A metamaterial extended microstrip rectangular patch antenna with CSRR loading and defected ground structures(DGS) is proposed for wideband applications with band notching at the frequencies of KU band. The proposed antenna is designed by embedding it on Rogers RT/Duroid 5880 substrate with good impedance matching of 50 Ω at the feedline. The high frequency structure simulator (HFSS) is used to design and simulate the antennas parameters in the operating band. Measurement results confirm the antenna characteristics as predicted in the simulation with a slight shift in frequencies.

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A two element 2X2 linear array Yagi antenna which is meant to operate at frequency of 3.5GHz which can be used for low band 5G as well as for WIMAX is presented in this paper. This array consists of two radiating elements of eight parasitic elements each with overall dimensions of 110×60×1.6mm3. The proposed antenna was built on Rogers Duroid substrate. It exhibits a good bandwidth (impedance bandwidth of single antenna element about 600Mhz.for S11 less than-10dB at the center frequency of 3.5 GHz) and gain of 10.5dB. The idea behind this paper is to attain good gain along with bandwidth which can be utilized for vehicular applications.

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