Honeycomb cross-polarized load
OwnerJohn Fraschilla, David A. Whelaninventors
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Abstract
An impregnated carbon film expanded into a honeycomb structure is employed in a tapered notch phased array antenna and is used to absorb cross-polarized incident fields to reduce the reflections from shorted TEM parallel plate modes existing between radiator elements of the antenna. The carbon loading used to achieve this absorption may comprise a resistive taper, or analog circuit or anisotropic elements having a predetermined tapering resistive profile. The honeycomb cross-polarized load of the present invention provides the electrical performance necessary to meet tapered notch phased array antenna electrical requirements while reducing the weight and cost of antennas in which it is employed.
Claims19
A cross-polarization load for use in a tapered notch phased array antenna having a plurality of substantially parallel tapered notch radiating elements, said load comprising:
- a resistively tapering resistive element that is disposed between the radiating elements of the tapered notch phased array antenna that provides an absorbing transition to shorted TEM parallel plate modes present in a trough region between the radiating elements.
A tapered notch phased array antenna comprising:
- a plurality of substantially parallel tapered notch radiator elements disposed in an array such that a trough region is formed between adjacent radiator elements;
- a resistively tapering resistive element disposed in the trough region that forms a resistively tapering cross-polarization load that provides an absorbing transition that reduces reflections from shorted TEM parallel plate modes existing between the radiator elements of the tapered notch phased array antenna.
Dependencies are inferred from the claim text.