Abstract
Perfect magnetic conductors (PMCs) can help in the enhancement of antenna impedance bandwidth using their capability of reflecting the incident waves without phase reversal. The purpose of this paper is to show the advantages of using a perfect magnetic conductor in antenna engineering. The goal is to use it in waveguide-fed slot array antennas, increasing both the antenna impedance and radiation bandwidths. To this aim, a PMC-based rectangular waveguide composed of longitudinal slots is convenient. The impedance of the proposed array structure is calculated analytically. To compare analytical results with the simulation results, PEC- and PMC-based waveguide-fed slot arrays are designed and simulated in a certain frequency band. The simulation results are in good agreement with the theoretical predictions.
Highlights
Waveguide-fed slot arrays have been widely used in many spacecraft and radar applications due to the advantages of high efficiency, low weight, low profile, ease of manufacture, and rigid structure [1,2,3]
Introducing metamaterials based on theory of negative index materials opened the way for many researcher groups all over the world to improve the operational performances of the electromagnetic-based devices [4,5,6,7]
Several researcher groups have focused on metamaterial realization of the artificial magnetic conductors (AMCs) [8,9,10,11]
Summary
Waveguide-fed slot arrays have been widely used in many spacecraft and radar applications due to the advantages of high efficiency, low weight, low profile, ease of manufacture, and rigid structure [1,2,3]. Several researcher groups have focused on metamaterial realization of the artificial magnetic conductors (AMCs) [8,9,10,11]. It was demonstrated in [12, 13] that artificial magnetic conductor can be realized using a volumetric metamaterial constructed from a periodic arrangement of the capacitively loaded loop (CLL) elements. It provides a very large number of applications in antenna engineering. A perfect magnetic conductor (PMC) does not exist in nature, the possibility to create artificial magnetic conductor (AMC) using engineered structures is promising [14]
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