Abstract: When an operation knob 10 formed of silicone rubber is pushed laterally, a stem 7 tilts with a contact portion (i) as a fulcrum, a push button portion 6b is pushed, and a contact point in a switch mechanism portion 6a operates to turn on a switch circuit. Even if, by a large operating force F3 being applied, the operation knob 10 is extended and the inner surface portion 15, which is a ceiling surface of an internal space 13 of the operation knob 10, rides on an upper end portion 7c, a reinforcing surface 19 provided on the inner surface portion 15 slides on the upper end portion 7c, and the operation knob 10 returns to the initial shape.

Abstract: An antenna device housed in a metallic case body of an electronic timepiece includes: a first substrate which is provided on the side of a back over of the metallic case body and on which a ground pattern and an wireless communication unit as a power feeding circuit are formed; a second substrate which is arranged on the opposite side of the movement and on which a chip antenna is formed; and a conductive electrode which is arranged inside the movement and has one end connected to the wireless communication unit and the other end connected to the chip antenna.

Abstract: To provide a sleeve antenna that can be attached to a chassis while maintaining favorable antenna gain even when using a small circuit board, and a wireless communication device. The sleeve antenna includes: a coaxial feed line 12; a radiating portion 14 that has a predetermined length and results from removing an outer conductor 30 at a tip portion of the coaxial feed line 12; and a sleeve 10 that has a predetermined length and covers the coaxial feed line 12 from a proximal end of the radiating portion 14 toward a direction opposite to the radiating portion 14. At least one of the radiating portion 14 and the sleeve 10 has a bent portion 36 in at least a portion thereof.

Abstract: An antenna device housed in a metallic case body of an electronic timepiece includes: a first substrate which is provided on the side of a back over of the metallic case body and on which a ground pattern and an wireless communication unit as a power feeding circuit are formed; a second substrate which is arranged on the opposite side of the movement and on which a chip antenna is formed; and a conductive electrode which is arranged inside the movement and has one end connected to the wireless communication unit and the other end connected to the chip antenna.

Abstract: To provide a sleeve antenna that can be attached to a chassis while maintaining favorable antenna gain even when using a small circuit board, and a wireless communication device. The sleeve antenna includes: a coaxial feed line 12; a radiating portion 14 that has a predetermined length and results from removing an outer conductor 30 at a tip portion of the coaxial feed line 12; and a sleeve 10 that has a predetermined length and covers the coaxial feed line 12 from a proximal end of the radiating portion 14 toward a direction opposite to the radiating portion 14. At least one of the radiating portion 14 and the sleeve 10 has a bent portion 36 in at least a portion thereof.

Abstract: A wireless communication apparatus includes a transmitter circuit whose transmission power is set variably, a wireless communication section having a receiver circuit, and a processing section that executes a control of the wireless communication section. The processing section sets the transmission power of the transmitter circuit to a first transmission power when it executes normal data communication and sets the transmission power of the transmitter circuit to a second transmission power smaller than the first transmission power when it executes a pairing process.

Abstract: A communication device includes: an ultrasonic oscillating unit which detects or generates an ultrasonic wave; a communication unit which transmits and receives information using the ultrasonic wave; a storage unit which stores a table to which a communication command to designate communication with the another communication device is allocated in time series, the table being shared by the another communication device; and a control unit which shifts the communication unit to one of a transmitting state, a receiving state, and a standby state that is neither the transmitting nor the receiving state, synchronously with the another communication device on the basis of the communication command in the table.

Abstract: A communication device includes: an ultrasonic oscillating unit which detects or generates an ultrasonic wave; a communication unit which transmits and receives information using the ultrasonic wave; a storage unit which stores a table to which a communication command to designate communication with the another communication device is allocated in time series, the table being shared by the another communication device; and a control unit which shifts the communication unit to one of a transmitting state, a receiving state, and a standby state that is neither the transmitting nor the receiving state, synchronously with the another communication device on the basis of the communication command in the table.

Abstract: An antenna apparatus is provided that includes a printed wiring board, electronic components disposed on the printed wiring board, a shielding member (ground member) that is disposed on the printed wiring board. The shielding member has a length along a predetermined directional axis X set substantially to ¼? or more, the wavelength of an electromagnetic wave used for communication being ?. An antenna element extends in a direction crossing the directional axis X and is grounded to the shielding member (ground member).

Abstract: An antenna device for a high frequency radio apparatus is equipped with an antenna element which is placed on a circuit board whose peripheral shape has a curve. The antenna element also follows the peripheral shape of the circuit board to have a curved part when viewed from above. The antenna device also has a ground pattern where the antenna element touches. The ground pattern can be placed at a constant distance from the antenna element toward the board. Furthermore, the ground pattern can be formed on almost the entire area of the circuit board other than where the antenna element is formed. Also, the circuit board may be a multilayer circuit board, and the ground pattern can be formed almost on the entire area of any one layer of the multilayer circuit board other than where the antenna element is formed.

Abstract: An antenna apparatus is provided that includes a printed wiring board, electronic components disposed on the printed wiring board, a shielding member (ground member) that is disposed on the printed wiring board. The shielding member has a length along a predetermined directional axis X set substantially to ¼&lgr; or more, the wavelength of an electromagnetic wave used for communication being &lgr;. An antenna element extends in a direction crossing the directional axis X and is grounded to the shielding member (ground member).

