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US 6,445,347 B1Granted
Portable radio devices and manufacturing method of portable radio devices body
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorAkitoshi Yoshimi
Life of this patent
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AssigneeMitsubishi Denki Kabushiki Kaisha
InventorAkitoshi Yoshimi
Estimating the term…
Of two body parts constituting a cellular telephone, a back body part has a body main part and an antenna attachment portion. An antenna for transmitting and receiving radio waves to and from a satellite has a cylindrical excitation antenna and a cylindrical helical antenna. The helical antenna is attached in such a manner that it can be pulled out to establish a state that it does not contact the inner circumferential surface of the excitation antenna. The excitation antenna is integrally molded with the back body part such that of the outer circumferential surface of the excitation antenna an antenna element surface that is formed with antenna elements comes into close contact with the inner circumferential surface of the antenna attachment portion. This structure dispenses with, for example, work of attaching an attaching member to the body, thus simplifying the manufacturing process.
A portable radio device comprising:
A manufacturing method of a portable radio device body that has a cylindrical antenna attachment portion projecting outward from a body main part and which a cylindrical antenna having antenna elements formed on an outer circumferential surface thereof is attached to an inner circumferential surface of the antenna attachment portion, comprising the steps of:
Dependencies are inferred from the claim text.