Filter including a microstrip antenna and a frequency selective

Details Filter including a microstrip antenna and a frequency selective Filter including a microstrip antenna and a frequency selective

1998-07-15

2000-11-14

Pascal, Robert

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333202, 343909, H01P 1213, H01P 120, H01Q 1522

Patent

active

061475726

ABSTRACT:
A filter including an enclosure, a dielectric material within the enclosure, at least two microstrip antennas within the enclosure, and at least one frequency selective surface including a metallic pattern. The frequency selective surface is utilized to filter an electromagnetic signal propagated within the enclosure. The geometry of the antennas and the frequency selective surfaces as well as the resonant frequencies of the frequency selective surfaces determine whether the filter is a bandpass, bandstop, notched, or combination filter. If the frequency selective surface is omitted, the combination acts as a delay circuit for delaying the electromagnetic signal, where the time delay is a function of the dielectric constant of the dielectric material.

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