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Ultra-wide band response in planar monopole microstrip antenna is realized due to coupling between fundamental and higher order patch modes. In the reported literature, formulation in resonant length at fundamental and higher order modes of planar monopole patch is not given. In this paper, by studying the surface current distributions for planar monopole rectangular microstrip antenna, a formulation...
Broadband reflectarray microstrip antenna with an array and feed element consisting of E-shaped patches is proposed. The reflect array configurations namely, 1 × 3, 3 × 1, plus-shaped and 3 × 3 arrays have been studied. A parametric study for varying distances between the fed E-shaped patch and array of E-shaped patches for varying slot dimensions is presented. The maximum gain of more than 12 dBi...
Broadband U-slot cut rectangular microstrip reflectarray antenna with a U-slot cut rectangular microstrip antenna as a feed is proposed. The 1 × 3, 3 × 1, plus-shaped and 3 × 3 patch arrays have been studied. A parametric study for varying distances between fed patch and the array and for varying U-slot dimensions in reflect array patches is presented. An optimum gain of nearly 11 dBi with bandwidth...
Analysis of proximity fed circularly polarized square patch antenna with multiple triangular notches is presented. The triangular notch tunes the spacing between TM10 and TM01 modes to yield circular polarization. Further a design of single triangular notch cut square patch antenna is also proposed which gives similar axial ratio bandwidth. The resonant length formulation at modified TM01 and TM10...
Analysis of ultra-wideband antenna for Sectoral shaped microstrip patch for angle increasing from 90° to 330°, for realized bandwidth and gain is presented. To optimize the individual patches, center or offset feed microstrip line is used. A bandwidth of around 15 GHz is obtained, in Sectoral patches with angle increasing from 90° to 180°, whereas for Sectoral patches with angles increasing from 210°...
Microstrip reflectarray antenna consisting of rectangular microstrip antenna as the feed and an array consisting of edge shorted rectangular patches, is proposed. Four reflect array configurations namely, 1 × 3, 3 × 1, plus-shaped and 3 × 3 arrays have been studied. A parametric study for varying distances between the fed patch and array of patches is presented. An optimum gain of around 8.8 dBi with...
Modified rectangular shape ultra wide band microstrip antenna with microstrip line feed is proposed. The effects of tapering structure on the realized bandwidth are discussed. The tapered end configuration yields bandwidth of 15.4 GHz with a peak gain of 2 dBi. Further, the effect of replacing the tapered end structure with an elliptical base structure is investigated. The elliptical base antenna...
Rectangular slot cut compact shorted 90° Sectoral Microstrip Antenna is proposed. An analysis to investigate the effect of rectangular slot which yields broader bandwidth is presented. The slot does not introduce any new mode but it reduces the resonance frequency of second order TM1/4,1 mode of the shorted patch. Due to its coupling with fundamental shorted TM1/4,0 mode, yields bandwidth of more...
The notch cut circular microstrip antenna to realize circular polarization on thinner substrate is proposed. The notch degenerates fundamental TM11 mode into two orthogonal modes, to yield circular polarization. To improve upon the gain and bandwidth, its three layer suspended configuration is proposed. It yields VSWR and axial ratio BW of 60 and 15 MHz, respectively with gain of more than 5 dBi over...
A circularly polarized microstrip reflectarray antenna with a microstrip antenna feed and patches having variable rotation angles is proposed. A parametric study for three different configurations, namely a single patch, 1 × 3 and 3 × 1 array is presented. The plus-shaped and 3 × 3 array configurations have also been studied. It is observed that an optimum axial ratio bandwidth of around 45 MHz is...
Microstrip line fed elliptical shaped ultra wide band antenna with and without elliptical slot is presented. The elliptical patch yields bandwidth of 12.6 GHz with a peak gain of 3.0 dBi. Further, a parametric study for the elliptical slot cut inside the elliptical patch is presented. The elliptical slot optimizes the resonance frequencies of fundamental and higher order modes and impedance at them...
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