Summary
International Symposium on Antennas and Propagation
2012
Session Number:1D3
Session:
Number:1D3-5
Parametric Analysis of the Radiation Characteristics of a Multiple-Folded Phased Array Antenna
Tadashi Takano, Tomoya Ishikawa, Hiroki Nishikawa, Kenji Saegusa, Hiroyuki Hosono,
pp.-
Publication Date:2012/10/29
Online ISSN:2188-5079
Summary:
A phased array antenna (PAA) with flat panel structure in the multiple- folding (MF) scheme can realize a significant improvement of the folded to deployed ratio better than aperture antennas. But MF-PAA suffers from the phase difference between panels. We proposed the concept of MF-PAA and the method to compensate the phase discrepancy due to panel steps by phasing. The previous paper described the basic configuration of MF-PAA, and the analysis of principal characteristics and application forms. In this paper, we generalize the concept of MF-PAA. The characteristics are analyzed for various values of step size. The simulation results show that a step between two panels can be compensated by the proposed method in the case of 30deg beam shift. Blocking effect due to a higher step, however, deteriorates the antenna characteristics for a large step of ??/2. An entire array antenna composed of nine panels in multiple- folding scheme with actual steps is simulated so that more realistic estimation will be possible. The analysis results show that the antenna has excellent characteristics which are almost the same as a flat array antenna on a single plane. From these facts, the availability of MF-PAA is confirmed. Also important implication has been obtained. As the blocking effect is significant, large step should be avoided by the deliberate design of panels and folding scheme, especially for antennas with a small number of elements.