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In this paper, the effects of 2-D photonic crystal substrate on the performance of a rectangular microstrip patch antenna at terahertz frequency (0.4-0.8THz) has been investigated. The photonic substrate has been used to enhance the gain and radiation efficiency of the proposed antenna. The gain and radiation efficiency of this antenna at 600 GHz is about 13dB and 83.02%, respectively. This antenna...
In this paper, a dielectric slab with the periodic implantation of the air gap in the host passive substrate material has been analyzed. The effective permittivity of the photonic crystal with host material PTFE at 600 GHz has been extracted with the help of robust method to retrieve the constitutive effective parameters of the metamaterials. Based on the extracted effective permittivity, a rectangular...
In this paper improved performance microstrip square patch antenna at terahertz frequency range has been analyzed. The antenna has been designed to radiate at any frequency point in the frequency band of 0.5 to 0.7 THz with high gain and radiation efficiency. The effect of various parameters of substrate on radiating patch has been investigated. Gain and radiation efficiency of 21.87 dB and 94.45%...
In this paper, an effective dielectric permittivity and losses of two-layer substrate for rectangular microstrip patch antenna at THz frequency has been analyzed and simulated in the terahertz frequency regime surveillance system. The proposed antenna has been optimized at 600 GHz frequency by CST Microwave Studio a commercially available simulator based on finite integral technique. To validate the...
In this paper, the effects of shorting pin on resonant frequency of the gap-coupled circular microstrip patch antennas is presented. The effects of location of shorting pin and variations of its diameter as well as the effect of variation of gap distance between adjacent edges of the feed patch and parasitic patch of gap-coupled circular microstrip patch antennas on the resonant frequency is simulated...
OFDM digital communication system is highly frequency sensitive to carrier frequency offset between transmitter and receiver local oscillators, which disturbs orthogonality among carriers. Consequently, the performance of OFDM system is reduced greatly due to inter-carrier-interference (ICI). In this paper, we have presented a novel approach for the frequency offset estimation of the OFDM communication...
In this paper, we have simulated 2D photonic crystal (dielectric slab with regular cylindrical periodic lattice of air-gap) as substrate to enhance the electrical performance of the microstrip (rectangular or circular) patch antenna at THz/millimeter wave frequencies. The periodic structures designed to open up frequency bands within which the propagation of electromagnetic waves is forbidden irrespective...
The effect of multilayer, 2-D photonic band gap substrate on the performance of rectangular microstrip patch antenna at THz frequency is simulated. The radiation efficiency, gain and directivity for the proposed antennas are 93.28%, 10.46 dB and 10.76 dBi, respectively at 875 GHz. The 10 dB impedance bandwidth of the antenna is 36.67%, which is ultra-wide bandwidth. The simulation has been performed...
In this paper a survey of the gap-coupled microstrip antennas is presented. The need and types of gap-coupled microstrip antennas with recent research overview is discussed. By using the concept of gap-coupling the bandwidth of microstrip antenna can be increased. In this one patch is fed and the parasitic patch is excited by the gap-coupling. The concept of increasing the bandwidth by gap-coupling...
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