Formulas for the computation of the far-field radiation patterns of rectangular microstrip antenna elements with thick substrates

✍ Scribed by Mehmet Kara

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 334 KB
• Volume: 14
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/(sici)1098-2760(19970420)14:6<360::aid-mop15>3.0.co;2-7

✦ Synopsis

Formulas based on the two-slot, the ca¨ity, and the surface current models to compute the far-field radiation patterns in both the E and H planes for rectangular microstrip antenna elements are studied and their ¨alidity assessed. Three closed-form formulas are presented for the calculation of the radiation patterns in the E plane for antenna elements with substrates thicker than those reported elsewhere. These are deri¨ed by modifying the two-slot model by the use of empirically deri¨ed correction factors, taking into account the power radiated in space and surface wa¨es, the surface-wa¨e model coefficients, and the line extension. The capability of the de¨eloped formulas is illustrated by comparison between the computed results and experimental measurements. The computed results are in good agreement with measurements. The H-plane patterns are computed from the two-slot model andror the ca¨ity models. The half-power beamwidth in the E and H planes ha¨e also been determined for each of the antenna elements in¨estigated in this work.