Broadband Circularly Polarized Bowtie Antenna Array Using Sequentially Rotated Technique | Zendy

Zhi-Ya Zhang | Zendy; Shaoli Zuo | Zendy; Yarui Zhao | Zendy; Lu-Yang Ji | Zendy; Guang Fu | Zendy

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Broadband Circularly Polarized Bowtie Antenna Array Using Sequentially Rotated Technique

Author(s) -

Zhi-Ya Zhang,

Shaoli Zuo,

Yarui Zhao,

Lu-Yang Ji,

Guang Fu

Publication year - 2018

Publication title -

ieee access

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.587

H-Index - 127

ISSN - 2169-3536

DOI - 10.1109/access.2018.2802938

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

A circularly polarized bowtie antenna array for wideband application is presented, which employs a dual-polarized bowtie antenna with electromagnetic coupling feed as the radiating element. By introducing a swallow-tailed feed-strip and an end vertical loading, a wide impedance bandwidth is achieved with a reduced antenna size, without using any impedance matching circuits. Four array elements are used in a 2 × 2 configuration to obtain high gain performance. To improve the axial ratio (AR), the array elements have been sequentially rotated. The proposed antenna has an impedance bandwidth for VSWR ≤ 1.5 of 46% ranging from 1.1 to 1.77 GHz. The AR results are better than 0.75 dB within the impedance bandwidth. The gain of the array varies from 10.8 to 12.2 dBi within the operating band. Acceptable agreement is found between the simulated and measured results, verifying the proposed design with wide impedance, AR, and gain bandwidths.

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