Directional Electromagnetic Couplers

Oliver, Bernard M.

doi:10.1109/jrproc.1954.274664

Cited by 193 publications

(38 citation statements)

References 5 publications

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“…Coupled transmission lines are described with the only one circuit model [12,13,16]. In this model introduced by Oliver [13] the coupling between line of unit inductance L and unit capacitance C is provided through admittance inverter with series negative capacitance C s and impedance inverter with parallel inductance L p . From the Oliver model the following impedances of the odd and even mode can be found [17]:…”

Section: Discussionmentioning

confidence: 99%

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Unified Description of Coupled Resonators and Coupled Transmission Lines

Abramowicz

2011

Acta Phys. Pol. A

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Coupled resonators and coupled transmission lines are described with the same coupling curve. A ratio between resonant frequencies, squared, of coupled resonators and ratio between impedances of coupled transmission lines reveal the same type of dependence on coupling coefficient. This can be used to select, adjust or create the models of coupled structures. As an example the new model of coupled transmission lines has been developed. Its application in LC element directional coupler is presented and discussed.

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Section: Discussionmentioning

confidence: 99%

“…The modes are named "odd" and "even" [12,13]. Each mode has its own characteristic impedance denoted Z 0o for odd mode and Z 0e for the even mode.…”

Section: Impedances Of Coupled Transmission Linesmentioning

confidence: 99%

Unified Description of Coupled Resonators and Coupled Transmission Lines

Abramowicz

2011

Acta Phys. Pol. A

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“…It is also planned to employ Two directional couplers [20]- [22] have been manufactured and used as ultrawideband field sensors [21] (Fig.18). The couplers have been placed in winding slot of the structure, as shown in Fig.15, for obtaining proper sensing levels.…”

Section: Final Remarksmentioning

confidence: 99%

Spectral Method for Localization of Multiple Partial Discharges in Dielectric Insulation of Hydro-Generator Coils: Simulation and Experimental Results

Oliveira

Modesto

Dmitriev

et al. 2016

J. Microw. Optoelectron. Electromagn. Appl.

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“…They are supported by 1/4-in. phenolic hangers at random intervals of about 35 m. After preamplification, the signals are lightly coupled to this transmission line by means of directional coupIers [Oliver, 1954]. The attachment points for the couplers were determined through SWR measurements with the east end of the feed line short-circuited.…”

Section: Array Feed Systemmentioning

confidence: 99%

A new wideband, fully steerable, decametric array at Clark Lake

Erickson

Fisher

1974

Radio Science

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A new, fully steerable, decametric array for radio astronomy is under construction at the Clark Lake Radio Observatory near Borrego Springs, California. This array will be a “T” of 720 conical spiral antennas (teepee‐shaped antennas, hence the array is called the TPT), 3.0 by 1.8 km capable of operating between 15 and 125 MHz. Both its operating frequency and beam position will be adjustable in less than one msec, and the TPT will provide a 49‐element picture around the central beam position for extended‐source observations. Considerable experience has been gained in the operation of completed portions of the array, and successful operation of the final array is assured. This paper describes the results of the tests which have been conducted with the conical spirals and outlines the planned electronics.

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Directional Electromagnetic Couplers

Cited by 193 publications

References 5 publications

Unified Description of Coupled Resonators and Coupled Transmission Lines

Unified Description of Coupled Resonators and Coupled Transmission Lines

Spectral Method for Localization of Multiple Partial Discharges in Dielectric Insulation of Hydro-Generator Coils: Simulation and Experimental Results

A new wideband, fully steerable, decametric array at Clark Lake

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