Abstract: A modular personal device system, in which the system has two parts: a core module and a shell module. The overall functionality available to the combined system is divided between the core module and the shell module such that a single core module is operable with a plurality of different types of shell modules.

Abstract: A portable terminal apparatus that can automatically acquire a right to talk is provided. The portable terminal apparatus comprises storage means 35 in which the setting of automatic holding of a right to talk is stored and held. In response to detection of depression of a right to talk acquisition key 51 prepared in advance, a CPU 10 references the setting of the automatic holding of a right to talk stored in the storage means 35 and, if the automatic holding of a right to talk is effective, enters the right to talk acquisition wait state, tries to acquire the right to talk at a predetermined interval, and repeats this operation until the right to talk is successfully acquired. Once acquired, the right to talk is held until a right to talk automatic holding time stored in the storage means elapses.

Abstract: Disclosed herein is an actuator module for wireless communication terminals. The actuator module comprises at least one actuator, an upper base for receiving the actuator on a lower surface thereof, a lower base assembled to the upper base while defining an inner space of a predetermined volume with respect to the upper base, and a connecting member having a body fixed to an upper surface of the lower base. One end of the body is exposed from a lower surface of the lower base, and the other end thereof is electrically connected with the actuator when the upper and lower bases are coupled to each other. With the construction, electrical connection between the actuator and a substrate can be conveniently obtained with reduced manufacturing costs thereof. In addition, assembly of the actuator and the substrate can be simplified via efficient use of the inner space of a terminal body.

Abstract: There is described a backscatter system comprised of a base station and of a completely passive transponder. The transponder is capable of reading out quantities from sensors and an energy stand-alone manner, of transmitting the readout quantities to the base station, and to carry out a runtime-based and thus highly precise distance measurement between a completely passive tag and base station. The power supply of the transponder ensues from the radio field emitted by the base station.

Abstract: A radio communication system having a plurality of mobile stations, at least one base station, and a control side apparatus connected to the base station. Each mobile station has a mode switching instruction reception unit for receiving an instruction for switching from a radio communication mode for performing a radio communication operation to a loudspeaker mode or a hot mic mode, a destination identifying information storage unit for storing information for identifying a communication apparatus which serves as a communication partner when the mode switching instruction reception unit receives the instruction for switching to the hot mic mode, and a destination identifying information transmission unit responsive to the received instruction for switching to the hot mic mode by the mode switching instruction reception unit for transmitting the information stored in the destination identifying information storage unit over the air.

Abstract: An apparatus and a method for providing improved character input displays in a mobile communication terminal. When the user inputs a first key, a first key number corresponding to the input key is displayed in an enlarged form on the display unit in the mobile communication terminal. Thereafter, if the user inputs a second key, then the second key number is displayed in the enlarged form of the preset magnification rate and the first key number is reduced to the original size on the display unit. The apparatus and the method enable user with poor vision to discern the last input key number from the preceding key numbers.

Abstract: A cellular phone includes a first case and a second case, which are connected in a foldable manner through a hinge. When the cellular phone is in a folded state, a second display unit displays an image with the side (upper side) closer to the hinge as the upper side. Accordingly, the user can hold the second case of the cellular phone in his/her hand regardless of whether the cellular phone is in a folded state or in an open state. The user can easily switch between a folded state and an open state with respect to the first case and the second case.

Abstract: A disposable radio communication device includes a body defining an enclosed chamber, a power source mounted in the chamber, an on-off switch mounted on the body and accessible from outside the body, a processor mounted in the chamber and powered by the power source, and a transceiver mounted in the chamber and in communication with the processor. A speaker is mounted in the chamber in communication with the processor. A microphone is mounted in the body and is in communication with the processor. The transceiver is adapted to receive sound signals from a remote unit and input the signals to the speaker for broadcast, and the microphone is adapted to receive sound signals from outside the body and input the received sound signals to the processor for transmittal by the transceiver to the remote unit.

Abstract: Disclosed herein is a receptacle for selectively conducting electric power. The receptacle contains a switch that is normally open to prevent the occurrence of electric shock. An optical prong detector is provided to determine whether both the hot and neutral prongs of a plug have been inserted into the receptacle. The receptacle provides conductance upon determination of insertion of a plug into the receptacle. Additional features include GFI detection, current detection heat detection warning lights, and an audible alarm. The receptacle includes communication abilities with remote devices to transmit data indicative of the state of the device.

