Design of a Wideband Coupled Feed Dipole Antenna for PCL Array Systems
- PDF / 1,820,604 Bytes
- 8 Pages / 595.276 x 790.866 pts Page_size
- 11 Downloads / 211 Views
ORIGINAL ARTICLE
Design of a Wideband Coupled Feed Dipole Antenna for PCL Array Systems Sungsik Wang1 · Junsik Park2 · Hongsuk Shim2 · Hosung Choo1 Received: 26 April 2020 / Revised: 4 June 2020 / Accepted: 28 July 2020 © The Korean Institute of Electrical Engineers 2020
Abstract This article proposes the design of a wideband coupled feed dipole antenna for Passive Coherent Location (PCL) systems. The proposed antenna consists of an internal direct feed dipole and an external coupled feed dipole. This coupled feed mechanism, which is often used in microstrip patch antennas, is applied to the dipole element for a wide matching bandwidth. To verify the operating principle of the proposed antenna, an equivalent circuit model is investigated along with some parametric studies of the coupling effect. The proposed antenna is then extended to an eight-element uniform circular array to confirm the beamforming performance for PCL systems. The results demonstrate that the coupled feed dipole element is more suitable to enhance the matching bandwidth compared to a conventional dipole antenna. Keywords PCL antennas · FM · Array antennas · Broadband antennas · Multiband antennas
1 Introduction Passive coherent location (PCL) systems are bistatic radars using commercial broadcasting signals including FM radio [1, 2] analog TV [3], digital TV [4–7] mobile communications [8], and satellite [9, 10]. PCL systems do not require additional transmitters unlike other typical active radars, which has the advantages of minimizing the exposure of observation sites while increasing the detection accuracy by multiple observation sites at a low cost. In addition, the use of the VHF frequency band allows PCL systems to detect long-range targets and counteract stealth technologies, such as RCS reduction and low altitude flight [11–13]. Many studies have been extensively conducted and reported to improve the PCL system performance in various ways. Among them, there have been several efforts to enhance
* Hosung Choo [email protected] Sungsik Wang [email protected] Junsik Park [email protected] 1
School of Electronic and Electrical Engineering, Hongik University, Seoul 121‑791, Republic of Korea
Hanwha Systems Co. Ltd, Seongnam, Korea
2
detection performance by improving the signal processing algorithms. Techniques for enhancing the detection efficiency using Doppler-sensitive cross-correlation has been studied [1], and recently, methods of mitigating interference, such as the multipath and clutter echoes by canceling sequential zero-Doppler signal components have also been proposed [14, 15]. On the other hand, some studies have focused on deriving the proper transmitter waveforms by checking self-ambiguity [16, 17], and efforts have also been made to increase received information in various ways, such as using polarization diversity [18, 19], spatial diversity [20], multistatic transmitters [6, 21], and multistatic receivers [4, 22]; however, these previous efforts mainly focused on performance improvement in terms of algorithms
Data Loading...
