12results about "Screened loop antennas" patented technology

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).

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.

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.

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 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.