SR-Based Printed Antenna Array with Reduced Size

Array of antenna with reduced size is required for wireless and mobile communications due to the portability properties. This paper presents a printed antenna array based on spiral resonator (SR) with reduced size. The proposed antenna array is configured by use of 2×2 patches of SR structure on two layers of FR4 epoxy dielectric substrate with each thickness of 1.6 mm. The characterization result of proposed printed antenna array provides the reflection coefficient (S
₁₁
) value of -23 dB at the frequency of 2.4 GHz with the working bandwidth of 95 MHz for the S
₁₁
value less than -10 dB. Meanwhile, the gain of proposed printed antenna array achieves around 7 dB. The simulation result is verified with the measurement one which shows a good agreement. Moreover, the size of proposed SR-based 2×2 printed antenna array is reduced up to 27% compared to the one of 2×2 printed square patches antenna array.