Results 91 to 100 of about 4,662 (208)

A Tunable Single-Feed Triple-Band LTE Antenna With Harmonic Suppression

IEEE Access, 2019
This paper presents a single-feed planar inverted-F antenna (PIFA) that operates at three resonant frequencies within the LTE frequency range which would result in the enhancement of the antenna bandwidth and the increase of the data-rate speed.
Abdullah J. Alazemi, Gabriel M. Rebeiz
doaj   +1 more source

Submillimeter satellite radiometer first semiannual engineering progress report [PDF]

Development of 560 GHz fourth harmonic mixer and 140 GHz third harmonic generator for use in ...
Bauer, R. J., Cohn, M., Cotton, J. M., Jr., Dozier, J. W., Packard, R. F., Rodgers, S. D.   +5 more
core   +1 more source

Low-distortion downconvertor using varactor diodes

Electronics Letters, 1978
A balanced varactor downconvertor for a 6.8 GHz input signal is described. Measured intermodulation and conversion performance are given. Compared to Schottky-diode mixers this downconvertor has a considerably higher 3rd-order intercept point.
openaire   +1 more source

Second-Harmonic Generation and Spectrum Modulation by Active Nonlinear Metamaterial

, 2009
The nonlinear properties of a metamaterial sample composed of double-layer metallic patterns and voltage controllable diodes are experimentally investigated.
Chen, Hongsheng, Huangfu, Jiangtao, Jiang, Tao, Luo, Yu, Peng, Liang, Ran, Lixin, Wang, Dongxing, Wang, Zhiyu   +7 more
core   +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

Phase modulator Patent [PDF]

, 1971
Phase modulator with tuned variable length electrical lines including coupling and varactor diode ...
Brown, K. H., Fitting, R. C.
core   +1 more source

Electrolyte gate dependent high-frequency measurement of graphene field-effect transistor for sensing applications

, 2014
We performed radiofrequency (RF) reflectometry measurements at 2.4 GHz on electrolyte-gated graphene field-effect transistors (GFETs) utilizing a tunable stub-matching circuit for impedance matching.
Abbassi, M. El, Calame, M., Fu, W., Hasler, T., Hellmüller, S., Ihn, T., Jung, M., Puebla-Hellmann, G., Schönenberger, C., Steinacher, M., Wallraff, A.   +10 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  

Circulator having quarter wavelength resonant post and parametric amplifier circuits utilizing the same Patent [PDF]

, 1967
Development of electromagnetic wave transmission line circulator and application to parametric amplifier ...
Clauss, R. C.
core   +1 more source