Retractable/extendable antenna unit having a conductive tube in a portable radiophone
First Claim
1. An antenna unit for a mobile communications terminal, comprising:
- an antenna housing extending from a main body of the mobile communications terminal, said antenna housing having therein a helical antenna;
a whip antenna disposed retractably and extendably with respect to said antenna housing, having at one end an insulator having a length shorter than a length of the helical antenna and at another end a rod antenna; and
a conductive tube disposed in a longitudinal direction of the main body below the antenna housing, for receiving said rod antenna in the retracted and extended position of said whip antenna, whereby said insulator is positioned within said helical antenna when said whip antenna is fully retracted into said antenna housing.
1 Assignment
0 Petitions
Accused Products
Abstract
A retractable/extendable antenna unit having a conductive tube for a mobile communication terminal with improved communication performance by means of an elongated rod antenna of a whip antenna in its extended position. The antenna unit has an antenna housing extending from a main body of the terminal, provided with an helical antenna; a whip antenna disposed retractably or extendably with respect to the antenna housing, having in its one end an insulator having a length shorter than that of the helical antenna and in its other end a rod antenna; and a conductive tube disposed in a longitudinal direction of the main body, for receiving the rod antenna. The insulator is positioned within the helical antenna when the whip antenna is fully retracted into the antenna housing. The antenna unit improves antenna performance and decreases SAR.
4 Citations
8 Claims
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1. An antenna unit for a mobile communications terminal, comprising:
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an antenna housing extending from a main body of the mobile communications terminal, said antenna housing having therein a helical antenna;
a whip antenna disposed retractably and extendably with respect to said antenna housing, having at one end an insulator having a length shorter than a length of the helical antenna and at another end a rod antenna; and
a conductive tube disposed in a longitudinal direction of the main body below the antenna housing, for receiving said rod antenna in the retracted and extended position of said whip antenna, whereby said insulator is positioned within said helical antenna when said whip antenna is fully retracted into said antenna housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification