Analysis and Design of Gap-Coupled Annular Ring Microstrip Antenna

Table 1

Designing specification of annular ring microstripantenna.

Parameters	Value
Substrate material used	RT Duroid 5870
Effective relative permittivity	ε eff  =  2.1936
Relative permittivity of the substrate	ε r  =  2.32
Thickness of dielectric substrate	h  =  0.159 cm
Inner radius of the inner ring	a1  =  3 cm
Outer radius of the inner ring	b1  =  6 cm
Feed point of the inner ring	c  =  3.35 cm
Inner radius of outer ring	a2  =  6.05 cm.
Outer radius of outer ring	b2  =  9.05 cm.