H01J25/34 - CPC Classification Index

ClassID:

204920 ⎘

H01J25/34 - CPC Classification

Classification description:

Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps

Sub-classes:

H01J25/36 » Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field 4
H01J25/42 » Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and with a magnet system producing an H-field crossing the E-field 7
H01J25/48 » Tubes in which two electron streams of different velocities interact with one another, e.g. electron-wave tube 1
H01J25/49 » Tubes using the parametric principle, e.g. for parametric amplification 1

Recent Application in this class:

20260038760

2026-02-05

MAGNETO-ELECTROSTATIC SENSING, FOCUSING, AND STEERING OF ELECTRON BEAMS IN VACUUM ELECTRON DEVICES

20250317115

2025-10-09

DIRECTED SELF-ASSEMBLY OF HELICES VIA ELECTRODEPOSITION ON END-TETHERED NANOMEMBRANE RIBBONS FOR MILLIMETER-WAVE TRAVELING-WAVE TUBE AMPLIFIERS

20250182994

2025-06-05

MULTI-LAYER VACUUM ELECTRON DEVICE AND METHOD OF MANUFACTURE

20250095945

2025-03-20

ELECTRON GUN AND VACUUM ELECTRONIC DEVICE

20250070736

2025-02-27

Travelling-Wave Tube, Electron Gun, and Power Amplification System

20240371593

2024-11-07

GEOMETRIC FEATURES FOR LAYER AND FEATURE ALIGNMENT AND INSPECTION FOR USE IN LAYERED ADDITIVE MANUFACTURING OF PASSIVE AND ACTIVE RADIO FREQUENCY (RF) ELECTRONICS

20240258061

2024-08-01

MAGNETO-ELECTROSTATIC SENSING, FOCUSING, AND STEERING OF ELECTRON BEAMS IN VACUUM ELECTRON DEVICES

20240242916

2024-07-18

Multi-layer vacuum electron device and method of manufacture

20230420212

2023-12-28

TECHNIQUE FOR MULTI-STREAM ELECTRON BEAM GENERATION WITH DIFFERENT ENERGIES AND COMPARABLE CURRENTS FROM A SINGLE CATHODE POTENTIAL FOR HIGH POWER MICROWAVE SOURCES

#10

20230207246

2023-06-29

Power supply device, microwave tube device, power supply method, and recording medium

#11

20230103140

2023-03-30

Dielectric coated plasmonic photoemitter

#12

20220246381

2022-08-04

Travelling-wave tube

#13

20220157550

2022-05-19

Magneto-electrostatic sensing, focusing, and steering of electron beams in vacuum electron devices

#14

20220157549

2022-05-19

Multi-layer vacuum electron device and method of manufacture

#15

20220044904

2022-02-10

Methods of making a self-assembled slow-wave structures

#16

20210335567

2021-10-28

Arrangement of conduction-cooled travelling wave tubes and method for manufacturing an arrangement

#17

20210099142

2021-04-01

Traveling wave tube amplifier having a helical slow-wave structure supported by a cylindrical scaffold

#18

20200402758

2020-12-24

Slow-wave circuit, traveling wave tube, and method for manufacturing traveling wave tube

#19

20200162045

2020-05-21

High-frequency module with connection interface

#20

20200058460

2020-02-20

Microwave amplification device including a microwave electron tube having a getter that can be controlled

#21

20170141745

2017-05-18

Energy supply unit for a traveling wave tube

#22

20160293376

2016-10-06

TRAVELING WAVE TUBE

#23

20160126051

2016-05-05

Metamaterial high-power microwave source

#24

20160099127

2016-04-07

Electron device and method for manufacturing an electron device

#25

20150256139

2015-09-10

Traveling wave tube loaded by a material having negative permittivity and positive permeability

#26

20140292191

2014-10-02

Traveling wave tube system and control method of traveling wave tube

#27

20140292190

2014-10-02

Electron tube

#28

20140253230

2014-09-11

Method for operating a traveling-wave tube module

#29

20140227968

2014-08-14

Control apparatus for a transmit amplifier unit

#30

20140077695

2014-03-20

Supercharged electron source in a signal emission system

#31

20130200789

2013-08-08

Electromagnetic wave oscillator having multi-tunnel and electromagnetic wave generating apparatus including the electromagnetic wave oscillator

#32

20120286657

2012-11-15

Planar helix slow-wave structure with straight-edge connections

#33

20120268203

2012-10-25

Power management system for dual travelling wave tube amplifier

#34

20120248979

2012-10-04

High frequency helical amplifier and oscillator

#35

20120229024

2012-09-13

Electron source for linear accelerators

#36

20120187832

2012-07-26

High frequency helical amplifier and oscillator

#37

20120181930

2012-07-19

High frequency helical amplifier and oscillator

#38

20120181927

2012-07-19

High frequency helical amplifier and oscillator

#39

20120176034

2012-07-12

High frequency helical amplifier and oscillator

#40

20120133280

2012-05-31

Coupled cavity traveling wave tube

#41

20120119646

2012-05-17

Helical slow-wave structure including a helix of rectagular cross-section having grooves therein adapted to receive supporting rods therein

#42

20120081003

2012-04-05

Terahertz interaction structure including a folded waveguide with a ridge structure and having an electron beam tunnel passing through the ridge structure

#43

20120043427

2012-02-23

Absorbent dome for a radiating collector tube

#44

20110266951

2011-11-03

Microwave tube with device for extracting ions produced in the tube

#45

20110169405

2011-07-14

Terahertz radiation sources and methods of manufacturing the same

#46

20110169404

2011-07-14

Traveling wave electron device with membrane-supported slow wave circuit

#47

20110156830

2011-06-30

Microelectromechanical system device and method of manufacturing the microelectromechanical system device

#48

20110064414

2011-03-17

Overmoded cavity bounded by first and second grids for providing electron beam/RF signal interaction that is transversely distributed across the cavity

#49