Abstract:
PROBLEM TO BE SOLVED: To determine the validity of a position detected by GPS. SOLUTION: In this acquiring device, position information showing the position of a position detection device is acquired from the position detection device for detecting the position by the GPS. The position detection device has a distance measuring part for measuring the distance from the position detection device to each of a plurality of satellites, and a device position calculation part for calculating the device position which is the position of the position detection device based on the distance measured by the distance measuring part and the position of each of the plurality of satellites. The acquiring device is equipped with an acquiring part for acquiring from the position detection device the distance measured by the distance measuring part and the device position calculated by the device position calculation part, a position calculation part for verification for calculating the position for verification which is a position to be calculated by the device position calculation part based on the acquired distance and the position of each of the plurality of satellites at the point of measuring time of the distance, and a validity determination part for determining that the device position detected by the position detection device is valid when the device position agrees with the position for verification. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a structure using no signal cable as a transmission means of a high frequency signal between a main body of an electric device with a cover such as a notebook personal computer(PC) and the cover. SOLUTION: When the cover 104 of the notebook PC is closed, a high frequency signal from radio equipment 108 provided on the main body 101 is transmitted from a 1st antenna 106 to a 2nd antenna 109, and then emitted externally from a 3rd antenna 111. In this structure, since the high frequency is transmitted with non-contact from the antenna 106 of the main body 101 to the antenna 109 of the cover 104, no signal cable interconnecting the main body 101 and the cover 104 is required.
Abstract:
PROBLEM TO BE SOLVED: To provide an aperture antenna that can match a coaxial cable in compliance and the standards without the need for using a matching circuit. SOLUTION: The antenna system is provided with a 1st planar conductor 2a having an aperture whose length in a 2nd direction (x direction) perpendicular to a 1st direction (y direction) is longer than the aperture length in the 1st direction, a 2nd conductor 2b that is placed in the inside of the aperture within substantially the same plane as that of the 1st conductor 2a and apart from the 1st conductor, and an unbalanced high frequency cable 4 (transmission line) whose center conductor 4a (signal wire) is connected to the 2nd conductor 2b and whose outer cover conductor 4b (ground wire) is connected to the 1st conductor 2a. A center distance Xb of gaps existing between the 1st and 2nd conductors in the 2nd direction is selected to be 1/2 of an electric length λwith respect to a frequency band of a radiated radio wave signal.