Parallel-fed c.w. Gunn oscillators cascaded in X band waveguide for higher microwave power

1968 ◽  
Vol 4 (10) ◽  
pp. 185-186 ◽  
Author(s):  
S. Boronski
Keyword(s):  
Microwave Power ◽  
X Band ◽  
Gunn Oscillators

X band Gunn oscillators triggered by baseband Gunn diodes

1970 ◽  
Vol 6 (4) ◽  
pp. 100
Author(s):  
W. Fallmann ◽  
H.L. Hartnagel ◽  
G.P. Srivastava
Keyword(s):  
Gunn Diodes ◽  
X Band ◽  
Gunn Oscillators

scholarly journals Optimal Design of an X-Band, Fully-Coaxial, Easily-Tunable Broadband Power Equalizer for a Microwave Power Module

Electronics ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 829
Author(s):  
Fabio Paolo Lo Gerfo ◽  
Patrizia Livreri
Keyword(s):  
High Power ◽  
Microwave Power ◽  
Sensitivity Analyses ◽  
Operating Frequency ◽  
Power Module ◽  
Insertion Depth ◽  
Large Power ◽  
Coaxial Cavity ◽  
X Band ◽  
Power Stage

A microwave power module (MPM), which is a hybrid combination of a solid-state power amplifier (SSPA) as a driver and a traveling-wave tube amplifier (TWT) as the final high power stage, is a high-power device largely used for radar applications. A gain equalizer is often required to flatten the TWT output power gain owing to its big gain fluctuations over the operating frequency range. In this paper, the design of an X-band, fully-coaxial, easily-tunable broadband power equalizer for an MPM is presented. The structure is composed of a coaxial waveguide as the main transmission line and a coaxial cavity loaded with absorbing material as a resonant unit. Sensitivity analyses of the attenuation amplitude and resonant frequency of the equalizer in terms of coaxial cavity length, thickness of the absorbing disc, and insertion depth of the probe were carried out. The measured results were in good agreement with the simulated ones, showing that the equalization curve met the requirements well and proved that this optimal structure has the advantages of a large power capacity, a wide operating frequency band, is easily tunable, and good transmission performance.

X-band circularly polarized rectennas for microwave power transmission applications

2008 ◽  
Vol 25 (3) ◽  
pp. 389-393 ◽  
Author(s):  
Xuexia Yang ◽  
Junshu Xu ◽  
Deming Xu ◽  
Changlong Xu
Keyword(s):  
Microwave Power ◽  
Power Transmission ◽  
Circularly Polarized ◽  
X Band

scholarly journals Preliminary operational aspects of microwave-powered airship drone

2019 ◽  
Vol 11 ◽  
pp. 175682931986136 ◽  
Author(s):  
Kyo D Song ◽  
Jaehwan Kim ◽  
Jung W Kim ◽  
Yeonjoon Park ◽  
Jay J Ely ◽  
...  
Keyword(s):  
Microwave Power ◽  
Large Scale ◽  
Research Work ◽  
X Band ◽  
Federal Highway ◽  
Electrical Propulsion ◽  
Cargo Transportation ◽  
Langley Research Center ◽  
Intensity Radiation ◽  
Operational Aspects

This paper reports the development of an experimental airship drone powered by microwave as a precursor toward a large-scale airship drone for cargo transportation in mind under the collaboration with U.S. Federal Highway Administration and universities. Research work on a 2.2-m long airship drone powered by X-band microwave has provided sufficient data for the design and analysis for the operation of airship drone. A block of 16 rectenna array sheets of X-band was placed on each side of the airship drone (total 32 sheets) to collect and convert microwave power into direct current power for running the electrical propulsion system. The demonstration of the airship drone operation, powered only by microwave, was successfully performed inside the High Intensity Radiation Facility chamber located at NASA Langley Research Center. The data show the feasibility of practical use of microwave power for a transportation airship drone.

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