Simple expressions for the directivity of a circular microstrip antenna

Verma, Kajal; Nasimuddin, Nasimuddin

doi:10.1109/map.2002.1077780

Cited by 8 publications

(4 citation statements)

References 7 publications

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“…Existen varios métodos y configuraciones que se utilizan para medir la ganancia, y que dependen de la frecuencia de operación [16][17].…”

Section: Resultsunclassified

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Antena de parche semicircular con elemento parásito para CanSat

Torres¹,

Monroy²,

Téllez³

2019

RCS

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Resumen. En este trabajo se presenta el diseño de una antena de parche de estructura geométrica semicircular y con un elemento parásito, para su utilización en la radiocomunicación de satélites educativos de la categoría lata (CanSat). La antena desarrollada presentó un peso mínimo de 13.2 gramos, realizada físicamente en un material que cubre los requerimientos de tipo electromagnético, impresa en un substrato FR-4, con dimensiones máximas de 54 mm de diámetro, a una frecuencia resonante de 2.4 GHz. La antena tiene un peso, aproximadamente del 2% del peso total del nano satélite (0.355 Kg). Las pérdidas por retorno S11 logradas son menores a-10 dB. Los resultandos obtenidos, como la ganancia, patrón de radiación, ancho de banda, y principalmente sus dimensiones y peso, exhiben a la antena propuesta como una gran opción para ser empleada en nanosatélites.

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“…Existen varios métodos y configuraciones que se utilizan para medir la ganancia, y que dependen de la frecuencia de operación [16][17].…”

Section: Resultsunclassified

“…A frecuencias superiores a 1 GHz, usualmente se utiliza el espacio libre para medir la ganancia, puesto que a frecuencias menores es difícil simular las condiciones de espacio libre debido a las longitudes de onda grandes, razón por la cual se mide bajo condiciones con reflexión a tierra [16].…”

Section: Resultsunclassified

Antena de parche semicircular con elemento parásito para CanSat

Torres¹,

Monroy²,

Téllez³

2019

RCS

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“…The following relation is used for an equivalence relation between a rectangular patch ( resonating length = l, width = w) and a circular patch (radius = a) resonating at the same frequency; a = l/2 and w = a(π-2). The effective radius of circular microstrip patch can be calculated by effective radius a eff can be evaluated from [8]. …”

Section: Design Of Circular Microstrip Patchmentioning

confidence: 99%

Design of Circular Microstrip Patch with Spaced Dielectric Superstrates

Kumar

Malathi

Shinde

2007

2007 International Symposium on Signals, Systems and Electronics

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This paper presents the simple design expressions for circular microstrip patch with spaced dielectric and covered dielectric loaded with ice. The resonant frequency of circular microstrip antenna with cover dielectric decreases as h 2 /h increases. The % change in f r w. r. to Circular Microstrip Patch is 1.96% and 9.52 % respectively for ε r2 = 2.32 & ε r3 = 10.2 for ε r1 = 2.94 & h2/h=9.52. The effect of loaded ice on covered Circular Microstrip Patch further lower down the resonant frequency. Its effect is more on f r for small h 2 /h ratio. The intention or unintentional air-gap brings down the f r of circular microstrip patch. Spaced dielectric effect on f r is more for small air-gap. The % change in f r for spaced dielectric superstrate is 1.58% and 3.05 % for ε r3 = 3.5 and 10.2 at h 2 /h = 1.5 w. r. to circular microstrip patch f r 2.678 GHz . This expression is suitable for CAD on desk.

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“…For the important special case of real , the lattice is parallel to the real axis. For any nonzero , the corresponding residues involve powers of (25) In the special case , the lattice continues indefinitely to the left (to the right), and the powers of ascend (descend).…”

Section: Simple Applications Of Mellin Transforms and The Gamma Fumentioning

confidence: 99%

Integral Evaluation Using the Mellin Transform and Generalized Hypergeometric Functions: Tutorial and Applications to Antenna Problems

Fikioris

2006

IEEE Trans. Antennas Propagat.

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This is a tutorial presentation of the Mellin-transform (MT) method for the exact calculation of one-dimensional definite integrals, and an illustration of the application of this method to antenna/electromagnetics problems. Once the basics have been mastered, one quickly realizes that the MT-method is extremely powerful, often yielding closed-form expressions very difficult to come up with other methods or to deduce from the usual tables of integrals. Yet, as opposed to other methods, the MT-method is very straightforward to apply; it usually requires laborious calculations, but little ingenuity. In fact, the MT-method is used by Mathematica to symbolically calculate definite integrals. The first part of this paper is a step-by-step tutorial, proceeding from first principles. It includes basic information on Mellin-Barnes integrals and generalized hypergeometric functions, and summarizes the key ideas of the MT-method. In the remaining parts, the MT-method is applied to three examples from the antenna area. The results here are believed to be new, at least in the antenna/electromagnetics literature. In our first example, we obtain a closed-form expression, as a generalized hypergeometric function, for the power radiated by a constant-current circular-loop antenna; this quantity has been extensively discussed recently. Our second example concerns the admittance of a 2-D slot antenna. In both these examples, the exact closed-form expressions are applied to improve upon existing formulas in standard antenna textbooks. In our third example, finally, we obtain a very simple expression for an integral arising in recent, unpublished studies of unbounded, biaxially anisotropic media.

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Simple expressions for the directivity of a circular microstrip antenna

Cited by 8 publications

References 7 publications

Antena de parche semicircular con elemento parásito para CanSat

Antena de parche semicircular con elemento parásito para CanSat

Design of Circular Microstrip Patch with Spaced Dielectric Superstrates

Integral Evaluation Using the Mellin Transform and Generalized Hypergeometric Functions: Tutorial and Applications to Antenna Problems

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