Research Article

Gain Improvement of Dual Band Antenna Based on Complementary Rectangular Split-Ring Resonator

Table 1


ParametersSimulated resultsMeasured results
Matching characteristics

First resonance ( 𝐹 1 )

𝐹 1 , (GHz)4.3524.19
Reflection coefficient, (dB)−16.75−21.25
Effective bandwidth at −5 dB (%)1.601.52

Second resonance ( 𝐹 2 )

𝐹 2 , (GHz)4.8924.808
Reflection coefficient, (dB)−15.15−13.86
Effective bandwidth at −5 dB (%)1.791.72

Radiation characteristics

First resonance ( 𝐹 1 )

Peak directivity, (dBi)7.167.36
Peak gain, (dB)−0.97−0.11
Radiation efficiency (%)15.3817.92

Second resonance ( 𝐹 2 )

Peak directivity, (dBi)7.2437.74
Peak gain, (dB)5.9465.85
Radiation efficiency, (%)74.1864.83