A Geometrically-Appropriate Cavity Model for a Spherical Inverted-F Antenna (SIFA)

Rolando, David; Huff, Gregory H.

doi:10.1109/tap.2013.2246533

Cited by 2 publications

(3 citation statements)

References 20 publications

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“…12 Besides different shapes of patches, different types of antenna techniques, such as multilayer structure, same level ground and inverted-F, can be used for the spherical patch antennas. 13,14 Addition to the single spherical patch and spherical antenna array designs, it is also possible to design a spherical patch antenna with a quasi-isotropic radiation pattern by surrounding a thin dipole strip onto the spherical substrate. 15 The ground plane of the spherical antenna may be a full metal ball as an inner layer or a wide patch just under the radiating patch.…”

Section: Introductionmentioning

confidence: 99%

“…21 In order to analyse the conformal patch antennas on spherical surfaces, there are several analytical and numerical methods proposed in the literature. These methods can be summarized as follows: Method of moments (MoM), 9 Legendre series and Green functions, 10 Bessel and Hankel functions, 11 least mean squares, 12 transmission line model, 13 cavity model, 14 finite element method, 15 spherical harmonics functions, 16 Finite-difference time-domain method 17,18 , a hybrid technique that consists of MoM and finitedifference frequency-domain (FDFD) technique, 19 another hybrid technique including FDFD technique and a spectral domain approach 20 and MoM with Galerkin's approach. 21 However, most of them are theoretical or simulation-based studies.…”

Section: Introductionmentioning

confidence: 99%

“…[9][10][11][17][18][19][20][21] In Reference 12, a spherical array covered on the sphere is analysed and fabricated successfully but the proposed structure is naturally very complex in terms of both theory and application. Spherical patch antennas with simpler structures are proposed in, 13,14 but nevertheless they are not intended to be optimal design. A small conformed spherical tag antenna is designed and produced for RFID applications in Reference 15.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design and implementation of I‐slot conformal circular patch antenna on sphere structure

Başbuğ

2021

Int J RF Microw Comput Aided Eng

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In this article, an I-slot circular patch antenna conformed on a spherical structure is proposed. For the implementation of the proposed antenna, the polylactic acid (PLA) material is used with the help of a 3D printer. In accordance with this purpose, we determine the permittivity value of the PLA with a T-resonator method before the design process. Then, the geometrical design of the spherical patch antenna is optimized by means of a differential evolution algorithm. After the design and optimization process, the conformal spherical patch antenna is fabricated on a sphere cap. The main characteristics of the proposed antenna are given for both the simulations and the measurements. It is seen that the simulation results agree well with the measurement results.Furthermore, an experiment is performed in order to examine the application possibility of the presented spherical antenna. For this experiment, a spherical communication module with the proposed antenna and an inner wireless transmitter system is built. In this experiment, the spherical module is rolled down a slope while it continuously transmits pseudo-random numbers. The data are received by a receiver station at the top of the slope. The received data are evaluated in terms of the amount of received packets per unit of time. The numerical results indicate that the proposed antenna can be used for dynamic spherical systems such as throwable objects and spherical robots.

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