There have been a number of studies on phased array antennas and adaptive antennas as directional antennas that can be scanned electronically. However, these antenna systems require expensive phase shifters and power controllers, and their construction is complex. Small and relatively inexpensive antenna system, in which the beam is scanned or the beam direction is switched electronically, are expected for consumer applications. This research presents a compact feeding circuit for an antenna which enables its beam to be switched in three directions using lumped parameter elements. The circuit was designed and constructed in such a way that the transmission lines of two conventional rat-race circuits were replaced with phase shifters which utilize lumped elements. The proposed circuit has a single input port and four output ports for connection to the antennas, and can obtain phase differences of ±90° and 0° between antennas. The prototype was fabricated and evaluated at 1 GHz. The measured values were very consistent with the theory. The phase difference and magnitude errors between the antennas were -2.5 ~ +2.6°, -0.4.8 ~ +0.45dB with the SW1-setting, and -1.8 ~ +7.1°, -0.54 ~ +0.45dB with the SW3-setting. The area of the prototype fabricated this time was 8 × 7 mm, and reduced to 1/216 in comparison with the conventional circuit.
| Published in | Journal of Electrical and Electronic Engineering (Volume 10, Issue 4) |
| DOI | 10.11648/j.jeee.20221004.14 |
| Page(s) | 158-161 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2024. Published by Science Publishing Group |
Rat-Race Circuit, Hybrid Ring, Phase Shifter, Array Antenna, Multi Beam Antenna, Butler Matrix, Feeding Circuit, Phased Array antenna
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APA Style
Masatoshi Tsuji, Kota Motozuka. (2022). Compact Feeding Circuit for an Antenna That Achieves Three-Way Switchable Beam Directions Using Lumped Parameter Elements. Journal of Electrical and Electronic Engineering, 10(4), 158-161. https://doi.org/10.11648/j.jeee.20221004.14
ACS Style
Masatoshi Tsuji; Kota Motozuka. Compact Feeding Circuit for an Antenna That Achieves Three-Way Switchable Beam Directions Using Lumped Parameter Elements. J. Electr. Electron. Eng. 2022, 10(4), 158-161. doi: 10.11648/j.jeee.20221004.14
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Download@article{10.11648/j.jeee.20221004.14,
author = {Masatoshi Tsuji and Kota Motozuka},
title = {Compact Feeding Circuit for an Antenna That Achieves Three-Way Switchable Beam Directions Using Lumped Parameter Elements},
journal = {Journal of Electrical and Electronic Engineering},
volume = {10},
number = {4},
pages = {158-161},
doi = {10.11648/j.jeee.20221004.14},
url = {https://doi.org/10.11648/j.jeee.20221004.14},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.jeee.20221004.14},
abstract = {There have been a number of studies on phased array antennas and adaptive antennas as directional antennas that can be scanned electronically. However, these antenna systems require expensive phase shifters and power controllers, and their construction is complex. Small and relatively inexpensive antenna system, in which the beam is scanned or the beam direction is switched electronically, are expected for consumer applications. This research presents a compact feeding circuit for an antenna which enables its beam to be switched in three directions using lumped parameter elements. The circuit was designed and constructed in such a way that the transmission lines of two conventional rat-race circuits were replaced with phase shifters which utilize lumped elements. The proposed circuit has a single input port and four output ports for connection to the antennas, and can obtain phase differences of ±90° and 0° between antennas. The prototype was fabricated and evaluated at 1 GHz. The measured values were very consistent with the theory. The phase difference and magnitude errors between the antennas were -2.5 ~ +2.6°, -0.4.8 ~ +0.45dB with the SW1-setting, and -1.8 ~ +7.1°, -0.54 ~ +0.45dB with the SW3-setting. The area of the prototype fabricated this time was 8 × 7 mm, and reduced to 1/216 in comparison with the conventional circuit.},
year = {2022}
}
TY - JOUR T1 - Compact Feeding Circuit for an Antenna That Achieves Three-Way Switchable Beam Directions Using Lumped Parameter Elements AU - Masatoshi Tsuji AU - Kota Motozuka Y1 - 2022/08/17 PY - 2022 N1 - https://doi.org/10.11648/j.jeee.20221004.14 DO - 10.11648/j.jeee.20221004.14 T2 - Journal of Electrical and Electronic Engineering JF - Journal of Electrical and Electronic Engineering JO - Journal of Electrical and Electronic Engineering SP - 158 EP - 161 PB - Science Publishing Group SN - 2329-1605 UR - https://doi.org/10.11648/j.jeee.20221004.14 AB - There have been a number of studies on phased array antennas and adaptive antennas as directional antennas that can be scanned electronically. However, these antenna systems require expensive phase shifters and power controllers, and their construction is complex. Small and relatively inexpensive antenna system, in which the beam is scanned or the beam direction is switched electronically, are expected for consumer applications. This research presents a compact feeding circuit for an antenna which enables its beam to be switched in three directions using lumped parameter elements. The circuit was designed and constructed in such a way that the transmission lines of two conventional rat-race circuits were replaced with phase shifters which utilize lumped elements. The proposed circuit has a single input port and four output ports for connection to the antennas, and can obtain phase differences of ±90° and 0° between antennas. The prototype was fabricated and evaluated at 1 GHz. The measured values were very consistent with the theory. The phase difference and magnitude errors between the antennas were -2.5 ~ +2.6°, -0.4.8 ~ +0.45dB with the SW1-setting, and -1.8 ~ +7.1°, -0.54 ~ +0.45dB with the SW3-setting. The area of the prototype fabricated this time was 8 × 7 mm, and reduced to 1/216 in comparison with the conventional circuit. VL - 10 IS - 4 ER -
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