Claims
- 1. An antenna device comprising:
- a parabolic secondary reflector having a focal point;
- a single dielectric substrate, said single dielectric substrate defining a plane;
- an array of antenna elements mounted on said single dielectric substrate substantially at said focal point of said parabolic secondary reflector, each of said antenna elements comprising a plurality of patches interconnected in a direction transverse to said array; and
- a scanning control circuit for selecting the antenna elements in a time-sharing fashion wherein each antenna element radiates a beam towards the parabolic secondary reflector at a predetermined angle to said plane when selected by said scanning control circuit, and wherein the beam is reflected by said parabolic secondary reflector as a scanning beam such that as said scanning control circuit selects said antenna elements in said time-sharing fashion said scanning beam scans across said plane.
- 2. The antenna device of claim 1 wherein said scanning control circuit includes a plurality of field effect transistors for selecting said antenna elements in said time-sharing fashion.
- 3. The antenna device of claim 1 further comprising a plurality of circulators mounted on said dielectric substrate and connected in series to said antenna elements, respectively wherein said circulators are arranged in pairs of adjacent circulators, said circulators in each of the pairs being arranged such that DC magnetic fields in mutually opposite directions are applied to the circulators, respectively, for rotating signals in mutually opposite directions in the circulators.
- 4. An antenna device comprising:
- a secondary radiator;
- a single dielectric substrate, said single dielectric substrate defining a plane;
- an array of antenna elements mounted on said single dielectric substrate, each of said antenna elements comprising at least one patch arranged transverse to said array; and
- a scanning control circuit for selecting the antenna elements in a time-sharing fashion wherein each antenna element radiates a beam towards the secondary radiator at a predetermined angle to said plane when selected by said scanning control circuit, and wherein the beam is radiated by said secondary radiator as a scanning beam such that as said scanning control circuit selects said antenna elements in said time-sharing fashion said scanning beam scans across said plane.
- 5. The antenna device of claim 4 wherein said scanning control circuit includes a plurality of field effect transistors for selecting said antenna elements in said time-sharing fashion.
- 6. The antenna device of claim 4 further comprising a plurality of circulators mounted on said dielectric substrate and connected in series to said antenna elements, respectively wherein said circulators are arranged in pairs of adjacent circulators, said circulators in each of the pairs being arranged such that DC magnetic fields in mutually opposite directions are applied to the circulators, respectively, for rotating signals in mutually opposite directions in the circulators.
Priority Claims (2)
Number |
Date |
Country |
Kind |
7-090252 |
Mar 1995 |
JPX |
|
7-23931 |
Aug 1995 |
JPX |
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Parent Case Info
This is a divisional of application Ser. No. 08/611,665, filed Mar. 6, 1996, U.S. Pat. No. 5,724,042.
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Entry |
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Divisions (1)
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Number |
Date |
Country |
Parent |
611665 |
Mar 1996 |
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