scholarly journals Wideband antenna with circular polarization for GLONASS system

2021 ◽  
pp. 4-13 ◽  
Author(s):  
A. S. Antonov ◽  
V. V. Balenkov ◽  
E. L. Kapylov
Keyword(s):  
Circular Polarization ◽  
Antenna Arrays ◽  
Axial Ratio ◽  
Adaptive Antenna ◽  
Single Element ◽  
Experimental Frequency ◽  
Single Antenna ◽  
L1 And L2 ◽  
Navigation Equipment ◽  
Frequency Dependences

The article analyzes the requirements for antennas used in modern anti-jamming navigation equipment of the consumer of GLONASS. Some options and their disadvantages are considered. Presents the results of the development, computer modeling and experimental study of a breadboard circular polarization antenna layout for the GLONASS system. Tests were carried out for both a single antenna layout and a two-element antenna array. Experimental frequency dependences of such parameters as matching, isolation, gain and axial ratio, as well as radiation patterns at key frequencies are given. The achieved bandwidth covers the L1 and L2 ranges of GLONASS. Based on the results obtained, a conclusion was made about the possibility of using the developed antenna as a single element of adaptive antenna arrays of the GLONASS system.

scholarly journals High-Gain Circularly-Polarized Elliptically-Annular Antenna-Array with Reduced Side-Lobe Level

2020 ◽  
Vol 9 (4) ◽  
pp. 2319-2325
Keyword(s):  
Circular Polarization ◽  
Antenna Array ◽  
Satellite Communication ◽  
Axial Ratio ◽  
Side Lobe ◽  
High Gain ◽  
Side Lobe Level ◽  
Single Element ◽  
Circularly Polarized ◽  
Gain Enhancement

A single feed microstrip patch elliptically annular antenna array has been proposed for high gain circularly polarized (CP) radiation. An array of elliptically annular patches antenna resonates at a frequency of 3.77 GHz which can be used in satellite communication and radar application. A corporate feed network with quarter-wave transformer has been used for uniform excitation of all the array elements. Thus a good circular polarization is obtained by using a single feed with enhanced gain 15.62 dB compared to single patch. The radiation pattern, axial ratio and input impedance of the proposed elliptically annular antenna array is compared with single element elliptically annular antenna. A substantial gain enhancement with low side lobe level (SLL) is observed keeping circular polarization intact. Further, simulated and measured results of the proposed antenna array have been compared and found that axial ratio and gain are in good agreement.

scholarly journals Design Of Array and Circular Polarization Microstrip Antenna For LTE Communication

2018 ◽  
Vol 218 ◽  
pp. 03006 ◽  
Author(s):  
Syah Alam ◽  
Eddy Wijanto ◽  
Budi Harsono ◽  
Fidelia Samandatu ◽  
Markus Upa ◽  
...  
Keyword(s):  
Circular Polarization ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
High Gain ◽  
Impedance Bandwidth ◽  
Single Element ◽  
Substrate Thickness ◽  
Rectangular Patch ◽  
Working Frequency ◽  
Tan Δ

This paper proposes a high gain microstrip antenna with circular polarization for LTE applications at a working frequency of 2300 MHz. Gain of antenna is optimized by using an array method with 4 elements arranged in plannar using feed line of 50 Ohm, 100 Ohm and 70.7 Ohm. The proposed antenna designed using FR-4 substrate with (ɛr) = 4.3, substrate thickness (h) of 1.6 mm and loss tangent (tan δ) of 0.0265. Gain of antenna can be optimized by increasing the number of elements in the array of the antenna. Circular polarization can be obtained by cutting the edge of a rectangular patch antenna with an angle of 45° . From the simulation results obtained reflection coefficient value of -20.02 dB and VSWR of 1.22 at the working frequency of 2300 MHz. The gain of proposed microstrip antenna is 10.56 dB with an impedance bandwidth value of 714 MHz (1925 - 2639 MHz). The proposed antenna obtained a circular polarization with axial ratio of 1.745 dB at working frequency of 2300 MHz. Array method with four elements increased the gain of antena until 45.07% compared to the single element antenna.

scholarly journals Radiation Efficiency Improvement Method for Multifeed Circular Polarization Antenna Array with Mutual Coupling Effect

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Zijian Xing ◽  
Ling Wang ◽  
Jianying Li ◽  
Kun Wei
Keyword(s):  
Circular Polarization ◽  
Antenna Array ◽  
Mutual Coupling ◽  
Coupling Effect ◽  
Design Method ◽  
Axial Ratio ◽  
Radiation Efficiency ◽  
Single Antenna ◽  
Negative Effect ◽  
Low Efficiency

In the circular polarization antenna array, the input impedance, axial ratio, and radiation pattern of antenna patch will be changed. Compared with the performances of single antenna, the mutual coupling also led to the low efficiency of all antennas. A novel radiation efficiency elevation method of multifeed circular polarization (CP) antenna array is demonstrated in this paper, in order to solve the problem. To prove the concept of novel method, dual-feed antenna with stubs is developed and fabricated. According to the measured results, each antenna would increase in efficiency by approximate 1dB by applying this novel design method. Therefore, this paper provides dramatically useful results of lessening the negative effect resulting in mutual coupling.

A Broadband Circularly Polarized Cross-slotted Patch Antenna with Horizontal Meandered Strip (HMS)

Frequenz ◽  
2020 ◽  
Vol 74 (5-6) ◽  
pp. 191-199
Author(s):  
M. K. Verma ◽  
Binod K. Kanaujia ◽  
J. P. Saini ◽  
Padam S. Saini
Keyword(s):  
Circular Polarization ◽  
Patch Antenna ◽  
Impedance Matching ◽  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Radiation Patterns ◽  
Circularly Polarized ◽  
Feeding Technique

AbstractA broadband circularly polarized slotted square patch antenna with horizontal meandered strip (HMS) is presented and studied. The HMS feeding technique provides the good impedance matching and broadside symmetrical radiation patterns. A set of cross asymmetrical slots are etched on the radiating patch to realize the circular polarization. An electrically small stub is added on the edge of the antenna for further improvement in performance. Measured 10-dB impedance bandwidth (IBW) and 3-dB axial ratio bandwidth (ARBW) of the proposed antenna are 32.31 % (3.14–4.35 GHz) and 20.91 % (3.34–4.12 GHz), respectively. The gain of the antenna is varied from 3.5 to 4.86dBi within 3-dB ARBW. Measured results matched well with the simulated results.

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