| 摘要 |
A true-time-delay corporate feed (10) that minimizes both scan- and frequency-dependent variations in driving point impedance by realizing and exploiting a folded ensemble of intentionally mismatched E-plane tee junctions (13), E-plane steps (14), and E-plane bends (15) that are used to form the antenna feed. A selected arrangement of E-plane tee junctions, E-plane steps, and E-plane bends are interconnected between a line-source interface (11a) that receives RF power and a plurality of line-source interfaces (11b) that couple the RF power to radiating stubs of a continuous transverse stub antenna array (30). The impedance of the individual mismatched components are set to be essentially constant and purely real, such that the feed network ensemble behaves as a multi-stage transformer, efficiently matching dissimilar radiator (load) and line-source (source) impedances over a broad range of operating frequencies and scan angles.
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