Search Results

Results (3)

Search Parameters:

Keyword: Frequency spectrum
Order results
Results per page
Open AccessArticle
6 Pages, 2,411 KB Download PDF

Design and Analysis of Frequency Reconfigurable Antenna Embedding Varactor Diodes

Advances in Science, Technology and Engineering Systems Journal, Volume 4, Issue 6, Page # 371–376, 2019; DOI: 10.25046/aj040647
Abstract:

In this paper, we present a broadband frequency tunable antenna embedding varactor diodes. The reference antenna structure is a square antenna of patch dimensions [39,2 × 39,2] mm², operating at a single resonance frequency 2.45GHz. The recommended procedure to achieve the frequency shifting is to etch rectangular slots on the patch and to embed two…

Read More
(This article belongs to Section Telecommunications (TEL))
Open AccessArticle
12 Pages, 819 KB Download PDF

DFIG Defects Diagnosis Method for Wind Energy Conversion Chain

Advances in Science, Technology and Engineering Systems Journal, Volume 4, Issue 5, Page # 174–185, 2019; DOI: 10.25046/aj040523
Abstract:

This paper is an extension of research work originally presented in 2018 IEEE fifth International Congress on Information Science and Technology (CiSt). The research consists on developing method to diagnose electrical defects affecting wind turbine doubly-fed induction generator DFIG which constitutes a crucial part of wind energy conversion chain. First off all, we create a…

Read More
(This article belongs to the SP8 (Special Issue on Multidisciplinary Sciences and Engineering 2019-20) & Section Electrical Engineering (ELE))
Open AccessArticle
12 Pages, 1,450 KB Download PDF

An Extension of Throughput Drop Estimation Model for Three-Link Concurrent Communications under Partially Overlapping Channels and Channel Bonding in IEEE 802.11n WLAN

Advances in Science, Technology and Engineering Systems Journal, Volume 4, Issue 4, Page # 94–105, 2019; DOI: 10.25046/aj040411
Abstract:

The IEEE 802.11n wireless local-area network (WLAN) has been extensively deployed around the world due to the flexibility, lower cost, and the high-speed data transmission capability at 2.4 GHz ISM band. However, in the WLAN deployment, one key challenge is to optimize the channel assignment of access-points (APs) under the small number of partially overlapping…

Read More
(This article belongs to the SP7 (Special Issue on Advancement in Engineering and Computer Science 2019) & Section Telecommunications (TEL))

Journal Menu

Journal Browser


Special Issues

Special Issue on Digital Frontiers of Entrepreneurship: Integrating AI, Gender Equity, and Sustainable Futures
Guest Editors: Dr. Muhammad Nawaz Tunio, Dr. Aamir Rashid, Dr. Imamuddin Khoso
Deadline: 30 May 2026

Special Issue on Sustainable Technologies for a Resilient Future
Guest Editors: Dr. Debasis Mitra, Dr. Sourav Chattaraj, Dr. Addisu Assefa
Deadline: 30 April 2026