Xingjun Ge
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View article: Design of a high-efficiency S-band relativistic klystron oscillator under a low guiding magnetic field
Design of a high-efficiency S-band relativistic klystron oscillator under a low guiding magnetic field Open
A high-efficiency S-band relativistic klystron oscillator (RKO) under a low guiding magnetic field is proposed and investigated in detail in this paper. Two-stage segmented modulation is introduced to compensate for the poor coherence of t…
View article: Design of an X-band high-efficiency coaxial relativistic klystron oscillator packaged with permanent magnet
Design of an X-band high-efficiency coaxial relativistic klystron oscillator packaged with permanent magnet Open
An X-band high-power microwave (HPM) oscillator packaged with permanent magnets is proposed. The oscillator employs a radially non-uniform modulation cavity structure to enhance the modulation depth of the electron beam, thereby improving …
View article: An X-band coaxial relativistic klystron oscillator with a novel diode structure packaged with permanent magnet
An X-band coaxial relativistic klystron oscillator with a novel diode structure packaged with permanent magnet Open
To achieve compactness and miniaturization for high-power microwave devices, this paper proposes an X-band permanent magnet-packaged coaxial relativistic klystron oscillator (RKO) with a novel diode structure featuring a stair-step cathode…
View article: A Beam-Steerable Wideband Reflectarray Antenna for C-Band High-Power Microwave Application
A Beam-Steerable Wideband Reflectarray Antenna for C-Band High-Power Microwave Application Open
A beam-steerable wideband reflectarray antenna (WRA) for -band high-power microwave (HPM) application is presented in this paper. The -band WRA comprises a multimode conical horn antenna with high power handling capacity (PHC), special de…
View article: Improved Power Capacity in a Low-Magnetic Field and High-Efficiency Transit-Time Oscillator by a Double-Gap Extractor
Improved Power Capacity in a Low-Magnetic Field and High-Efficiency Transit-Time Oscillator by a Double-Gap Extractor Open
With an increase in the input power of a low-magnetic field and high-efficiency transit-time oscillator, the deceleration electric field in the single-gap extractor increases sharply to output a higher-power microwave, resulting in radio f…
View article: Excitation and suppression of asymmetric modes in a coaxial relativistic klystron amplifier with cascaded single-gap bunching cavities
Excitation and suppression of asymmetric modes in a coaxial relativistic klystron amplifier with cascaded single-gap bunching cavities Open
The excitation and suppression of asymmetric modes in a coaxial relativistic klystron amplifier (RKA) with cascaded single-gap bunching cavities are analyzed in this paper. Through theoretical analysis and simulated verification, we find t…
View article: Research on coaxial transit time oscillator with low magnetic field and high efficiency
Research on coaxial transit time oscillator with low magnetic field and high efficiency Open
An improved X-band coaxial transit time oscillator is proposed in this paper. First, the device uses a non-uniform three-gap modulation cavity to improve the clustering of electron beams under a low magnetic field and to increase the depth…
View article: A two-buncher high-efficiency transit-time oscillator with a low guiding magnetic field
A two-buncher high-efficiency transit-time oscillator with a low guiding magnetic field Open
The energy consumption of high-power microwave sources has attracted much attention in the research field of high-power microwaves. One way of decreasing the energy consumption is to reduce the guiding magnetic field. In this work, a high-…
View article: A Ku-Band Compact Disk-Beam Relativistic Klystron Oscillator Operating at Low Guiding Magnetic Field
A Ku-Band Compact Disk-Beam Relativistic Klystron Oscillator Operating at Low Guiding Magnetic Field Open
The disk-beam relativistic klystron oscillator (DB-RKO) with the radial-line high frequency structure is one of the attractive high power microwave (HPM) sources due to its specific virtues of weak space-charge effect, high power handling …
View article: A high-efficiency cross-band Cerenkov microwave generator with a resonant reflector
A high-efficiency cross-band Cerenkov microwave generator with a resonant reflector Open
High efficiency and short saturation time have great significance on the practical work of high power microwave devices. A dual-band Cerenkov microwave generator with high-efficiency based on electrical tuning is presented in this paper. T…
View article: Influence of the radial dimension on the high-frequency characteristics in the coaxial relativistic O-type Cherenkov oscillators
Influence of the radial dimension on the high-frequency characteristics in the coaxial relativistic O-type Cherenkov oscillators Open
Coaxial slow wave structures have always been used to enhance the power handling capacity in the relativistic O-type Cherenkov oscillators generally. However, little attention has been paid to the regularity and the problem it may bring by…
View article: A high power capacity Ka-band radial transit time oscillator with one-gap extraction cavity
A high power capacity Ka-band radial transit time oscillator with one-gap extraction cavity Open
The radial transit time oscillator (RTTO) is promising to realize high power output of millimeter-waves. Although the radial structure can enhance the power capacity, less cavities and small radial dimension make it difficult to improve th…
View article: A high-efficiency L-band coaxial three-period relativistic Cherenkov oscillator
A high-efficiency L-band coaxial three-period relativistic Cherenkov oscillator Open
Miniaturization is one of the important research directions of low frequency high power microwave sources. This paper presents a three-period coaxial slow-wave structure L-band high-power microwave source. Because the coaxial Quasi-TEM mod…
View article: Investigation of a cross-band relativistic Cherenkov oscillator based on the cathode adjustment
Investigation of a cross-band relativistic Cherenkov oscillator based on the cathode adjustment Open
The mechanism and realization of a cross-band relativistic Cherenkov oscillator based on the cathode adjustment are presented. The device adopts coaxial dual-annular cathode to emit the inner and the outer electron beams, independently. Wh…
View article: Simulative research on reverse current in magnetically insulated coaxial diode
Simulative research on reverse current in magnetically insulated coaxial diode Open
The reverse current tends to occur in the transition region of the guiding magnetic field in a magnetically insulated coaxial diode (MICD). Influence of the guiding magnetic field on characteristics of the MICD especially on the reverse cu…
View article: Research progresses on Cherenkov and transit-time high-power microwave sources at NUDT
Research progresses on Cherenkov and transit-time high-power microwave sources at NUDT Open
Research progresses on Cherenkov and transit-time high-power microwave (HPM) sources in National University of Defense Technology (NUDT) of China are presented. The research issues are focused on the following aspects. The pulse-shortening…