4 results about "Backward-wave oscillator" patented technology

The invention discloses a miniaturized periodic permanent magnet focusing metamaterial backward wave oscillator, which comprises a metamaterial slow wave structure, a coupling cavity, a periodic permanent magnet focusing system and a coaxial output interface, the metamaterial slow-wave structure comprises a waveguide shell, a periodic resonance structure and a first vacuum gap; the coupling cavity comprises a coupling cavity shell, a coupling cavity inner conductor and a second vacuum gap; the coupling cavity inner conductor is connected with the periodic resonance structure and the coaxial output interface; the periodic permanent magnet focusing system comprises a first permanent magnet focusing structure and a second permanent magnet focusing structure which are asymmetrically arranged up and down, and the metamaterial slow wave structure is arranged between the first permanent magnet focusing structure and the second permanent magnet focusing structure. According to the backward wave oscillator, the metamaterial slow wave structure and the periodic permanent magnet focusing system are arranged, and the coupled cavity is multiplexed as the collector, so that the size of the backward wave oscillator is reduced. And an asymmetric focusing magnetic field is generated through the asymmetrically arranged periodic permanent magnet focusing system, so that electron beams can perform energy exchange better.

The invention discloses a W-band double-injection-double-channel backward-wave oscillator array system, and aims to overcome the defects that an existing W-band low-voltage backward-wave oscillator is limited in output power, insufficient in power synthesis isolation degree, serious in mutual injection interference and difficult to miniaturize and integrate in structure. By designing two paths of double-strip beam slow-wave backward-wave oscillators and a matched high-isolation power division-synthesis network, multi-source phase self-adaption and high-efficiency power superposition are realized, the output power and the spectrum stability are remarkably improved under the condition of keeping low-voltage driving, meanwhile, the compact device size, the simple microwave interconnection and the system-level integration are considered, and the high-isolation power division-synthesis network is realized. And a high-performance radiation source solution is provided for applications such as high-resolution radar imaging, broadband communication and portable terahertz testing.

The application discloses a frequency multiplication backward wave oscillator and a harmonic amplification method. The frequency multiplication backward wave oscillator comprises a first slow wave structure and a second slow wave structure. The first slow wave structure comprises a first electron beam channel and a first grating extending along the first electron beam channel. The second slow wave structure comprises a second electron beam channel and a second grating and a third grating extending along the second electron beam channel. The working frequency of the third grating is N times of the working frequencies of the first grating and the second grating, wherein N is a positive integer. A connecting waveguide is connected between the first electron beam channel and the second electron beam channel. A first output port is arranged on the second electron beam channel. The application can significantly reduce the starting current density, improve the output power and shorten the starting time by using one slow wave structure to generate electromagnetic waves for one electron beam and then delivering the electromagnetic waves to another slow wave structure to modulate another electron beam.

This application relates to a slow-wave structure and a backward-wave oscillator. The slow-wave structure includes a periodic waveguide; the periodic waveguide includes a first structure and a second structure arranged oppositely, wherein, in a first direction, the end faces of the first structure and the second structure arranged oppositely are end faces with periodically varying undulations, the projections of the peak portions of the first structure and the second structure in the first direction coincide, and the distance between the peak portion of the first structure and the peak portion of the second structure is a minimum value. Injection channels are formed at the trough portion of the first structure and the peak portion of the second structure, and the injection channels communicate with each other in the first direction to form an electron beam channel. Using this slow-wave structure can provide a larger working current and improve the interaction coupling impedance, thereby enhancing the output performance of the backward-wave oscillator.