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Saturday, July 18, 2020 | History

1 edition of Waveguide testing with nonosecond R-F voltage pulses found in the catalog.

Waveguide testing with nonosecond R-F voltage pulses

by William Carl Schmidt

  • 245 Want to read
  • 31 Currently reading

Published by Naval Postgraduate School in Monterey, California .
Written in English


ID Numbers
Open LibraryOL25129475M

In radio-frequency engineering and communications engineering, waveguide is a hollow metal pipe used to carry radio waves. This type of waveguide is used as a transmission line mostly at microwave frequencies, for such purposes as connecting microwave transmitters and receivers to their antennas, in equipment such as microwave ovens, radar sets, satellite communications, and microwave radio links. The electromagnetic waves in a waveguide . R T= ns Refer to the figure on the right showing the wave voltage pulses on a transmission line around position "x=0" where the internal impedance of the line changes from R, to R2. Assume that the horizontal axis (x axis) has units of meters, the time units are nanoseconds and the vertical axis has units of volts.

  Near the lower cutoff, the group delay gets longer and longer, as the EM wave ping-pongs down the guide, and can easily be 10X the free-space group delay. But at the upper end of a waveguide's band, the group delay approaches the free-space group delay, which follows the rule-of-thumb, approximately one foot per nanosecond, independent of. The pulse peak voltage and current are approximately 9 kV and 40 A, respectively, with the voltage pulse width of about 50 ns. At the test section pressure and temperature of P = atm and T = K, the peak reduced electric field in the plasma is E / N ∼ 40 × 10 −16 V cm by:

RF / Microwave - Reading List RF Design Engineers – • Microstrip Lines and Slotlines – Gupta, Garg, Bahl and Bhartia. Artech House Publishers () – ISBN X • RF Circuit Design – Chris Bowick. Newnes Publishing () – ISBN • Introduction to Radio Frequency Design – Wes Hayward. The. A single data set from the center of the test matrix shows compression wave strength increases as voltage to the power and energy to the power in the range surveyed. Characterization of nanosecond pulse driven dielectric barrier discharge plasma actuators for aerodynamic flow control. / Characterization of nanosecond pulse Cited by: 3.


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Waveguide testing with nonosecond R-F voltage pulses by William Carl Schmidt Download PDF EPUB FB2

Resultant r-f voltage pulses were used to drive a waveguide system and reflections from waveguide obstructions were viewed on a high-speed sampling oscilloscope. The location and reflection coefficients of obstructions were then obtained from measurements taken on the oscilloscope face.

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Waveguide testing with nanosecond R-F voltage pulses. By William Carl Schmidt Download PDF (2 MB)Author: William Carl Schmidt. Here, short and fast rising high voltage pulses (PN, 'sub-nanosecond') produced uniform plasma (chi-square p-value above ) when the applied electric field was above ~– kV cm −1; while for longer and slower rising pulses (NM, 'nanosecond') treshold applied electric field was around ~– kV cm −1.

These applied electric field values separate uniform streamer and Author: Chong Liu, Alexander Fridman, Danil Dobrynin. An alternative, first investigated by Roupassov et al.

[10][11][12] is to supply the asymmetric single dielectric barrier discharge actuators with nanosecond high voltage DC pulses with pulse. A variable power Nd:YAG laser with a maximum mJ at nm, 10 ns FWHM output pulse is used in conjunction with an applied high voltage pulse to trigger the microwave switch.

The 3-fold structure couples a TE travelling wave with a near cut-off TE wave producing a region far from cut-off with a large change in group velocity as a function of frequency.

A metre long copper helical waveguide was used to compress a 80 ns, kW frequency-swept pulse from a high power TWT (TMD PTC), driven by an Cited by: 1. Another familiar waveguide is a part of TV and Internet-access satellite dish antennas.

A conventional dish antenna and the low-noise block used to down-convert the frequencies it receives. A waveguide is needed to convey the microwave frequencies used in transponder-to-dish transmission. TN #1 High Voltage Nanosecond Pulse Measurement Techniques 3 Introduction.

The EHT nanosecond pulser series of power supplies generate pulses that are both high in voltage, up to 40 kV, and have fast rise times, as short as 10 ns.

