Results 1 to 10 of about 4,643 (189)
Investigation of coplanar waveguide fed SWB antenna with controllable stop band characteristics [PDF]
Scientific ReportsThis study presents a coplanar waveguide (CPW)-fed monopole antenna engineered for super-wideband (SWB) applications. The antenna is designed to resonate at frequencies ranging from 2.44 GHz to over 25 GHz. The prototype is built on an F4B substrate with
Ijaz Khan +10 more
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A One-Bit Programmable Multi-Functional Metasurface for Microwave Beam Shaping [PDF]
Micromachines, 2023 In this paper, we demonstrate a multi-functional metasurface for microwave beam-shaping application. The metasurface consists of an array of programmable unit cells, and each unit cell is integrated with one varactor diode. By turning the electrical bias
Wu Zhang +6 more
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Design of a continuously tunable reflectarray element for 5G metrology in the k-band [PDF]
Advances in Radio Science, 2020 We introduce a new tunable reflectarray element for an operation frequency of 26 GHz in the k-band. It is shown that a 340∘ continuous tunning range of the reflected wave can be accomplished by using an aperture-coupled patch antenna with only one
T. Harz, T. Kleine-Ostmann, T. Schrader
doaj +1 more source
Reconfigurable Filtenna using Varactor Diode for Wireless Applications
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2021 This paper presents a compact and planar reconfigurable filtenna for application in Wireless systems. The filtenna is composed of a UWB circular antenna and a filter with two trapezoidal resonators.
J. A. I. Araujo +7 more
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FREQUENCY MODULATION APPROACH BASED ON SPLIT-RING RESONATOR LOADED BY VARACTOR DIODE
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2020 In the paper, an approach to frequency modulation is presented using a split-ring resonator (SRR) loaded by a varactor diode. The modulation occurs due to the continuous time variation of capacitance of the varactor diode via changing of its bias voltage
Dmytro Vovchuk +3 more
doaj +1 more source
Dual-Layer Beamscanning Reflectarray Antenna Operating at Ku-Band
Journal of High-Frequency Communication Technologies, 2023 This paper presents a beam scanning electronically reconfigurable reflectarray configuration for Ku-band applications using a single varactor diode. A 15×15 center-fed reconfigurable reflectarray antenna is designed consisting of 225 octagonal shaped ...
Vidhyashree Suresh +2 more
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Realization of Direct Linear Relation Between Control Voltage and Resonance Frequency of the LC Voltage Controlled Oscillator [PDF]
Engineering and Technology Journal, 2018 The main problem of traditional LC ( L represents the inductance, and C represents the Capacitance) Voltage Controlled Oscillators VCOs, is the non-linearity relation between the tuning control voltage and output resonance frequency, which is caused by ...
Azzad Saeed
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Compact single‐varactor diode frequency‐reconfigurable microstrip patch antenna
IET Microwaves, Antennas & Propagation, 2021 A single‐varactor frequency‐reconfigurable microstrip patch antenna is presented. The antenna comprises a symmetrical arrangement of four metallised patches coupled and interconnected via slots and metallic bars, respectively.
Mahmoud Al Ahmad +3 more
doaj +1 more source
IEEE Access, 2021 Membrane reflectarray antennas with flexible support structures realize low weight and low stowage volume. However, deformation of the reflectarray membrane generally degrades antenna gain. We propose electrical misalignment compensation for 5.8-GHz-band
Keisuke Omoto +2 more
doaj +1 more source
LOW PASS AND QUAD BAND PASS TUNABLE FILTER BASED ON STUB RESONATOR TECHNIQUE [PDF]
Jordanian Journal of Computers and Information Technology, 2019 An electronically tunable multi-passband filter using one varactor diode is implemented based on transmission line stub method for passing several most favourable applications through multiple operating bands.
Yanal S. Faouri +3 more
doaj +1 more source