Results 231 to 240 of about 184,549 (262)

Gain enhancement of a dual-band monopole antenna loaded with dual-band AMC

2017 IEEE Applied Electromagnetics Conference (AEMC), 2017
A dual-band Artificial magnetic conductor (AMC) based dual-band antenna operating over WLAN (2.4/5.2/5.8 GHz) bands is presented. The proposed antenna structure consists of a CPW-fed dual-band monopole, loaded with 4×3 AMC unit cells and has a compact dimension of 60×45 mm2.
Vivek Kumar Pandit, A. R. Harish
openaire   +1 more source

A Circularly Polarized Dual-Band Microstrip Antenna

IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005., 2005
In this paper, we present a dual-band CP patch antenna based on the branch-line coupler feeding technique. The compactness of the dual-band antenna is obtained by inserting a small high-frequency patch into a large low-frequency one. Both patches are printed on the same upper substrate and electromagnetically fed through two perpendicular slots etched ...
Luxey, Cyril, Ferrero, Fabien, Jacquemod, G., Staraj, Robert   +3 more
openaire   +3 more sources

Integrating a dual‐band filter into the dual‐band VCO module to achieve harmonic suppression

Microwave and Optical Technology Letters, 2008
AbstractA dual‐band voltage‐controlled oscillator (VCO) module is proposed by integrating a novel dual‐band filter with a dual‐band VCO. The resonator designed with the LC‐tuned concept in the VCO is capable of switching between two frequency bands.
Ching‐Wen Tang, Wei‐Hsien Chu
openaire   +1 more source

Synchronous and asynchronous operation in dual‐band VCOs

International Journal of Circuit Theory and Applications, 2018
SummaryWe present a comprehensive analysis of the asynchronous and synchronous operations of fourth‐order oscillators underlying dual‐band voltage‐controlled oscillators. We analyze the occurrence of the self‐synchronization phenomenon (internal resonance) if the ratio of normal frequencies is nearly a ratio of integers, which is 1:3 in the cubic ...
Buonomo, Antonio, Lo Schiavo, Alessandro
openaire   +2 more sources

Novel dual‐band matching network for concurrent dual‐band power amplifier applications

Microwave and Optical Technology Letters, 2015
ABSTRACTThis article presents a novel and simple dual‐band (DB) matching network (MN) consisting of a traditional single‐band MN with a DB stub‐loaded line‐based network in cascade. Design equations are presented, and design procedures are elaborated.
Qian‐Fu Cheng, Hai‐Peng Fu, Shou‐Kui Zhu, Jian‐Guo Ma   +3 more
openaire   +1 more source

Dual-band transmittance defogging model

Applied Optics
The fusion of shortwave infrared (SWIR) and visible light has emerged in recent years as an effective technique for image defogging. However, in some dense fog scenes, even this fusion method does not achieve significant defogging effects. Some researchers have attempted to apply atmospheric scattering models for defogging fusion images; overlooked is ...
Jin Duan, Peiren Guo, Suxin Mo, Jialin Wang, Xu Yang, Xinming Zang, Wenbo Zhu   +6 more
openaire   +2 more sources

On-body transmission for dual-band antenna incorporated with dual-band AMC waveguide jacket

2017 International Symposium on Antennas and Propagation (ISAP), 2017
In this paper, the different antenna orientation is investigated for on-body transmission by introducing the Dual-band Artificial Magnetic Conductor (AMC) waveguide jacket. The transmission for on-body is measured using two flexible dual-band antennas attach to the Dual-band AMC waveguide jacket.
M. A. Abdullah, M. K. A. Rahim, N.A. Samsuri, Osman Ayop   +3 more
openaire   +1 more source

Design of a Dual Band Gan Pa Utilizing Dual Band Impedance Transformers

This thesis discusses the design, fabrication, and testing of a high efficiency, dual band radio frequency power amplifier. While it is difficult to demonstrate an exact mode of operation for power amplifiers at radio frequencies, based on the characteristics of the transistor itself, the argument can be made that our high efficiency performance is due
openaire   +1 more source

Novel Dual-Band Metascreen for Dual-Band Near-Field Phase Correction

IEEE Transactions on Antennas and Propagation, 2023
Foez Ahmed, Muhammad U. Afzal, Dushmantha N. Thalakotuna, Karu P. Esselle   +3 more
openaire   +1 more source

Dual-band ends-fed dipole-like driver for dual-band antenna arrays

Radioengineering
The article addresses the problem of dual-band structure designs based on the quasi-Yagi arrangements. The reported dual-band dipole antenna comprises the out-of-phase power divider, whose outputs excite the corresponding dipole arms to produce appropriate surface current distribution on them.
S.A. Alekseytsev, Yu.N. Parshin
openaire   +1 more source