Soft Surfaces for Reducing Mutual Coupling Between Loaded PIFA Antennas Articles uri icon

publication date

  • June 2010

start page

  • 91

end page

  • 94

volume

  • 9

international standard serial number (ISSN)

  • 1536-1225

electronic international standard serial number (EISSN)

  • 1548-5757

abstract

  • The use of planar soft surfaces to reduce mutual coupling in a new type of planar inverted-F antenna (PIFA) is demonstrated in this work. The proposed antenna is dual-band, single-port, and quite compact,
    especially for the low frequency of operation. At that frequency band,
    the mutual coupling is more critical. With the purpose of decreasing
    this coupling, a solution based on soft surfaces made of simple printed
    strips with grounded vias is presented, achieving a simultaneous
    reduction on the mutual coupling level at the two bands of operation of
    the antenna. In this particular example, only two strips are used and a
    reduction on the coupling of more than 6 dB is experimentally verified
    for these two bands and for different distances between elements. The
    use of a multilayer substrate is a key aspect in the proposed design.