Leaky Coaxial Cable With Circular Polarization Property

A wideband strip-helical antenna with 1.1 turns is analyzed numerically and experimentally. By replacing the traditional wire helix with wide metallic strip, the forward traveling current on the strip helix with about one turn smoothly decays to the minimum value at the open end of the helix. Therefore, the strip helix can excite a wideband circular polarization (CP) wave with 50-ohm impedance matching. The proposed antenna is printed on a hollow-cylinder with a substrate relative permittivity ofεr=2.2and a thickness ofh=0.5 mm. A 50 Ω coaxial cable is directly connected to excite the strip-helical antenna without any additional impedance matching section. The ground plane is placed below the antenna in order to provide a directional radiation pattern. To demonstrate this method, a prototype of 1.1-turn strip-helical antenna is tested. The test shows that the proposed antenna can reach an overlapped bandwidth of 46% with height of 0.52λ0, whereλ0is the wavelength in free space at the center operation frequency.

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A Compact Circular Polarized Antenna for Deep Space Applications

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.a1016.1291s52019 ◽

2019 ◽

Vol 9 (1S5) ◽

pp. 58-61

Keyword(s):

Circular Polarization ◽

Dielectric Material ◽

Low Cost ◽

Axial Ratio ◽

Coaxial Cable ◽

Operating Frequency ◽

Impedance Bandwidth ◽

Deep Space ◽

Space Applications ◽

Rectangular Patch

A compact Circular polarized rectangular patch antenna has been designed for the Deep Space applications in the Ku band with an operating frequency of 13.15GHz. The patch has been truncated at the diagonal corners and two L shaped slots are been etched in the patch to get the circular polarization. A 50Ω coaxial cable has been used to excite the antenna. The overall dimension of the antenna is 13mm×13mm×0.508mm which is 0.65λ×0.65λ making the proposed antenna a compact one. The Proposed antenna is having an impedance bandwidth of 25GHz ranging from 13GHz to 13.25GHz with a gain of 7.82dB at the operating frequency of 13.15GHz. The axial ratio of the antenna at the operating frequency is 2.94dB which indicate the circular polarization. Low cost FR4 material is been used as the laminate base for the antenna which will act as the dielectric material.

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Design of Parabola-Shaped Planar Lossy Magnetic Surface for Improved Isolation Characteristic Between GPS Array Elements With Circular Polarization Property

IEEE Antennas and Wireless Propagation Letters ◽

10.1109/lawp.2019.2955981 ◽

2020 ◽

Vol 19 (1) ◽

pp. 139-142

Author(s):

Jun Hur ◽

Gangil Byun ◽

Hosung Choo

Keyword(s):

Circular Polarization ◽

Magnetic Surface ◽

Polarization Property

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A New Kind of Circular Polarization Leaky-Wave Antenna Based on Substrate Integrated Waveguide

International Journal of Antennas and Propagation ◽

10.1155/2015/397960 ◽

2015 ◽

Vol 2015 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Chong Zhang ◽

Junhong Wang ◽

Meie Chen ◽

Zhan Zhang ◽

Zheng Li

Keyword(s):

Circular Polarization ◽

Radiation Pattern ◽

Structural Parameters ◽

Axial Ratio ◽

Polarization Property ◽

Substrate Integrated Waveguide ◽

Leaky Wave ◽

Leaky Wave Antenna ◽

Wave Antenna

A new kind of circular polarization leaky-wave antenna with N-shaped slots cut in the upper side of substrate integrated waveguide (SIW) is investigated and presented. The radiation pattern and polarization axial ratio of the leaky-wave antenna are studied. The results show that the width of N-shaped slots has significant effect on the circular polarization property of the antenna. By properly choosing structural parameters, the SIW based leaky-wave antenna can realize circular polarization with excellent axial ratio in 8 GHz satellite band.

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