Abstract: A wireless communication system from an IV medication infusion pump to a hospital information management system (HIMS) is disclosed. The system includes an IV pump having pump operation circuitry for monitoring pre-selected characteristics of pump operation indicative of IV administration of medication to a patient. A transmitter or transceiver is connected to the pump operation circuitry for receiving a wireless pump signal representing instructional data to the IV pump and for transmitting a wireless pump signal representing the pre-selected pump operation characteristics. The wireless pump transmitter or transceiver communicates with a hospital information management system (HIMS). The HIMS includes a receiver or transceiver capable of transmitting and receiving the pump signal representing the pump operation characteristics and also includes a computer processor capable of storing and displaying the pump operation characteristics that are represented by the received wireless pump signal.

Abstract: Disclosed is a portable terminal having replaceable accessory modules. An accessory module can be rigidly mounted using a frame of the portable terminal, and can be easily replaced with another module according to a user's selection to satisfy various consumer demands. The portable terminal includes a body, accessory modules which are selectively mounted to the body, for providing additional functions to the portable terminal, and a movable frame which is mounted to and slides along the body of the portable terminal to keep the selected accessory module fixed to the body of the portable terminal by enclosing the selected accessory module to be mounted to the body of the portable terminal, for preventing the selected accessory module from being separated from the body of the portable terminal.

Abstract: A wireless communication system and method for determination of the location of a location-incapable device of a decentralized wireless communication network. Upon receipt of location determination information, relevant to the location of the location-incapable device in the network and sufficient to perform a calculation of the location of the location-incapable device, a location-capable device of the network may calculate the location of the location-incapable device and make this information available to one or more devices of the network.

Abstract: A method and apparatus for operating a meter uniquely associated with a physical location are provided. The method includes monitoring a communication channel for a message from a remote device and identifying an initial message directed to the meter uniquely associated with the physical location, establishing a communication session with a data manager in response to the initial message from the remote device, receiving configuration information from the data manager, the configuration information associated with operation of the meter and uniquely associated with the physical location of the meter, and transmitting meter operating data to the data manager, wherein the meter is self-powered.

Abstract: A method of displaying information on a display of a handheld electronic device includes steps of determining a target area onscreen to be visually magnified and causing a shape-changing zone of the display to change shape in the target area to visually magnify information displayed in the target area. The array of shape-changing zones on the touch-sensitive display can be independently actuated to form a magnifying lens over any onscreen object of interest. For example, this lens can be used to magnify a selected portion of a map, a portion of text or a specific point of interest. The lens can be used to magnify a route displayed on a map, or simply to zoom in on the current location of the device as displayed onscreen.

Abstract: An employee tracking system is disclosed, in which processing, accessing or both within the system is determined according to the hierarchical structure of the underlying organization. Each employee is associated with a node in the organization, and access to employee-related data is based upon the node associated with the requester and the node of the employee being checked, as well as the type of data being requested. Employees may clock into and out of work using mobile devices that interface with the employee tracking system host computer.

Abstract: A mobile telephone comprising: an engine assembly comprising a display and a plurality of switches; and a flexible cover overlying, without an intermediate rigid cover, and snugly fitting the engine assembly and comprising an aperture aligned with the display and an integrated keypad, for user input, aligned with the plurality of switches.

Abstract: A device includes a first wireless transceiver adapted to communicate over a cellular network, a second wireless transceiver adapted to communicate over a local network separate from the cellular network, and a mechanism adapted to report movement information to a computer via the second wireless transceiver. The mechanism is optionally an optical sensor reporting relative position information. The device is operable as both a cellular communication device and a computer pointing device. A button of the device is adapted to operate as a mouse button, and optionally, in some modes, controls operation of the cellular communication device. The second wireless transceiver optionally uses Universal Serial Bus protocol. The device optionally transfers files via the second wireless transceiver. In some usage scenarios, the device and a separate wireless pointing device communicate with a same computer and are used to operate an application, such as a gaming application.

Abstract: A plurality of operation portions are arranged at a surface on a sub-display side of a cellular phone with a camera so that various kinds of setting, selection and control can be performed without opening the cellular phone in its folded state, and the cellular phone can achieve improved operability and convenience. Cellular phone includes a first display portion at a surface of a first body opposed to a second body in the folded state, and includes a second display portion, an image taking portion and a plurality of operation portions arranged at a rear surface of the first body remote from the first display portion.

