Results 21 to 30 of about 1,233 (164)

Rancang Bangun Antena Horn Planar Frekuensi 1 – 3 GHz untuk Ground Penetrating Radar

open access: yesJurnal Elkomika
ABSTRAK Antena horn planar merupakan antena yang menggunakan salah satu sisi antena horn berbentuk piramida dan beroperasi pada frekuensi diatas 1000 MHz.
LUCIA JAMBOLA   +2 more
doaj   +1 more source

Microstrip antenna design for use in 4G communication network systems

open access: yesTeknika
4G service coverage only reaches 52.90% of the total area in Indonesia, with an average internet speed of 11.12 Mbps which is one of the lowest internet speeds in Southeast Asia.
M. Reza Ramadhon   +2 more
doaj   +1 more source

Gain improvement of the Yagi-Uda Antenna Using Genetic Algorithm for Application in DVB-T2 Television Signal Reception in Tanzania [PDF]

open access: yesJournal of Interdisciplinary Sciences, 2017
Region 2 UHF Frequency band is the frequency range which is used for transmitting Television signals in East Africa. Yagi-uda antenna is an array Antenna designed for various applications, in this paper a 5-element yagi-uda antenna is designed and ...
Twahir Kazema, Kisangiri Michael
doaj  

A Novel High-Frequency Voltage Standing-Wave Ratio-Based Grounding Electrode Line Fault Supervision in Ultra-High Voltage DC Transmission Systems

open access: yesEnergies, 2017
In order to improve the fault monitoring performance of grounding electrode lines in ultra-high voltage DC (UHVDC) transmission systems, a novel fault monitoring approach based on the high-frequency voltage standing-wave ratio (VSWR) is proposed in this ...
Yufei Teng   +6 more
doaj   +1 more source

On the development of a novel high VSWR programmable impedance tuner [PDF]

open access: yesInternational Journal of Microwave and Wireless Technologies, 2016
Impedance tuners are key instruments used for load- and source–pull measurements. They are crucial for any active microwave components, circuits, and systems characterization and optimization. This paper reports theoretical, simulated, and experimental results related to the development of a novel programmable impedance tuner offering high-voltage ...
Arnaud Curutchet   +6 more
openaire   +1 more source

PENGARUH BAHAN DIELEKTRIK DALAM UNJUK KERJA WAVEGUIDE

open access: yesJIF (Jurnal Ilmu Fisika), 2012
Makalah ini menyajikan hasil studi pengukuran nilai Voltage Standing Wave Ratio (VSWR) dan power reflection factor (PRF) untuk berbagai jenis bahan dielektrik yang akan disisipkan pada saluran transmisi yang beroperasi di frekuensi 9 GH dan dibandingkan ...
Lince Markis
doaj   +1 more source

Design, Fabrication, and Experimental Evaluation of a 435 MHz Helical Antenna for 433 MHz IoT Modules

open access: yesJurnal Elektronika dan Telekomunikasi
The rapid growth of wireless communication demands within Internet of Things (IoT) applications requires antennas that exhibit high efficiency, compact dimensions, and reliable performance in the UHF band.
Rusfa Rusfa   +5 more
doaj   +1 more source

Transmission coefficient estimation based on antenna voltage standing wave ratio under plasma sheath

open access: yesAIP Advances, 2018
Radio blackout has confused the aerospace industry for decades. The highly attenuated caused by the plasma sheath is the main cause of radio blackout. The transmission coefficient depends on the relationship between plasma density, collision frequency ...
Min Yang   +4 more
doaj   +1 more source

Desain dan Implementasi Rectenna Hexagonal Patch Array Pada Frekuensi 2,4 GHz

open access: yesJurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems), 2018
Abstrak– Penelitian rectenna yang dilakukan terdiri atas dua bagian yaitu antena yang berbentuk hexagonal array dan rectifier. Rectenna hexagonal array ini didesain agar bisa menangkap gelombang radio (RF) pada frekuensi 2,4 GHz yang dapat ...
Herma Nugroho rono adi Kusumo   +2 more
doaj   +1 more source

Ultra-Wideband Dual-Polarized Antenna With Three Resonant Modes for 2G/3G/4G/5G Communication Systems

open access: yesIEEE Access, 2019
In this paper, a compact dual-polarized ultra-wideband dipole antenna is realized by exciting three resonant modes using double-loop (DL) dipoles with stepped exponential-shaped (ES) arms.
Yaohui Zhang   +4 more
doaj   +1 more source

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