Abstract: An oriented PIFA-type apparatus for reducing hearing aid radio frequency (RF) interference including a directional multi-band and/or single band antenna for use with PWDs such as digital cellphones is disclosed. The apparatus greatly reduces or eliminates the audio noise induced in hearing aids by the PWDs and allows operation of a hearing aid during PWD operation. In operation, the apparatus may be provided on the PWD side away from the user's head. The apparatus may be integrated into the PWB during its manufacture or provided as an after market assembly for a PWD that has a port for connection of an external antenna. The apparatus provides for improved front-to-back ratio as compared to antennas currently in use on PWD's, and therefore also reduces SAR (specific absorption rate), the level of RF energy received into the head by a PWD.

Abstract: The present invention relates to a structure of an antenna and its shielding structure for a mobile phone which may significantly reduce the hazardous electromagnetic wave transmitted to the user's body. The present invention arranges a monopole antenna inside of the mobile phone housing, and installs an electromagnetic wave absorber between the antenna and the circuit board. The electromagnetic wave absorber can absorb the electromagnetic wave reflected form conductive plate constituting the circuit board. Thus, the adverse effect of the reflected electromagnetic wave to the performance of antenna is prevented and the amount of the electromagnetic wave to which the users is exposed can be significantly reduced as well.

Abstract: The present invention provides a wireless communication device. The wireless communication device includes a mainboard and a connecting member, in which the mainboard includes a mainboard body and a mainboard end part which is connected to the connecting member; the side of the mainboard body away from the mainboard end part is connected to an antenna; and a matching network is arranged between the mainboard body and the mainboard end part and configured to control the distribution of the surface current induced by the antenna on the mainboard. By arranging the matching network between the mainboard body and the mainboard end part of the wireless communication device and changing, through the matching network, the distribution of the surface current induced by the antenna, the embodiments of the present invention may simultaneously guarantee the SAR performance and the wireless performance of a wireless communication terminal and improve the user experience.

Abstract: An apparatus for reducing hearing aid radio frequency (RF) interference including a directional multi-band and/or single band antenna for use with PWDs such as digital cellphones is disclosed. The apparatus greatly reduces or eliminates the audio noise induced in hearing aids by the PWDs and allows operation of a hearing aid during PWD operation. In operation, the apparatus may be provided on the PWD side away from the user's head. The apparatus may be integrated into the PWB during its manufacture or provided as an after market assembly for a PWD that has a port for connection of an external antenna. The apparatus provides for improved front-to-back ratio as compared to antennas currently in use on PWD's, and therefore also reduces SAR (specific absorption rate), the level of RF energy received into the head by a PWD.

Abstract: A retractable/extendable antenna unit having a conductive tube for a mobile communication terminal with improved communication performance by means of an elongated rod antenna of a whip antenna in its extended position. The antenna unit has an antenna housing extending from a main body of the terminal, provided with an helical antenna; a whip antenna disposed retractably or extendably with respect to the antenna housing, having in its one end an insulator having a length shorter than that of the helical antenna and in its other end a rod antenna; and a conductive tube disposed in a longitudinal direction of the main body, for receiving the rod antenna. The insulator is positioned within the helical antenna when the whip antenna is fully retracted into the antenna housing. The antenna unit improves antenna performance and decreases SAR.

Abstract: A retractable/extendable antenna unit having a conductive tube for a mobile communication terminal with improved communication performance by means of an elongated rod antenna of a whip antenna in its extended position. The antenna unit has an antenna housing extending from a main body of the terminal, provided with an helical antenna; a whip antenna disposed retractably or extendably with respect to the antenna housing, having in its one end an insulator having a length shorter than that of the helical antenna and in its other end a rod antenna; and a conductive tube disposed in a longitudinal direction of the main body, for receiving the rod antenna. The insulator is positioned within the helical antenna when the whip antenna is fully retracted into the antenna housing. The antenna unit improves antenna performance and decreases SAR.

Abstract: An object of the present invention is to provide an antenna device for a radio apparatus in which the amount of energy (SAR) absorbed by a head of a human body can be reduced without lowering the power of radio waves transmitted during a call. There is provided a board 108 serving as a base plate of an antenna element, an antenna element 102 disposed in a longitudinally end portion of the board 108 through a feeding portion 107, a conductor plate 109 disposed substantially in parallel with a main surface of the board 108 and disposed on the opposite side to a surface having a sound hole of a receiver portion, and a plurality of short-circuit conductors 110 disposed on a lower end portion of the conductor plate 109. The conductor plate 109 is short-circuited to a lower end portion of the board 108 through the short-circuit conductors 110.