Abstract: The present invention relates to a searching apparatus, especially an avalanche transceiver, including a receiving unit (22) for receiving transmission signals for locating a transmitter and a transmitting unit (20) for transmitting transmission signals, wherein at least a first (10) and a second transmitting antenna (12) are associated with at least the transmitting unit (20), which are disposed in the searching apparatus oriented in different spatial directions, wherein only one of the transmitting antennas (10; 12) is in operation in the transmission mode, wherein the searching apparatus further includes: at least one position sensor (28) adapted to determine a spatial position of the searching apparatus and to provide a position signal on its output, which is correlated with the spatial position; and a switching device (16) coupled to the at least one position sensor (28) for supplying the position signal on the one hand and to the at least one first (10) and second transmitting antenna (12) on the other

Abstract: A communication service equipment and a search and rescue terminal device for vessels that are set on board to provide radio communication service including at least one radio signal transmission and reception units, a modulation and demodulation unit, a location information receiving unit, a plurality of frequency conversion unit, signal processing units each connected to the frequency conversion unit, a main control unit, and control the signal processing unit.

Abstract: An electronic and transducer device can be attached, adhered, or otherwise embedded into or upon a removable oral appliance or other oral device to form a two-way communication assembly. In another embodiment, the device provides an electronic and transducer device that can be attached, adhered, or otherwise embedded into or upon a removable oral appliance or other oral device to form a medical tag containing patient identifiable information. Such an oral appliance may be a custom-made device fabricated from a thermal forming process utilizing a replicate model of a dental structure obtained by conventional dental impression methods. The electronic and transducer assembly may receive incoming sounds either directly or through a receiver to process and amplify the signals and transmit the processed sounds via a vibrating transducer element coupled to a tooth or other bone structure, such as the maxillary, mandibular, or palatine bone structure.

Abstract: A unified messaging interface and associated methods that enables mobile communication device users to initiate the creation of a message for a recipient without being required to explicitly specify the type of message that is to be created. The mobile communication device supports multiple message types, such as voice, text, and picture messages. The user begins providing message content to the communication device by, for example, speaking, entering text, or clicking a shutter of a camera. The unified messaging interface detects the nature of the content and creates a corresponding type of message. The user can indicate a desire to create and send a message by performing “one-click” action. The one-click action is an operation performed on the device that can be instantiated as a single button-press on the keypad; selection of a single soft key by depressing a button on the keypad or touching the screen of the device; or issuance of a single voice command.

Abstract: Briefly, some embodiments of the invention may provide devices, systems and methods for multi-profile wireless communication. For example, a wireless communication module may include first and second ports, and may be able to selectably operate in either a first mode of operation, in which said first port is used as an input port for incoming signals and said second port is used as an output port for outgoing signals, or a second mode of operation, in which said second port is used as an input port for incoming signals and said first port is used as an output port for outgoing signals.

Abstract: Apparatus for communication includes at least one RF receiver circuit, which is coupled to receive and downconvert first and second RF signals that are transmitted respectively over different, first and second wireless networks in accordance with different, first and second network protocols, so as to output first and second downconverted signals. A baseband processing circuit includes processing components that are coupled to receive and process the first and second downconverted signals so as to extract first and second data from the signals. The processing components have a first configuration for demodulating the first downconverted signals in accordance with the first network protocol and a second configuration for demodulating the second downconverted signals in accordance with the second network protocol.

Abstract: The present invention relates to a handheld electronic apparatus, which allows the user to photograph an object while watching an image of the object H on it display unit. A first case 1 having the display unit 5 and a second case 2 having a key input section 7 are connected in an openable and closable manner by means of a connecting shaft 120, which has a built-in image pick-up unit 121. When the first case 1 and the second case 2 are kept in an open state, the display unit 5 on the first case and the key input section 7 face in the same direction, and the image pick-up unit 121 faces in the opposite direction to a display screen of the display unit and the key input section. The user can photograph the object H, while reviewing the image of the object H displayed on the display unit 5.

