Abstract
In this paper, a design of highly effective dual-band microstrip antenna for X-band applications is developed. Dual-band response is obtained by etching four rectangular split ring resonator (RSRR) unit cells within the radiating element of a conventional patch initially designed to operate at 10 GHz. The proposed antenna is constructed on low lossy RT/duroid 5880 (ϵr = 2.2, tan δ = 0.0009) substrate of 20x20x1.575 mm3 total area. The antenna is tuned to operate at two resonant frequencies within 8 to 12 GHz depending on the geometric specifications of the RSRR's. A parametric study of different numbers of unit cells etched on the radiating element is investigated and discussed comprehensively through this study. Realized gain of about 6.2 and 6.8 dB at 8.8 and 10 GHz are attained. Consistent results are obtained between the measurements and simulation results using 3D full-wave FEM-base simulator.
Highlights
The rapid development of wireless communications generates a great interest in low cost, lightweight and mostly Omni-directional radiation pattern planar antennas
Microstrip antennas can be utilized for different applications such as mobile communication systems, synthetic aperture radar (SAR), global positioning systems (GPS), microwave sensors, biomedical telemetry services, WLAN, missiles, etc. [1,2,3]
Planar metamaterials are used intensively to scale down the antenna size by using two different metamaterial unit cells to create three resonances by the same antenna, which accomplishes a reduction in the antenna size
Summary
The rapid development of wireless communications generates a great interest in low cost, lightweight and mostly Omni-directional radiation pattern planar antennas. Conventional microstrip antennas suffer from some limitations such as narrow bandwidth, low gain, and poor efficiency These limitations have been overcome by modifying these antennas in several ways. The improvement of metamaterial (MTM) technology provides a new choice for the multi-band antenna designs As it is known, the split ring resonators (SRRs) and complementary split ring resonators (CSRRs) are the most used basic metamaterial unit-cells. The split ring resonators (SRRs) and complementary split ring resonators (CSRRs) are the most used basic metamaterial unit-cells By etching these unitcells on the radiating element or loading them on the ground plane, multi-band characteristics can be realized [7,8].
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