Closed-Form Expression for First Null Beamwidth of a Beam-Steered Dolph–Tschebysheff Array. Issue 1 (2nd January 2016)

• Record Type: Journal Article
• Authors: Das, Tamal; Ghosh, Archit; Chatterjee, Soumyo; Chatterjee, Sayan
• Is Part Of: Electromagnetics. Volume 36:Issue 1(2016)
• Page Start: 1
• Page End: 16
• Publication Date: 2016-01-02
• Subjects: Dolph–Tschebysheff array -- beam steered -- closed-form expression -- first null beamwidth -- steering factor; Electromagnetism -- Periodicals; 537
• DOI: 10.1080/02726343.2016.1115385
• Languages: English
• ISSNs: 0272-6343

Abstract

ABSTRACT: In this article, a closed-form expression for the first null beamwidth of a beam steered Dolph–Tschebysheff linear array antenna has been presented, where the number of elements, uniform inter-element spacing, side lobe level (in dB), and steering angle are considered as design parameters. Accordingly, the limitation in the beam-steering capability of a Dolph–Tschebysheff linear array has been modeled computationally. First null beamwidth values obtained using the proposed formula has been compared with that obtained from a conventional array factor plot. Results shows at least 95% accuracy in predicting the value of first null beamwidth and maximum steering angle under particular design constraints showing the effectiveness of the proposed formulas.