Browse Items (62 total)
- Collection: Vol. 18, No. 1 2020
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TELKOMNIKA Telecommunication, Computing, Electronics and Control
Power factor improvement on LED lamp driver using BIFRED converter
This paper presents the implementation of a power converter to improve power factor for LED lamp driver. The power converter which used in this system is the integration of boost and flyback converter (boost integrated flyback rectifier energy…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Design and development broadband monopole antenna for in-door application
This paper describes the broadband monopole antenna refers to a signal
wideband of the frequencies, which can be divided the signal into channels of the frequency bins. Aim this paper to design and development broadband monopole antenna. The…
wideband of the frequencies, which can be divided the signal into channels of the frequency bins. Aim this paper to design and development broadband monopole antenna. The…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Overset grid generation with inverse scattering technique for object and crack detection
This paper presents the forward backward time stepping (FBTS) technique with finite difference time domain (FDTD) method and overset grid generation (OGG) method was applied for the reconstruction of object and crack detection. Object and crack…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Study on the effect of the substrate material type and thickness on the performance of the filtering antenna design
This article presents a new design of a four-pole microstrip filtering antenna. The filtering antenna consists of a bandpass filter, which has four resonators integrated to a monopole patch antenna. The filtering antenna is designed with a relatively…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Design and fabrication of A Ku-band low noise amplifier using FR-4 substrate
The low noise amplifier (LNA) plays an important role in many
communication systems, especially at the receiver’s front-ends. In modern RF designs, The LNA is usually fabricated on a microstrip printed circuit board (PCB) due to its simplicity and…
communication systems, especially at the receiver’s front-ends. In modern RF designs, The LNA is usually fabricated on a microstrip printed circuit board (PCB) due to its simplicity and…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A compact size microstrip five poles hairpin band-pass filter using three-layers structure for Ku-band satellites application
This paper presents a reduced size microstrip five poles hairpin band-pass filter using three-layers structure for Ku-band satellites application.
The three-layers structure shows a substantially reduced filter size and
enlarged bandwidth. The…
The three-layers structure shows a substantially reduced filter size and
enlarged bandwidth. The…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Complimentary split ring resonator sensor with high sensitivity based on material characterization
A new model of microwave planar sensor established on the complementary split ring resonator (CSRR) as well as an air hole in substrate of the structure is introduced for a precise measurement of materials permittivity. The hole is filled into…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Intelligent alarm system for hospitals using smartphone technology
During the last decade, attention was paid to detect the accident and call
the ambulance as soon as possible, the situation was neglected after the arrival of the patient to the specified service point. This negligence led to
an increase in the…
the ambulance as soon as possible, the situation was neglected after the arrival of the patient to the specified service point. This negligence led to
an increase in the…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Study on outage performance gap of two destinations on CR-NOMA network
Non-orthogonal multiple access (NOMA) and cognitive radio (CR) are
promising to overcome spectral scarcity problem encountered in applications implementations in wireless communication. Especially, massive connectivity in such network is strict…
promising to overcome spectral scarcity problem encountered in applications implementations in wireless communication. Especially, massive connectivity in such network is strict…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A survey on android security: development and deployment hindrance and best practices
Android OS is the most popular mobile OS for the past few years. Vulnerabilities arise with respect to the increasing functionality of Android OS, impolitic app development practices of developers, end-user incautious and interestingly remediation…