{'fraction_non_alphanumeric': 0.04104903078677309, 'fraction_numerical': 0.03876852907639681, 'mean_word_length': 4.1345029239766085, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Test results of a compact smooth-walled spline-profile horn at 30-38 GHz for radio astronomy application

A compact smooth-walled spline-profile horn covering the 30-38 GHz frequency band (8 mm radioastronomy band) has been optimized, manufactured and tested. A maximum aperture size was limited by the array application. The measured 3 dB-beamwidths are 40deg/37deg/38deg in the H/E/45deg-planes. The measured sidelobe level is less than -30 dB/-23 dB/-25 dB in H/E/45deg-planes and the maximum gain is 13.8 dBi. The measured cross-polarization level is less than -20 dB at the top of the band. The results of the trial observations at the RATAN-600 radio telescope with the horn are given. The antenna measurement and test results are in good agreement with simulation. We consider using such a horn as an efficient feed of a multi-beam receiving array for a radio telescope.