Results 71 to 80 of about 126,874 (155)

Research and Implementation of OFC-Based Multicarrier Sliceable Bandwidth Variable Transponders in Hybrid Laser/Microwave Satellite Networks

IEEE Access
In this paper, a multicarrier sliceable bandwidth variable transponder based on optical frequency comb (OFC) is proposed. The structure of the transponder’s internal switching unit is designed, and the principle of generating ultra-flat OFC based ...
Bin Wu, Hao Zhang, Qingchun Zhao
doaj   +1 more source

Fault isolation detection expert (FIDEX). Part 1: Expert system diagnostics for a 30/20 Gigahertz satellite transponder [PDF]

LeRC has recently completed the design of a Ka-band satellite transponder system, as part of the Advanced Communication Technology Satellite (ACTS) System.
Durkin, John, Schlegelmilch, Richard, Tallo, Donald   +2 more
core   +1 more source

Adaptive Modular Detection With Dynamic Decision Mechanism for Robust Soil Attachment Recognition on Angelica Roots

IEEE Access
Accurate and real-time detection of soil attachment on Angelica dahurica roots is essential for stabilising post-harvest handling quality and energy consumption.
Xin Gao, Shuntao Sui, Huixia Jiang, Jinxia Yao, Haotian Zhang   +4 more
doaj   +1 more source

Compact 8-Port Low-Profile Antenna Array for 5G Mobile Phones

International Journal of Antennas and Propagation
A compact eight-element frame antenna array covering the 5G n79 frequency band (4.4–5.0 GHz) has been proposed in this paper. Considering the demands in the application of 5G ultrathin smartphones, the antenna unit has been miniaturized and designed with
Hongtao Chen, Hui Zhou, Hang Jin, Chenghao Yuan, Yanqun Fang, Mingmin Zhu, Guoliang Yu, Yang Qiu, Hao-Miao Zhou   +8 more
doaj   +1 more source

Tunable Filters Using Defected Ground Structures at Millimeter-Wave Frequencies

Micromachines
This paper explores the potential of phase change materials (PCM) for dynamically tuning the frequency response of a dumbbell u-slot defected ground structure (DGS)-based band stop filter.
Kaushik Annam, Birhanu Alemayehu, Eunsung Shin, Guru Subramanyam   +3 more
doaj   +1 more source

Improved Gain of a Compact Slot Antenna using an FSS Reflector for GNSS L1/E1/B1/G1 bands [PDF]

Radioengineering
In this paper, a compact stepped slot antenna, for Global Navigation Satellite System (GNSS) applications, is proposed. The latter one, which operates in the frequency range from 1.49 GHz to 1.66 GHz, is designed to cover five GNSS bands namely GPS-L1 ...
A. Boularas, M. Flissi, K. Rouabah, B. Hammache   +3 more
doaj  

An improved zeroth order resonator using left handed metamaterial

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
In this paper an improved version of zeroth order resonator (ZOR) using Left Handed Metamaterial (LHM) is reported, and its performance is compared with the earlier published ZOR.
Dileep Kumar Upadhyay, Srikanta Pal
doaj   +1 more source

Brushless d.c. torque motor first quarterly report, 25 jun. - 25 sep. 1964 [PDF]

Brushless direct current torque ...
Skamfer, R. L., Yates, W. W.
core   +1 more source

Interference Management in Heterogeneous Networks with Blind Transmitters

, 2016
Future multi-tier communication networks will require enhanced network capacity and reduced overhead. In the absence of Channel State Information (CSI) at the transmitters, Blind Interference Alignment (BIA) and Topological Interference Management (TIM ...
Johnson, Oliver, Kalokidou, Vaia, Piechocki, Robert   +2 more
core