scholarly journals Perancangan Antena Diplexing Menggunakan Metode Half Mode SIW dengan Metode Cavity Back Slot Sebagai Matching Impedansi

2021 ◽  
Vol 11 (1) ◽  
pp. 1
Author(s):  
Dian Widi Astuti ◽  
Melinda Megahari Putri ◽  
Dian Rusdiyanto
Keyword(s):  
Slot Antenna ◽  
Substrate Integrated Waveguide ◽  
Rectangular Slot

Penggunaan teknologi dinas tetap (fixed-services) bertujuan untuk memenuhi kebutuhan masyarakat akan teknologi telekomunikasi nirkabel. Pada perkembangannya muncul tantangan untuk meningkatkan performa dan efisiensi perangkat teknologi seperti penggunaan lebih dari satu frekuensi dalam satu device. Penelitian ini mendukung tantangan tersebut dengan membuat antena yang dapat bekerja untuk dua resonansi frekuensi (diplexing). Metode yang digunakan untuk mendesain antena diplexing tersebut yaitu Half Mode Substrate Integrated Waveguide (HMSIW) Cavity Backed Slot Antenna (CBSA). Metode CBSA mempunyai kemampuan untuk mencapai matching impedansi dengan mengatur inset-feed dan rectangular slot. Hasil simulasi menunjukan antena dapat bekerja pada frekuensi tengah (fC) 4,5 dan 5,8 GHz.  Nilai S11 dan S22 simulasi masing-masing memperoleh -30 dB dan -16,86 dB, serta nilai S12 dan S21 masing-masing -27 dB dan -26 dB. Sedangkan hasil pengukuran menunjukan antena bekerja pada frekuensi tengah (fC) 4,25 dan 5,67 GHz, dengan nilai S11 dan S22 masing-masing -33,10 dB dan -23,27 dB, serta nilai S12 dan S21 masing-masing -30 dB dan -29,6 dB. Hasil simulasi telah sesuai dengan spesifikasi yang diinginkan. Perbedaan dengan hasil pengukuran dapat disebabkan karena faktor pabrikasi, penyolderan dan proses etching.

scholarly journals Design and analysis of dual dumbbell and rectangular slots SIW cavity-backed antenna at 2.45 GHz

2021 ◽  
Vol 18 (2) ◽  
pp. 211-224
Author(s):  
Velusamy Mekaladevi ◽  
Devi Nirmala ◽  
Madasamy Jayakumar
Keyword(s):  
Slot Antenna ◽  
Substrate Integrated Waveguide ◽  
Wideband Antenna ◽  
Rectangular Slot ◽  
Simulation Results ◽  
Good Agreement

The design and realization of a wideband substrate-integrated waveguide (SIW) cavity-backed slot antenna operating at 2.45 GHz for WLAN applications are presented. Dual dumbbell-shaped slots with rectangular slots are used to achieve increased bandwidth. The bandwidth observed is 160 MHz with the dumbbell-shaped slots. Further, it has been improved up to 9.2% by adding a rectangular slot. The wideband antenna is analyzed using ANSYS HFSS and fabricated on FR-4 substrate. The measured results of the proposed design are in good agreement with the simulation results and comparable with the reported 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.

Increasing the bandwidth of cavity-backed SIW antennas by using stacked cavities

2018 ◽  
Vol 10 (8) ◽  
pp. 942-947
Author(s):  
Hiba Abdel Ali ◽  
Enrico Massoni ◽  
Lorenzo Silvestri ◽  
Maurizio Bozzi ◽  
Luca Perregrini ◽  
...  
Keyword(s):  
Experimental Results ◽  
The Other ◽  
Slot Antenna ◽  
Substrate Thickness ◽  
Substrate Integrated Waveguide ◽  
Rectangular Slot ◽  
Cavity Filters

AbstractThis paper presents a technique to increase the bandwidth in substrate integrated waveguide (SIW) cavity-backed antennas, inspired by the design of cavity filters. The proposed structure consists of a slot antenna backed by two cavities, located one on top of the other and coupled through a slot. To demonstrate the bandwidth increase, a standard cavity-backed SIW antenna, with a rectangular slot etched in the top metal plane, has been designed, manufactured, and measured. Subsequently, a similar antenna was developed, by doubling the substrate thickness with the aim to improve the bandwidth. Finally, the new topology of two-cavity SIW antenna has been implemented and compared with the two previous ones. Simulation and experimental results show that the proposed two-cavity antenna exhibits a bandwidth twice as large as the standard SIW cavity-backed antenna.

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