Results 121 to 130 of about 357,995 (293)

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

Economic Viability of Photovoltaic Systems Providing Frequency Containment Reserve

Advanced Energy and Sustainability Research, EarlyView.
This article investigates the feasibility of photovoltaic (PV) systems providing frequency containment reserve (FCR) in the Netherlands. The economic analysis demonstrates that a PV plant can profitably participate in FCR without battery storage by maintaining an active power reserve.
Emil Petkovski, Mari S. Bogen, Theo Bosma, Marcel Eijgelaar   +3 more
wiley   +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

Probabilistic Modeling for Prediction Errors to Enhance Balancing Market Participation of Photovoltaic Systems: Error Threshold Estimation, Multisite Aggregation, and Overloading Effects

Advanced Energy and Sustainability Research, EarlyView.
This study proposes a method to increase the value of solar power in balancing markets by managing prediction errors. The approach models prediction uncertainties and quantifies reserve requirements based on a probabilistic model. This enables the more reliable participation of photovoltaic plants in balancing markets across multiple sites, especially ...
Jindan Cui, Xue Fang, Takashi Oozeki, Yuzuru Ueda   +3 more
wiley   +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

Crater Observing Bioinspired Rolling Articulator (COBRA)

Advanced Intelligent Systems, EarlyView.
Crater Observing Bio‐inspired Rolling Articulator (COBRA) is a modular, snake‐inspired robot that addresses the mobility challenges of extraterrestrial exploration sites such as Shackleton Crater. Incorporating snake‐like gaits and tumbling locomotion, COBRA navigates both uneven surfaces and steep crater walls.
Adarsh Salagame, Henry Noyes, Eric Sihite, Arash Kalantari, Alireza Ramezani   +4 more
wiley   +1 more source

Worm‐Inspired Soft Robots With Modular Outfit‐Changing for Intelligent Multienvironment Adaptation

Advanced Intelligent Systems, EarlyView.
This study proposes a worm‐inspired soft robot capable of locomotion across multiple environments through a modular “outfit‐changing” strategy. The robot integrates pneumatically actuated peristaltic segments with interchangeable external modules, enabling efficient motion on ground surfaces, within pipelines, through granular media, and underwater ...
Xiaomin Liu, Heng Wei, Zhengxin Guo, Zheng Liu, Yi Jin, Yunwei Zhao, Changyong Chase Cao   +6 more
wiley   +1 more source

Study of different shape Electromagnetic Band Gap (EBG) structures for single and dual band applications

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
In this paper, single and dual band EBG structures for wider bandwidth are proposed. In each of the discussed EBGs, a metallic patch of regular geometry is chosen for the unit element.
Nagendra Kushwaha, Raj Kumar
doaj   +1 more source

Frequency Selective Rasorber With Low Insertion Loss and Ultra‐Broadband Scattering Reduction

Advanced Physics Research, EarlyView.
We present a dual‐polarization broadband frequency selective rasorber featuring a transmission window in the middle of its absorption band. The proposed FSR achieves a –10 dB reflection band over 3.68–16.94 GHz with a fractional bandwidth of 128.6%, featuring a minimum insertion loss of 0.3 dB at 10.3 GHz.
Ziming Yu, Chong He, Liping Liu, Liming Si, Weiren Zhu   +4 more
wiley   +1 more source