A method to measure the aperture field and experimentally determine the near-field phase center of a horn antenna

Odendaal, J.W.; Pistorius, C.W.I.

doi:10.1109/19.206680

Cited by 8 publications

(1 citation statement)

References 14 publications

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“…Antenna phase measurement has very high requirements on the test environment and is very susceptible to interference, 27–29 thus it is difficult to obtain an accurate result. Therefore, a CATR (Raypact600B shown in Figure 9A with the proposed antenna as the feed is measured to prove indirectly that the antenna has a stable phase center and small wide‐angle phase variation.…”

Section: Measurement and Analysismentioning

confidence: 99%

Corrugated horn with stable phase center for Ka‐band compact antenna test range measurement systems

Cai

Zhou

Weng

et al. 2022

Int J RF Mic Comp-Aid Eng

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In this article, a corrugated horn feed antenna with a stable phase center is designed for the millimeter wave compact antenna test range (CATR). The calculation method of the phase center of a horn is analyzed in this article.The 45 -plane phase center is used as the combined phase center of the horn in order to perform the phase center calculation only once, thus faster, and to optimize the phase performance more conveniently. By adding an absorbing material surrounding the edge of the outer surface of the horn, the irregular currents on the outer surface of the horn are suppressed, thus achieving a more stable phase center. The absorbing material can also reduce the radar cross section of the antenna. The designed corrugated horn works in the 24-40 GHz wide band with the following performances: the deviation of the phase center in the working frequency band is less than ±0.25 mm, the phase variation within a ±30 beam width is less than ±2.5 . Moreover, the measured return loss is lower than À10 dB, the measured gain is 8-12 dBi, and the measured cross-polarization level is less than À30 dB. The beamwidth is about 56 -70 in the whole band, and the beamwidth difference between different planes is less than 5 . The achieved targets listed above makes the proposed corrugated horn suitable for very precise antenna measurements in CATR systems.

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Section: Measurement and Analysismentioning

confidence: 99%