Abstract: A mono-band planar inverted F antenna (PIFA) structure comprises a planar radiating element having a first area, and a ground plane having a second area that is substantially parallel to the radiating element first area. An electrically conductive first line is coupled to the radiating element at a first contact located at an edge on a side of the radiating element. The first line is also coupled to the ground plane. An electrically conductive second line is coupled to the radiating element at second and third contacts located along the same side as the first line, but at different locations on the edge than the first contact. Useable bandwidth of the PIFA is increased by using multiple contact locations to couple the conductive second line to the radiating element. The first and second lines are adapted to couple to a desired impedance, e.g., 50 ohms, at frequencies of operation of the PIFA.

Abstract: An antenna which can be operated in a number of frequency bands and has at least one part which encloses an area and at least one part which does not enclose an area, with the at least two parts including a single conductor part being connected in series with one another, and the at least two parts interacting with one another in such a manner that the antenna has at least two resonant frequencies in a definable position, and with each at the same time having a wide bandwidth.

Abstract: An antenna which can be operated in a number of frequency bands and has at least one part which encloses an area and at least one part which does not enclose an area, with the at least two parts including a single conductor part being connected in series with one another, and the at least two parts interacting with one another in such a manner that the antenna has at least two resonant frequencies in a definable position, and with each at the same time having a wide bandwidth.

Abstract: A system and method for sensing the proximity of an electronic device, in particular, a radio frequency mobile communication device such as a mobile telephone, wireless modem equipped portable computer, or the like to a body employs an antenna capable of altering its impedance for changing the amount of radio frequency electromagnetic energy reflected by the antenna when the antenna is in proximity to the body. The radio frequency electromagnetic energy reflected by the antenna is measured and used for determining proximity of the antenna to the body.

Abstract: A system and method for reducing the Specific Absorption Rate (SAR) of a mobile communication device employs a sensor assembly for sensing when the mobile communication device is in proximity to a body such as a human body, animal body, or the like. The average power of the radio frequency electromagnetic energy radiated by the mobile communication device may then be reduced only when necessary so that the S AR value for the device is maintained below a predetermined acceptable level.

Abstract: An antenna includes first and second convex-curved antenna elements, which are connected in series via webs extending in a longitudinal direction of the antenna, such that they form a helical configuration. A further antenna element may extend parallel to the helical configuration. The antenna can be stamped from a single metal part, can be bent into a desired shape, and is particularly suitable for multiband applications.

Abstract: An antenna includes first and second convex-curved antenna elements, which are connected in series via webs extending in a longitudinal direction of the antenna, such that they form a helical configuration. A further antenna element may extend parallel to the helical configuration. The antenna can be stamped from a single metal part, can be bent into a desired shape, and is particularly suitable for multiband applications.