Abstract:
Low-profile, compact embedded multi-mode antenna designs are provided for use with computing devices, such as laptop computers, which enable ease of integration within computing devices with limited space, while providing suitable antenna characteristics (e.g., impedance matching and radiation efficiency) over an operating bandwidth of about.8 GHz to about 11 GHz.
Abstract:
PROBLEM TO BE SOLVED: To provide a cordless modem including a pair of radio units interfacing to a standard data/fax modem in order that the user of a personal computer can connect to a telephone line by radio. SOLUTION: One of the pair of the radio units 32 and 34 is set to be a remote unit 32 interfacing to a modem housed in a PC(personal computer) and the other is set to be a base station unit 34 connected to a standard wall telephone jack. By this solving way, a user obtains the convenience and freedom of using the PC, a lap top, a personal digital assistant(PDA), etc., within the range of 100 to 200m from the telephone jack without the interference of a code. When a signal intensity between one pair of the radio units 32 and 34 is not more than a prescribed threshold value, an alarm on the remote unit informs the user of it.
Abstract:
PROBLEM TO BE SOLVED: To obtain an automatic multi-speed wireless/cable computer network by establishing communications between a master computer and other equipment connected with an AC power network or radio equipment so as to control the other equipment through the master computer. SOLUTION: RF fields 15 are generated around a house by an AC power network 14 and radio, both of which exist inside/outside of in-house environment, by means of an RF network established by a network box 16. Once equipment enters the range of the field 15 by applying this field 15, it is automatically registered in the network and all of internal information concerning the equipment is sent to the master computer 12 to receive operation according to information. This computer 12 is connected to a telephone line through a modem 20 and the box 16 is connected to the telephone line from the house through an RJ-11 type connector.
Abstract:
PROBLEM TO BE SOLVED: To improve the reliability of data transmission by scanning channels of radio communication, recording a channel having interference in an interval in a history table, determining the best channel having the least interference over the expected number of intervals, and updating it periodically. SOLUTION: A cordless or radio communication system 500 generates the history table having columns assigned to plural channels and rows assigned to intervals between a remote station 510 and a base station 508. The system 500 scans plural channels and a receive signal intensity display means which outputs a voltage proportional to interference determines a channel having interference in a given interval. The system 500 determines the best channel for communication having the least interference over the expected number of intervals in the history table wherein the decision is recorded and periodically updates it. Consequently, the system which is more robust and reliable can be obtained.
Abstract:
Antennas are provided which are constructed using one or more wires as radiating elements attached to a substrate or chip, wherein wire bonding methods can be used to attach and form loop profiles for the wires. The antennas can be integrally packaged with IC chips (e.g., IC transceivers, receivers, transmitters, etc.) to build integrated wireless or RF (radio frequency) communications systems. For example, an exemplary antenna device (20) comprises a substrate (21) having a dipole antenna comprising a first wire element (22) connected to and supported by metallic pads (23) and (24), and a second wire element (25) connected to and supported by metallic pads (26) and (27). The metallic pads (23) and (26) are contact pads to an integrated antenna feed network connected to an RF circuit, for example. The metallic pads (24) and (27) are termination pads for attaching and supporting the end (non-fed) portions of respective wire elements (22) and (25). Optional metallic shielding elements (28) and (29) are formed on the substrate/chip (21) under respective wire elements (22) and (25) to prevent electromagnetic fields from penetrating into the substrate (21) thereby reducing loss and improving the antenna efficiency.
Abstract:
A method and apparatus for implementing a wireless/wired computer network in an indoor environment with inherent reliability is disclosed. A master network box connected to an AC power network and a master computer generates an RF field around the computer, the home, and AC power network. The integration and implementation of additional devices to the established network is made through additional appliance boxes. One introduced into the generated RF field, or connected to the AC power network, the additional device is automatically and seamlessly registered and configured into the network without requiring any user intervention. The network is capable of multiple modulation schemes for providing robust wirred or wireless communication for various devices which have different power and data rates. The programming of the master computer enables the automated registration of additional devices, and can provide superior control over the devices connected to the network, either via the AC power network, or via RF wireless transmission through the multiple modulation schemes.
Abstract:
Multiband antennas are provided that can be embedded in computing devices such as portable laptop computers and cellular phones, for example, to provide efficient wireless communication in multiple frequency bands. Exemplary embodiments include monopole multiband antennas, dipole multiband antennas, and inverted-F antennas, having one or more coupled and/or branch radiating elements, for providing multiband operation in two or more frequency bands. For example, an exemplary multiband antenna (100) includes a ground element (101), a monopole radiator (102) connected to the ground element (101) and having a feed tab (103) extending therefrom, a coupled radiator (104) connected to the ground element (101) and a branch radiator (105) that is connected to the monopole radiator (102). The antenna elements can be formed from thin sheet metal, such as copper or brass. The antenna (100) can be fed using a coaxial cable, for example, wherein a center conductor is electrically connected to feed element (103) via a solder connection and wherein in the outer conductor (ground) of the coaxial cable is electrically connected to the ground element (101) via a solder connection.
Abstract:
Antennas are provided which are constructed using one or more wires as radiating elements attached to a substrate or chip, wherein wire bonding methods can be used to attach and form loop profiles for the wires. The antennas can be integrally packaged with IC chips (e.g., IC transceivers, receivers, transmitters, etc.) to build integrated wireless or RF (radio frequency) communications systems.
Abstract:
A CORDLESS MODEM COMPRISES A RADIO PAIR INTERFACED TO A STANDARD DATA/FAX MODEM (36) WHICH ALLOWS A USER OF A PERSONAL COMPUTER (30) TO WIRELESSLY CONNECT TO A TELEPHONE LINE. ONE END OF THE RADIO PAIR IS A REMOTE UNIT (32) INTERFACED TO THE MODEM CONTAINED WITHIN THE PC WHILE THE OTHER END IS A BASE UNIT (34) CONNECTED TO A STANDARD TELEPHONE WALL JACK (40, 90). 'THIS ARRANGEMENT ALLOWS THE USER THE CONVENIENCE AND FREEDOM OF USING A PC, LAPTOP, PERSONAL DIGITAL ASSISTANT, ETC., WITHIN SEVERAL HUNDRED FEET OF A PHONE JACK WITHOUT BEING ENCUMBERED BY A CORD. A WARNING ALARM (61) ON THE REMOTE UNIT INFORMS THE USER WHEN THE SIGNAL STRENGTH BETWEEN THE RADIO PAIR IS BELOW A THRESHOLD VALUE. ADDITIONALLY, THE BASE UNIT MAY BE EQUIPPED WITH TWO SPATIALLY SEPARATED ANTENNAS (70, 70') TO HELP MITIGATE THE EFFECTS OF SIGNAL FADING.