A Low-Profile HF Meandered Dipole Antenna with a Ferrite-Loaded Artificial Magnetic Conductor

Abstract

In this paper, a low-profile HF (high-frequency) meandered dipole antenna with a ferrite-loaded artificial magnetic conductor (AMC) is proposed. To operate in the HF band while retaining a compact size, ferrite with high permeability is applied to the unit cell of the AMC. The operating frequency bandwidth of the designed unit cell of the AMC is 1.89:1 (19–36 MHz). Thereafter, a meandered dipole antenna is designed by implementing a binary genetic algorithm and is combined with the AMC. The overall size of the designed antenna is 0.06×0.06×0.002 λ3 at the lowest operating frequency. The proposed dipole antenna with a ferrite-loaded AMC is fabricated and measured. The measured VSWR bandwidth (<3) covers 20–30 MHz on the HF band. To confirm the performance of the antenna, a reference monopole antenna which operates on the HF band was selected, and the measured receiving power is compared with the result of the proposed antenna with the AMC.

Dipole Antenna With 18×5 Square Electromagnetic Band Gap for Applications Used in Monitoring Children Trapped in Cars

“…The study and design of the dipole antenna structure compatible with rectangular EBG plates compared with the previous research are shown in Table 4. It was found that the study had some advantages compared to the other researches: the structural dimensions of the EBG plate, the distance from the dipole antenna to the EBG plate, except [13], 42.30 mm, and a greater gain except research [16].…”

“…A meandered dipole antenna for the use at 19-36 MHz was compatible with 18 × 18 units of artificial magnetic conductor (AMC) band plates. With EBG placed at a distance of 18 mm from the antenna, a gain value ranged from 22.20 to 16 dBi which radiated energy in a directional radiation pattern [16]. A shared-aperture Fabry-Perot cavity antenna (FPCA) for the use at 3.45 GHz and 5 GHz was combined with partially reflective surface (PRS), 8 × 8 units frequency selective surface (FSS) electromagnetic band plates.…”

A Circular Sector-Shaped Dipole Antenna with Meandered Arms and Added Ferrite-Loaded Artificial Magnetic Conductor

“…Furthermore, when an AMC is used as a reflector, the image current on its surface is formed in an identical direction as that of the antenna, and the phase of the incident and reflected waves are also identical; thus, the low-profile characteristics of the antenna can be achieved [17,18]. Miniaturized antennas have been proposed in the HF, VHF and UHF bands using the characteristics of the AMC [19][20][21].…”

“…The configuration of the meandered arm was optimally designed using a binary genetic algorithm, so that the antenna satisfies the VSWR characteristics of 3.5:1 or less in the HF, VHF, and UHF bands. Compared with the previous studies [19,20], the size and operating bandwidth characteristics are improved from those of the study [19], and it operates at the lowest operating frequency, lower than the antenna of the study [20]. All the simulations in this study were conducted using the CST software.…”

Hybrid Nearest-Neighbor Ant Colony Optimization Algorithm for Enhancing Load Balancing Task Management

“…Lately, PSO has been used to solve real-world engineering problems such as the design of multilayered rectangular microstrip antenna using electromagnetic band-gap (EBG) structures [29], and bandwidth improvement of an inverted-F antenna (IFA) [30]. Furthermore, the PSO algorithm is also able to design new engineering components, for example, artificial magnetic conductors [31].…”