Class / Patent application number | Description | Number of patent applications / Date published |
343748000 | Loop type | 18 |
20090051612 | ADJUSTABLE ANTENNA COIL - An antenna coil formed on a substrate surface of an insulating substrate has conductor lines forming four sides of a basic loop shape. Furthermore, the antenna coil has corner lines at a corner portion of the loop. For example, by forming trimming lines on the inner side of one of the corner lines, it becomes possible to adjust the resonant frequency in various ways without considerably disturbing the shape of distribution of magnetic flux density generated by the antenna coil as a whole. | 02-26-2009 |
20090174618 | RF module integrated with active antenna - A radio frequency (RF) module integrated with an active antenna includes a silicon chip carrier, an active antenna circuit and a main circuit unit. The active antenna circuit unit is integrated into the silicon chip carrier via a semiconductor process. The active antenna circuit unit further includes an antenna loop formed on the silicon chip carrier for receiving and transmitting an RF signal. The active circuit unit is mounted on the silicon chip carrier and electrically connected to the active antenna circuit unit for processing the RF signal. Thereby the module is made compact. | 07-09-2009 |
20090231223 | COMPACT REMOTE TUNED ANTENNA - A compact electrically long antenna including a manual or computer remote controlled tuning system using switched electrical length capable of operation at high RF power levels. An electromechanical relay or other switch device provides remote control (by a parallel binary bit pattern over great distance) of radiating structures formed of series connected absolute binary sequence electrical length radiating elements in a main circuit loop having a total electrical length. These radiating structures are formed from individual elements, and sets of individual elements, insulated and isolated from each other. The binary controlled switch devices may unshort (connect) and short out (bypass) binary length elements in the main loop circuit. The electrical length of the main loop circuit can be set to a desired length, from a maximum total length of all binary length elements in series to a minimum length where all binary elements are shorted out and effectively bypassed. | 09-17-2009 |
20090278756 | ACTIVE TUNED LOOP-COUPLED ANTENNA - An active tuned loop-coupled antenna capable of optimizing performance over incremental bandwidths and capable of tuning over a large total bandwidth to be used in wireless communications. The active loop is capable of serving as the radiating element or a radiating element can be coupled to this active loop. Multiple active tuned loops can be coupled together to extend the total bandwidth of the antenna. Active components can be incorporated into the antenna structure to provide yet additional extension of the bandwidth along with increased optimization of antenna performance over the frequency range of the antenna. | 11-12-2009 |
20100238080 | Antenna Device and Portable Radio Communication Device Comprising Such Antenna Device - The present invention relates to an antenna device for a portable radio communication device adapted for receiving radio signals in at least a first operating frequency band. The antenna device comprises a radiating element comprising a feeding portion and a tuning capacitor connected to the feeding portion of the radiating element. The antenna device further comprises a low pass filter connected to the feeding portion and to a high impedance low noise amplifier for the at least a first operating frequency band, between the tuning capacitor and the high impedance low noise amplifier. | 09-23-2010 |
20110018775 | Planar Compound Loop Antenna - The present invention relates to planar compound field antennas. Improvements relate particularly, but not exclusively, to compound loop antennas having coplanar electric field radiators and magnetic loops with electric fields orthogonal to magnetic fields that achieve performance benefits in higher bandwidth (lower Q), greater radiation intensity/power/gain, and greater efficiency. | 01-27-2011 |
20110285596 | INDUCTIVELY COUPLED BAND SELECTABLE AND TUNABLE ANTENNA - An inductively coupled band selectable and tunable antenna, the antenna including a first conductive segment, a second conductive segment interleaved with the first conductive segment and inductively coupled to the first conductive segment, band selection hardware located along the first conductive segment and tuning hardware located along the second conductive segment. | 11-24-2011 |
20120262353 | SMALL BROADBAND LOOP ANTENNA FOR NEAR FIELD APPLICATIONS - A method and apparatus for providing a broadband near field of an antenna are disclosed. A small broadband loop antenna may include a printed circuit board (PCB) substrate with multiple layers. Printed on the PCB substrate are dual loops sharing a same driver circuit, an impedance matching network, a primary ground layer and a conductive layer. A shorting via connects the dual loops to a ground plane. The antenna may be tuned to a desired operating frequency by adjusting parameters of the loop, such as the position of the shorting via. | 10-18-2012 |
