Realisasi dan Pengujian Antena Mikrostrip Array 4 Elemen dengan Polarisasi Melingkar untuk Aplikasi 4G/LTE

Abstract

ABSTRAKPenelitian ini mengusulkan desain antena mikrostrip array empat elemen dengan polarisasi melingkar pada frekuensi kerja 2300 MHz untuk aplikasi 4G/LTE. Antena telah dirancang dan dipabrikasi menggunakan substrat jenis FR-4 Epoxy dengan nilai konstanta dielektrik (Ɛr) = 4.3, ketebalan substrat (h) = 1.6 mm dan loss tangen (tan δ) = 0.0265 dengan pencatu microstrip line. Polarisasi melingkar dengan axial ratio ≤ 3 dB dihasilkan dengan menggunakan metode truncated corner sedangkan untuk meningkatkan nilai gain digunakan metode array empat elemen. Dari hasil proses pengukuran diperoleh nilai koefisien refleksi sebesar -16.52 dB, VSWR sebesar 1.37 pada frekuensi kerja 2300 MHz dengan bandwidth yang diperoleh dari hasil pengukuran adalah 400 MHz (2050 MHz - 2450 MHz). Metode truncated corner berhasil menghasilkan polarisasi melingkar dengan nilai axial ratio 1.745 dB dan berhasil menghasilkan nilai gain sebesar 9.04 dB pada frekuensi kerja 2300 MHz untuk aplikasi LTE.Kata kunci: Antena, mikrostrip, koefisien refleksi, array, truncated corner ABSTRACTThis research proposed a four-element microstrip array antenna design withcircular polarization at a working frequency of 2300 MHz for 4G / LTEapplications. The antenna has been designed and fabricated using a FR-4 Epoxy substrate with a dielectric constant value (Ɛr) = 4.3, substrate thickness (h) = 1.6 mm and tangent loss (tan δ) = 0.0265 with microstrip line feeding. The circular polarization with axial ratio ≤3 dB was generated using the truncated corner method while for increasing the gain value used the four element array method. From the result of the measurement process, the reflection coefficient value is obtained -16.52 dB, VSWR of 1.37 at 2300 MHz working frequency with bandwidth obtained from the measurement result is 400 MHz (2050 MHz - 2450 MHz). The truncated corner method succeeded in generating a circular polarization with the axial ratio of 1.745 dB and succeeded to obtain the gain of 9.04 dB at work frequency of 2300 MHz for LTE application. Keywords: Antena, microstrip, reflection coefficient, array, truncated corner

Circle Microstrip Antenna Simulation for Frequency 3.5 GHz

“…Using a thick substrate and a large εr value will increase dielectric losses and this will reduce antenna efficiency [5].Therefore substrate is used to avoid decreasing the efficiency of the antenna, the chosen substrate in this study was Rogers RT5880 which has a substrate thickness of 1.57 mm and a value of εr = 2.2.More complete substrate specifications can be seen in table 1 From table 1 antenna that will be create using Rogers RT5880 substrate which has h = 1.57 mm thickness and εr = 2.2 value, an antenna with a 3.5 GHz working frequency created by using a circle patch. Circle patch is a radiating element with a radius of A, to find the value of A can use equation ( 1) [5]. Antennas are expected to have return loss values ≤ -15 and VSWR ≤ 1.5 as the initial reference.…”

Design of Rectifier Antenna (RECTENNA) for Electromagnetic Energy Harvesting at Frequency of 3500 MHz

“…Because the antenna to be made is the array antenna, each antenna must be separated between the midpoints of patch. The distance of two patch antenna ( ) can be written by using the equation [9],…”

“…After determining antenna characteristics and choosing the substrate that to be used, afterward, calculate the patch antenna dimension. Before computing of the value of the patch antenna dimension, first, calculate the logarithmic function value of the radiating element F using[9];…”

“…1, No. 1, 2021After getting the F value, then it can be count the radius of patch antenna ( ) by utilizing equation[9];…”

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“…Antena yang dirancang adalah antena mikrostrip yang berbentuk bujur sangkar dengan susbtrat FR-4 epoxy. Spesifikasi dari substrat jenis FR4 Epoxy yang digunakan ditunjukkan pada tabel 1 (WIYANTO, E., ALAM, S., & HARSONO, B, 2018 Dalam perancangan desain antena awal antena mikrostrip terlebih dahulu diketahui karakteristik dari komponen bahan penyusun antena diantaranya spesifikasi papan substrat yang digunakan, frekuensi yang ditentukan, panjang dan lebar elemen patch antena. Dari nilai tersebut diperoleh dimensi antena mikrostrip (W dan L).…”