PUTRIANA, PUTRIANA (2025) ANTENA MIKROSTRIP MIMO 2X1 PADA C-BAND DENGAN TEKNIK PATCH RECTANGULAR DAN DGS UNTUK PENERAPAN PADA 5G. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
This research designs and analyzes a 2×1 MIMO microstrip antenna with a rectangular patch operating at 4 GHz for 5G C-Band applications. Five antenna designs were developed, consisting of one antenna without DGS and four antennas with various DGS shapes: rectangular, triangular, diamond, and nonagon. The design process was simulated using Ansys HFSS and tested using a Vector Network Analyzer. Simulation results showed good performance for all designs, with return loss values of S11 and S22 < –20 dB, gain ≥ 4 dBi, bandwidth ≥ 100 MHz, and element isolation (S21) around –17 to –18 dB. Radiation patterns in simulation were generally omnidirectional, while measurements indicated frequency shifts (4.12–4.25 GHz) and radiation pattern variations due to fabrication tolerance and environmental conditions. Among all designs, the nonagon-shaped DGS antenna showed the best performance, with a gain of 4.09 dBi, bandwidth of 138.5 MHz, and directional radiation pattern. These results indicate that DGS geometry significantly affects antenna performance in supporting 5G communication systems. Keywords: Microstrip Antenna, 2×1 MIMO, Rectangular Patch, DGS, 5G, CBand. Penelitian ini merancang dan menganalisis antena mikrostrip MIMO 2x1 dengan patch persegi panjang yang beroperasi pada frekuensi 4 GHz untuk aplikasi 5G C-Band. Terdapat 5 (lima) desain antena yang dikembangkan, terdiri dari 1 (satu) antena tanpa DGS dan 4 (empat) antena dengan berbagai bentuk DGS: persegi panjang, segitiga, ketupat, dan segi sembilan. Proses desain disimulasikan menggunakan Ansys HFSS dan diuji menggunakan Vector Network Analyzer. Hasil simulasi menunjukkan kinerja yang baik untuk semua desain, dengan nilai return loss S11 dan S22 < –20 dB, gain ≥ 4 dBi, bandwidth ≥ 100 MHz, dan isolasi antar elemen (S21) sekitar –17 hingga –18 dB. Pola radiasi dalam simulasi umumnya omnidireksional, sementara pengukuran menunjukkan pergeseran frekuensi (4,12–4,25 GHz) dan variasi pola radiasi akibat toleransi fabrikasi dan kondisi lingkungan. Dari semua desain, antena DGS segi sembilan menunjukkan kinerja terbaik, dengan gain 4,09 dBi, bandwidth 138,5 MHz, dan pola radiasi terarah. Hasil ini menunjukkan bahwa bentuk DGS secara signifikan memengaruhi kinerja antena dalam mendukung sistem komunikasi 5G. Kata Kunci: Antena Mikrostrip, 2x1 MIMO, Patch Persegi Panjang, DGS, 5G, C-Band.
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