Modal cutoff conditions for a waveguide having an annular guiding region with a parabolically graded refractive-index profile

✍ Scribed by S. Ganguly; Kh. S. Singh; P. C. Pandey; S. P. Ojha

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 153 KB
• Volume: 22
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/(sici)1098-2760(19990805)22:3<167::aid-mop6>3.0.co;2-9

✦ Synopsis

Figure 3 Simulation comparisons for S11, gain, and axial ratios a dipole applied to a terrestrial vertical polarization system included in a patch where a hole has been created. The patch then covers an S frequency band. The printed structure in this case also has been optimized since the introduction of a slot and hole causes a shift in the axial ratio and matching that does not follow classical behavior; we then had to mechanize the behavior of the AR versus the matching and gain behavior. This was done through the introduction of slits on two of the edges of the patch. By adjusting the number of slits, their widths, lengths, and separations, centering the AR is possible.