Abstract: A mobile wireless communications device may include a portable housing and wireless transceiver circuitry carried by the portable housing. The mobile wireless communications device may also include an antenna carried by the portable housing and coupled to the wireless transceiver circuitry, and a light source carried by the portable housing. The device may further include a keyboard assembly carried by the portable housing including a light guide coupled to the light source and having input key receiving openings therein, and a mask carried by the light guide and having input key receiving openings. The mask may include spaced apart electrically conductive elongate members positioned relative to the antenna to reduce a Specific Absorption Rate value for the mobile wireless communications device.

Abstract: An object of the present invention is to provide an antenna device for a radio apparatus in which the amount of energy (SAR) absorbed by a head of a human body can be reduced without lowering the power of radio waves transmitted during a call. There is provided a board 108 serving as a base plate of an antenna element, an antenna element 102 disposed in a longitudinally end portion of the board 108 through a feeding portion 107, a conductor plate 109 disposed substantially in parallel with a main surface of the board 108 and disposed on the opposite side to a surface having a sound hole of a receiver portion, and a plurality of short-circuit conductors 110 disposed on a lower end portion of the conductor plate 109. The conductor plate 109 is short-circuited to a lower end portion of the board 108 through the short-circuit conductors 110.

Abstract: An antenna designing method and a data single board of a wireless terminal are disclosed. The method provided by the embodiments of the present invention includes: dividing a semi-closed area without other metal wirings on a data card single board of the wireless terminal; and arranging an antenna wiring and a metal coupling piece in the semi-closed area, where the antenna wiring and the metal coupling piece are parallel and overlap one another, a gap exists between the metal coupling piece and the data card single board, and the metal coupling piece is coupled with the data card single board via the gap. An embodiment of the present invention also provides a data card single board of a wireless terminal. According to the embodiments of the present invention, a Specific Absorption Rate (SAR) value of the antenna is reduced, and a working bandwidth of a broadband is realized.

Abstract: The present invention relates to an antenna arrangement for a portable radio communication device including a casing, said casing housing a generally planar printed circuit (1) board defining a ground plane device. The antenna arrangement comprises: a first antenna element (4; 5) for transmission of radio signals mountable within said casing and connectable to said printed circuit board; and a second antenna element (7; 9; 11) for reception of radio signals mountable within said casing and connectable to said printed circuit board. The first antenna element, when mounted above said printed circuit board, has a projection on said printed circuit board, which is perpendicular to a plane parallel to said generally planar printed circuit board, wherein said first antenna element has a size and is positioned such that said printed circuit board extends, in all directions of said plane, farther than the projection, at least by a distance of one millimeter.

Abstract: A subject of the present invention is to provide an antenna unit and a portable radio device capable of attaining a wider bandwidth and a lower SAR. In the present invention, an antenna element (12) that has an effective length corresponding to a half wavelength of a transmitting frequency and a parasitic element (13) that has an effective length corresponding to a half wavelength of a receiving frequency are provided, an antenna current is induced in the antenna element (12) at the transmitting frequency upon transmitting a radio wave in a predetermined transmitting frequency band, and another antenna current is induced in the parasitic element (13) by a spatial coupling between the antenna element (12) and the parasitic element (13) at the receiving frequency upon receiving the radio wave in a predetermined receiving frequency band, whereby peak points in an antenna current distribution are scattered into two points.

Abstract: Disclosed is a radio communication terminal having an antenna device, which is capable of feeding power to an internal antenna using a simple configuration while achieving a reduction in SAR, by using a dipole antenna as the internal antenna. In the antenna device, a power feeding circuit and a primary radiation element are mounted to a printed circuit board (PCB). Transmission power from a transmitting/receiving circuit is fed to the primary radiation element via a coaxial cable by the power feeding circuit. The dipole antenna is attached to an inner surface, outer surface, or recessed portion of the case of the terminal in such a fashion that it faces the primary radiation element while being spaced apart from the primary radiation element. A speaker is attached to a surface of the PCB opposite to the PCB surface to which the primary radiation element is mounted.

Abstract: A method is provided for reducing near-field radiation and specific absorption rate values in a communications device that includes a multimode antenna structure transmitting and receiving electromagnetic signals and circuitry for processing signals communicated to and from the antenna structure. The method includes adjusting the relative phase between signals fed to neighboring antenna ports of the antenna structure such that a signal fed to the one antenna port has a different phase than a signal fed to the neighboring antenna port to provide antenna pattern control and to increase gain in a selected direction toward a receive point. The method features using a transmit power lower than the transmit power used in a non-pattern control operation of the antenna structure such that the communications device obtains generally equivalent wireless link performance with the receive point using reduced transmit power compared to the non-pattern control operation, thereby reducing the specific absorption rate.

