Broadband gap‐coupled assembly of patches forming elliptical patch antenna

Abstract

The radiation performance of a compact gap‐coupled assembly of patches forming the geometry of elliptical patch antenna is simulated and tested using glass epoxy FR4 substrate material. This assembly is achieved by cutting a conventional elliptical patch antenna geometry into three independent patches through two narrow slits parallel to minor axis of elliptical patch. The two outer patches are identical in shape and size, and the central patch is excited through inset probe feed. Two outer patches are gap coupled to the center patch. This arrangement of antenna elements resonate at three frequencies 3.41, 3.62, and 5.54 GHz, respectively. The first two frequencies are closely spaced and gives an improved bandwidth (>10%). The radiation patterns of antenna at all three frequencies are almost identical in shape and nature. Details of the antenna design approach and experimental results are presented and discussed systematically. Measurements are in excellent agreement with simulation results which make the proposed structure promising for Wi‐Max applications. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:340–344, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25693

A Novel Design of Parasitically Gap Coupled Patches Forming an Elliptical Patch Antenna for Broadband Performance

“…In this review challenges with gap coupled microstrip antennas and types of gap coupled microstrip antennas as well as numerical methods of calculating various parameters of the gap coupled microstrip antennas are discussed. The coplanar arrangement with one or more parasitic patches to attain broadband operation has also been reported in several papers in the literature [13][14][15][16]. Under these arrangements, tight coupling requires small gaps between elements, which can cause fabrication and operational problems, but larger bandwidths up to 25% can be achieved.…”

Multi-Resonator Variations of Circular Microstrip Antenna With Narrow Annular Sectoral Patches for Wideband Response

“…This represents the equivalence of stub loaded annular sectoral patch with the equivalent rectangular patch. Further, the resonance frequency for TM 02 mode of the annular sector pair is calculated using Equations ( 13)- (15). With reference to the stub loaded configuration at 1200 MHz discussed above, the proximity feeding strip dimension ('l s ') and length of the stub ('L st ') are expressed in terms of the wavelength 'λ g ' of the TM 11 mode.…”

“…On the other hand, gap-coupled configurations are simpler and also result in increased gain due to larger aperture size. Additional patches can be incorporated on the same plane as that of the fed patch (planar multi resonator configurations) [13][14][15][16][17][18][19][20][21][22][23], or they can be placed above the fed patch (stacked configurations) [24][25][26][27][28][29]. In comparison with the planar configurations, stacked configurations result in an increased cross polarization radiation due to the volume enhancement in terms of total substrate thickness.…”

Radiation performance of Circularly Polarized Broadband Gap Coupled Elliptical Patch Antenna

“…Other technique involves multilayer structures with parasitic patches like E, V and H shapes, which excites multiple resonant modes [8]. Several papers [9][10][11][12][13] have reported the coplanar arrangement with one or more parasitic patches to attain broadband operation. Under this arrangement tight coupling requires small gaps between elements, which can cause fabrication and operational problems, but larger bandwidths up to 25% can be achieved.…”