20130181875 | NFC ANTENNA WITH INTERLEAVED COILS - An antenna circuit for near-field communications includes a planar active winding, connected between a first and a second access terminal; an auxiliary winding coplanar with the active winding and connected by a first end to the first access terminal; and a tuning capacitor connected to the second end of the auxiliary winding. The turns of the active and auxiliary windings are interleaved. | 07-18-2013 |
20130307740 | LOOP ANTENNA WITH SWITCHABLE FEEDING AND GROUNDING POINTS - An active differential antenna is described that provides for improved performance for wireless communication systems across a wide set of use cases and environments. A balanced antenna structure along with switch assembly provides the differential mode radiation which results in minimal coupling to the components and items in the near field of the antenna. This results in an efficient antenna that is well isolated from the local environment of the antenna. The switch assembly is configured to switch the feed and ground connections of the differential design when needed to provide similar antenna performance for both “against head left” and “against head right” use cases for a cellular handset application for example. An active component or circuit can be integrated or coupled to the antenna design to provide the capability to dynamically balance the antenna to maintain pattern symmetry and efficiency. | 11-21-2013 |
20130328735 | VARIABLE CAPACITANCE CAPACITOR ELEMENT - A variable capacitance capacitor element according to an embodiment of the present invention comprises: a supporting substrate; a first electrode layer provided on the supporting substrate; a second electrode layer provided opposite to the first electrode layer; and a dielectric layer positioned between the first electrode layer and the second electrode layer. In accordance with an aspect, a main component of the dielectric layer is represented by a composition formula Ba | 12-12-2013 |
20130335281 | WIRELESS COMMUNICATION DEVICE - A wireless communication device includes a wireless IC device, a multilayer substrate including a stack of a plurality of dielectric layers, a resonant circuit that is connected to the wireless IC device and that includes a capacitance element provided in the multilayer substrate and an inductance element provided outside the multilayer substrate, and a radiation conductor connected to the resonant circuit. | 12-19-2013 |
20140132465 | Tunable Dual Loop Antenna System - An apparatus comprising a first antenna, a second antenna, wherein the first antenna and the second antenna comprise a common conductor, a variable load connected between the common conductor and a ground connection, wherein an impedance of the variable load is variable, and wherein an operating frequency of the first antenna and the second antenna depends on the impedance, and a selection switch coupled to the first antenna and the second antenna, wherein the selection switch is configured to activate the first antenna and deactivate the second antenna in a first state, and wherein the selection switch is configured to activate the second antenna and deactivate the first antenna in a second state. | 05-15-2014 |
20150372395 | NEAR-FIELD GRADIENT PROBE FOR THE SUPPRESSION OF RADIO INTERFERENCE - An antenna system is provided comprising first, second, and third loop antennas, each antenna having a respective loop area and spaced apart from the other antennas. The first and third antennas are configured and driven to form a first independent balanced feed point that is substantially isolated from the second antenna, which is configured to be driven from a second balanced feed point. A sum of the first and second respective loop areas, at a sum port in operable communication with the first and second balanced feed points, is substantially equivalent to the third respective loop area. An automatic control system is configured to automatically and independently adjust, via the balanced feed points, at least one of amplitude and phase for at least one of the three loop antennas, to help to substantially maximize suppression of RFI for a sum of signals from the first and second balanced feed points. | 12-24-2015 |
20160049730 | VARIABLE CAPACITANCE DEVICE AND ANTENNA DEVICE - The variable capacitance device includes one or more of directional elements inserted between the third and fourth terminals that allow current to pass only in prescribed directions, such that a diagram formed of current paths from the third terminal to the fourth terminal for the plurality of third-terminal side resistors and the plurality of fourth-terminal side resistors when the third terminal is biased higher than the fourth terminal is line-symmetric to a diagram formed of current paths from the fourth terminal to the third terminal for the plurality of third-terminal side resistors and the plurality of fourth-terminal side resistors when the fourth terminal is biased higher than the third terminal, with respect to the serial chain of variable capacitance elements between the first and second terminals. | 02-18-2016 |
20160181697 | Low-Profile Loop Antenna | 06-23-2016 |
20160254599 | VARIABLE CAPACITANCE DEVICE AND COMMUNICATION APPARATUS | 09-01-2016 |
20180026373 | CLOSED LOOP TUNING OPERATION WITH ANTENNA SWITCHING | 01-25-2018 |