摘要:
Methods and apparatus are provided for adjusting the electromagnetic fields produced by telephones or other mobile devices capable of wireless communication. A wireless communication device includes a substrate having a ground plane. An antenna is coupled to the ground plane, and electrical currents are produced in the ground plane during operation of the antenna. A switchable counterpoise circuit that includes a conducting element and an inductor in series is provided on the substrate. The switchable counterpoise is selectively coupled to the ground plane based upon an operating mode of the wireless communications device, thereby adjusting the electrical currents flowing in the ground plane when the counterpoise is active. The changes in the ground plane currents can produce adjustments in the electromagnetic fields produced by the device, thereby improving hearing aid compatibility (HAC) of the device.
摘要:
The present disclosure relates to compact, dual-mode ultra high frequency (UHF) radio frequency identification (RFID) reader antenna systems and methods capable of supporting both long range and short range applications. The present invention includes a dual-mode antenna design, a dual-mode RFID reader utilizing the dual-mode antenna design, and an associated usage method. The dual-mode antenna design may include a patch operating mode for long range applications and a slot operating mode for short range applications. Additionally, the dual-mode antenna design may include mechanisms to improve the patch operating mode bandwidth, circular polarization in the patch operating mode, and dual polarization in the slot operation mode.
摘要:
Methods and apparatus are provided for adjusting the electromagnetic fields produced by telephones or other mobile devices capable of wireless communication. A wireless communication device includes a substrate having a ground plane. An antenna is coupled to the ground plane, and electrical currents are produced in the ground plane during operation of the antenna. A switchable counterpoise circuit that includes a conducting element and an inductor in series is provided on the substrate. The switchable counterpoise is selectively coupled to the ground plane based upon an operating mode of the wireless communications device, thereby adjusting the electrical currents flowing in the ground plane when the counterpoise is active. The changes in the ground plane currents can produce adjustments in the electromagnetic fields produced by the device, thereby improving hearing aid compatibility (HAC) of the device.
摘要:
A circular polarized signal receiving antenna including an active element having first and second ends separated by a gap, a dimension of the active element, between the first and second ends thereof, corresponding to approximately one wavelength of a resonant operating frequency of the antenna. A feed-point is coupled to the active element, wherein the feed-point is located approximately one-quarter of the wavelength from the first end of the active element and approximately three-quarters of the wavelength from the second end of the active element. In one embodiment, the feed-point is coupled to the active element.
摘要:
The invention is directed to compounds of formula (I) wherein X is O or NH; R′ is a hydrocarbon chain; R3 and R4 are hydrogen, OH or a monosaccharide; R5 is hydrogen or a monosaccharide; Q′ is optionally present and may be a C1-10 hydrocarbon; X′ is optionally present and may be O, S or NR8; and Q3 may be a hydrocarbon or hydrogen. The invention is also directed to the use of the compounds for treating cancer, infectious diseases and autoimmune diseases. The invention is also directed to syntheses of the compounds of formula (I).
摘要翻译:本发明涉及其中X为O或NH的式(I)化合物; R'是烃链; R 3和R 4是氢,OH或单糖; R 5是氢或单糖; Q'任选存在,并且可以是C 1-10烃; X'任选存在,并且可以是O,S或NR 8; 和Q 3可以是烃或氢。 本发明还涉及该化合物用于治疗癌症,感染性疾病和自身免疫性疾病的用途。 本发明还涉及式(I)化合物的合成。
摘要:
A device including a battery, a wireless transceiver, and a battery cover. The battery cover is adapted to retain the battery in a desired position. The battery cover is further adapted to act as a first antenna in communication with the wireless transceiver for sending and receiving signals in a first frequency band.
摘要:
A communication device (100) is described herein. The device can include a first substrate (135) that can contribute to an electrical length of the communication device, a second substrate (140) that can contribute to the electrical length of the communication device and an inductive flexible circuit (145) that can be coupled to the first substrate and the second substrate. The inductive flexible circuit can transfer signals between the first and second substrates and can lengthen a first portion of the electrical length (EL1) of the communication device to a fractional wavelength of interest.
摘要:
A circular polarized signal receiving antenna (100) including an active element having first and second ends separated by a gap, a dimension of the active element, between the first and second ends thereof, corresponding to approximately one wavelength of a resonant operating frequency of the antenna. A feed-point is coupled to the active element, wherein the feed-point is located approximately one-quarter of the wavelength from the first end of the active element and approximately three-quarters of the wavelength from the second end of the active element. In one embodiment, the feed-point is reactively coupled to the active element.
摘要:
A portable communication device (100) for reception of communication signals and a method (500) for tuning an antenna assembly (132) of the portable communication device (100) are provided. The antenna assembly (132) includes an antenna element (136) and a speaker assembly (124) with a metal element. The antenna element (136) is coupleable to the metal element of the speaker assembly (132) to provide increased metallization for generation of an antenna length for reception of desired communication signals. The method (500) for tuning the antenna assembly includes coupling (508) the antenna element (136) to the metal element of the speaker assembly (124), thereby providing the increased metallization to tune the antenna length of the antenna assembly (132) for reception of the communication signals within a predetermined frequency range.