Microstrip antenna system with fixed beam steering for rotating projectile radar system
US4686535A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 5, 1984 |
| Grant date | Aug 11, 1987 |
| Priority date | — |
| Expiry date | Sep 5, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/065
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A microstrip antenna system has a central two-dimensional array (preferably square having at least 16.times.16 elements) of integrally formed conductive dual slot microstrip radiator patches. A corporate-structured array of interconnected microstrip feedlines connects a common input/output r.f. signal feedpoint to each of the central array patches and also incorporates a fixed-angle phasing offset so as to steer the main lobe or beam of the overall radiation pattern off-center. The common r.f. signal input/output connection point is itself physically offset to one side of the overall composite of array elements. Auxiliary tapered amplitude linear arrays of dual slot patches also preferably extend on all sides outwardly from the periphery of the central array so as to reduce the side lobe amplitude and main lobe beamwidth of the overall radiation pattern. Both series-fed and series-tapped tapered amplitude feedlines are used depending upon whether the auxiliary linear array extends in the E-plane direction or the H-plane direction. The fixed phasing offset is preferably in the H-plane direction of the overall central array. Pairs of broad-banding microstrip stubs may be disposed alo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.