Abstract: A system and method for automatically regulating access control levels in an access control system based on prevailing security levels including homeland security levels, local environment situations such as crowds, rioting, looting, severe weather and temporal states such as workdays, weekends, holidays, and open houses.

Abstract: A system and method for automatically regulating access control levels in an access control system based on the threat level as determined by the Department of Homeland Security and/or their corresponding local offices.

Abstract: A system and method for automatically regulating access control levels in an access control system based on prevailing security levels including homeland security levels, local environment situations such as crowds, rioting, looting, severe weather and temporal states such as workdays, weekends, holidays, and open houses.

Abstract: An array antenna embodying on a dielectric support, a periodic succession parallel to an alignment direction of rectangular patches having alternating active patches and parasitic patches. The active patches are identical, fed with electromagnetic energy in areas such that their sides parallel to the alignment direction are radiating sides, sized to have the same resonant frequency and disposed so that their phase centers are at a distance apart less than the wavelength in air associated with the resonant frequency. The parasitic patches are separated from the active patches by slots of constant non-null width extending transversely to the alignment direction and sized to have resonant frequencies near the resonant frequency of the active patches.