Circularly polarized H-shaped microstrip-array antenna with a T-slot for DSRC system roadside equipment

✍ Scribed by By Sun-Ho Choi; Hwa-Choon Lee; Kyung-Sup Kwak

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 283 KB
• Volume: 51
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.24369

✦ Synopsis

Abstract

This article describes the design of a novel circularly polarized H‐shaped microstrip‐array antenna with a T‐slot for dedicated short‐range communication (DSRC) system roadside equipment (RSE: 5.850–5.925 GHz). The antenna system needs a correct radiation pattern, at the assigned communication area, without interference from the other radio wave propagation. The proposed antenna is designed to reduce the side lobe level (SLL) by using the proper distance for patch array and multilayer substrates for DSRC RSE. H‐shaped patches are used for circular polarization (RHCP or LHCP) with a T‐slot. The measured bandwidth of the fabricated antenna is from 5.830 to 5.939 GHz when the return loss < −10 dB. The measured axial ratio (RHCP) is 1.25–2.02 dB and gain is 15.62–15.94 dBi. The experimental 3‐dB beam width (HPBW) in the E‐plane and H‐plane are 22.52° and 24.11° at 5.91 GHz, respectively. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1545–1548, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24369