An analysis of the performance of multi-aerial Adcock direction-finding systems

Redgment, P.G.; Struszynski, W.; Phillips, G. J.

doi:10.1049/ji-3a-2.1947.0095

Cited by 7 publications

(2 citation statements)

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“…The object of going to (say) eight elements is to obtain greater sensitivity for an acceptable level of spacing error. The Peile-Lampe direction finder used in the Second World War was of the eight-element type with capacitive goniometer, 13 and sixelement Adcocks were used extensively by the German Air Force. Ziehm 37 gave a Fourier expansion of the errors of six-element systems.…”

Section: Other Forms Of Adcockmentioning

confidence: 99%

High-frequency direction finding

Gething

1966

Proc. Inst. Electr. Eng. UK

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SynopsisThe principles underlying high-frequency direction finding are summarised and relevant literature is reviewed. Various forms of direction finder are briefly described. The principal sources of error, including propagation effects, and the statistical problem of combining bearings into a fix are discussed. It is generally accepted that improved accuracy is most likely to be obtained with wide-aperture systems, combined with greater use of information about the ionosphere and the propagation modes involved: this view is supported by the literature reviewed.

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Section: Other Forms Of Adcockmentioning

confidence: 99%

High-frequency direction finding

Gething

1966

Proc. Inst. Electr. Eng. UK

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“…Breuninger [1941,1942] presented the first of many suggestions to achieve wider apertures. The summary of Redgment et al, [1947] showed the 2 ø aperture could be extended to a least .43x and probably lx by various means including Breuninger's or Wagstaf/e's [1937] design incorporating a polyphase goniometer or multiple azimuthally-offset conventional goniometers, and Rocke's suggestion [Wright et al, 1945] to split each antenna into two azimuthally separated antennas. Another approach is to instrument two identical four-element Adcocks, offset 45 ø in azimuth so as to produce the difference of their individual spacing errors.…”

Section: Introductionmentioning

confidence: 99%

Wider Aperture Sine‐Cosine Direction Finders

Travers¹,

Green²

1972

Radio Science

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Higher‐order sine‐cosine azimuth patterns for Adcock direction finding are investigated to determine spacing errors, reradiation errors, and pickup factor. The higher modes achieve wider apertures and reduced wave interference error; they exhibit comparable pickup factors but require an increase in the minimum number of antennas and different sensing methods. The 1.220λ spacing limit is appropriate only to the dipole mode, the corresponding limit for the quadrupole mode being 1.684λ and correspondingly greater for the higher modes. Reduced spacing error for the minimum number of antennas occurs at increasingly wider apertures which also tend to more closely approach the theoretical limits with increasing mode. The higher modes exhibit reduced response in the vicinity of the zenith. The resolution of the additional bearing ambiguities involves the use of one or more lower‐order patterns. Predicted sense performance as a function of reradiated field amplitude is computed for a combination of quadrupole and dipole modes.

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Naval radio direction-finding

Crampton¹

1947

Journal of the Institution of Electrical Engineers - Part I: General

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An analysis of the performance of multi-aerial Adcock direction-finding systems

Cited by 7 publications

References 0 publications

High-frequency direction finding

High-frequency direction finding

Wider Aperture Sine‐Cosine Direction Finders

Naval radio direction-finding

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