Design of a Broadband Coupled-Fed Printed Dipole Antenna as an Array Element for Direction Finding Systems

다국어 초록 (Multilingual Abstract)

This article proposes the design of a coupled-fed printed dipole antenna for direction finding (DF) systems. The antenna consists of a radiating 50 angled expanded-arm printed dipole as well as a fan-shaped feeder that is located on the opposite side of the radiating dipole. The 50 angled expanded-arm structure results in a wide beam-width and broadband-matching characteristics. The more the arm angle is bent, the wider the beam-width pattern. Note that the expanded structure to the side of the dipole arm allows the wide beam-width of the radiation pattern. The printed dipole is then electromagnetically coupled with the fan-shaped feeder to obtain broadband-matching characteristics. To obtain additional broadband-matching characteristics, the circular cavity and the four-step tapered structures of the radiating printed dipole are carefully tuned by considering the coupled fields induced by the indirect feeding structure. The reflection coefficients are −14.6 ㏈ and −11.9 ㏈ at 1.575 ㎓ and 2.4 ㎓, and the boresight gains are 4.8 ㏈i and 1 ㏈i, respectively. To confirm the DF capability of the proposed antenna, the pattern of the 4×4 arrays is observed by varying the steering angle.

목차 (Table of Contents)

• Abstract
• Ⅰ. INTRODUCTION
• Ⅱ. PROPOSED ANTENNA DESIGN AND MEASUREMENT
• Ⅲ. CONCLUSION
• REFERENCES