Abstract: A first control unit 110 and second control unit 120 are disposed to a portable data terminal 100 having a heavy load group 140 and light load group 150. The first control unit 110 detects the output voltage of a secondary battery 105 and controls power supply to the heavy load group 140 by switching a first switch S1. When the first control unit 110 stops power supply to the heavy load group 140, it outputs a low level control signal CC to the second control unit 120. The load of driving the second control unit 120 is designed to be smaller than the load of driving the first control unit 110. When the control signal CC is received, the second control unit 120 starts detecting the output voltage of the secondary battery 105, and stops power supply to the switch light load group 150 and first control unit 110 if the output voltage is detected to drop to a preset threshold voltage.

Abstract: An antenna device for a high-frequency radio apparatus that enables the apparatus to be made compact and improves its sensitivity. The antenna has an L-shaped antenna element, the shorter part of which extends perpendicularly from a circuit substrate which has a ground pattern formed thereon. The area of the orthogonal projection of the longer part of the L-shaped antenna element, which is spaced apart from the circuit substrate and substantially parallel to its surface which has the ground pattern formed thereon, is smaller than the area of the ground pattern. The antenna also has a feeding line which is substantially parallel to the shorter part of the L-shaped antenna element. A dielectric member, which also functions to secure various components, is placed close to the antenna element so as to set the resonance frequency of the antenna device.

Abstract: A first control unit 110 and second control unit 120 are disposed to a portable data terminal 100 having a heavy load group 140 and light load group 150. The first control unit 110 detects the output voltage of a secondary battery 105 and controls power supply to the heavy load group 140 by switching a first switch S1. When the first control unit 110 stops power supply to the heavy load group 140, it outputs a low level control signal CC to the second control unit 120. The load of driving the second control unit 120 is designed to be smaller than the load of driving the first control unit 110. When the control signal CC is received, the second control unit 120 starts detecting the output voltage of the secondary battery 105, and stops power supply to the switch light load group 150 and first control unit 110 if the output voltage is detected to drop to a preset threshold voltage.

Abstract: An antenna device for a high frequency radio apparatus is equipped with an antenna element which is placed on a circuit board whose peripheral shape has a curve. The antenna element also follows the peripheral shape of the circuit board to have a curved part when viewed from above. The antenna device also has a ground pattern where the antenna element touches. The ground pattern can be placed at a constant distance from the antenna element toward the board. Furthermore, the ground pattern can be formed on almost the entire area of the circuit board other than where the antenna element is formed. Also, the circuit board may be a multilayer circuit board, and the ground pattern can be formed almost on the entire area of any one layer of the multilayer circuit board other than where the antenna element is formed.

Abstract: An IC mounting structure and a communication apparatus is provided in which the structure of a circuit substrate is improved, the positional relationship between an IC and an antenna member is optimized, and the influence of high-frequency noises from the active surface of the IC can be prevented. In a wrist-fitting communication apparatus, an IC which generates high-frequency noises is face-down bonded on a circuit substrate such that the active surface faces the side opposite to the direction where most of or the entire antenna member is positioned. The circuit substrate is a multilayer substrate in which a shielding electrode layer maintained at the ground potential or a power supply potential is formed. High-frequency noises generated from the active surface of the IC are reduced by the shielding electrode layer. Also, electromagnetic field leaking to the surroundings is weak. Accordingly, the influence of noise upon the antenna member is small.

Abstract: A miniaturized and thin slot antenna device maintains high transmitting and receiving performance by improving the configuration of an antenna body and a circuit substrate. The slot antenna device includes an antenna body made of an electrically conductive member having a slot into which the circuit substrate is placed. Alternatively, the slotted, electrically conductive member can be placed flat on a first surface of the circuit substrate, which can contain a reflector on its second, opposite surface. The slot antenna device also can be constructed from two parallel, opposed, electrically conductive members spaced apart by a gap so that a slot is defined by outer peripheries of the electrically conductive members. The electrically conductive members can be provided on opposite surfaces of a circuit substrate.

Abstract: A miniaturized and thin slot antenna device maintains high transmitting and receiving performance by improving the configuration of an antenna body and a circuit substrate. The slot antenna device includes an antenna body made of an electrically conductive member having a slot into which the circuit substrate is placed. Alternatively, the slotted, electrically conductive member can be placed flat on a first surface of the circuit substrate, which can contain a reflector on its second, opposite surface. The slot antenna device also can be constructed from two parallel, opposed, electrically conductive members spaced apart by a gap so that a slot is defined by outer peripheries of the electrically conductive members. The electrically conductive members can be provided on opposite surfaces of a circuit substrate.

Abstract: A wrist carried wireless instrument for minimizing the effects of coming in contact with the wrist of the user is provided. A case contains wireless instrument circuitry. A loop antenna extends without the case. An antenna resonance circuit has two capacitors connected in series. The two capacitors are connected to the loop antenna. A connection between two of the capacitors is formed at substantially the half impedance value across the capacitors and is a ground electric potential. An RF amplifier connects the loop antenna to the wireless instrument circuitry.

Abstract: The invention is directed to a wristwatch type paging device having a structure for preventing the intrusion of static electricity. The paging device is provided for receiving or transmitting signals. A pager circuit is provided for controlling and operating on the received or signals to be transmitted. A pager body, having a two part wrist band coupled thereto, houses the pager circuit. The body is formed with at least a conductive portion. The band fastens around the wrist of the user and carries antenna portions. A fastener mechanically couples the end portions and electronically couples the antenna portions. The conductive portion of the pager body is set to the AC ground potential (the potential of one of the positive or negative electrodes of the battery). A balanced varactor diode circuit is provided between the antenna portion ends defining an essentially neutral point coupled to one of its positive and negative electrodes.