Multiband Monopole Antenna with Moderate Gain

Abstract

A multiband moderate gain monopole antenna with parasitic element has been presented in this paper. Two U-shape strips (radiating patch and parasitic element) are situated in face to face. The volume of the proposed antenna is taken about 50x40x1.6mm3. The length of the U-shaped radiating element and parasitic element together excite multiple modes, which produce multiple resonance frequencies. The resonance frequencies are 1.59GHz, 2.41GHz, 4.29GHz, 5.13GHz, and 7.41GHz. The corresponding -10dB bandwidths are 160MHz, 640MHz, and 5090MHz. The peak gains of the proposed antenna are obtained about 5dBi at 2.4GHz, 4.75dBi at 4.3GHz, 4.6dBi at 5.2GHz, and 7dBi at 7.2GHz. The evolution strategy of the proposed antenna structure is explained in the consecutive section. The measured results are experimentally tested and found good in agreement with simulated results.