Volume 19, Issue 4 (December 2023)                   IJEEE 2023, 19(4): 1-11 | Back to browse issues page

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Sohrabi A, dashti H, Ahmadi-shokouh J. An Active VHF and UHF Electrically Small Horn Antenna Using Non-Foster Matching Circuit. IJEEE 2023; 19 (4) :1-11
URL: http://ijeee.iust.ac.ir/article-1-2084-en.html
An Active VHF and UHF Electrically Small Horn Antenna Using Non-Foster Matching Circuit
Atefeh Sohrabi , Hamideh Dashti , Javad Ahmadi-shokouh
Abstract:   (1643 Views)
In this article, an active electrically small Horn antenna for very high frequency (VHF) and ultra-high frequency (UHF) frequencies is presented. The proposed horn antenna has a height of 5 cm and a diameter of 4.28 cm which can cover 6-12 GHz without a special active circuit with the VSWR of less than 2. A Non-foster Active Adaptation Circuit is used to reduce the antenna input frequency from 164 MHz to 880 MHz. Good matching is visible between the simulation results and the measurement of the antenna reflection coefficient with the active matching circuit. The proposed structure has more than 137 % bandwidth. With the proposed active antenna, the problem of non-portability of VHF and UHF Horn antenna antennas has been solved. Finally, by analyzing the time domain, the stability of the circuit is examined, and the results of the stability test show that the system, including the antenna and the circuit, is stable. The antenna and the matching circuits are simulated by CST microwave studio and advanced design system, respectively.
Keywords: Non-foster, dual-ridged Horn Antenna, VHF, UHF, small antenna.
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Type of Study: Research Paper | Subject: Antenna
Received: 2021/01/12 | Revised: 2024/04/20 | Accepted: 2023/10/15
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Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
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© 2022 by the authors. Licensee IUST, Tehran, Iran. This is an open access journal distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license.