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



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.



 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.



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.



 The antenna is compact in size and suitable for radar, satellite and vehicular
communication.
