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A novel slow wave structure with low work voltage, high work current, compact structure was proposed by using radial spiral waveguide. The dispersion and transmission character was analyzed by computer simulation, and its work voltage was obtained, which could be as low as several hundred Volts. As the emitter face of cylinder gun larger than ordinary TWT's, it is possible to produce a high current...
Conference proceedings front matter may contain various advertisements, welcome messages, committee or program information, and other miscellaneous conference information. This may in some cases also include the cover art, table of contents, copyright statements, title-page or half title-pages, blank pages, venue maps or other general information relating to the conference that was part of the original...
Study on U-shaped microstrip meander-line slow-wave structure for a low voltage, wide bandwidth millimeter traveling-wave tube is presented. The electromagnetic characteristics and the sheet beam-wave interaction of this structure are carried out. The simulation results predicts that this millimeter-wave power amplifier is capable of delivering hundreds of watts output power in the frequency range...
The 2012 International Conference on Microwave and Millimeter Wave Technologies (ICMMT2012) is the eighth of a consecutive series initiated in 1998 to be held in China every other year. ICMMT2012 will provide a broader forum for worldwide scientists and engineers of varied backgrounds to exchange information and share research results to discuss collaborations in the fields of microwave, millimeter...
In this paper, a monolithic V-band low noise amplifier (LNA) is presented by using 0.15μm gate length GaAs/InGaAs/AlGaAs pseudomorphic HEMT technology. The LNA is consisted by 4 stages 4×30μm gate width transistors. The total circuit achieves 2.2–2.7 dB noise figure with more than 16dB associate gain from 57GHz to 66GHz, and the saturation output power reaches 15dBm. The chip area is 2.1mm×1.5mm.
This paper reports on the design and experiment of an broadband power sensor based on zero-biase diodes. High performance was achieved across the entire frequency band from 0.01GHz to 50GHz. Emphasis is on the design of the matching circuits using a new method. Other details during the realization of the microwave end such as the choice of diodes and the design of a high precision attenuator are also...
The electron beam interaction in a novel slow-wave structure called dielectric-lined azimuthally periodic circular waveguide (DLAP-CW) is studied in Ka-band frame, which is a modified form of a conventional dielectric-lined circular waveguide (DL-CW). And the DLAP-CW has large beam aperture, good dispersion characteristics and easy fabrication. In this paper, the capability of beam-wave interaction...
In this paper, a millimeter-wave predistortion linearizer to satisfy linearization requirements of the traveling wave tube amplifiers (TWTAs) is proposed. By controlling the DC bias of the Schottky diode, the linearizer is capable of providing different combinations of the amplitude and phase characteristics for the TWTAs. The simulation results show 7.2dB gain compensation and 42° phase compensation...
A compact Ultra-wideband (UWB) slot antenna with dual band-notched characteristics is proposed. The antenna has a compact size of 22 mm×15 mm and wide operating bandwidth of 110% (3.2∼10.6 GHz). By etching an L-shaped quarter-wavelength open-ended slot and two half-wavelength short-ended ring slots on the ground, a UWB antenna with dual notched band characteristics is achieved. Selectivity of the...
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