Radiation Resistances of Loaded Antennas

Raymond, Richard C.; Webb, W.

doi:10.1063/1.1698365

Cited by 5 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For linearly polarized radiation, a hollow tube with a small disk forms a top loaded monopole [2] that is integrated around the feed of the spiral. By using a relatively thick tube with a small disk on top the height required of the antenna for proper operation is reduced to help maintain a low profile.…”

Section: Introductionmentioning

confidence: 99%

“…One such application is DBS radio in which geostationary satellites provide continuous coverage in the continental United States with terrestrial repeaters in areas where the blockage of the satellites' view is potentially disruptive. The suggested structure is a small, four-arm planar spiral [1] mounted above a ground plane integrated with a top loaded monopole [2].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spirapole antenna for communication systems utilizing both satellite and terrestrial assets

Colburn

Lynch

Obatoyinbo

et al. 2005

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

In this paper an antenna is presented that satisfies the two-fold radiation pattern requirement of communication systems utilizing both geostationary satellites and terrestrial transponders for coverage of mobile terminal away from the equator. A typical requirement for such a system is a low profile antenna that maximizes left-hand circularly polarized radiation in the satellite viewing angle, from 30 to 70 from zenith, and vertically polarized radiation in the terrestrial station viewing angle, from 70 to 90 from zenith. This dual radiation pattern coverage is achieved by integrating a small four arm spiral with a top loaded monopole into a single compact volume, an antenna termed a spirapole.Index Terms-Direct broadcast satellite, dual pattern antenna, spiral, top loaded monopole.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spirapole antenna for communication systems utilizing both satellite and terrestrial assets

Colburn

Lynch

Obatoyinbo

et al. 2005

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

show abstract

Appendix A: A World History of Electrically Small Antennas

Hansen¹,

Collin²

2011

Small Antenna Handbook

View full text Add to dashboard Cite

A practical technique for optimum matching of two‐element antenna arrays

Özdemir¹

2001

Micro & Optical Tech Letters

View full text Add to dashboard Cite

they are still low. And again, good agreement between the neural model predictions and the rigorous analysis with the SFE method is observed. CONCLUSIONSA new CAD tool for the design of microwave circuits, which combines segmentation, FEM, and ANNs, was presented. First, a fast and accurate neural model of an arbitrary microwave device is developed, starting from a set of training points computed using the SFE method. Afterwards, this neural model, whose evaluation is very fast, is used together with optimization algorithms for the microwave design.The first step in the neural model development is the division of the microwave device into small regions connected by waveguide segments. Then, the GSM of each region is modeled separately by MLPs. To achieve this, training points are needed, which are obtained in a very efficient way using the SFE method. The use of this analysis method allows us to deal with arbitrarily shaped 3-D regions connected by waveguide segments, also with arbitrarily shaped cross sections, and to easily include a very high number of modes in the connection ports into the computations. Finally, the complete GSM system is computed connecting all of the GSMs modeled in each region.By using segmentation techniques, the number of training points needed for a correct modeling is drastically reduced. Therefore, the development of a neural model is simplified considerably because, in the neural model development for microwave devices, the generation of the training set is usually the largest time-consuming step.This CAD tool is used for the design of a transition between coaxial and rectangular waveguides with good results. The neural model developed in this example shows very good agreement with the SFE method used to generate the training set, but it computes the response of the transition in a much shorter time. 2. J.M. Cid and J. Zapata, CAD of rectangular-waveguide H-plane circuits by segmentation, finite elements and artificial neural net-Ž . works, Electron Lett 37 2001 , 98᎐99. 3.

show abstract

Radiation Resistances of Loaded Antennas

Cited by 5 publications

References 5 publications

Spirapole antenna for communication systems utilizing both satellite and terrestrial assets

Spirapole antenna for communication systems utilizing both satellite and terrestrial assets

Appendix A: A World History of Electrically Small Antennas

A practical technique for optimum matching of two‐element antenna arrays

Contact Info

Product

Resources

About