Abstract: A portable telephone having an antenna for transmitting and/or receiving a wireless signal, a microphone for generating a sound signal corresponding to an input sound, a transmitting and receiving circuit for generating a wireless signal corresponding to the sound signal generated by the microphone to transmit the wireless signal through the antenna and generating a sound signal corresponding to the wireless signal received by the antenna, a receiver for outputting sound corresponding to the sound signal generated by the transmitting and receiving circuit, a shield case for surrounding and housing all or part of the transmitting and receiving circuit and being conductive, an electric wave absorber with one face in contact with a predetermined area of the shield case for absorbing an electric wave, and a conductive layer formed on another face of the electric wave absorber and electrically connected to the shield case.

Abstract: Disclosed is a mobile terminal having a round external speaker. The round external speaker can be easily and simply mounted on the mobile terminal without a separate mounting unit by inserting a mounting protrusion portion of the mobile terminal into a mounting groove portion.

Abstract: A telecommunications card comprising a cavity in which an antenna structure is movably mounted between a first position in which the antenna structure is substantially located within the cavity and a second position in which the antenna structure is extended from the cavity, the telecommunications card further comprising moving means for moving the antenna structure from the first position to the second position, the antenna structure comprising a slide portion and an antenna portion which are movably connected to each other, characterised in that the antenna structure further comprises erecting means for erecting the antenna portion from the second position to a third position suitable for wireless communication with a telecommunications network.

Abstract: A PC card is configured to provide wireless communication to a host device when disposed in a mated position with the host device, the PC card having an enclosure with a bottom surface. The PC card includes a transceiver, a controller in communication with the transceiver, and a modem in communication with the controller. The PC card also includes an antenna in which a high current region is established during communication, the high current region being raised above a feed plane coupled to the antenna.

Abstract: A system may include a buffer that is arranged and configured to receive an audio input signal and to buffer the audio input signal for a period of delay time, where the audio input signal includes one or more periods of silence and one or more periods of content and a processor that is arranged and configured to search the audio input signal for the periods of silence during the period of delay time. The system also may include a frequency modulation (FM) receiver that is arranged and configured to be enabled by the processor during the periods of silence to scan an FM spectrum for available frequencies for transmission and an FM transmitter that is arranged and configured to transmit the audio input signal on an FM frequency and to be disabled by the processor during the periods of silence.

Abstract: An apparatus to package an electronic device. The apparatus includes a composite plastic package that is durable to environmental conditions. In particular, a mold process to produce a plastic composite material package and support an electronic component inserted therein. At least one injection nozzle supplies a specified level of plastic composite material into the mold to produce a substantially hermetically sealed package. A multi-patch antenna provides increased receiver sensitivity. An inductive battery power option provides a user flexibility to charge a tracking device and communicate near-field signals and energy with a tracking monitoring station.

Abstract: The present invention includes a mobile device that is capable of storing media and optionally a wireless network connection for streaming live data between the device and the database. The data from the orientation sensor and the position sensor both go directly into the mobile device as input to a controller in the device. The controller controls in part an audio/video output that is modulated based upon the relative position of the user to an object of interest as well as the user's orientation.

Abstract: A motorcycle helmet for permitting a user to listen to a compact disk while wearing a helmet. The motorcycle helmet includes a helmet being designed for protecting a head of a user from impact. The helmet has a perimeter wall defining an interior space. A playing assembly is positioned in the perimeter wall of the helmet. The playing assembly is designed for reading audio information from a compact disc. Each of a plurality of speakers is positioned in the perimeter wall of the helmet. Each of the speakers is operationally coupled to the playing assembly. Each of the speakers is designed for audibly playing the audio information read by the playing assembly.

Abstract: A cellular camera telephone is provided with aiming, illumination, and decoding functionality to enable the economical and ergonomic reading and decoding of bar code symbols. The aiming and illumination are preferably a single system to minimize power consumption, such as by projecting a rectangle of light to both frame and illuminate the image area containing the target bar code. The cell phone is further provided with a lens system that permits switching between the ‘normal’ picture-taking focal range of from a few feet to infinity, and a bar code-reading focal range on the order of from a few to several inches. The lens system may involve, or combine, conventional autofocus/autozoom technology, fluid or adaptive lens technology, and liquid crystal lens technology. The cell phone may both acquire information from scanning bar codes, and transmit information by creating and displaying bar codes.

