Results 181 to 190 of about 8,418,670 (218)

LIGA Cavity Resonator for K-Band Applications

2005 International Conference on MEMS,NANO and Smart Systems, 2006
A 2-mm deep microwave cavity resonator is proposed for UGA micro-fabrication. LIGA provides highly vertical and optically smooth sidewalls, leading to potentially high quality (Q) factor. Simulation using 3-D finite element method (FEM) shows an unloaded Q (Q/sub u/) very close to the theoretical calculation. Feasibility of obtaining such cavities with
Zhen Ma, David M. Klymyshyn, Sven Achenbach   +2 more
openaire   +1 more source

Optical Beamformer for K-band Smart Antenna Systems

Optical Fiber Communication Conference, 2018
Beam forming using a 4×1 phased array with an optical feed network for K-band smart antenna systems is presented. Up to 45 degree steering angles are achieved. Wireless transmission throughputs of up to 3 Gbit/s using 32-OFDM subcarriers are achieved for the attained steering angles.
Trinidad, A.M., Tessema, N., Cao, Z., van Zantvoort, J.H.C., Dubok, A., Al-Rawi, A.N.H., Tangdiongga, E., Smolders, A.B., Koonen, A.M.J.   +8 more
openaire   +2 more sources

Calibration of a K-Band Autocorrelation Radiometer

[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium, 2005
The following paper describes a K-Band Autocorrelation Radiometer called CORRAD. The purpose of CORRAD is to measure tropospheric water vapor. A description of the hardware is included. The calibration technique is described in detail.
P.W. Gaiser, W.C. Boncyk, C.T. Swift
openaire   +1 more source

Measurements of K-Band Antenna Patterns

IEEE Transactions on Broadcasting, 1982
Methods and results of on-board antenna pattern measurements of Medium-scale Broadcasting Satellite for Experimental Purpose (BSE) are described in this paper. The measurements were carried out by means of satellite attitude offsets about the pitch and roll axes.
Toshiaki Kozu, Hidetoshi Murakami, Katsuyoshi Arai, Ryo Mochizuki   +3 more
openaire   +1 more source

K band fibers for the 'OHANA project

SPIE Proceedings, 2004
The 'OHANA aims at demonstrating the potential of single-mode fibers to make large telescope arrays with kilometric baselines. In this respect, propagation in single-mode fibers is critical. Transmission needs to be excellent, differential dispersion needs to be cancelled and polarizations have to be matched.
Kotani, Takayuki, Perrin, Guy, Woillez, Julien M., Guerin, Jean, Mazé, Gwenaël   +4 more
openaire   +2 more sources

K-band Transferred Electron Oscillator

IETE Journal of Research, 1976
Transferred electron oscillator developed in K-band (18–26.5 GHz) is reported. Frequency and power characteristics of the oscillator are presented. It is observed that a mechanical frequency tunability of nearly 5 GHz with a minimum output power of 10 mW is obtained.
G. Raju, O. P. N. Calla
openaire   +1 more source

Microelectromechanical K-Band Switching Circuits

1999 29th European Microwave Conference, 1999
Two single-pole single-throw (SPST) K-band circuit designs incorporating low-loss microelectromechanical systems (MEMS) microwave shunt switches are reported. DC measurements indicate actuation voltages in the order of 20 V with an on-to-off capacitance ratio of 30.
Sergio P. Pacheco, Linda P. B. Katehi
openaire   +1 more source

Optically controlled K-band oscillator

IEEE International Digest on Microwave Symposium, 2002
PIN photodiodes play an important role in detection of modulated light in fiberoptic links, however, these devices are essentially junction devices, with bias-dependent capacitance very similar to those of varactor diodes. Particularly under proper biasing conditions, junction capacitance of these devices can be changed by light illumination.
R. Saedi, T. Berceli, A.S. Daryoush, P.R. Herczfeld   +3 more
openaire   +1 more source

A K Band Search for Starburst Supernovae

1994
We are conducting a search for supernovae in starbuist galaxies at the IRTF. The major difficulty is to reliably detect weak point sources in the presence of a bright and structured background. Our technique is to apply various spatial filters to images taken at different epochs and construct catalogs of objects.
Van Buren, D., Jarrett, T., Beichman, C.
openaire   +2 more sources

K-band circulators on semiconductor wafers

1996 IEEE MTT-S International Microwave Symposium Digest, 2002
We report on the development of K-band circulators operating at 20 and 35 GHz which have been monolithically integrated with both GaAs and epitaxial GaAs-on-Si wafers. They demonstrate the potential for a fully integrated T/R module application.
J.D. Adam, H. Buhay, M.R. Daniel, G.W. Eldridge, M.H. Hanes, R.L. Messham, T.J. Smith   +6 more
openaire   +1 more source