Abstract
In this paper, a novel design of a co-polarized transmission window within the cross-polarized reflection band of a polarization converted meta-surface (PCM) is presented. First, a dual-band reflective polarization converted meta-surface is designed. In each band, the incoming linearly-polarized electromagnetic wave will be efficiently reflected with its cross-polarized state. The two bands are separated by a co-polarized reflective band. Second, a pass-band frequency selective surface (FSS) with the high-selective response is constructed. Its operating pass-band is positioned in the same range as the co-polarized reflective band of the PCM. Third, the reflected PCM without metal backing is integrated with the pass-band FSS, namely, a novel dual-band reflected PCM with a transmission window is realized. The -0.5dB-bandwidths of the two cross-polarized reflective bands are about 3.8 GHz (5.66~9.46GHz) and 2.0 GHz (16.9~18.9GHz), respectively. The -3-dB bandwidth of the transmission window is approximately 1.35 GHz (12.2~13.55 GHz). Lastly, the proposed structure prototype is fabricated and tested. The measured results are in good agreement with the simulated ones. In addition, the principle of operation and detailed design is also presented and discussed.
Highlights
Frequency selective surfaces (FSSs) have been the subject of intensive study because of potential military and other different applications ranging from microwave systems to radar and satellite communications [1]–[10]
We present a dual-band, FSS-backed, polarization converted meta-surface, which is different from other ones with metallic reflective backing
The FSS is composed of two F4B-2 substrates with the same parameters as that used in simulations
Summary
Frequency selective surfaces (FSSs) have been the subject of intensive study because of potential military and other different applications ranging from microwave systems to radar and satellite communications [1]–[10]. FSSs as frequency selective materials have been used in stealth technology for reducing the radar cross section (RCS) of communications systems. When the electromagnetic (EM) wave within the FSS’s stop band, is illuminated on the surface of radome, the EM wave will be reflected. If the incidence angle is larger than zero, the incidence wave will be reflected along symmetric direction with respect to incident direction, the radome is invisible. The radomes are visible for normal incidence waves, because the incoming wave will be reflected along its same way, as described in Fig. (a)
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