COMBINATION ANTENNA AND METHODS
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United States of America Patent
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app pub date -
Sep 17, 2009
filing date -
Sep 25, 2008
priority date (Note) -
Abandoned
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Abstract
An antenna combination especially intended for small radio devices. It comprises a main antenna, the radiator (320) of which is a conductive part of the outer cover of the device, and a second antenna to enable simultaneous operation in the frequency bands close to each other. The second antenna is a narrow ILA, and its radiator (330) is placed in a slot (SLT) between the radiator (320) of the main antenna and the rest (COV) of the cover. The matching circuits of the antennas are implemented so that they function at the same time as filters, which enhance the electric isolation of the antennas. A second antenna can be added to a radio device with a cover radiator so that its radiator does not require extra space, and the electric isolation between the antennas is good despite the closeness of their radiators.
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