Radiation performance of Circularly Polarized Broadband Gap Coupled Elliptical Patch Antenna

Abstract

In this communication design and performance of a novel single-layer assembly of gap coupled elements in elliptical shape is proposed to achieve broadband performance with circular polarization. Out of five patches considered in this assembly, two pairs of patches having different patch areas are arranged close to an edge truncated elliptical patch. The central edge truncated elliptical patch is fed through inset feed arrangement and the other patches are parasitically gap coupled to the central patch. With such an arrangement, an improved impedance bandwidth of 1.58 GHz or 18.5% with respect to central frequency 8.5 GHz is achieved. Three resonant modes are excited with this arrangement giving improved bandwidth and gain in comparison to a conventional elliptical patch antenna with same semi-major and semi-minor axes. In the entire bandwidth, the simulated radiation patterns of proposed arrangement of patches are more or less identical in shape.

Dual Band Circular Polarized Printed Dipole Antenna for S and C Band Wireless Applications

“…A glass epoxy FR4 substrate is used for the design of antenna having parameters value ε r = 4.4, tan δ = 0.025. The overall volume of this antenna is 64 × 32 × 1.59 mm 3 . In this design, the left side portion of the dipole antenna is printed on the upper surface of the substrate (act as a patch) whereas the right side portion of the dipole is printed on the lower surface (acts as a ground).…”

“…A summary of efforts and focus devoted to this issue by scientists and researchers in current time is as follows. In [3], an assembly of elliptical shape gap coupled patches is presented by Sharma et al to achieve the CP with wide bandwidth and suitable radiation performance; however, in this arrangement the size on the antenna is an issue, which limits its use. In [4], a dualband stacked single-feed CP antenna is presented by Kumar et al, which gives ARBWs 1.3% and 1.1% for upper and lower bands respectively with a very small frequency ratio of 1.03.…”

“…The orientation and dimension of slots are optimized to achieve CP radiations. The offered antenna resonates at low-frequency 0.91 GHz at a cost of large volume size which is 80 × 80 × 4.572 mm 3 . This size of the antenna can be reduced by applying size reduction techniques which include meandering in the ground plane and/or in the patch.…”

Radiation Characteristics of Dual Print Microstrip Patch Antenna using IE3D and CST Electromagnetic Simulation Software

“…There are multiple ways by which one can enhance the IBW and gain includes the use of low permittivity substrate [13], by increasing the height (thickness) of substrate material [14], by embedding the proper slot at appropriate location in patch as well as in ground termed as Defected Ground Structures (DGS) [15][16], using PBG or EBG [17], the introduction of parasitic patch in the same plane with the main radiating patch along the radiating or non-radiating edge and in a different plane [18][19], superstrate [20] etc.…”

Wideband Gap Coupled Assembly of Rectangular Microstrip Patches for Wi-Max Applications

“…The bandwidth and gain of antenna may be significantly improved by applying low permittivity substrate materials having low loss tangent, like foam material or by introducing an air gap between the patch radiator and the ground plane [6]. Several such antennas utilizing thick air substrates have been reported in the recent past to achieve impedance bandwidth exceeding 10% for broadband operation [7][8][9][10][11][12][13]. For enhancement of bandwidth several techniques have been proposed which includes use of parasitic patch, use of larger slot on patch antennas and defected ground structures.…”