592results about "Pivotable antennas" patented technology

Multiple input multiple output (MIMO) systems are able to provide wireless communications at increased data rates. These systems involve using a plurality of antennas on both the transmitter and receiver and the problem of how to accommodate such structures in user terminals, which are often required to be hand held then arises. An antenna arrangement which is suitable for MIMO communications and which can be incorporated into a user terminal such as a personal digital assistant (PDA) is described. A pair of co-polarised umbrella monopoles and a slot antenna are incorporated into a flap which extends at approximately 90° to the body of the PDA. A fourth monopole is mounted and protrudes from the PDA itself.

A stand device capable of providing different folding angles includes a base member, a sliding member disposed to the base member so that a linear reciprocal motion is possible, a stand member having a specific length and fastened to one end of the sliding member in a rotatable manner, and a link member, of which one end is hinge-connected to a proper place in the stand member and the other end is hinge-connected to the base member, for holding the stand member, wherein an opening angle of the stand member varies depending on a linear reciprocation level of the sliding member.

Provides an antenna for a radio telephone whereby, in a state wherein the rod-shaped antenna is extended to outside the case of the radio telephone, the effects of the human body are negligible and emission of radio waves at an angle close to the horizontal direction is possible, and in a state wherein the rod-shaped antenna is retracted within the case, no unwanted radiation is produced. For this purpose, a helical antenna 20 having an electrical length of lambd / 4 and a rod-shaped antenna 10 extendable and retractable with respect to the case through the hollow central portion of the helical antenna 20 and having an electrical length of about 3lambd / 8 and inductive reactance are electrically coupled by means of an electrostatic coupling portion 30 having capacitive reactance such that, in the state wherein the rod-shaped antenna 10 is extended from the case 50, the inductive reactance of the rod-shaped antenna 10 is cancelled out. The length of the bottom portion 12a of the connecting member 12 is set to a length such that when the rod-shaped antenna 10 is retracted within the case 50, the bottom portion 12a of the connecting member 12 passes through the helical coil 12 over the entire length thereof, severing electrical coupling between the helical antenna 20 and the rod-shaped antenna 10.

An antenna system (200,400,500,600) for use within a communication device (100) is disclosed. The communication device (100) including a signal source (260,425,635), a main housing (105) and a movable flip housing (110) moveably coupled to the main housing (105) through a hinge assembly (125). The hinge assembly (125) being comprised of a hinge shaft, a first knuckle (805) coupled to one side of the hinge shaft, and a second knuckle (810) coupled to an opposing side of the hinge shaft. The antenna system (200,400,500,600) includes at least one of the knuckles of the hinge assembly (125).

A wireless communications card for use with an electronic device includes a frame and an antenna system. The frame is configured for removable installation in the electronic device. The antenna system includes first and second antennas each integral with the frame. At least one of the first and second antennas is selectively movable relative to the other between a first antenna configuration and a second antenna configuration.