Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1992-11-20
1995-01-31
Hajec, Donald
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
3437925, H01Q 928
Patent
active
053862155
ABSTRACT:
Efficient transmission and reception of electromagnetic radiation are achieved by an antenna on a substrate. An antenna is fabricated on the top surface of a substrate which includes a periodic dielectric structure. The antenna operates at a frequency within the band gap of the periodic dielectric structure. Radiation emitted by the antenna cannot propagate through the structure and is therefore emitted only into space away from the substrate. When the antenna is receiving, radiation striking the device does not propagate through the substrate but is concentrated at the antenna. A phased array with isolated elements is achieved by fabricating the array elements on top of a substrate having a periodic dielectric structure and by surrounding the circuits associated with each antenna element with the periodic dielectric structure. Radiation from an element or associated circuitry at a frequency within the band gap of the structure cannot propagate into the substrate to interfere with other elements.
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Hajec Donald
Ho Tan
Massachusetts Institute of Technology
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