Octave Bandwidth Printed
Circuit Phased Array Element
December 2005
Paul G. Elliot, The MITRE Corporation
Anatoliy E. Rzhanov, Magnetic Sciences
ABSTRACT
A printed-circuit radiating element for wideband phased array antennas
is described which provides a well-matched impedance bandwidth of approximately
one octave in the array environment. The main benefit compared to existing
octave or more bandwidth array elements (e.g. flared notch, tapered
slot or Vivaldi antenna) is that this new element can be etched onto
panels that lie parallel to the plane of the array, permitting several
rows and columns of elements on the same substrate which reduces cost
significantly. Also the array thickness is reduced, and the phase center
does not move with frequency. The element can provide polarization diversity.
A new low-dielectric constant syntactic foam material was also tested
and found to be suitable for plated-thru via holes and bonding for microwave
printed-circuits.
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