coupled to the conductive loop. The conductive loop may be configured to resonate at ultra-high frequency (UHF) and less resonate at microwave frequencies (MW). The antenna component may be selected from the group consisting of a dipole antenna, a monopole antenna, a loop antenna, or a slot antenna.

Disclosed is a smart contact lens including a visible area, an outer ring area, a signal source, an antenna assembly, an induction coil, a high pass filter, an induction module, and a low pass filter. The outer ring area encircles the visible area. The signal source is disposed in the outer ring area. The antenna assembly is disposed in the outer ring area and connected to the signal source. The induction coil is disposed in the outer ring area and encircles the antenna assembly. The high pass filter is connected to the signal source and the induction coil. The induction module is disposed in the outer ring area. The low pass filter is connected to the induction coil and the induction module. The induction coil and the antenna assembly jointly resonate at an ultra-high frequency band, and the ultra-high frequency band is between 902 MHz and 928 MHz.

The utility model relates to a loop antenna electronic key device, which comprises a loop antenna module and a packaging body, the loop antenna module comprises an integrated multi-antenna unit, a control unit and a flexible substrate, and the integrated multi-antenna unit comprises a UWB antenna main body, a WLC antenna main body and a BLE antenna main body. The integrated multi-antenna unit and the control unit are pressed on the flexible substrate, the annular antenna module is packaged by the packaging body, and the whole device is of an annular structure. Compared with the prior art, the device has the advantages of compact structure, convenience in use and the like.

The invention relates to an active antenna including a single-turn loop, for example, an antenna for radio communications and / or electromagnetic field measurements. An active antenna according to the invention comprises: a first element (11), the first element being an electrical conductor; a second element (12), the second element being an electrical conductor; a third element (3), the third element being an electrical conductor, a first end of the third element being directly coupled to a first end of the first element and to a first end of the second element; a transformer having a primary, a secondary, and a ferrite core; and an amplifier, an input port of the amplifier being coupled to the secondary, and an output port of the active antenna being coupled to an output of the amplifier. Figure 5 is shown for the abstract.

The present invention provides a magnetic field shielding sheet for an antenna module. The magnetic field shielding sheet for an antenna module according to an exemplary embodiment of the present invention is applicable to an antenna module including a magnet for an alignment position and an antenna unit operating in a prescribed frequency band, wherein the magnetic field shielding sheet for an antenna module includes a main shielding sheet made of a magnetic material to shield a magnetic field generated from the antenna unit, and at least one magnetic saturation preventing member laminated on a surface of the main shielding sheet to prevent magnetic saturation of the main shielding sheet by inducing a direct current magnetic field generated from the magnet. The magnetic saturation preventing member has a number corresponding to the magnet provided in the antenna module, and is disposed on a surface of the main shielding sheet in a manner to be located in a position corresponding to the magnet provided in the antenna module.

The invention relates to an active antenna comprising a single-turn loop aerial, for instance an antenna for radio communications and / or electromagnetic field measurements. An active antenna of the invention comprises: a first element (11), the first element being an electric conductor; a second element (12), the second element being an electric conductor; a third element (3), the third element being an electric conductor, a first end of the third element being directly coupled to a first end of the first element and to a first end of the second element; and a differential amplifier having a positive input terminal coupled to a second end of the first element, a negative input terminal coupled to a second end of the second element, and a reference node coupled to a second end of the third element, an output port of the active antenna being coupled to an output of the differential amplifier.