Abstract: With the object of providing a mobile wireless equipment with a multi-frequency antenna capable of performing communication with a GPS system in addition to conventional communication with mobile wireless systems, an antenna 10 for mobile wireless equipment and a GPS antenna 4 are tightened together by threading an antenna fixing nut 19 onto a holder 7 from within a casing 101, after inserting a holder 7 of the antenna 10 for mobile wireless equipment from above a through-hole 4b of the GPS antenna 4 and inserting the holder 7, which projects from below, from above into an aperture 101a of the casing 101. Also, positioning and fixing of the GPS antenna 4 are performed by engagement of claws 41, 41 formed on the GPS antenna 4 and a positioning boss 42 with claw receiving sections 43, 43 and a boss receiving section 44 formed in the upper part of the casing 101.

Abstract: With the object of providing a mobile wireless equipment with a multi-frequency antenna capable of performing communication with a GPS system in addition to conventional communication with mobile wireless systems, an antenna 10 for mobile wireless equipment and a GPS antenna 4 are tightened together by threading an antenna fixing nut 19 onto a holder 7 from within a casing 101, after inserting a holder 7 of the antenna 10 for mobile wireless equipment from above a through-hole 4b of the GPS antenna 4 and inserting the holder 7, which projects from below, from above into an aperture 101a of the casing 101. Also, positioning and fixing of the GPS antenna 4 are performed by engagement of claws 41, 41 formed on the GPS antenna 4 and a positioning boss 42 with claw receiving sections 43, 43 and a boss receiving section 44 formed in the upper part of the casing 101.

Abstract: With the object of reducing the size, without degrading the electric characteristics, a first coil 21 and a second coil 23 that are helically wound are provided, and a connection member 22 is provided which is obtained by bending the upper end portion of the first coil 21 downward and passing it inside the first coil 21 substantially along the central axis of the first coil 21. The lower end portion of the connection member 22 is connected to the upper end of the second coil 23, and power is supplied from a feeder 24 to the lower end portion of the second coil 23.

Abstract: With the object of reducing the size, without degrading the electric characteristics, a first coil 21 and a second coil 23 that are helically wound are provided, and a connection member 22 is provided which is obtained by bending the upper end portion of the first coil 21 downward and passing it inside the first coil 21 substantially along the central axis of the first coil 21. The lower end portion of the connection member 22 is connected to the upper end of the second coil 23, and power is supplied from a feeder 24 to the lower end portion of the second coil 23.

Abstract: Taking the spiral circumference, C, of a single wire spiral antenna as 2.3 .lambda. (.lambda. being the wavelength at the operating frequency), for example, the beam radiated from an axis Z perpendicular to the antenna surface is tilted. The beam tilt angle changes with the spiral circumference, C, and the spiral circumference, C, is set to between 2 .lambda. and 3 .lambda..

Abstract: An extendible whip antenna suitable for a hand-held two-way radio apparatus having a wide frequency band and a high sensitivity is disclosed, in which when it is used for communication, a 1/2-wave length whip antenna is extended outside of a case and a stopper conductor thereof is engaged with a holder conductor so that it is connected with a radio circuit through a matching circuit together with a 1/2-wave length helical antenna element.

Abstract: An antenna used for a plurality of frequencies in common according to the present invention has two signal feeding systems for an integrated antenna. The antenna is so constructed that the signal feeding systems are perfectly isolated in DC from each other through a capacitor and at the same time in high frequency, only the signal system for the car telephone frequency band, which is a communication with a moving body, is coupled with the whole antenna, while the signal system for the AM/FM radio frequency band is separated from the antenna radiator portion (radiating element) working at the car telephone frequency band. Owing to a great difference in the frequency between the AM/FM radio frequency band and the car telephone frequency band, no disturbance such as mutual interference, etc. is produced and thus it is possible to obtain stable signal systems separated from each other.