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Komeylian, S., Tayarani, M., Sedighi, S.H.. (1402). Design of Miniaturized Microstrip Antenna with Semi-fractal Structure for GPS/GLONASS/Galileo Applications. فناوری آموزش, 11(2), 373-382. doi: 10.22061/jecei.2023.9352.609
S. Komeylian; M. Tayarani; S.H. Sedighi. "Design of Miniaturized Microstrip Antenna with Semi-fractal Structure for GPS/GLONASS/Galileo Applications". فناوری آموزش, 11, 2, 1402, 373-382. doi: 10.22061/jecei.2023.9352.609
Komeylian, S., Tayarani, M., Sedighi, S.H.. (1402). 'Design of Miniaturized Microstrip Antenna with Semi-fractal Structure for GPS/GLONASS/Galileo Applications', فناوری آموزش, 11(2), pp. 373-382. doi: 10.22061/jecei.2023.9352.609
Komeylian, S., Tayarani, M., Sedighi, S.H.. Design of Miniaturized Microstrip Antenna with Semi-fractal Structure for GPS/GLONASS/Galileo Applications. فناوری آموزش, 1402; 11(2): 373-382. doi: 10.22061/jecei.2023.9352.609

Design of Miniaturized Microstrip Antenna with Semi-fractal Structure for GPS/GLONASS/Galileo Applications

Journal of Electrical and Computer Engineering Innovations (JECEI)
دوره 11، شماره 2، مهر 2023، صفحه 373-382    اصل مقاله (1.57 M)
نوع مقاله: Original Research Paper
شناسه دیجیتال (DOI): 10.22061/jecei.2023.9352.609
نویسندگان
S. Komeylian1؛ M. Tayarani* 1؛ S.H. Sedighi2
1Department of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran.
2School of New Technologies, Iran University of Science and Technology, Tehran, Iran.
تاریخ دریافت: 17 آبان 1401،  تاریخ بازنگری: 19 بهمن 1401،  تاریخ پذیرش: 10 اسفند 1401 
چکیده
Background and Objectives: Microstrip patch antennas are widely used due to their advantages of compact size and easy fabrication compared to other types. However, they have low-performance parameters. As a result, several techniques are used to improve performance parameters in newly designed microstrip antennas. In this study, a novel miniaturized microstrip antenna with circular polarization (CP) is proposed for GNSS applications.
Methods: In the design process, the semi-fractal structure is used to reduce the antenna size. Circular polarization is generated using a three-feed configuration with 120◦ phase shift. The CP value is increased by use of perturbing slots and also removing the corners. The novel design of the feeding network and also considering the ground size same as the patch layer, keep the antenna size small. The co-axial probe is used in the feeding network and it is printed on Taconic RF-43 substrate with a low loss tangent of 0.0033. Numerical simulation is applied via CST commercial software to evaluate the antenna performance. The simulations are repeated in two other software, HFSS and FEKO, to validate the study.
Results: The proposed antenna has a compact size of 17.56 cm2. The single-layer structure of the designed antenna leads to easy fabrication feature. The proposed antenna has a bandwidth of 55 MHz (1.558-1.614 GHz). It can operate at GPS L1 (1575 MHz), GLONASS G1 (1602 MHz), Galileo E1 (1589 MHz), and E2 (1561 MHz) bands. Results show a high front-to-back ratio (FBR) of 40 dB, RHCP gain of 3.45 dB, and pure CP with axial ratio (AR) beamwidth of 108⸰. Furthermore, the phase center variation (PCV) is less than 0.16 mm.
Conclusion: Key features of the proposed antenna are its novel fractal structure that leads to compact size, high front-to-back ratio, wide RHCP beamwidth with desirable bandwidth, and axial ratio beamwidth.
کلیدواژه‌ها
Miniaturized aAtenna؛ Low-profile Antenna؛ Semi-fractal Structure؛ Multiple Feed Configuration؛ Pure Polarization
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