Abstract: The present invention relates to an antenna arrangement for a portable radio communication device including a casing, said casing housing a generally planar printed circuit (1) board defining a ground plane device. The antenna arrangement comprises: a first antenna element (4; 5) for transmission of radio signals mountable within said casing and connectable to said printed circuit board; and a second antenna element (7; 9; 11) for reception of radio signals mountable within said casing and connectable to said printed circuit board. The first antenna element, when mounted above said printed circuit board, has a projection on said printed circuit board, which is perpendicular to a plane parallel to said generally planar printed circuit board, wherein said first antenna element has a size and is positioned such that said printed circuit board extends, in all directions of said plane, farther than the projection, at least by a distance of one millimeter.

Abstract: Disclosed is a radio communication terminal having an antenna device, which is capable of feeding power to an internal antenna using a simple configuration while achieving a reduction in SAR, by using a dipole antenna as the internal antenna. In the antenna device, a power feeding circuit and a primary radiation element are mounted to a printed circuit board (PCB). Transmission power from a transmitting/receiving circuit is fed to the primary radiation element via a coaxial cable by the power feeding circuit. The dipole antenna is attached to an inner surface, outer surface, or recessed portion of the case of the terminal in such a fashion that it faces the primary radiation element while being spaced apart from the primary radiation element. A speaker is attached to a surface of the PCB opposite to the PCB surface to which the primary radiation element is mounted.

Abstract: Antenna structures and methods of operating the same of an electronic device are described. One apparatus includes a radio frequency (RF) including a surface-current dispersing circuit and an antenna structure coupled to the RF feed at a feeding point and coupled to a ground plane at a grounding point. The antenna structure comprises an even multiple of quarter-wavelength elements with a first element coupled to the feeding point and a second element coupled to the grounding point and the grounding point is located at a specified distance from the feeding point. Surface currents, generated as a result of the RF signals being applied to the RF feed at the feeding point, create a first hot spot of an even multiple of hot spots of magnetic field at the feeding point. The surface-current dispersing circuit and the ground point disperse a portion of the surface currents at the feeding point towards the grounding point to create other hot spots of the even multiple of hot spots.

Abstract: A retractable whip antenna incorporating a matching base loading helix for use in mobile communications devices is disclosed. The antenna functions without the use of a matching circuit since selection of the radiating elements provides a constant input impedance to the transceiver circuitry. The resulting antenna provides excellent gain over the PCS frequency band, low SAR values, circuit design flexibility and low cost. In a preferred embodiment, the retractable whip is comprised of a radiating element with an electrical length of 1/2 wavelength and having a first end attached to a conductive spring contact. The base loading helix comprises a radiating helical element with an electrical length of 1/4 wavelength and having a first end connected to a mobile transceiver circuit and a second end comprising a conductive capturing coil. The radiating whip element is constrained within the coil of the helical element and is freely moveable to an extended or a retracted position.

Abstract: A compact single or multiple band antenna assembly for wireless communications devices. One multi-band embodiment includes a high frequency portion and a low frequency portion, both fed at a common point by a single feed line. Both portions may be formed as a single stamped metal part or metallized plastic part. The overall size is suitable for integration within a wireless device such as a cell phone. The low frequency portion consists of two resonant sections which are stagger tuned to achieve a wide resonant bandwidth, thus allowing greater tolerance for manufacturing variations and temperature than a single resonant section, and is useful for single band antennas as well as multi-band antennas where it may be used to enhance bandwidth for both sections of a dual band antenna as well. The resonant sections for single or multi-band antennas operate in conjunction with a second planar conductor, which may be provided by the ground trace portion of the printed wiring board of a wireless communications device.

Abstract: The present disclosure provides a multi-antenna mobile phone data card and method for reducing a specific absorption rate, where the data card includes: a radio frequency (RF) substrate, antennas configured to transmit and receive signals, and a feed source, connected between the RF substrate and the antennas, configured to excite the antennas, the RF substrate has a rectangular shape, and the feed source is arranged at a first corner of the RF substrate, a first hollow portion is arranged at a second corner which is adjacent to the first corner and is located on a short side of the RF substrate on which the first corner is located, the first hollow portion is provided with a first metal strip, the first metal strip has an end connected with the short side, and another end as a free end, a first electrical length formed from the feed source to the free end of the first metal strip is equal to a second electrical length formed from the feed source to another short side along a long side on which the first corn