Research Article
Analysis and Design of Gap-Coupled Annular Ring Microstrip Antenna
Table 3
Peak value of input impedance,
resonance frequency for upper and lower band for different gap lengths.
| Feed point | c = 3.001 cm | c = 3.101 cm | c = 3.201 cm |
| Gap length
|
(ohms) |
(ohms) |
(GHz) |
(GHz) |
(ohms) |
(ohms) |
(GHz) |
(GHz) |
(ohms) |
(ohms) |
(GHz) |
(GHz) |
| S = 0.09 cm | 35.39 | 74.31 | 1.710 | 1.899 | 34.81 | 72.41 | 1.736 | 1.9337 | 33.61 | 65.33 | 1.770 | 1.9771 | S = 0.10 cm | 43.58 | 73.93 | 1.744 | 1.899 | 43.62 | 72.06 | 1.771 | 1.9338 | 42.35 | 64.16 | 1.806 | 1.9771 | S = 0.11 cm | 53.05 | 73.30 | 1.778 | 1.900 | 55.90 | 71.74 | 1.806 | 1.9343 | 53.20 | 65.49 | 1.842 | 1.9774 |
|
|