Motorola Corporation

Paloma I Lampert

David H Minasi

Jan-Ove U Mattsson

An antenna structure () that includes a Planar Inverted-F Antenna (PIFA) () and an extendable portion such as a whip element (). The PIFA () operates normally when the extendable portion () is retracted and upon extension, an electrical contact is made between the extendable portion () and the end () of the PIFA () that is electrically opposite, i.e., furthest along the electrically conductive path of the PIFA, from the feed structure () for the PIFA (). The electrical length of the composite antenna () is then substantially equal to the sum of the electrical length of the PIFA () and extendable portion (). An embodiment disconnects the ground path of the PIFA feed structure upon extension of the extendable portion () to provide constant input impedance.

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Plantation, FL, United States of America

Paloma I Lampert