Results 21 to 30 of about 1,302 (222)

Design and characterization of SiC varactor-based phase shifters [PDF]

, 2012
Design and realization of two continuously tunable phase shifters for 1.4 GHz band is presented. Both circuits are based on SiC varactors, conceived to enable high-voltage, high-power operation, and suitable for application in the transmitter chain of ...
Andersson, Christer, Fager, Christian, Andersson, C.M., V. Camarchia, Fager, C., R. Quaglia, D. Kuylenstierna, Fagery, C., Camarchia, Victor,, Kuylenstierna, Dan,, Kuylenstierna, Dan, Pirola, Marco,, Pirola, Marco, Kuylenstierna, D., Andersson, Christer,, C. Fager, Fagery, C.,, Quaglia, Roberto, Camarchia, Vittorio, Quaglia, Roberto,, M. Pirola, C. M. Andersson, Camarchia, Victor   +22 more
core   +1 more source

Reconfigurable Mach–Zehnder interferometer for dynamic modulations of spoof surface plasmon polaritons

Nanophotonics, 2021
We propose an ultrathin reconfigurable Mach–Zehnder interferometer (MZI) for realizing dynamic frequency and amplitude modulations of spoof surface plasmon (SSP) signal.
Cui Wen Yi, Zhang Jingjing, Gao Xinxin, Cui Tie Jun   +3 more
doaj   +1 more source

Tuning Patch-Form FSS [PDF]

, 2010
The application of a novel biasing technique to tune frequency selective surfaces (FSS) made of patch elements is described. The methodology follows a recently developed technique where the biasing circuit of an active FSS is etched at the rear of a ...
Parker, Edward A., Robertson, J.-B., Sanz-Izquierdo, Benito, Batchelor, John C.   +3 more
core   +1 more source

Generation of Mode-Reconfigurable and Frequency-Adjustable OAM Beams Using Dynamic Reflective Metasurface

IEEE Access, 2020
Recently, much attention has been paid to beams carrying orbital angular momentum (OAM) for radio communication, which faces a great challenge of dynamic generation of OAM with different topological charges.
Kai Guo, Qun Zheng, Zhiping Yin, Zhongyi Guo   +3 more
doaj   +1 more source

An Electronically-Tunable, Flexible, and Transparent Antenna With Unidirectional Radiation Pattern

IEEE Access, 2021
In this paper, a frequency reconfigurable, conformal, durable, optically transparent, and unidirectional antenna design is demonstrated for the first time.
Abu Sadat Md. Sayem, Roy B. V. B. Simorangkir, Karu P. Esselle, Dushmantha N. Thalakotuna, Ali Lalbakhsh   +4 more
doaj   +1 more source

Microstrip Tunable Bandpass Filter with the Colinear Resonators

International Journal of Antennas and Propagation, 2013
This paper presents the lumped element circuit and transmission line equivalent circuit for a varactor-tuned bandpass filter. The filter consists of transmission lines, fixed capacitors, and a varactor diode.
Z. P. Wang, P. S. Hall, J. Kelly, P. Gardner   +3 more
doaj   +1 more source

Dynamic Metasurface Reflectors Based on Coupled Resonators for Simultaneous Magnitude and Phase Control

IEEE Access, 2023
A novel metasurface reflector unit cell based on two coupled resonators is proposed and demonstrated for real-time reconfigurable beamforming in the X-band (8-12 GHz). The unit cell is composed of a split-ring resonator (SRR) with tunable capacitance and
Mohamed K. Emara, Debidas Kundu, Keigan Macdonell, Leandro M. Rufail, Shulabh Gupta   +4 more
doaj   +1 more source

Independently Tunable Concurrent Dual-Band VCO Using Square Open-Loop Resonator

IEEE Access, 2018
A concurrent dual-band voltage-controlled oscillator (VCO) with independently tunable dual oscillation frequencies is proposed. A shared square open-loop dual-mode resonator and two varactor diodes are the basic units offering flexible tuning for the ...
Boqiong Li, Yongle Wu, Cuiping Yu, Yuanan Liu   +3 more
doaj   +1 more source

Dual Polarized Reconfigurable Frequency Selective Surfaces [PDF]

, 2013
Novel band-stop active frequency selective surfaces (FSS) capable of modifying their response for different polarizations are proposed. Geometries based on full rings, and split rings are employed.
Sanz-Izquierdo, B., Parker, E.A.
core   +1 more source

Heterostructure Barrier Varactor Multipliers [PDF]

, 2000
The Heterostructure Barrier Varactor (HBV) diode and its application in frequency multipliers is reviewed. Different material systems and HBV models are described.
Ingvarson, Mattias,, Stake, Jan,, Dillner, Lars,, Kollberg, Erik,   +3 more
core   +2 more sources