PIFA device for providing optimized frequency characteristics in a multi-frequency environment and method for controlling the same
First Claim
1. An apparatus for providing optimized frequency characteristics in a multi-frequency environment in a mobile communication terminal, comprising:
- a memory for storing frequency characteristic compensation values for optimizing antenna frequency characteristics of the mobile communication terminal on a frequency band basis in the multi-frequency environment;
a Planar Inverted-F Antenna (PIFA) device for varying a distance between feeding and shorting pins; and
a controller adjusting the distance between the feeding and shorting pins based on a frequency characteristic compensation value mapped to a frequency band currently being used in the mobile communication terminal, wherein the frequency characteristic compensation values comprise shorting pin position information set according to distances from the feeding pin on a frequency basis such that the PIFA device can provide optimal frequency characteristics.
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Accused Products
Abstract
A Planar Inverted-F Antenna (PIFA) device and a method for controlling the PIFA device that can provide optimized frequency characteristics in a multi-frequency environment. The PIFA device is provided with a plurality of shorting pins located at different distances from a feeding pin and an antenna switch capable of selecting one of the shorting pins, or is provided with an antenna switch capable of moving a shorting pin to a preset position, thereby adjusting a distance between the feeding and shorting points. Antenna frequency characteristics can be optimized according to a frequency band used at the current location, and the antenna frequency characteristics can be optimally maintained in the multi-frequency environment at any time.
20 Citations
15 Claims
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1. An apparatus for providing optimized frequency characteristics in a multi-frequency environment in a mobile communication terminal, comprising:
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a memory for storing frequency characteristic compensation values for optimizing antenna frequency characteristics of the mobile communication terminal on a frequency band basis in the multi-frequency environment; a Planar Inverted-F Antenna (PIFA) device for varying a distance between feeding and shorting pins; and a controller adjusting the distance between the feeding and shorting pins based on a frequency characteristic compensation value mapped to a frequency band currently being used in the mobile communication terminal, wherein the frequency characteristic compensation values comprise shorting pin position information set according to distances from the feeding pin on a frequency basis such that the PIFA device can provide optimal frequency characteristics. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for controlling a Planar Inverted-F Antenna (PIFA) in a mobile communication terminal provided with a PIFA device for varying a distance between feeding and shorting pins, comprising the steps of:
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changing a frequency band according to location of the mobile communication terminal; determining if an operating state of the mobile communication terminal requires frequency characteristic compensation for the PIFA in the changed frequency band; loading a frequency characteristic compensation value according to a current operating state if the operating state requires the frequency characteristic compensation; adjusting the distance between the feeding and shorting pins according to the loaded frequency characteristic compensation value; determining if the operating state of the mobile communication terminal has ended; and recovering compensated frequency characteristics according to the op crating state of the mobile communication terminal if the operating state of the mobile communication terminal has been ended. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification