Scientific and Technical Aerospace Reports Volume 38 July 28, 2000
Scientific and Technical Aerospace Reports Volume 38 July 28, 2000
Scientific and Technical Aerospace Reports Volume 38 July 28, 2000
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<strong>and</strong> driving frequency. It was demonstrated that by incorporating the variation of capacitance <strong>and</strong> power loss with voltage <strong>and</strong><br />
frequency, satisfactory estimates of power requirements can be obtained. These relations allow general guidelines in selection <strong>and</strong><br />
application of piezoelectric actuators <strong>and</strong> driving electronics for active control applications.<br />
DTIC<br />
Piezoelectricity; Piezoelectric Ceramics; Actuators; Wafers<br />
<strong>2000</strong>0065669 Oxley Research, Inc., New Haven, CT USA<br />
Electrolytic regeneration of acid cupric chloride printed circuit board etchant Final Report, 1 Aug. 1995 - 31 Oct. 1996<br />
Oxley, J. E.; Smialek, R. J.; Apr. 18, 1997; 33p; In English<br />
Report No.(s): DE97-008020; DOE/EE/15650-T6; No Copyright; Avail: Department of Energy Information Bridge<br />
The overall objective of this ERIP program was to make substantial progress in further developing a process for electrolytic<br />
regeneration of acid cupric chloride etchant. Specific objectives of the work were: (1) to define optimum system operating conditions<br />
by conducting a systematic study of process parameters, (2) to develop or find a superior electrolytic cell separator material,<br />
(3) to determine an optimum activation procedure for the flow-through carbon/graphite felt electrodes which are so critical to<br />
process performance, (4) to demonstrate - on the pre-prototype scale - electrolytic compensation for oxygen ingress - which causes<br />
etchant solution growth, <strong>and</strong> (5) to begin engineering design work on a prototype-scale regeneration unit. Parametric studies<br />
looked at the effect that key plating parameters have on copper deposit quality. Parameters tested included (a) velocity past the<br />
plating cathodes, (b) copper concentration in the catholyte solution from which the copper is being plated, (c) plating current density,<br />
<strong>and</strong> (d) catholyte cupric ion concentration. The most significant effects were obtained for velocity changes. The work showed<br />
that catholyte velocities above 0.5 ft/sec were needed to get adequate plating at 77.5 mA/sq cm <strong>and</strong> higher currents, <strong>and</strong> that even<br />
higher flow was better.<br />
NTIS<br />
Electrolytic Cells; Printed Circuits; Circuit Boards; Etchants<br />
<strong>2000</strong>0066591 Department of the Navy, Washington, DC USA<br />
Helix Antenna<br />
Josypenko, Michael J., Inventor; Jul. 19, 1999; 22p; In English<br />
Patent Info.: Filed 19 Jul. 1999; US-Patent-Appl-SN-09,356,803<br />
Report No.(s): AD-D019712; No Copyright; Avail: Issuing Activity (Defense <strong>Technical</strong> Information Center (DTIC)), Microfiche<br />
A helix antenna includes a base portion for containing a feed network including a power input, a 90 degree power splitter<br />
in communication with the power inlet, <strong>and</strong> first <strong>and</strong> second 180 degree power splitters in communication with the 90 degree<br />
power splitter. A support tube is mounted on the base portion, <strong>and</strong> a plurality of disk separators are mounted on the tube. Four<br />
elongated elements are wound around the tube <strong>and</strong> are spaced therefrom by the disk separators. The elements are connected to<br />
end-most lower <strong>and</strong> upper ones of the disk separators, the elements extending toward a center feed point of the upper disk separator.<br />
First <strong>and</strong> second radially opposite pairs of feed cables are wound around the Support tube, extending from the lower disk separator<br />
to the upper disk separator, <strong>and</strong> are in communication, respectively, with the first <strong>and</strong> second 180 degree power splitters.<br />
DTIC<br />
Dipole Antennas; Antenna Design; Design Analysis<br />
<strong>2000</strong>0066612 Building <strong>and</strong> Construction Research TNO, Centre for Mechanical Engineering, Delft, Netherl<strong>and</strong>s<br />
Shock Test of a Switch Over Unit, Type DP 7J.:1 Manufacturer Imtech<br />
vanBragt, F. J., Building <strong>and</strong> Construction Research TNO, Netherl<strong>and</strong>s; Jul. 30, 1999; 24p; In English; Original contains color<br />
illustrations<br />
Contract(s)/Grant(s): A99/KM/102; TNO Proj. 006.931<strong>28</strong>/01.01<br />
Report No.(s): TD-99-0093; Rept-99-CMC-R041; Copyright; Avail: Issuing Activity<br />
Shock tests have been performed on a resiliently mounted switch over unit. The cabinet was mounted on wire rope mounts<br />
type K19 100-02 S2. No damage has been established <strong>and</strong> no contact rumble was observed.<br />
Author<br />
Shock Tests; Damage; Switches<br />
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