The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 02, 1995
Filed:
Sep. 23, 1993
Koichi Tsunekawa, Kanagawa, JP;
NTT Mobile Communications Network, Inc., Tokyo, JP;
Abstract
A dielectric plate 21 can be mounted on a housing 11 in such a manner that it is slidably retracted into the housing. A strip antenna element of an electrical length approximately equal to a quarter wavelength is formed on one side of the dielectric plate along one marginal edge thereof, and an antenna element 23 composed of a straight conductor portion 23a and a coil 23b connected at one end thereto is formed on the dielectric plate 21 just above the strip antenna element 22. The electrical length of the antenna element 23 is also equal to a quarter wavelength. A parallel twin-lead type feeder of a length nearly equal to the quarter wavelength is also formed on the dielectric plate 21 in parallel to the strip antenna element 22. The feeder 26 is connected at one end to inner ends of the antenna elements 22 and 23 and at the other end to a feeder 27 via contact pieces 29a and 29b. The feeder 27 is connected directly to a radio circuit 12 in the housing 11. When the dielectric plate 21 is at its fully retracted position in the housing 11, the contact piece 29b of the plus line 27b of the feeder 27 is in contact with the straight conductor portion 23a and the contact piece 29a of the minus line 27a is out of contact with the antenna element 22. The housing 11 is made of a conductive material.