Abstract: A door approach transmission apparatus comprises an outside door handle 20 having a conductor with a slit 23 disposed in the door handle surface. A slot antenna 21, 23, 24, 25 is disposed at the slit 23, and includes feeding points 24, 25 installed on the conductor. The apparatus also includes a transmitter 26 for applying voltage for radio wave oscillation to the feeding points 24, 25. The above-described door approach transmission and reception apparatus can be used in a door lock control apparatus where a search radio wave is emitted from a vehicle, a portable wireless device 10 receives the search radio wave, and returns an ID signal. An electrically driven door lock apparatus 40 is driven to unlock the door when the returned ID signal coincides with a registered ID signal. The search radio wave is irradiated from the slot antenna. Either of a transmitter 26 and a receiver 33 is selectively connected to the feeding points 24, 25.

Abstract: A loop antenna device has a first antenna generating a first magnetic field and a second antenna generating a second magnetic field such that the first magnetic field and the second magnetic field each have a different axis. A series resonant circuit and a parallel resonant circuit are provided for the first antenna and the second antenna, respectively. The series resonant circuit has at least a second coil, a link coil wound around a ferrite core, and a capacitor in series. The parallel resonant circuit has a first coil and a capacitor. When one of the first and second antennas are disposed in the vicinity of a conductor, an electromagnetic wave absorbing member is disposed between a conductor and one of the first and second antennas.

Abstract: A remote control apparatus comprises a vehicle-mounted unit including a transmitter (26, 28, 23) for transmitting an ID request, a receiver (32, 33) for receiving a reply ID transmitted in response to the ID request, controller (31) for controlling the operation state of equipment (40, 60) depending on whether the receiver (32, 33) receives the ID, as well as a portable unit (10) for transmitting a reply ID in response to the ID request. When a hand sensor (1) provided in a door handle of a vehicle senses no hand and the receiver (32, 33) receives an ID, the controller (31) decreases the transmission power of the ID request. The hand sensor (1) comprises a slot antenna having an outside door handle, the surface of which is formed of a conductive material, a slit formed in the conductive material, and feeding points. The antenna is used for transmission of the ID request.

Abstract: Abnormal losses outside a reflection band attributable to a mismatch of core field diameters are suppressed. A photo-sensitive fiber comprising a core 1 and a cladding having a cladding inner layer and a cladding outer layer formed in this order around the core, in which at least the core is photo-sensitive to form a grating. The core and cladding inner layer include a photo-sensitive dopant for increasing the refractive index. The core additionally includes a first non-photo-sensitive dopant for increasing the refractive index and the cladding inner layer additionally includes a second non-photo-sensitive dopant for creasing the refractive index.

Abstract: A loop antenna has a first antenna generating a first magnetic field and a second antenna generating a second magnetic field such that the first magnetic field and the second magnetic field each have a different axis. A serial resonant circuit and a parallel resonant circuit are provided for the first antenna and the second antenna, respectively. The serial resonant circuit has a ferrite member, a first coil wound around the ferrite member, a resonant capacitor, and a power source connected thereto in series. The in-series connection of the resonant capacitor and the power source are connected across the first coil. The parallel resonant circuit has a link coil wound around the ferrite member, a second coil connected to the link coil in series and wound around a member outside the ferrite member, and a resonant capacitor connected in parallel to the series connection of the second coil and the link coil.

Abstract: Nitrous oxide contained in a gas is directly decomposed by contacting the gas with a catalyst layer composed mainly of tin (IV) oxide at a reaction temperature of not less than 250.degree. C., preferably not less than 300.degree. C. Particularly when a cobalt (II) compound is added to the catalyst layer, nitrous oxide can be effectively removed to a low concentration by contacting the gas with the catalyst layer at the reaction temperature of not less than 200.degree. C., preferably not less than 300.degree. C. By the present process, nitrous oxide which has not conventionally effectively removed can be reliably removed at a low cost. The present process can be applied for the removal of nitrous oxide in exhaust gases discharged from a sludge-incinerating furnace, a boiler fine powder coal combustion furnace, etc.

Abstract: A fastening member is formed from a fiber-reinforced ceramic composite material, in which a ceramic material is reinforced with a plurality of inorganic long fibers. The inorganic long fibers are located in the ceramic material such that first orientated layers, in which the inorganic long fibers are orientated in a predetermined direction, and second orientated layers, in which the inorganic long fibers are orientated in a direction different from the direction of orientation of the inorganic long fibers in the first orientated layers, may be laminated alternately.

Abstract: A relative speed of a vehicle with respect to a satellite is detected from a deviation of a tuning frequency caused by the Doppler effect, and a vehicle speed is determined from the relative speed. A piezoelectric oscillation gyro detects an angular speed of rotation of the vehicle, which is integrated to determine an azimuth. A travel is detected in terms of the vehicle speed and the azimuth, and the detected travel and information from available GPS satellites are substituted into a navigation equation to solve it for a solution. Alternatively, altitude information detected by an altitude sensor and the angular speed of rotation of the vehicle as detected by the piezoelectric oscillation gyro may be is inputted. The angular speed of rotation is integrated to determine the azimuth. Information from two GPS satellites and information representing azimuth .phi. and altitude .DELTA.z are substituted into the navigation equation to solve it for a solution. Kalman filter is employed.

Abstract: A length of time required for the verification of data transmitted from a satellite or satellites is reduced. A distance r1 calculated from a time delay required for the propagation of a radio wave between a transmitting and a receiving site is obtained, as is a line-of-sight distance r2 which is calculated from the positions of a satellite and a point of reception. When a difference between these two distances is small, data from these satellites are regarded as valid data. However, when the difference is large, data is regarded as involving a large error. The position of the point of reception is determined by a positioning calculation which utilizes data from predetermined three or four verified satellites, or is entered by an operator. The position of the satellite is obtained from orbital data which is delivered by that satellite.

