Results 81 to 90 of about 142,661 (163)

An investigation of a varactor-diode modulator Technical report no. 3 [PDF]

, 1964
Low frequency modulator design using single varactor diode as switching ...
Summer, H. M.
core  

Tunable Band Notched UWB Antenna With Wide Tuning Range and Notch Bandwidth Controllability

IEEE Access
An ultra-wide band (UWB) antenna employing spoof surface plasmon polariton principles is introduced, offering tunable single- and dual-band rejection. Inserting slot resonators into the SSPP feed achieves band-notching.
Somia Sharma, Rajesh Kumar Singh, Chun-Hsing Li   +2 more
doaj   +1 more source

Investigation of coplanar waveguide fed SWB antenna with controllable stop band characteristics

Scientific Reports
This 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, Chaoyun Song, Habib Ullah, Xiaozhi Qi, Kuang Zhang, Salahuddin Khan, Yizhi Shao, Tao Gong, Mian Muhammad Kamal, Muhammad Sheraz, Teong Chee Chuah   +10 more
doaj   +1 more source

A New Two-Port MIMO Filtenna With Tunable Bandwidth and Center Frequency

IEEE Access
A new two-port MIMO filtenna with center frequency and bandwidth tunability is introduced by integrating a tunable filter into the feeding section of a monopole antenna.
Alper Turkeli, Ali Kursad Gorur, Yasemin Altuncu, Adnan Gorur   +3 more
doaj   +1 more source

A Wideband Subharmonic Image-Reject Mixer With a Fixed IF Using Schottky Diodes

IEEE Journal of Microwaves
This work presents a Schottky anti-parallel diode pair (APDP)-based wideband subharmonic image-rejecting mixer (SH-IRM) with high image rejection and port-to-port isolation.
Rijubrata Pal, Mrinal Kanti Mandal
doaj   +1 more source

Heterostructure Barrier Varactor Multipliers

, 1998
We describe the Heterostructure Barrier Varactor (HBV) diode and its application in frequency multipliers. Different varactor models are presented that easily can be used in large signal simulations.
Stake, Jan,, Dillner, Lars,, Kollberg, Erik,   +2 more
core   +1 more source

Comparison of Antennas Electrical Tuning Methods for Mobile Applications

Известия высших учебных заведений России: Радиоэлектроника, 2017
The various methods of antenna electrical tuning for mobile handsets working in several LTE frequency bands are described. The PIFA-type antenna containing high and low frequency branches is proposed.
A. D. Grigoriev, B. Djalilov
doaj  

Transition voltage of AlGaN/GaN heterostructure MSM varactor with two-dimensional electron gas

, 2017
It is not in principle clear which of the capacitors forming a varactor is responsible for the capacitance change at the transition voltage. We analyzed a theoretical case of transition voltage of the varactor formed by ideal Schottky diodes.
L. Chow, N.C. Chen, Osvald, J., Vanko, G., Chow, L., L.B. Chang, J. Osvald, Chen, N. C., G. Vanko, Chang, L. B.   +9 more
core   +1 more source

Design and Analysis of Frequency-Tunable Amplifiers using Varactor Diode Topologies

, 2011
The design of frequency-tunable amplifiers is investigated and the trade-off between linearity, efficiency and tunability is revealed. Several tunable amplifiers using various varactor diode topologies as tunable devices are designed by using load-pull ...
Nesimoglu, Tayfun, Tayfun Nesimoglu
core   +1 more source

Fabrication and characteristics of varactor diode for UHF TV tuner operated within ultra-low tuning voltage

, 2007
A varactor diode for a ultra-high-frequency (UHF) TV tuner that can be operated within 5V of tuning voltage (VT) is presented. The fabricated diode has a shallow junction with a heavily doped p++ region on a steep hyperabrupt n+ region.
Shon, Yeong Soo, Choi, S.-Y., Kim, H. S.
core   +1 more source