Line Source Antenna for Electronic Beam Scanning.
DEPARTMENT OF THE ARMY WASHINGTON DC
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The basic principles and operation of the monolithic line source antenna array with radiating slots, as covered by this application, are the same as described in US Patent 4,092,647, which is incorporated by reference. Structural differences are described below. The principal change is that in place of a separate ferrite phase shifter in each cell between adjacent slots, a single long ferrite toroid is utilized for all of the cells and slots. a ferrite phase shift element with matching transformers is shown. It comprises the ferrite toroid 10 and two dielectric matching transformers 12 at the ends. A hole 14 is provided for the switching wire. A cross-sectional view of the toroid is also shown. The inside of the toroid 10 is filled with a dielectric material 16. A monolithic line source antenna array having 15 radiating slots is shown. It is formed by either enclosing the phase shift element in a close fitting waveguide housing, or alternatively by applying a metal coating to the phase shift element. The fifteen slots 20 are formed through the metal on one of the broad faces. The switching wire 18 extends through the hole of the toroid. The dielectric matching transformers 12 are not shown. Author
- Electrical and Electronic Equipment