Issue 10 Volume 41 May 16, 2003

We have demonstrated a new sub-threshold MESFET architecture that we are calling a Schottky Junction Transistor
(SJT). It requires no gate dielectric making it more radiation tolerant and easier to scale than a MOSFET. An input gate current
IG controls a much larger channel current ID via a current gain, beta greater than 1. The operating mode resembles that of
a bipolar junction transistor but the SJT is a majority carrier device. Data from prototype 2 micron devices agree well with
numerical simulations. When extended to the deep sub-micron regime cut-off frequencies significantly higher than that
expected from the ITRS Roadmap are predicted. We have developed an electron beam lithography process for 0.1 micron gate
length SJTs. Results from these devices will be used to calibrate the numerical models before moving to sub-100 nm devices
DTIC
Field Effect Transistors; Low Frequencies
20030033016 California Univ., Davis, CA
Moderate-Perveance Cusp Electron Gun for High-Efficiency Harmonic Peniotrons
Luhmann, Neville C., Jr.; March 31, 2002; 13 pp.; In English
Contract(s)/Grant(s): F49620-01-1-0220; AF Proj. 3484
Report No.(s): AD-A410634; AFRL-SR-AR-TR-02-0452; No Copyright; Avail: CASI; A03, Hardcopy
Two (2) moderate perveance cusp electron guns have been purchased from Northrup-Grumman Corporation for a total
of $164,726.50. Both of these guns will be used in UCD research programs under the Vacuum Electronics MURI.
DTIC
Electron Guns; Harmonic Generations
20030033061 Pontificia Univ. Nacional Catolica del Peru, Lima, Peru
Flow Gas Transducer in Basis of a Hot Wire with a Nickel-Titanium Alloy its Flow Calibration System
Mugruza Vassallo, Carlos A.; October 25, 2001; 5 pp.; In English; Original contains color illustrations
Report No.(s): AD-A410551; No Copyright; Avail: CASI; A01, Hardcopy
In our Latin American countries, people have rarely developed about medical control systems based in sensors
(transducers) and actuator done in our environment. This has motivated the present work. In medical applications such as
breathing systems the hot wire flow sensors are being used actually. Taking advantage of the sensor thermal convection, we
can achieve a rapid operation using a smaller than 250 ms sampling time. This study was made based in stuff such as Nicrom
(100 um), Nickel-Titanium alloy (37 and 100 um) and Platinum (21 um), that use the ‘King’s Law’ that relates Thermal
Convection with Electrical Power; this law may detect flow changes through voltage changes when the temperature is
constant; showing successfully an alternative of flow sensing in any given conditions. The flow calibration system used in this
work is based in the principle of the RC discharge, using the constant compliance of a rigid water column, where the pressure
gets a lineal shape with a pressure step source and a 450 us sampling time for this two signals: flow and pressure.
DTIC
Actuators; Nickel Alloys; Titanium Alloys; Gas Flow; Transducers; Calibrating; Wire
20030033062 Chiba Univ., Chiba
Minimally Invasive Thermal Therapy for Cancer Treatment by Using Thin Coaxial Antennas
Ito, K.; Saito, K.; Taniguchi, T.; Okabe, S.; Yoshimura, H.; Oct 2001; 5 pp.; In English; Original contains color illustrations
Report No.(s): AD-A410552; No Copyright; Avail: CASI; A01, Hardcopy
In recent years, various types of applications of electromagnetic techniques for microwave thermal therapy have been
developed. Among them, minimally invasive microwave thermal therapies for cancer are of great interest. They are interstitial
microwave hyperthermia and microwave coagulation therapy. In this paper, we describe the characteristics of thin coaxial
antennas for those therapies.
DTIC
Hyperthermia; Microwaves; Cancer; Radiation Therapy
20030033092 Paul Scherrer Inst., Villigen, Switzerland
Bio-Functionalized Neurochips
Tiefenauer, L. X.; Sorribas, H.; Padeste, C.; Stricker, C.; October 25, 2001; 5 pp.; In English; Original contains color
illustrations
Report No.(s): AD-A410233; No Copyright; Avail: CASI; A01, Hardcopy
Arrays of gold microelectrodes have been generated on glass chips. Various adhesion molecules have then been covalently
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