Abstract: Methods and systems for transmitting and receiving digital data are disclosed. In accordance with one aspect, a data communications device is disclosed. The device includes a handheld-sized housing containing circuitry including a powered region and an unpowered region. The powered region is configured to be operable in the absence of a connection to a computing system, the powered region including a programmable circuit and a wireless transceiver, the programmable circuit connected to the wireless transceiver for wirelessly exchanging files with another data communications device, the programmable circuit including a memory. The unpowered region is configured to be inoperable in the absence of a connection to a computing system, the unpowered region including a USB interface and a flash memory. The unpowered region is communicatively connected to the powered region.

Abstract: Briefly, in accordance with one or more embodiments, the location of a mobile device within a floor plan of a building or the like environment may be determined using a single transmission link between transceiver and the mobile device. A bit error rate value and a receiver signal strength indication value are measured for the present location of the mobile device in the floor plan. The coordinates where the mobile device is located may be determined by looking up the measured bit error rate value and the received signal strength indication value in a lookup table. Due to environmental factors of the floor plan, the combination of the bit error rate value and the received signal strength indication value corresponds to a unique coordinate location in the floor plan from which the location of the mobile device may be determined.

Abstract: A technique for producing a scent from a hand-held device involves receiving a scent mixture formula at a hand-held device, converting the scent mixture formula into dispense control signals, and generating a scent mixture in response to the dispense control signals, the scent mixture being generated from different base scents that are individually stored within the hand-held device. In an embodiment, the scent mixture formula includes a scent identifier and a scent quantifier related to each base scent that is used to generate the scent mixture. Mixing multiple base scents to generate scent mixtures greatly expands the range of different scents that can be generated at a hand-held device that stores a limited number of base scents. Further, encoding a scent mixture into a scent mixture formula enables scent mixtures to be easily shared between hand-held devices.

Abstract: The present invention relates to a method and system for managing audio data to be provided to a mobile device user, comprising: (a) one or more video streams with audio data to be run on a streaming server; (b) an audio data database comprising audio data for each video stream, wherein the corresponding audio data is automatically downloaded to user's mobile device and stored therein, upon receiving a command from a user to start running the video stream to which said corresponding audio data is related; (c) a predefined data software component comprising predefined data commands for activating one or more corresponding sounds of the audio data downloaded and stored within said user's mobile device; (d) a receiver for receiving said command from said user to start running the corresponding video stream; (e) a transmitter for transmitting commands to the mobile device to play one or more corresponding sounds of the downloaded audio data, according to the data provided by said predefined data software componen

Abstract: A self-contained radio frequency (RF) wireless communication device (100) comprising an explosion-proof housing (110), an internal electronic system for the conversion of radio wave and conducted electrical signals, and an internal antenna system located within a non-metallic portion (130) of the housing for collecting and emitting radio wave energy. The antenna system enables the wireless communication device (100) to safely collect and emit radio wave energy using one or more optimally configured antenna resonators (351), with each antenna resonator differing each other antenna resonator by at least one attribute in a group of attributes comprising: frequency response, field polarization, and wavelength spatial diversity.

Abstract: The present invention is a method and mobile terminal which permits at least one mobile terminal function to be activated and selected using at least one soft key during an inactive and locked mode of a mobile terminal keypad. A mobile terminal in accordance with the invention includes a controller (18); a keypad (2) comprising a plurality of keys (7, 8a, 8b, 10), including at least one soft key coupled to the controller, the keypad being under control of the controller and having an active mode during which key inputs from the keys activate mobile terminal functions and the inactive mode during which a first type of key input from the at least one soft key to the controller does not activate the mobile terminal functions; and wherein during the inactive mode, the controller is responsive to a second type of key input from at least one soft key which activates at least one mobile terminal function without return to the active mode.

Abstract: A wireless mobile device is equipped with a menu driver that facilitates direct navigation between main menu items or activities. In one embodiment, a user may navigate from a last sub-menu item/sub-activity state of a menu item/activity to another last sub-menu item/sub-activity state of another menu item/activity. In one embodiment, sub-menu items or sub-activities are presented as in place scroll list replacing a selected sub-menu item/sub-activity.

Abstract: A method of assigning contact phone numbers of a select number of contact phone numbers in a wireless, display-less, keypad-less communication device includes accessing a website on a global computer network to assign contact phone numbers to respective lights and call buttons for the contacts; receiving a prompt to enter data identifying the device; inputting data identifying the device; receiving a prompt to enter a phone number for each contact in a data field for the respective light and call button; entering a phone number for each contact in the data field for the respective light and call button; and transmitting the entered data to the device so that the contact phone numbers are assigned to the respective call buttons and the respective lights.

