Abstract
In this paper, a novel compact microstrip patch antenna is proposed for Wi- Fi and WiMAX bands. To achieve miniaturization the dimensions of the square radiating patch are chosen with reference to the high frequency band (3.3 GHz). The dual band is achieved by loading a Complementary Split Ring Resonator (CSRR) into the radiating patch. The left handed nature of the CSRR is the cause for low frequency band (2.4 GHz). To improve the return loss bandwidth and axial ratio bandwidth at upper band the fractal concept is introduced along the edges of the square patch. Thus a low volume dual band antenna is simulated using HFSS. A comparison with measured data is also presented. The fabricated antenna is found to be occupying 25% less volume (with reference to 2.4 GHz) than existing antennas which is mainly due to the blending of the two recent concepts ‘metamaterials and fractals’.
Highlights
The modern wireless hand held gadget need to operate at multiple bands to be able to provide communication as well as GPS types of other services [1]
Instead of using multiple antennas for multiple operating frequencies, a single Microstrip Patch Antenna (MPA) which serves at all operating frequencies like WLAN, Wi-Fi and WiMAX applications with less size and wider bandwidth at each operating frequency is the most wanted candidate for today’s wireless hand held devices
In conventional dual band or multiband MPAs the dimensions of the radiating patch are taken with reference to lowest frequency band which requires more size, in the case of dual band antennas based on metamaterials the dimensions of the radiating patch are taken with reference to high frequency band which requires less size because of left handed nature
Summary
The modern wireless hand held gadget need to operate at multiple bands to be able to provide communication as well as GPS types of other services [1]. In conventional dual band or multiband MPAs the dimensions of the radiating patch are taken with reference to lowest frequency band which requires more size, in the case of dual band antennas based on metamaterials the dimensions of the radiating patch are taken with reference to high frequency band which requires less size because of left handed nature. The novelty of this antenna is to embed metamaterials and fractal curves into the conventional MPA to realize at Wi-Fi and WiMAX applications. The measurement with the fabricated antenna is compared with the simulated data
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