Abstract: In an antenna feed structure for electrically connecting a rotatable antenna to a circuit formed on a circuit board by means of a feeding metallic part, an antenna rotary shaft formed so as to protrude from one end of the antenna and formed of a conductor has a preferably spherical end. The feeding metallic part has a mounting portion, an antenna contact-and-connection portion, and an elastic supporting portion. The mounting portion is mounted to the circuit board. The antenna contact-and-connection portion is brought into contact with and is connected to the end of the antenna rotary shaft. The elastic supporting portion supports the antenna contact-and-connection portion at the mounting portion and produces biasing force towards the antenna rotary shaft from the antenna contact-and-connection portion. The antenna contact-and-connection portion has a recess wall preferably having a spherical shape which is in correspondence with the spherical shape of the end of the antenna rotary shaft.

Abstract: A method for controlling access to a data communication network, comprising the steps of: upon connection of a user to a data communication network, making available on the network an age identifier which is suitable to define the age of the user who wishes to make the connection; entering, on the part of the user, the address of a site of interest which the user intends to visit, the address being automatically associated with the age identifier made available on the network; and allowing the user to perform the network connection on the basis of the reading of the age identifier associated with the address keyed in by the user, and steering accordingly the network navigation of the user.