![]() ![]() The effects of the corrugated reflector on the current distribution along the helical arm and the radiation pattern are investigated. After the optimization, the PEC reflector is replaced with a corrugated reflector. This expression is suitable for CAD on desk.Īn axial-mode helical antenna backed by a perfect electric conductor (PEC reflector) is optimized to radiate a circularly polarized (CP) wave, using the finite-difference time-domain method (FDTDM). to circular microstrip patch fr 2.678 GHz. The % change in fr for spaced dielectric superstrate is 1.58% and 3.05 % for epsivr3 = 3.5 and 10.2 at h2/h = 1.5 w. Spaced dielectric effect on fr is more for small air-gap. The intention or unintentional air-gap brings down the fr of circular microstrip patch. Its effect is more on fr for small h2/h ratio. The effect of loaded ice on covered circular microstrip patch further lower down the resonant frequency. to circular microstrip patch is 1.96% and 9.52% respectively for epsivr2 = 2.32 & epsivr3 = 10.2 for epsivr1 = 2.94 & h2/h=9.52. The resonant frequency of circular microstrip antenna with cover dielectric decreases as h2/h increases. This paper presents the simple design expressions for circular microstrip patch with spaced dielectric and covered dielectric loaded with ice. Novelty/Improvements: In this paper a compact frequency reconfigurable microstrip patch antenna has been presented with less Return loss and high gain in compare with the conventional one. ![]() This antenna is capable of switching to six different frequencies viz. Findings: The proposed antenna exhibits multi-frequency behavior. The projected antenna has been designed using Taconic35 substrate with a relative dielectric constant of 3.5 and thickness of 1.52 mm. The antenna produced six different frequency bands between 4.1818 GHz to 7.2727 GHz at operating frequency 3.35 GHz. Three p-i-n diode has been introduced between these slots on the ground plane. Methods/Analysis: A reconfigurable microstrip patch antenna has been designed with slots cut in the ground plane. This antenna is capable of switching to six different frequencies. Background/Objectives: A frequency reconfigurable antenna is presented with operating frequency as 3.35 GHz. ![]()
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