Clavin element with impedance monopoles

Two-Frequency Operating Mode of Antenna Arrays With Radiators of Clavin Type and Switching Vibrator and Slot Elements

“…These parameters are achieved due to the lower radiation level along the screen plane than that obtained in [5]. The simulation results obtained in [9] have shown that there exist several pairs of parameters L v /λ and y v /λ for which the shapes of radiation patterns (RPs) can differ even if the level of lateral radiation is constant. As a result of complex simulation [9], it is also found that the requirement of the RPs similarity in the main planes can be satisfied if L v = 0.3125λ, y v = 0.086λ with the level of lateral radiation −20 dB and L v = 0.3125λ, y v = 0.086λ with the level −31 dB.…”

“…The simulation results obtained in [9] have shown that there exist several pairs of parameters L v /λ and y v /λ for which the shapes of radiation patterns (RPs) can differ even if the level of lateral radiation is constant. As a result of complex simulation [9], it is also found that the requirement of the RPs similarity in the main planes can be satisfied if L v = 0.3125λ, y v = 0.086λ with the level of lateral radiation −20 dB and L v = 0.3125λ, y v = 0.086λ with the level −31 dB. Note that the RPs have similar widths in the first case, while the similar RPs with the lowest levels of lateral radiation are observed in the second case.…”

“…Analytical formulas applicable to simulation of the vibrator-slot structure (Fig. 1) are obtained by the authors based on the method of induced electro-magneto-motive forces (EMMF) [9,10]. Consider the monochromatic excitation of the combined radiator by a plane wave when the fields and currents depend on time t as e iωt (ω is the circular frequency).…”

“…Consider the monochromatic excitation of the combined radiator by a plane wave when the fields and currents depend on time t as e iωt (ω is the circular frequency). In a spherical coordinate system (R, θ, ϕ), the electric field of the radiator in the far zone (R λ) can be presented as [9]:…”

“…The RPs (radiation patterns) of the Clavin antenna element with perfectly conducting monopoles in Eand H-planes were shown to be almost identical [5][6][7]. The influence of the electric lengths of impedance monopoles and the distance between the Clavin type elements was analyzed under conditions that the level of lateral radiation in the E-plane, and the difference in the widths of the RP in main planes at the level of −3 dB was taken into account [9,10]. However, application of a Clavin radiator in combined antenna array has not been studied.…”