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Journals and Conferences
In this paper, an analytical method to characterize the frequency behaviour of Composite Right/Left Handed (CRLH) loaded printed dipole antenna is presented. One needs to determine the parameters of ungrounded reactive components realizing CRLH structures. Efficient resonant RLC circuit models based on Partial Elements Theory are presented to calculate… (More)
Spiral phased array antenna nulling is presented. The array factor and classic method for spiral array antenna proposed here. Proposed method and genetic algorithm for optimization of fixed nulling in spiral array antenna are used and compared. The goal is to achieve a -20 dB in null over the wide frequency band. Our simulation shows -20 dB over 75 MHz null… (More)
A enetic algorithm is used for optimization of beam forming in linear array antennas. The goal is to achieve a narrow beam-width of about 1 degree with a linear array of parabolic antennas. Simulation shows about 80 % beam-width reduction.
In this paper we investigated the radiation effects of vest and whip VHF-LB antenna on human body. In order to simulate the human body we proposed two simple models. Measurements results confirm the simulations.
In this paper we proposed two vest VHF-LB antenna designs and compare it with whip antenna. We simulated the variety of situations for user, such as standing, sitting and lying on the earth. Measurements results of prototype implementation confirm the simulations.
In recent years, introducing metamaterials based on theory established by Veselago, opened the way for many researcher groups to enhance the antenna performances (Veselago, 1968; Veysi et al., 2010; Rafaei et al., 2010; Veysi et al., 2011; Rafaei et al., 2011; Jafargholi et al., 2010; Jafargholi et al., 2011). A standard procedure has been also established… (More)
The main problems in phased array antenna are mutual coupling and ground effects that destroys the designed radiation pattern. In this paper these undesired effects is compensated over 5 dB for mutual coupling effect and about 10 dB for both mutual coupling and ground effects in wide frequency band 30-88 MHz.