The measurement of these kindsFile Size: KB. Keysight Technologies - Audix Selects Keysight’s 5G Solutions to Ensure Safe RF and Microwave Emissions - ; Qualcomm - Qualcomm Introduces New 6 GHz Wi-Fi 6E and Bluetooth Portfolio - ; Rohde & Schwarz - Finnish T&M Expert Selects R&S Plane Wave Converter for 5G-NR OTA Base Station Testing - Etekcity Digital Multimeter, Voltage Tester Volt Ohm Amp Meter with Continuity, Diode and Resistance Test, Dual Fused for Anti-Burn, Red, MSR-R by Etekcity $ $ 37 $ AOne-NanosecondX-BandRadio-Frequency PulseGeneratorUsingaGunnDiodeOscillator andAvalancheTransistorModulator by WilliamHughHassinger Lieutenant,UnitedStatesNavy B.S.

The EHT nanosecond pulser technology is capable of producing high voltage (up to 60 kV) pulses (width ns) with fast rise times (; 20 ns) at high pulse repetition frequency (adjustable up to kHz) for CW operation.

EHT nanosecond pulsers allow the user to independently control the output voltage, pulse width, and pulse repetition. The experimental setup utilized to observe fast switching dynamics is shown in figure 1(a), where a memristor is connected in series with a fast pulse generator and a single-shot 20 GHz bandwidth Lecroy oscilloscope.

The fast scope monitors not only the transmitted voltage V trans through the device but also the incident voltage V inc from the pulse generator and the reflected voltage V Cited by: the wave phase velocity, there is equal to c/n (where c is the speed of light).

So, in media with n>1, the waves propagate slowly (slow waves) and, hence, electrons can move faster than the wave: In such a case the electrons can be decelerated by the wave, which means that electrons will transfer a part of their energy to the wave. repetitive high-voltage pulses that are free from overshoot and ringing.

The width of the pulses is adjustable from 75 ns to 10 ms with the fall times of a few tens of nanoseconds for a negative wave and a repetition period of s with the existing setup. By up-grading to a more complex driver circuit, much lower pulsewidths are by: Bench pulse generators.

Simple bench pulse generators usually allow control of the pulse repetition rate (), pulse width, delay with respect to an internal or external trigger and the high- and low-voltage levels of the -sophisticated pulse generators may allow control over the rise time and fall time of the pulses.

Pulse generators are available for generating output pulses having. POMR book ISBN Ma 22 22 CHAPTER 1 Introduction and Radar Overview FIGURE Pulsed radar range ambiguity. Time Pulse #1 Target A, Pulse #1 Pulse #2 Target A, Pulse #2Target B, Pulse #1 Pulse #3 Target A, Pulse #3Target B, Pulse #2 Pulse #4 Target A, Pulse #4Target B, Pulse #3File Size: KB.

Waveguides from Fairview Microwave consist of coaxial adapters, bandpass filters, bends, flexible waveguide cables, waveguide gain horns, sections and terminations. Fairview waveguides are available in standard sizes from WR through WR depending on type of waveguide product, which encompasses frequencies from GHz to 75 GHz.

The high voltage pulse generators from our own development provide a pulse power sourse for the withstand pulse voltage test of such electronic component parts. The generators can generate square wave pulses with arbitrary pulse width and vary continuously the frequency in the wide range from the commercial frequency to a high frequency.

The 20 dB coupler and power meter in the set-up are used to calibrate the detector output voltage. Remember that since you are using a square-wave, the peak power is three dB higher than the average power reading.

Coming soon? Coherent versus non-coherent RF pulses--what does this mean?Best Sellers in Function Generators #1. DC V to kV High Voltage Pulse Generator Inverter Super Arc Pulse Ignition High Temperature Arc Igniter Module HiLetgo DDS AD Signal Generator Module MHz Sine Wave and 2 Square Wave Output IC Test Equipment out of 5 stars Click to see a high resolution image: PWG™ Sensor.

TROY, MI Janu – Littelfuse®, Inc., has developed a unique contactless position measurement technique based on the measurement of flight of time (FOT), the Pulsed WaveGuide™ (PWG™) sensor. This sensor is particularly useful for non-conventional shaped tanks because its continuous level sensing allows for exact measurements.