A Practical Approach for Design of a Wideband Microstrip Patch Antenna Conformed to Cylindrical Surface (original) (raw)
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The fringing field has an important effect on the accurate theoretical modeling and performance analysis of microstrip patch antennas. Though, fringing fields effects on the performance of antenna and its resonant frequency have been presented before, effects of curvature on fringing field have not been reported before. The effective dielectric constant is calculated using a conformal mapping technique for a conformal substrate printed on a cylindrical body. Furthermore, the effect of effective dielectric constant on the resonance frequency of the conformal microstrip antenna is also studied. Experimental results are compared to the analytical results for RT/duroid-5880 PTFE substrate material. Three different substrate materials RT/duroid-5880 PTFE, K-6098 Teflon/Glass, and Epsilam-10 ceramic-filled Teflon are used for verifying the new model.
2019 URSI Asia-Pacific Radio Science Conference (AP-RASC), 2019
In this paper, circularly polarized aperture coupled rectangular microstrip patch antenna for X-band application is proposed. Whenever planar antenna is conformed to cylindrical surface, antenna characteristics such as circular polarization gets disturbed. Proposed antenna design is printed on polyimide (varepsilonr=3.5)(\varepsilon_{r}=3.5)(varepsilonr=3.5) substrate separated by cross slotted ground plane. The conformal antenna design is simulated in CST microwave studio and is under fabrication.
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Curvature has a great effect on fringing field of a microstrip antenna and consequently fringing field affects effective dielectric constant and then all antenna parameters. A new mathematical model for input impedance, return loss, voltage standing wave ratio and electric and magnetic fields is introduced in this paper. These parameters are given for TM 10 mode and TM 01 mode Epsilam-10 ceramic-filled Teflon substrate material.
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