Results 81 to 90 of about 1,302 (222)
Varactor diode assembly with low parasitic reactances
, 1975 Development of varactor diode assembly overcomes parasitic reactances of conventional varactor packages. In specially constructed assembly very high idler-frequency to signal-frequency ratios are used to obtain low-noise operation over maximum ...
Dickens, L. E.
core
K-Band Varactor Diode-Tuned Elliptical Slot Antenna for Wideband Imaging
, 2011 Small resonant elliptical slot antennas have shown great potential as imaging array elements at microwave frequencies. For high-resolution 3D imaging applications it is desirable to extend the operational frequency bandwidth of these elements. One way to
Ghasr, Mohammad T. +10 more
core +1 more source
Planar Inverted-F Antennas (PIFA) for multiband wireless applications
, 2010 This is a post-print version of the article - Copyright @ 2010 IEEEA compact reconfigurable four bands Planar Inverted-F Antenna (PIFA) is presented for Digital Video Broadcasting – Handheld (DVB-H), Universal Mobile Telecommunications System (UMTS ...
AbuTarboush, HF, Nilavalan, R, Peter, T
core
, 2018 A novel reconfigurable equal to unequal Wilkinson power divider is presented. The proposed power divider adopts coupled microstrip line technique to implement a high impedance section to have unequal output power ratio. A varactor diode is placed between
R.A. Abd-Alhameed +13 more
core +1 more source
Broadband Dual Varactor Diode-Loaded Elliptical Slot Antenna with an Orthogonal Feed at K-Band
, 2013 An orthogonally-fed, small elliptical slot antenna loaded by a varactor diode, and operating in K-band frequency range (18 - 26.5 GHz), is designed for use in synthetic aperture radar imaging arrays.
M. Baumgartner +5 more
core +1 more source
Device for diode tuning in a stripline varactor harmonic multiplier
, 1969 Stripline varactor harmonic multiplier uses a device for positioning the varactor diode with respect to the stripline circuit to obtain series resonance.
Steele, K. P.
core
, 2016 Equations are derived for a parametric chaos generator containing three oscillatory circuits and a variable-capacitance diode (varactor) and are reduced to equations for slow amplitudes of parametrically interacting modes.
Kuznetsov, Sergey P.
core +1 more source
Elastance coefficients of varactor diodes
Electronics Letters, 1965 The elastance coefficients of a diode are derived for inclusion in standard varactor theory.
openaire +1 more source
Varactor-Based Tunable Sensor for Dielectric Measurements of Solid and Liquid Materials
Journal of Sensor and Actuator NetworksIn this article, a tunable RF sensor is presented for the measurement of dielectric materials (liquids and solids) based on a metamaterial resonator. The proposed novel configuration sensor has a microstrip line-loaded metamaterial resonator with tunable
Waseem Shahzad +4 more
doaj +1 more source
Slotted Printed Monopole UWB Antennas with Tunable Rejection Bands for WLAN/WiMAX and X-Band Coexistence [PDF]
Radioengineering, 2018 Four versions of the compact hexagonal-shaped monopole printed antennas for UWB applications are presented. The first proposed antenna has an impedance bandwidth of 127.48 % (3.1 GHz to 14 GHz), which satisfies the bandwidth for ultra-wideband ...
I. Elfergani +4 more
doaj