Circularly polarized array antenna with conical beam radiation

2013 ◽  
Author(s):  
Chow-Yen-Desmond Sim ◽  
Bo-Yu Chen ◽  
Horng-Dean Chen ◽  
Tuan-Yung Han ◽  
Jeen-Sheen Row
Keyword(s):  
Array Antenna ◽  
Beam Radiation ◽  
Circularly Polarized ◽  
Conical Beam

scholarly journals A Low-Profile Circularly Polarized Conical-Beam Antenna with Wide Overlap Bandwidth

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Wei He ◽  
Yejun He ◽  
Long Zhang ◽  
Sai-Wai Wong ◽  
Wenting Li ◽  
...  
Keyword(s):  
Electric Field ◽  
Patch Antenna ◽  
Ground Plane ◽  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Beam Radiation ◽  
Circularly Polarized ◽  
Low Profile ◽  
Two Sides ◽  
Conical Beam

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.

A circularly polarized conical beam spherical slot array antenna

1999 ◽  
Vol 86 (7) ◽  
pp. 815-823 ◽  
Author(s):  
MONAI KRAIRIKSH ◽  
CHUWONG PHONGCHAROENPANICH ◽  
KOMSAK MEKSAMOOT ◽  
JUN-ICHI TAKADA
Keyword(s):  
Array Antenna ◽  
Circularly Polarized ◽  
Conical Beam

A slot-array antenna on a coaxial cylinder with a circularly polarized conical beam

2000 ◽  
Vol 83 (3) ◽  
pp. 74-87 ◽  
Author(s):  
Kyouichi Iigusa ◽  
Tasuku Teshirogi ◽  
Masaharu Fujita ◽  
Shin-ichi Yamamoto ◽  
Tetsushi Ikegami
Keyword(s):  
Coaxial Cylinder ◽  
Array Antenna ◽  
Circularly Polarized ◽  
Conical Beam
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