The design of high-performance built-in diversity antennas are described for two types of portable telephones: over-the-shoulder and handheld type telephones. First, the fundamental characteristics of a planar inverted-F antenna (PIFA) are presented. This type of antenna was chosen as the diversity antenna element for its compactness. The diversity antennas for the over-the-shoulder telephone are described. Location optimization yields an average correlation coefficient of 0.25 and an average gain of -2.9 dBd in carrying. Next, the diversity antennas for the handheld telephone are presented. Experimental results show that even a 0.1-wavelength separation provides an average correlation coefficient of less than 0.5. The PIFA element location is also optimized to give an average gain of -6.8 dBd in speaking.


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    Title :

    Diversity antennas for portable telephones


    Additional title:

    Diversity-Antennen fuer tragbare Telephone


    Contributors:


    Publication date :

    1989


    Size :

    7 Seiten, 7 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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