Abstract: Embodiments provide an apparatus, a system, a device, and a method. A method includes automatically providing data indicative of a location of a first mobile wireless communications device from the first mobile wireless communications device to a second mobile wireless communications device in response to respective human-user imitated authorizations exchanged between the two mobile wireless communications devices.

Abstract: A trail marking system consisting of a plurality of identical beacon units, each capable of communicating with another unit. The beacon units contain audible and visible signaling devices that may be used independently or in combination. The units are designed to be deployed along a path of ingress into unfamiliar terrain. When a user wishes to retrace his or her steps, the closest beacon unit is activated and audible, visible, or both, depending on the mode selected. The closest beacon unit transmits an RF signal that propagates to the next beacon unit. Upon receipt of the RF signal, the second beacon unit activates in the selected mode. As the user returns to each of the previously deployed beacon units, they are collected for reuse. The beacon units of the present invention are weatherproof, have a long battery life, and are designed to be virtually invisible to game animals, for example, deer.

Abstract: A two-way radio frequency lighting control system comprises a master control including a plurality of manual actuators, and a plurality of dimmers, in which the number of dimmers does not exceed the number of manual actuators. After the lighting control system is installed in an intended end user location, and prior to the first time the lighting control system is energized in the intended end user location, each of the manual actuators is operative to affect the status of one, and only one, of the plurality of dimmers. A turn key lighting control system in which there is a one-to-one correspondence of manual actuators to dimmers is thereby provided.

Abstract: A software defined radio has a radio circuit and executable radio software system operable with the radio circuit, and defining an operating environment that allows a waveform application to operate with the radio circuit for transmitting and receiving voice and data. A processor, such as a Field Programmable Gate Array (FPGA), is operable with the radio circuit and includes an event sequencer for controlling the sequence and timing of events in the radio circuit.

Abstract: A wireless mobile phone is provided with the capability to visually convey various information to users, using a number of light emitting devices (LEDs). The information may include notification of an incoming call, text messages of a call (in Morse code representations), complementary graphics for non-graphics contents, and visual representations of attributes of sound. In various embodiments, the implementations may include a visualization controller to selectively activate and deactivate the LEDs, and applicable ones of an event, text and sound visualization clients. In various embodiments, all or selected combinations of the elements may be part of the base unit of the wireless mobile phone, while the remaining elements, if any, may be part of an interchangeable face plate or a covering skin.

Abstract: A multipurpose radio is disclosed to include a power control unit, which uses a rechargeable battery to provide the necessary working voltage to a LED lamp for illumination, a hand-driven dynamo to generate electricity for recharging the rechargeable battery, a power adapter for charging the rechargeable battery with city power supply, a radio circuit unit for receiving AM and FM radio broadcasting signals, TV audio signals and NOAA signals, and a function mode display unit, which uses a speaker for voice output, a screen for data display, and a selector key for frequency selection.

Abstract: A Personal Locator Beacon (PLB), supporting two operation modes local monitoring and remote monitoring. The apparatus includes a PLB that supports the present operation mode, as well as a local monitoring mode, employing the same transmitter, and automatically switching between modes. Upon activation, the PLB first tries to communicate with a local monitoring station, at a low transmission power, and at a high repetition rate, in purpose of dealing with the PLB call locally, without involving the remote monitoring station. Then, if not acknowledged by a local monitoring station, the PLB increases its transmission power, enabling access to a remote monitoring station. In a preferred embodiment, the PLB is carried by a person onboard a vessel, to alarm upon a Man Overboard (MOB) accident, the local monitoring station is installed onboard the same vessel, and the remote monitoring station is part of a satellite Search and Rescue (SAR) system, as Cospas-Sarsat.

Abstract: An antenna device includes a plurality of radiation elements, at least one or more reactance elements, and a changeover switcher for selectively switching over between one circuit pattern forming a first-type antenna such as a diversity antenna where a predetermined one of the plural radiation elements is used as a feed element, and another circuit pattern forming a second-type antenna such as an ESPAR antenna where one of the plural radiation elements is used as a feed element while the reactance elements are connected to the other radiation element. According to this antenna device, the receiving sensitivity can be improved by using a reduced number of radiation elements in a mobile communication apparatus such as a cellular telephone.