Bandwidth extension of planar antennas using embedded slits for reliable multiband RF communications Articles uri icon

publication date

  • July 2016

start page

  • 910

end page

  • 919

issue

  • 7

volume

  • 70

International Standard Serial Number (ISSN)

  • 1434-8411

Electronic International Standard Serial Number (EISSN)

  • 1618-0399

abstract

  • In this paper a technique is described to extend the impedance bandwidth of patch antennas without compromising their size. This is accomplished by embedding capacitive slits in the rectangular patch with a truncated ground-plane, and exciting the antenna through a meandered strip-line feed. The proposed antenna was fabricated on standard FR-4 substrate with permittivity of 4.6, thickness of 0.8 mm and loss-tangent of 0.001. The performance of the prototype antenna was verified through measurements. Characteristics of the antenna include an impedance bandwidth of 5.25 GHz (800 MHz-6.05 GHz) for VSWR <2 corresponding to a fractional bandwidth of 153.28%, peak gain of 5.35 dBi, radiation efficiency of 84.12% at 4.45 GHz, and low cross-polarization. These attributes make the antenna applicable for stable and reliable multiband applications in the UHF, L, S and major part of C-bands. The antenna offers advantages of low cost, low profile, ease of manufacturing, durability and conformability. © 2016 Elsevier GmbH. All rights reserved.

keywords

  • meandered strip-line feed multiband antenna planar slit antenna wideband antenna antenna feeders antenna grounds bandwidth microstrip antennas microwave antennas slot antennas strip telecommunication lines fractional bandwidths low cross polarization multiband antennas multiband applications planar slit radiation efficiency truncated ground plane wideband antenna electric impedance