The application of the method of moments to the analysis of electrically-small "compound" antennas

McLean, James

doi:10.1109/isemc.1995.523530

Cited by 6 publications

(7 citation statements)

References 12 publications

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“…This case corresponds to the combined antenna shown in Figure 1 Table 1. The results obtained by other researchers [6,7] are also given in this table for comparison. We can see from this table that the coupling between …”

Section: Mutual Impedance Between Electric and Magnetic Dipolesmentioning

confidence: 93%

“…Obtained in [6] Obtained in [7] Aligned Dipole Moments Figure 1(c), the loops are in the x-z plane and they are symmetric with respect to the origin and the x-axis. The smallest distance between the loops and the electric dipole is d 3 .…”

Section: Obtained In This Workmentioning

confidence: 98%

“…Another way of producing a high-gain antenna was introduced in the 1950s [6]. This technique used a partially reflecting surface …”

Section: Directivity Of An Antenna Embedded Inside a Fabry-perotmentioning

confidence: 99%

“…Investigations on the mutual interaction between an electrical dipole and a magnetic dipole (small loop) for different relative orientations of their dipole moments were presented in [6,7]. The authors of [7] adjusted the magnitudes of the currents of the dipoles with the purpose to obtain TE and TM modes of equal power.…”

Section: Introductionmentioning

confidence: 99%

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Combination of electric and magnetic dipoles with single-element feeding for broadband applications

Costa

Dmitriev

2005

Microw. Opt. Technol. Lett.

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are shown in Figures 4 and 5, respectively. The radiation patterns are similar to those of the conventional monopole antenna, although at the fourth band some nulls can be observed and these nulls are deeper for the antenna with ellipticity of 0.5 in the E-plane. In spite of this degradation, the radiation patterns at the fourth band are similar to those of the conventional monopole antenna. CONCLUSIONSeveral elliptical multiple-ring monopole antennas with different ellipticity ratios have been fabricated and measured. The results show that the widths of the resonance bands with regard to return loss can be controlled by the ellipticity ratio and wider bandwidth can be obtained by decreasing the ellipticity ratio. The radiation patterns were found to be similar to those of the conventional monopole antenna, although at higher frequencies some nulls did occur.ABSTRACT: This work presents four types of broadband compound antennas. The antennas are a combination of an electric dipole and small square or circular loops. The feeding of the electric dipole only is realized. The input impedance, reflection coefficient, and gain of the antennas with different geometries are analyzed numerically using the method of moments (MoM). It is shown that for the level of the reflection coefficient ͉⌫͉ Ͻ Ϫ10 dB, 80% to 90% bandwidth can theoretically be achieved for the proposed antennas. Figure 3 Input impedances of the compound antenna (case 1) and the single electric dipole

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Section: Mutual Impedance Between Electric and Magnetic Dipolesmentioning

confidence: 93%

Section: Obtained In This Workmentioning

confidence: 98%

“…Another way of producing a high-gain antenna was introduced in the 1950s [6]. This technique used a partially reflecting surface …”

Section: Directivity Of An Antenna Embedded Inside a Fabry-perotmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Combination of electric and magnetic dipoles with single-element feeding for broadband applications

Costa

Dmitriev

2005

Microw. Opt. Technol. Lett.

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“…A complete analysis (including moment method (MM) modeling) has been published elsewhere [14], [15]. An independent verification of the numerical results in [14] has been performed also [16]. A prototype array with matching networks has been built and is currently being tested [17], [18].…”

Section: Introductionmentioning

confidence: 99%

Electric lines of force of an electrically small dipole-loop antenna array

Overfelt

1998

IEEE Trans. Antennas Propagat.

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The electric lines of force of an electrically small dipole-loop antenna array have been determined analytically for both the near-and far-fields of the array. It has been found that the behavior of the families of electric contours are dependent upon a coupling parameter, which is the ratio of the loop and dipole sizes and currents. This parameter also controls the appearance (or not) and position of the points of equilibrium for the radiated field when analyzed in a real phase plane. The electric lines of force of the dipole-loop array exhibit increased directivity in the plane of the array when the coupling parameter is purely real, indicating that the respective dipole and loop currents must be in phase quadrature for this effect to occur.

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Coupling between elements of electrically small compound antennas

Tefiku

Grimes

1999

Microw. Opt. Technol. Lett.

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The application of the method of moments to the analysis of electrically-small "compound" antennas

Cited by 6 publications

References 12 publications

Combination of electric and magnetic dipoles with single-element feeding for broadband applications

Combination of electric and magnetic dipoles with single-element feeding for broadband applications

Electric lines of force of an electrically small dipole-loop antenna array

Coupling between elements of electrically small compound antennas

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