{'fraction_non_alphanumeric': 0.034013605442176874, 'fraction_numerical': 0.028182701652089408, 'mean_word_length': 5.39751552795031, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 1, '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}}
A novel surface‐wave antenna design using a thin periodically loaded ground plane

This paper presents a novel surface‐wave antenna that realizes a low‐profile configuration using a thin patch‐loaded grounded slab, which has an in‐phase reflection coefficient for plane waves, but no band gap for surface waves. When a dipole antenna is horizontally positioned near this artificial ground plane, it works like a transducer that converts the energy from the feeding probe into surface waves in the ground plane. The propagation and diffraction of the surface waves generate a monopole‐type radiation pattern. The attractive antenna height, which is less than 10% of a typical monopole antenna, is desirable for wireless‐communication systems. The performance of the surface‐wave antenna is demonstrated through both the FDTD simulations and the measured results. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 47: 240–245, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21136