Results 81 to 90 of about 4,766 (228)

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

Tunable transmission and harmonic generation in nonlinear metamaterials

, 2008
We study the properties of a tunable nonlinear metamaterial operating at microwave frequencies. We fabricate the nonlinear metamaterial composed of double split-ring resonators and wires where a varactor diode is introduced into each resonator so that ...
Alexander B. Kozyrev, Daniel W. van der Weide, Ilya V. Shadrivov, Shadrivov I. V., Yuri S. Kivshar   +4 more
core   +1 more source

Method and apparatus for measuring distance [PDF]

, 1988
The invention employs a continuous wave radar technique and apparatus which can be used as a distance measuring system in the presence of background clutter by utilizing small passive transponders.
Kobayashi, Herbert S., Lichtenberg, Christopher L., Shores, Paul W.   +2 more
core   +1 more source

A frequency reconfigurable multiband patch antenna for wireless applications [PDF]

, 2010
Copyright @ 2011 ...
AbuTarboush, HF, Al-Raweshidy, H, Budimir, D, Nasr, KM, Nilavalan, R   +4 more
core  

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

Low frequency modulator design using single varactor diode as switching ...
Summer, H. M.
core   +1 more source

Varactor-Based Tunable Sensor for Dielectric Measurements of Solid and Liquid Materials

Journal of Sensor and Actuator Networks
In 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, Weidong Hu, Qasim Ali, Ali Raza Barket, Gulab Shah   +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, J. Rodriguez, I. Otung, W. Mshwat, R. Abd-Alhameed   +4 more
doaj  

Varactor diodes for millimeter and submillimeter wavelengths [PDF]

Whisker-contacted GaAs Schottky barrier varactor diodes are the most common high-frequency multiplier element in use today. They are inherently simple devices that have very high frequency response and have been used to supply local oscillator power for ...
Crowe, Thomas W., Dossal, Hasan, Hesler, Jeffrey L., Rizzi, Brian J.   +3 more
core   +1 more source

Photoresponse of area-variable varactor diode

Electronics Letters, 1996
Photoresponses and microwave characteristics of an area-variable varactor diode are investigated in the frequency range up to 7 GHz. It is demonstrated that the on/off ratio of its capacitance corresponds to 18.5 at 1 GHz. The capacitance is also significantly altered by photoillumination, and a maximum on/off ratio of 450% is achieved at 1 GHz with ...
null Kim, null Kwon, null Hong
openaire   +1 more source

Monolithic millimeter-wave diode grid frequency multiplier arrays [PDF]

Monolithic diode frequency multiplier arrays, including barrier-N-N(+) (BNN) doubler, multi-quantum-barrier-varactor (MQBV) tripler, Schottky-quantum-barrier-varactor (SQBV) tripler, and resonant-tunneling-diode (RTD) tripler arrays, have been ...
Chung, E., Domier, C. W., Liu, Hong-Xia L., Luhmann, N. C., Jr., Qin, X.-H., Sjogren, L. B., Wu, W.   +6 more
core   +1 more source