Title :
A Scan Blindness Model for Single-Polarized Tapered-Slot Arrays in Triangular Grids
Author :
Ellgardt, Anders
Author_Institution :
Sch. of Electr. Eng., R. Inst. of Technol., Stockholm
Abstract :
A simple model is presented that predicts scan blindness in the E-plane for single polarized tapered-slot arrays where the elements are positioned in a triangular grid. The blindness occurs when the phase progression along the dielectric substrates is equal to the phase progression of a leaky mode in the structure. A simple equation is presented that estimates the frequency at which the scan blindness occurs for a given angle in the E-plane. This equation is derived from a simple representation of the phased array antenna, but includes the dominant effect of this particular class of scan blindness. The method is shown to agree well with computed results obtained with two different numerical codes.
Keywords :
dielectric materials; slot antenna arrays; substrates; dielectric substrates; numerical codes; phase progression; phased array antenna; scan blindness model; single-polarized tapered-slot arrays; triangular grids; Antenna arrays; Arrayed waveguide gratings; Bandwidth; Blindness; Broadband antennas; Dielectric substrates; Equations; Frequency estimation; Phased arrays; Resonance; Array; broadband-antennas; scan blindness; tapered-slot; triangular grid;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2008.928780