Textile linear polarization reconfigurable ring slot antenna for 5.8 GHz band

2017 ◽  
Author(s):  
Petr Vasina ◽  
Jaroslav Lacik
Keyword(s):  
Linear Polarization ◽  
Slot Antenna

Polarization Reconfigurable Dual-Band Rectangular Slot Antenna

Frequenz ◽  
2019 ◽  
Vol 73 (9-10) ◽  
pp. 339-351
Author(s):  
Rohit Kumar Saini
Keyword(s):  
Circular Polarization ◽  
Linear Polarization ◽  
Dual Band ◽  
Slot Antenna ◽  
Pin Diodes ◽  
Rectangular Slot ◽  
Left Hand ◽  
Right Hand ◽  
Lower Band ◽  
The Senses

Abstract A novel dual-band rectangular slot antenna is presented for dual-sense reconfigurable polarization. A W-shaped microstrip feedline and two rectangular parasitic patches are used to obtain dual-band circular polarization. Further, the feedline is modified so that the senses of polarization at the two bands are opposite. By introducing PIN-diodes in the feed lines, polarization can be switched among left-hand circular polarization (LHCP), right-hand circular polarization (RHCP), and linear polarization (LP). A prototype dual-band dual-sense antenna with f01 = 1.9 GHz and f02 = 3.45 GHz is fabricated in a 1.6 mm thick FR4 substrate. The measured circular polarized bandwidths are more than 7.6 % for the lower band and 5 % for the upper band.

Radiation characteristics of sharply directed conical waveguide-slot antenna arrays

2021 ◽  
Author(s):  
L.I. Ponomarev ◽  
A.A. Vasin ◽  
О.V. Terekhin ◽  
O.A. Volkov ◽  
L.S. Turko ◽  
...  
Keyword(s):  
Antenna Arrays ◽  
Linear Polarization ◽  
Practical Interest ◽  
Directional Pattern ◽  
Conical Surface ◽  
Slot Antenna ◽  
Waveguide Slot ◽  
Cone Axis ◽  
Electrodynamic Modeling ◽  
Waveguide Slot Antenna

Currently, much attention is paid to antenna arrays, the emitters of which can be located in the bow of unmanned aerial vehicles (UAVs). Emitters can be longitudinal, transverse or oblique slots located along the generatrix of the cone on the conducting surface. A number of specific requirements are imposed on such ARs used in on-board radar systems (radars) of UAVs, among which we can note the need to form a highly directional total-difference directional pattern (DP) with a maximum of the total DP and a minimum of a difference DP in the direction of the UAV flight axis, as well as high gain and slope of the difference characteristic. The aim of this work was to study the radiation of a waveguide-slot antenna array (WASAA) installed on a conical surface and providing linear polarization of the emitted field in the direction of the cone axis. For this, electrodynamic modeling of various configurations of WASAA, located both in free space and on a conical surface, was carried out. For the developed models of antennas, the directivity characteristics and their dependence on the geometry and dimensions of the WASAA are determined. The results of an experimental study of the characteristics of a model of a conical antenna emitting a field of linear polarization in the direction of the cone axis are presented. The experimental results are compared with the results of electrodynamic modeling. The results obtained are of practical interest for the development of airborne antenna UAVs.

Design and Analysis of Air Gap Microstrip Slot Antenna Using Aperture Coupling

2012 ◽  
Vol 2 (4) ◽  
pp. 104-106
Author(s):  
J. P. Ganji J. P. Ganji ◽  
◽  
M.C.Sahoo M.C.Sahoo ◽  
J.M.Rathod J.M.Rathod
Keyword(s):  
Air Gap ◽  
Slot Antenna ◽  
Aperture Coupling

BOLOMETRIC MEASURER OF LINEAR POLARIZATION OF LASER RADIATION

2013 ◽  
Vol 72 (15) ◽  
pp. 1423-1429
Author(s):  
S. V. Pogorelov ◽  
B. V. Safronov ◽  
V. P. Balkashin ◽  
I. A. Priz ◽  
I. V. Krasovskyy
Keyword(s):  
Laser Radiation ◽  
Linear Polarization

SOLUTION TO THE MODEL PROBLEM OF EXCITATION OF LOADED CONIC SLOT ANTENNA BY METHOD OF SINGULAR INTEGRAL EQUATIONS

2016 ◽  
Vol 75 (20) ◽  
pp. 1799-1812
Author(s):  
V. A. Doroshenko ◽  
S.N. Ievleva ◽  
N.P. Klimova ◽  
A. S. Nechiporenko ◽  
A. A. Strelnitsky
Keyword(s):  
Integral Equations ◽  
Singular Integral ◽  
Model Problem ◽  
Singular Integral Equations ◽  
Slot Antenna

SIW BASED DUAL FED CAVITY-BACKED SELF-DIPLEXING SLOT ANTENNA

2020 ◽  
Vol 79 (16) ◽  
pp. 1455-1466
Author(s):  
P. Nigam ◽  
A. Muduli ◽  
S. Sharma ◽  
A. Pal
Keyword(s):  
Slot Antenna
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