Dual Band and Beam-Steering Antennas Using Reconfigurable Feed on Sierpinski Structure

International Journal of Antennas and Propagation ◽

10.1155/2015/492710 ◽

2015 ◽

Vol 2015 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Seonghun Kang ◽

Chang Won Jung

Keyword(s):

Beam Steering ◽

Scale Factor ◽

Dual Band ◽

Reflection Coefficients ◽

Patch Antennas ◽

Radiation Patterns ◽

Self Similarity ◽

5 Ghz ◽

Microwave Substrate ◽

Dual Bands

Fractal patch antennas based on the Sierpinski structure are studied in this paper. The antennas operate at dual bands (around 2 and 5 GHz) and are designed to steer the beam directions at around 5 GHz band (the first harmonic). The antennas use reconfigurable triple feeds on the same antenna plane to have three beam directions. The same scale factor defines the geometrical self-similarity of the Sierpinski fractal. The proposed antennas are fabricated through three iterations from 1st order to 3rd order and utilize FR-4 (εr= 4.4) for the microwave substrate. The performances of the antennas, such as reflection coefficients and radiation patterns are verified by simulation and measurement. The results show that the properties of the proposed antennas in three orders are similar.

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A Novel Pentagonal Shaped Planar Inverted-F Antenna for Defense Applications

Recent Patents on Computer Science ◽

10.2174/2213275911666181102151149 ◽

2019 ◽

Vol 12 (2) ◽

pp. 95-100

Author(s):

Purnima Sharma ◽

Akshi Kotecha ◽

Rama Choudhary ◽

Partha Pratim Bhattacharya

Keyword(s):

Mobile Communication ◽

Satellite Communication ◽

Dual Band ◽

Vehicular Communication ◽

Radio Frequency Field ◽

Wireless Applications ◽

High Frequency Structure Simulator ◽

Low Profile ◽

Radar Satellite ◽

5 Ghz

Background: The Planar Inverted-F Antenna (PIFA) is most widely used for wireless communication applications due to its unique properties as low Specific Absorption Rate, low profile geometry and easy fabrication. In literature a number of multiband PIFA designs are available that support various wireless applications in mobile communication, satellite communication and radio frequency field. Methods: In this paper, a miniature sized planar inverted-F antenna has been proposed for dual-band operation. The antenna consists of an asymmetrical pentagonal shaped patch over an FR4 substrate. The overall antenna dimension is 10 × 10 × 3 mm3 and resonates at 5.7 GHz frequency. A modification is done in the patch structure by introducing an asymmetrical pentagon slot. Results: The proposed pentagonal antenna resonates at 5.7 GHz frequency. Further, modified antenna resonates at two bands. The lower band resonates at 5 GHz and having a bandwidth of 1.5 GHz. This band corresponds to C-band, which is suitable for satellite communication. The upper band is at 7.9 GHz with a bandwidth of 500 MHz. Performance parameters such as return loss, VSWR, input impedance and radiation pattern are obtained and analysed using ANSYS High- Frequency Structure Simulator. The radiation patterns obtained are directional, which are suitable for mobile communication. Conclusion: The antenna is compact in size and suitable for radar, satellite and vehicular communication.

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