Bandwidth Enhancement of an Antipodal Vivaldi Antenna Facilitated by Double-Ridged Substrate-Integrated Waveguide

2020 ◽  
Vol 68 (12) ◽  
pp. 8192-8196
Author(s):  
Jing-Ya Deng ◽  
Run Cao ◽  
Dongquan Sun ◽  
Yin Zhang ◽  
Li-Xin Guo
Keyword(s):  
Substrate Integrated Waveguide ◽  
Bandwidth Enhancement ◽  
Vivaldi Antenna

Vivaldi antenna with reduced RCS using half‐mode substrate integrated waveguide

2014 ◽  
Vol 50 (5) ◽  
pp. 345-346 ◽  
Author(s):  
Yongtao Jia ◽  
Ying Liu ◽  
Yuwen Hao ◽  
Shuxi Gong
Keyword(s):  
Substrate Integrated Waveguide ◽  
Vivaldi Antenna

scholarly journals Miniaturization and Bandwidth Enhancement of Quarter-mode and Half-mode SIW Cavity-Backed Antenna for 5G Applications

2020 ◽  
pp. 112-116
Author(s):  
Cowsigan S P ◽  
Saraswady D
Keyword(s):  
Dielectric Loss ◽  
Surface Waves ◽  
Return Loss ◽  
Copper Surface ◽  
Substrate Integrated Waveguide ◽  
Resonant Frequencies ◽  
Bandwidth Enhancement ◽  
Low Dielectric ◽  
Rectangular Waveguides ◽  
Triple Band

Substrate Integrated Waveguide (SIW) is a special antenna technology which retains reduced copper surface waves and low dielectric loss property of classical rectangular waveguides. The antennas developed on SIW have simple configuration with an ease of fabrication in flame redundant wearable and integration in walls and floors. In this sense a Quarter-mode SIW (QMSIW) antenna has been designed, analyzed and its performance has been compared with Half-mode SIW. QMSIW has been precisely designed to operate efficiently in the range of 40 - 57 GHz. It aims at enhancing the bandwidth for 5G applications with a maximum return loss of -36 db at 55 GHz. HMSIW structure has Triple band resonant frequencies at 20.5 GHz, 24.7 GHz & 27 GHz with the return loss values of -34 db, -14 db & -32.5 db respectively. Both antennas operate in 20 – 72 GHz range of 5G applications.

scholarly journals Bandwidth Enhancement of Substrate Integrated Waveguide Cavity-backed Bow-tie-complementary-ring-slot Antenna using a Shorted-via

2018 ◽  
Vol 68 (2) ◽  
pp. 197 ◽  
Author(s):  
Arvind Kumar ◽  
S. Raghavan
Keyword(s):  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Substrate Integrated Waveguide ◽  
Radiation Characteristics ◽  
New Approach ◽  
Bandwidth Enhancement ◽  
The Individual ◽  
Better Than ◽  
Bow Tie ◽  
Good Agreement

In this study, a planar cavity-backed bow-tie-complementary-ring-slot antenna is proposed, and a new approach for bandwidth enhancement using a shorted-via is introduced. A shorted-via concept overcomes the narrow impedance bandwidth of a conventional substrate integrated waveguide cavity-backed antenna. By adjusting the location of the shorted-via (placed just above the centroid of the radiating slot), the individual bandwidth of the lower and higher order resonances has been tuned below -10 dB criterion, which results in the broadening of the bandwidth. Finally, the antenna is proficient to operate for an impedance bandwidth of 15.71 per cent, ranging from 12.02~14.07 GHz. The proposed antenna shows a gain of better than 4 dBi within the operating band with less than 0.5 dBi variation. Moreover, the antenna preserves good radiation characteristics, which is similar to that of the conventional metallic counterpart. To validate the simulated results, an antenna is fabricated and tested. The simulated results in terms of the reflection coefficient, gain, and radiation patterns are in good agreement with the measured results.

scholarly journals Bandwidth Enhancement on Half-Mode Substrate Integrated Waveguide Antenna Using Cavity-Backed Triangular Slot

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Dian Widi Astuti ◽  
Muhamad Asvial ◽  
Fitri Yuli Zulkifli ◽  
Eko Tjipto Rahardjo
Keyword(s):  
Waveguide Structure ◽  
Slot Antenna ◽  
Center Frequency ◽  
Substrate Integrated Waveguide ◽  
Fractional Bandwidth ◽  
Radiation Characteristics ◽  
Bandwidth Enhancement ◽  
Rectangular Slot ◽  
Design Evolution ◽  
Good Agreement

This paper proposes bandwidth enhancement of a cavity-backed slot antenna using a triangular slot on a half-mode substrate integrated waveguide structure antenna. The bandwidth enhancement was achieved by combining the fixed TE101 and the downward shifting TE102 modes, resulting in hybrid modes. The design evolution of the slot antenna from a half nonresonating rectangular slot to a triangular slot antenna increased the fractional bandwidth. The simulation result showed that fractional bandwidth increased from 6.27% to 9.1%. It was confirmed by measurement that the fractional bandwidth of 9.87% was achieved which reflects a 350 MHz bandwidth with center frequency at 3.84 GHz. The measured gain at center frequency was 4.2 dBi. It is shown that the radiation characteristics obtained from both measurement and simulation results are in very good agreement.

BANDWIDTH ENHANCEMENT OF VIVALDI ANTENNA USING TRIANGULAR SHAPED SLOTS

2016 ◽  
Vol 78 (6-3) ◽  
Author(s):  
Wan Nur Aqilah Wan Ahmad Khairuddin ◽  
Mohd Azlishah Othman ◽  
Muhammad Syafiq Noor Azizi ◽  
Mazri Yaakob ◽  
Mohamad Hafize Ramli
Keyword(s):  
Computer Simulation ◽  
Resonant Frequency ◽  
Return Loss ◽  
High Gain ◽  
Simulation Software ◽  
Simulation Technology ◽  
Wide Bandwidth ◽  
Bandwidth Enhancement ◽  
Measurement Result ◽  
Vivaldi Antenna

This paper discusses about a bandwidth enhancement of Vivaldi antenna loaded using triangular shaped. Firstly, a normal Vivaldi antenna using FR-4 substrate had been designed. Then, the triangular shaped slots had been added at the upper layer of the antenna. It shows the better improvement in return loss, gain, directivity and bandwidth operated at frequency of 10 GHz after the addition of the triangular shaped slot. The advantages of a Vivaldi antenna such as simplicity, wide bandwidth, and high gain at microwave.The return loss of this Vivladiantenna with triangular slot is – 18.495 dB at resonant frequency of 10 GHz while for Vivaldi antenna is - 17.818 dB at 10 GHz for measurement result. This proposed antenna had been designed and simulated using Computer Simulation Technology (CST) simulation software.

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