Circularly Polarized Proximity-Fed Microstrip Array Antenna for Micro Satellite

Darsono, Muhammad; Wijaya, Endra

doi:10.12928/telkomnika.v11i4.1204

Cited by 7 publications

(6 citation statements)

References 5 publications

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“…The change in electrical length is closely related with the operating frequency of transmission line as is given by Equation (1) and (2) [20]. For operating frequency in unilluminated state (OFF-state) is given by [21][22][23], meanwhile in illuminated state (ON-state) is given by Equation (4).…”

Section: Optical Switchesmentioning

confidence: 99%

Optically Switched Frequency for Reconfigurable Dipole Antenna Using Photodiode Switches

2016

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The design, fabrication, and measurement of reconfigurable antenna using photodiode switches have been investigated. The IntroductionAntenna is a basic component in communication system. It is very important and needed in communication system, specifically wireless communication system which has been running remarkably and dynamic. It causes the increase demand of antennas. Communication system which is generally complex needs antennas which have advance capabilities and good performances. So, many researchers have conducted experiments attempting to improve capabilities and performances of antenna in order to meet the need of communication system which grows continuously.One type of antenna which is able to accommodate the change of communication system necessity is reconfigurable antenna [1]. Such an antenna is able to adjust with the necessity of the communication system. In some ways it can convert operating frequency, radiation pattern, impedance, bandwidth via shorting/reactive loading to require resonant mode switching, by moving part (mechanical reconfiguration), optical switching, electronic switching, and feed network switching. Due to the fact that reconfigurable antenna adjustable, this antenna can eliminate the need of multiple antenna for communication systems.An innovative approach to the synthesis of phase-only reconfigurable, isophoric linear sparse arrays has been investigated in previous research [2]. The result shows the abilility to commute their pattern within an arbitrary number of radiation modalities which leads to an effective procedure for the fast antennas design with high performance. In other research, presenting at [3][4][5], mentioned that reconfigurable antenna were fabricated on high-resistivity silicon and equipped with two silicons as material switches. Then the laser was used to control the photoconductive switching material. The technique is conducted to prove that changes of effective length of antenna, it can change antenna resonance frequency. However, using silicon as photoconductive switches will require complicated technique during it insertion process on antenna substrate and silicon has high cost. Other techniques, is done previously by Kiriazi et al. in [6]. In this work, open and short of RF-MEMS switches were assembled on antenna which has a high-resistivity silicon substrate. In [7], varactor diode is used as switches. The other switching elements which are PIN diodes [8][9][10][11][12][13], an air gap [14][15], solar cell [16], and photodiode [17] have also been used at previous research. Therefore, in this paper we introduce a new optical switches geometry and technique of reconfigurable antennas by using photodiode as optical switching.

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Section: Optical Switchesmentioning

confidence: 99%

Optically Switched Frequency for Reconfigurable Dipole Antenna Using Photodiode Switches

2016

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“…Antena radar generasi pertama menggunakan antena mikrostrip. Antena mikrostrip merupakan salah satu jenis antena yang mempunyai kelebihan yaitu low profile, ringan, ukuran kecil, fabrikasi mudah dan murah, polarisasi linier maupun sirkuler, bentuknya yang compact sehingga cocok untuk komunikasi bergerak, dan dapat beroperasi pada single, dual maupun multiband [6]- [9].…”

Section: Pendahuluanunclassified

Modul Antena dengan Susunan Uniform untuk Sistem Antena Radar Generasi Kedua

Oktafiani

Saputera

Maulana

et al. 2016

INKOM

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Pada penelitian ini dilakukan perancangan dan fabrikasi modul antena dengan susunan uniform untuk sistem antena radar generasi kedua. Modul antena yang dirancang terdiri dari empat buah sub-modul yang disusun secara vertikal. Sub-modul terdiri dari susunan delapan patch berbentuk persegi yang diatur sejajar ke arah horizontal dengan metode pencatuan coaxial feed pada titik tengah sub-modul. Setiap patch antena diberi daya yang sama sehingga susunan berbentuk uniform (seragam). Antena dicetak pada bahan duroid dengan nilai εr 2,2 dengan ketebalan 1,57 mm. Hasil pengukuran antena menunjukkan bahwa antena dapat bekerja pada frekuensi 9,4 Ghz dengan nilai VSWR (Voltage Standing Wave Ratio) ≤1,5. Gain antena yang didesain sebesar 20.08 dBi dengan beamwidth horizontal 10˚ dan beamwidth vertikal 20˚.

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“…Antenna type that used is microstrip antenna, because it has small dimension, lightweight, ease to fabricate and low cost. One of microstrip weakness is it has low gain, so that to increase its gain then designed array microstrip antenna [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%