Broadband automated radar cross section measurements

Weir, William; Robinson, L. A.; Parker, Donald

doi:10.1109/tap.1974.1140900

Cited by 9 publications

(1 citation statement)

References 6 publications

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“…Network analyzer measurements are considered as CW measurements because the CW RCS values are obtained at discrete frequencies over the measurement bandwidth. An earlyapplication of network analyzers to RCS measurements is described in [41]. The received amplitude and phase values, with and without the target in the facility, are measured as afunction of frequencyfor different target orientations.…”

Section: Instrumentation Radarsmentioning

confidence: 99%

Radar cross section measurements

Dybdal

1987

Proc. IEEE

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The progress in radar cross section measurements is strongly related to the progress in radar technology. The recent acceleration in radar technology and processing techniques has generated a corresponding acceleration in interest for radar cross section measurements. Historically, early radar cross section measurements were performed to determine the detection range of radar systems, a fundamental objective that still exists. Later measurements, coupled with analytic techniques and computer codes, were performed to extend our understanding of the radar scattering process. At the present time, the availability of broad-band electronics, signal processing techniques, and digital technology results in radar cross section measurement programs which are directed toward exploring the performance of operational waveforms and processing, target discrimination, target detectability in clutter, and radar scattering control.The fundamentals of radar cross section measurements are reviewed. Measurement facilities, including the present research activities on compact range techniques, are then described. Instrumentation radars have benefited from both wide-bandwidth electronics and digital processing capabilities; Fourier transform techniques, in particular, provide both additional information on target scattering, and increase measurement accuracy by isolating the target from radar returns from the measurement facility. The frequency coverage has also extended to include millimeter-wave frequencies. Achievable accuracy is important in any measurement program, and those factors that limit the accuracy of radar cross section measurements are discussed.

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Section: Instrumentation Radarsmentioning

confidence: 99%

Radar cross section measurements

Dybdal

1987

Proc. IEEE

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Characterization of the scattering properties of an antenna by rapid swept-frequency measurements

Wang

1981 Antennas and Propagation Society International Symposium

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Rapid broadband swept-frequency automated scattering measurement

Papanicolopulos

Moore²,

Wang³

1981 Antennas and Propagation Society International Symposium

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Techniques for making rapid scattering cross-section measurements over wide frequency bands were recently developed with the advent of automated network analyzer and minicomputer. However, existing measurement systems reported in the literature, being limited by the horn antenna bandwidth, can sweep only an octave band [l]. In addition, not much has been emphasized in achieving highspeed real-time instantaneous display of the measure3 radar cross-section data.By using 2-18 GEIz quadridge horns and a 2-18 GHz Watkins-Johnson synthesized signal generator, the sweep bandwidth is increased to cover 2-18 GHz. However, these extremely wide banded horns have high reflection coefficients in the -15 to -25 dB range, which make it difficult to "see" the scattered return in a reflection utilized to achieve the 2-18 GHz bandwidth. However, the setup. As a result, a two-horn transmission setup must be new problem of mutual coupling between the transmit and receive horns must be resolved by,e.g., screen and absorber placed between them. Another difficulty in the wide bandwidth is the computer memory capacity, which can handle only about 80 frequency points. to reduce the time duration of the frequency scan to achieve instantaneous real-time display of RCS on the CRT. It has been demonstrated that RCS measurements at 80 discrete frequency points can be made in 24 sec, of which 16 sec was spent on the AlD interrogation. It appears that a faster and higher-resolution A/D unit and a computer with faster interface time characteristics should make it possible to reduce the measurement time to, say, 10 seconds. This rapid RCS measurement technique is a very powerful tool in the design and study of scattering related devices.Various software and hardware techniques were explored A technique, which is applicable to both one-horn reflection and two-horn transmission measurement systems, is to match the system at discrete but closely spaced frequencies.

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Broadband automated radar cross section measurements

Cited by 9 publications

References 6 publications

Radar cross section measurements

Radar cross section measurements

Characterization of the scattering properties of an antenna by rapid swept-frequency measurements

Rapid broadband swept-frequency automated scattering measurement

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