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| Honeycomb structure of aromatic polyimide |
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| Intercalation of small graphite flakes with a metal halide |
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| Field programmable logic and analogic integrated circuit |
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| Voltage divider in thin- or thick-film technology |
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| Process for making a magnetic material containing carpet tile and carpet tile |
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Dual mode radio frequency-infrared frequency system
| Details |
Inventors: Brumbaugh, Charles T.; Pittenger, Robert L.; Klees, Robert M.;
Assignee: The United States of America as represented by the Secretary of the Air (Washington, DC)
Primary Examiner: Lieberman; Eli
Assistant Examiner:
Attorney, Agent or Firm: Singer; Donald J., Erlich; Jacob N.
A combined RF/IR system in which a common surface is used in the dual modes of radiating and absorbing RF energy and of reflecting and focusing IR energy. The common surface is structured, configured, and used as the slotted array antenna for the RF energy and as the primary mirror of a Cassegrain optical subsystem for the IR energy. |
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DETAILED DESCRIPTION OF THE DRAWING FIG.
1 is a side-elevation view, in simplified pictorial and schematic form, partially in cross section and partially fragmented, of a preferred embodiment of the instant invention; FIG.
2 is the front view, in simplified pictorial and schematic form, of the combined RF antenna and IR primary mirror, showing that a portion thereof is obscured in use; FIG.
3 is a schematic representation of a stripline monopulse beam forming network component of the preferred embodiment; and FIG.
4 is a pictorial representation of the curved surface delay lines used in the preferred embodiment.
DESCRIPTION OF THE PREFERRED EMBODIMENT With reference to FIG.
1, therein is shown a preferred embodiment 10 of the instant invention, a dual mode RF/IR energy seeker system.
The preferred embodiment 10, in the most basic and generic structural form, comprises: a means (generally designated 20) for seeking, sensing, and absorbing RF energy, with this means mounted on a gimbal means 12 and including an RF antenna 22 having a surface 24; and, means (generally desigated 40) for seeking, sensing, reflecting, and focusing IR energy 100, with this means 40 also mounted on gimbal means 12 and including a Cassegrain IR optical subsystem 42 having a primary mirror 44 with a surface 46, FIG.
2, and with this means 40 operably associated with RF energy means 20.
It is here to be noted that IR energy means 20 and RF energy means 40 are coaxial and always "look" at the same point (not shown) in their environment 200 (i.
e.
, space), because they are mounted on the same gimbal means 12 which comprises an inner gimbal member 12A and an outer gimbal member 12B.
It is here also to be noted that the surface 24 of the RF antenna 22, and the surface 46 of the primary mirror 44 of the IR optical subsystem 42, comprise one (and the same) surface.
Therefore, the surface is common to both means 20 and 40, and hereinafter that surface will be referred to as "S".
Now, with reference to FIGS.
1 and 2, only a centrally located portion of the common surface S is used as the IR reflector 44, i
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Radio 
