Circularly polarized conical beam microstrip patch antenna at S-band

Sharma, Tridip; Chakrabarti, Satyajit; Barman, Gourab

doi:10.1109/aemc.2015.7509234

Cited by 3 publications

(2 citation statements)

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“…In [10], arc-shaped patches and a disk-loaded feeding pin were utilized to realize omnidirectional conical-beam CP radiation, but the operating bandwidth was still very narrow. To that end, there have been many efforts and studies on wideband CP conical-beam antennas [11][12][13][14][15][16][17][18][19][20][21]. A wideband CP antenna consisting of a torus knot and a feeding probe with a conical-beam radiation pattern is proposed in [11].…”

Section: Introductionmentioning

confidence: 99%

“…A CP conical-beam antenna designed based on parasitic elements placed around the centrally fed monopole is presented in [15]. By using four microstrip line fed slot patches with truncated diagonal corners to realize CP, conical-beam radiation with the operating bandwidth of 12.2% was proposed in [16]. The antenna consists of a shorted monopolar patch proximity fed by a diskloaded coaxial cable and two sets of curved branches sequentially located along the radiating edges as described in [17].…”

Section: Introductionmentioning

confidence: 99%

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A Low‐Profile Circularly Polarized Conical‐Beam Antenna with Wide Overlap Bandwidth

Zhang

et al. 2021

Wireless Communications and Mobile Computing

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In this paper, a low-profile circularly polarized (CP) conical-beam antenna with a wide overlap bandwidth is presented. Such an antenna is constructed on the two sides of a square substrate. The antenna consists of a wideband monopolar patch antenna fed by a probe in the center and two sets of arc-hook-shaped branches. The monopolar patch antenna is loaded by a set of conductive shorting vias to achieve a wideband vertically polarized electric field. Two sets of arc-hook-shaped parasitic branches connected to the patch and ground plane can generate a horizontally polarized electric field. To further increase the bandwidth of the horizontally polarized electric field, two types of arc-hook-shaped branches with different sizes are used, which can generate another resonant frequency. When the parameters of the arc-hook-shaped branches are reasonably adjusted, a 90° phase difference can be generated between the vertically polarized electric field and the horizontally polarized electric field, so that the antenna can produce a wideband CP radiation pattern with a conical beam. The proposed antenna has a wide impedance bandwidth ( ∣ S 11 ∣ < − 10 dB ) of 35.6% (4.97-7.14 GHz) and a 3 dB axial ratio (AR) bandwidth at phi = 0 ° and theta = 35 ° of about 30.1% (4.97-6.73 GHz). Compared with the earlier reported conical-beam CP antennas, an important feature of the proposed antenna is that the AR bandwidth is completely included in the impedance bandwidth, that is, the overlap bandwidth of ∣ S 11 ∣ < − 10 dB and AR < 3 dB is 30.1%. Moreover, the stable omnidirectional conical-beam radiation patterns can be maintained within the whole operational bandwidth.

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