GaN 2DEG Varactor-Based Impulse Suppression Module for Protection Against Malicious Electromagnetic Interference
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Electronic Materials"
DOI: 10.1007/s11664-020-08110-0
Abstract: A GaN-based metal–semiconductor–metal varactor with a two-dimensional electron gas (2DEG) layer is proposed and fabricated. The capacitance variation of this fabricated varactor biased at different external voltages is studied and measured, and the frequency-dependent capacitance… read more here.
Keywords: module; malicious electromagnetic; electromagnetic interference; varactor ... See more keywords
Bandwidth-enhanced differential VCO and varactor-coupled quadrature VCO for mmWave applications
Sign Up to like & getrecommendations! Published in 2018 at "AEU - International Journal of Electronics and Communications"
DOI: 10.1016/j.aeue.2018.08.005
Abstract: Abstract This paper presents a bandwidth-enhanced differential LC-Voltage Controlled Oscillator (LC-VCO) and varactor-coupled Quadrature VCO (QVCO) designed and simulated in high-performance SiGe HBTs of the GlobalFoundries (GFs) 130 nm SiGe BiCMOS8HP process for mmWave applications. Using… read more here.
Keywords: enhanced differential; bandwidth enhanced; vco varactor; quadrature ... See more keywords
Device modeling of RF varactor diodes for adjustable microwave reflectivity in active frequency selective surfaces
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Physics D: Applied Physics"
DOI: 10.1088/1361-6463/ac0706
Abstract: At present, the design of absorbers with broadband electromagnetic absorption performance in the P/L band (0.3 ∼ 2 GHz) is a huge challenge. The frequency selective surface (FSS) loaded with active RF devices utilizes the… read more here.
Keywords: frequency selective; physics; varactor diode; varactor ... See more keywords
Dual-Layer Single-Varactor Driven Reflectarray Cell for Broad-Band Beam-Steering and Frequency Tunable Applications
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Access"
DOI: 10.1109/access.2018.2882093
Abstract: A dual-layer active reflectarray configuration is proposed for broad-band beam-steering and/or frequency-tunable applications. A unit cell composed by two stacked fixed-size rectangular patches, properly loaded with a single varactor diode, is designed to realize the… read more here.
Keywords: beam steering; frequency; reflectarray; dual layer ... See more keywords
A Widely Tunable Compact Bandpass Filter Based on a Switched Varactor-Tuned Resonator
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Access"
DOI: 10.1109/access.2019.2929746
Abstract: This paper presents a compact tunable bandpass filter (BPF) based on a switched varactor tuned resonator with a wide frequency-tuning range and a constant absolute bandwidth (ABW). The proposed switched varactors are adopted to overcome… read more here.
Keywords: switched varactor; based switched; varactor; bandpass filter ... See more keywords
Anti-Series Varactor Network With Improved Linearity Performances in the Presence of Inductive and Capacitive Parasitics
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Access"
DOI: 10.1109/access.2021.3069090
Abstract: This paper proposes a varactor-based circuit technique intended for amplitude and phase control, with improved linearity in the presence of parasitic capacitances and parasitic inductances. The mechanism causing linearity degradation in an anti-series varactor network… read more here.
Keywords: topology; varactor; improved linearity; anti series ... See more keywords
Broadband Frequency-Selective Rasorber With Varactor-Tunable Interabsorption Band Transmission Window
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Transactions on Antennas and Propagation"
DOI: 10.1109/tap.2019.2916739
Abstract: In this paper, we present a frequency-selective rasorber with tunable transmission window located within the absorption band. The rasorber maintains a low reflectivity, which is less than −10 dB in broadband during the tuning process.… read more here.
Keywords: varactor; selective rasorber; band; frequency selective ... See more keywords
Phase Shift Techniques for Improving Varactor-Less QVCO Based on Rotated-Phase-Tuning
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Circuits and Systems II: Express Briefs"
DOI: 10.1109/tcsii.2021.3090033
Abstract: This brief proposes and verifies a new phase shifter applied in the rotated phase tuning (RPT) technique in Ka-band. The flexible phase shift in the RPT technique is significant for avoiding the phase ambiguity issue… read more here.
Keywords: varactor; phase shift; phase; phase tuning ... See more keywords
A 10.23–15.7-GHz Varactor-Tuned Microstrip Bandpass Filter With Highly Flexible Reconfigurability
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Transactions on Microwave Theory and Techniques"
DOI: 10.1109/tmtt.2021.3098835
Abstract: This article demonstrates a 10.23–15.7-GHz varactor-tuned microstrip bandpass filter (BPF) with fully controllable center frequency, bandwidth, and transmission zeros. The concept of cascading a tunable low-pass unit together with a tunable high-pass unit is adopted… read more here.
Keywords: ghz varactor; tuned microstrip; microstrip bandpass; filter ... See more keywords
Electronically Reconfigurable Varactor-Loaded HMSIW Bandpass Filter
Sign Up to like & getrecommendations! Published in 2018 at "Frequenz"
DOI: 10.1515/freq-2016-0345
Abstract: Abstract A varactor-loaded half-mode substrate integrated waveguide (HMSIW) reconfigurable bandpass filter (BPF) is proposed in this paper. The proposed BPF is composed of complementary split-ring resonators (CSRRs) and varactors. Meanwhile, a nonmetalized via is employed… read more here.
Keywords: varactor loaded; filter; electronically reconfigurable; varactor ... See more keywords
Modeling the Resonant Behavior of Continuously Reconfigurable FSS Based on Four Arms Star Geometry
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Microwaves, Optoelectronics and Electromagnetic Applications"
DOI: 10.1590/2179-10742020v19i3930
Abstract: A modeling of the resonant behavior of a continuously reconfigurable FSS is described in this paper. The FSS is based on four arms star geometry and its reconfigurability is achieved by the use of varactors.… read more here.
Keywords: four arms; geometry; varactor; arms star ... See more keywords