Abstract: A three band antenna unit for reception of radio waves in the AM and FM bands and for reception and transmission of radio waves in the UHF band as well as its connection with filters and a communication equipment are disclosed. The antenna unit includes an upper, first element for reception and transmission of a radio wave in the UHF band and a lower, second element for reception of radio waves in the FM band, both connected to a mobile telephone. An AM band signal from the first element is transmitted to the lower, second element through an AM band pass filter. A radio wave signal from the lower, second element is transmitted to an AM/FM tuner through an AM/FM band pass filter.

Abstract: A wire antenna for circularly polarized wave has a loop conductor that is composed of an outer element 3a of one turn and an inner element 3b of three-fourths turn. The antenna has an overall length of approximately 7/4 wave length and is a 7/4 turn loop of a rectangular shape with opposite ends separated. Feeding terminals 2a and 2b as feeding points are positioned at one turn point of the loop conductor.

Abstract: A microstrip antenna device is disclosed as having three resonance frequencies comprising, a dielectric sheet whose thickness is smaller than the used wave length, a radiating conductor sheet which is disposed on one surface of the dielectric sheet and which is a rectangular shape and has line load in the center of one side of the rectangle, and a ground conductor sheet disposed on the other surface of the dielectric sheet.

Abstract: A microstrip antenna comprises a dielectric plate having a thickness to be sufficiently shorter than a free space wavelength, a rectangular radiation conductive plate member mounted on one surface of the dielectric plate and set to be constructed that each side ranges from 1/4 of guide wavelength through 1/2 of guide wavelength, and a pair of opposed parts each of which is extended from each side of the rectangular radiation conductive plate member and each side of parts is less than 1/4 of guide wavelength.

Abstract: A GPS signal receiver has a PN code generator for producing a PN code identical to a PN code in a received GPS signal which is transmitted from a GPS satellite, the PN code produced by the PN code generator being controllable in phase, a PN code correlator for correlating the received GPS signal with the PN code produced by the PN code generator so as to code-strip the received GPS signal, a signal search unit for monitoring a correlated output signal from the PN code correlator and controlling the phase of the PN code produced by the PN code generator to search for a correlated output signal in excess of a predetermined value, a signal determining unit for determining the correlated output signal in excess of the predetermined value as being produced by a direct wave of the GPS signal, and a signal tracking unit for controlling the phase of the PN code produced by the PN code generator to track a peak of the correlated output signal that is determined as being produced by the direct wave of the GPS signal.

Abstract: A plug-type sealing assembly for hermetically closing a filler hole 24 of a lid 19 of a container 20, comprises: a plug 1 having a rod portion 3 in an upper part of which a large-diameter head portion 2 is formed, the rod portion 3 having a male screw 5 in its outer peripheral surface; and, a sleeve 8 provided with an axial through-hole together with a countersunk head portion 10 and a slit skirt portion 11 extending downward from a lower end of said countersunk head portion 10. In the through-hole, a female screw 15a, 15b is formed.

Abstract: A rod antenna includes extensible elements electrically connected to a high frequency power supply member. A low pass filter has one terminal connected to the extensible elements and the other terminal connected to a low frequency power supply member.

Abstract: An antenna device is comprised of a base member fixed to an automobile body, a first mast member, a second mast member and a third mast member. The third mast member is supported by the base member, the second mast member is supported by the third mast member and includes a plurality of telescopic elements and the first mast member is supported by one end of the second mast member and located away from the automobile body. A feeder conductor is connected to the first mast member through an impedance matching coil with the feeder conductor and the coil being molded in a resin elevation member. The resin elevation member extends through the second and third mast members and has an enlarged portion which surrounds the coil. The enlarged portion of the resin elevation member is in engagement with the second mast member and elevates the second mast member upon movement away from the automobile body.

Abstract: A position display apparatus comprises a frame having a space for setting a map book; a memory for storing date on the map book; a position detector for detecting a position; a display provided on or in the vicinity of the frame; and a control means for selecting a page of the map book in accordance with map data stored in the memory and position information detected by the position detector, and for giving an instruction to the display to enable the display to display the data concerning the number of the selected page. The control gives an instruction to the display for displaying the number of the selected page. Alternatively, the control gives an instruction to the display for displaying coordinate data on the basis of the position detected by said position detector and the selected page.

Abstract: A microstrip antenna device for circularly polarized waves includes a dielectric sheet member, one surface of which has a radiating conductor sheet member while the opposite surface has a ground conductor sheet member. Denoting a point where a segment of a line passing through a geometrical center o, o of the radiating conductor sheet member intersects with the substantial periphery of the radiating conductor sheet member by a and denoting a point where the segment intersects with the substantial periphery of the ground conductor sheet member by b, the ratio of the length between the points o and b to the length between the points o and a should be at least equal to 1.5. Where rectangular radiating and ground conductor sheet members are used, a good circular polarization is achieved without any disturbance in the radiating pattern when the diagonal ratio of the respective members is equal to or greater than 1.5.

Abstract: A microstrip antenna has a rectangularly-shaped radiation conductive plate attached to one side of a dielectric plate, with a grounding conductive plate being attached to the other side of the dielectric plate. Rectangular line loads extend from adjacent sides of the radiation conductive plate. With such a configuration, the antenna retains all of the advantages of a microstrip antenna, including light weight, compactness, ease of manufacture, and a low profile, while enabling operation at multiple frequencies (four, on one embodiment), or polarization at multiple frequencies (two, in another embodiment).