Journal Article

Frequency-invariant pattern synthesis of conformal array antenna with low cross-polarisation

Guo, Y., Wang, B.-H., Wang, Y.-L., Lin, Y.-Z.

2008

Overview

Despite their potential and promising advantages over classical planar arrays, conformal arrays also present many challenges to the antenna designer, including varying element normal due to curvature, serious cross-polarisation effect, limited operational bandwidth and so on. A uniform method for the element polarised pattern transformation of arbitrary 3D conformal arrays is presented based on Euler rotation. A space-timepolarisation filter structure is proposed for the pattern synthesis of conformal array, in which the finite impulse response filters assigned to every element are used to acquire the frequency-invariant array pattern and the element polarisation diversity in array global coordinates is used to depress the cross-polarisation level. The optimal weight vector is obtained by alternating projection method. The alternating projection method is a powerful and attractive method for the pattern synthesis in that it requires relatively smaller amount of computation burden and a wide variety of desirable constraints can be freely implemented in a visible way, which is usually impossible for other optimisation method.

• Publisher: Institution of Engineering and Technology,The Institution of Engineering & Technology
• Subject: Antenna arrays / Antennas / Applied sciences / Arrays / Circuit properties / Electric, optical and optoelectronic circuits / Electronic circuits / Electronics / Exact sciences and technology / Frequency filters / Mathematical analysis / Optimization / Oscillators, resonators, synthetizers / Projection / Radiocommunications / Synthesis / Telecommunications / Telecommunications and information theory / Three dimensional