Results 221 to 230 of about 673,942 (267)

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
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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

Microwave Power Leveler for K Band

Review of Scientific Instruments, 1964
A device has been developed for regulating milliwatts of microwave power in the 24-kMc region. The power leveler has been shown to operate over the electronic sweep range of a K-band reflex klystron, and to regulate power to within ±0.5%.
Edgar A. Rinehart, Robert L. Legan
openaire   +1 more source

Silicon micromachined K-band filters

2012 International Conference on Computing, Electronics and Electrical Technologies (ICCEET), 2012
This paper describes a substrate integrated waveguide (SIW) based filter at K band frequency on silicon substrate. TMAH etching is used to form the via-holes for SIW cavities. Simulations and comparison of TMAH and Deep reactive ion etching (DRIE) etched cavity has been presented.
Sumit Kumar Khandelwal, Deepak Bansal, K J Rangra   +2 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