Open AccessDesign of a broad‐band microstrip loop antennas with less‐dispersive group velocity for accurate direction finding
Author(s) -
Yoo Sungjun,
Byun Gangil,
Choo Hosung
Publication year - 2019
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2019.0640
Subject(s) - microstrip , microstrip antenna , loop (graph theory) , group velocity , group delay and phase delay , antenna (radio) , acoustics , multi band device , interferometry , phase (matter) , physics , patch antenna , optics , frequency band , electronic engineering , computer science , engineering , telecommunications , bandwidth (computing) , mathematics , combinatorics , quantum mechanics
This study proposes the design of broad‐band microstrip loop antennas with less‐dispersive group velocity of radiation patterns for accurate direction of arrival (DoA) estimation. The proposed structure consists of radiating and feeding microstrip loops, and the radiating loop is electromagnetically coupled to the feeding loop. This feeding mechanism helps to suppress phase variations of radiating patterns by avoiding dual resonances within a wide frequency band over 60 MHz, which allows to obtain the less‐dispersive group velocity for accurate DoA estimation. The effectiveness of the less‐dispersive behaviour is validated by implementing the proposed structure into a four‐element array to estimate vertical and horizontal placements using dual‐axis phase interferometry. The results confirm that the proposed antenna has less‐dispersive group velocity compared to a conventional microstrip patch antenna and is more suitable for accurate DoA estimation.