Multiple frequency range and high-power spiral line row wave tube with direct ridge waveguide output
A ridge waveguide and helix technology, applied in the field of microwave electric vacuum devices, can solve the problems of reducing the useful output power and overall efficiency of the traveling wave tube by the conversion transition device, damage to the helical traveling wave tube, thermal damage, etc., and achieve good output matching. performance effect
Inactive Publication Date: 2010-01-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] ①The connection between the end of the helix and the conductor in the coaxial output window is a high-risk area for thermal damage
This vicious circle is another reason why the helical traveling wave tube is often damaged, and the loss of the conversion transition device also reduces the useful output power and overall efficiency of the traveling wave tube
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0019] The present invention has four technical points:
[0020] ① Local welding technology at the end of the helix uses four trapezoidal beryllium oxide ceramic clamping rods (generally three) to clamp the helix. The inner side of the clamping rod with the most serious heat generation is welded with the helical copper strip, and the outer side is welded with the oxygen-free copper outer conductor shell cooled by water, which realizes good thermal contact and improves the heat dissipation performance.
[0021] ②The new helix-ridge waveguide transition structure uses a special matching metal strip to connect the end of the helix to the tube wall by welding directly through oxygen-free copper, which ensures a good heat dissipation path; The wall constitutes a special transformation structure, which completes the transformation from the helical mode to the ridge waveguide mode and ensures impedance matching. In the 2-4GHz frequency range, the design standing wave coefficient is ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A direct ridge waveguide output octave high-power helix traveling wave tube relates to a microwave vacuum element technology, especially a wide band high-power helix traveling wave tube. The invention comprises a traveling wave tube and a ridge waveguide section, the tube is set in with a helix thread, the ridge waveguide section comprises a ridge waveguide, the helix thread is connected with the waveguide wall via a matching transition section to form a heat transfer connection; the matching transition section is composed of a helix-coaxial thread transition section, a coaxial thread-stripe thread transition section, a stripe thread-flat ridge waveguide transition section, a flat ridge waveguide-ridge waveguide transition section. The invention has advantages of effectively enhancing output power of traveling wave tube and keeping wide frequency band of helix traveling wave tube, in order to avoid negative effect and limit on output power caused by traditional procedures of firstly outputting from the coaxial window, then switching to the ridge waveguide output helix traveling wave tube.
Description
technical field [0001] The invention relates to microwave electric vacuum device technology, in particular to a broadband high-power helical traveling wave tube. Background technique [0002] Broadband high-power traveling wave tube is the core device of radar and electronic countermeasure equipment. Octave band traveling wave tube generally adopts helical slow wave line and coaxial ceramic output window structure. In practical applications, when it is necessary to use a broadband ridge waveguide to transmit microwaves to the antenna, a coaxial-ridge waveguide conversion adapter is often used to transition to a ridge waveguide transmission line. [0003] The advantage of this structure is that there is enough frequency band, which can reach an octave or even higher, but the disadvantage is that the heat dissipation performance is poor and the output power is limited. because: [0004] ①The connection between the end of the helix and the conductor in the coaxial output win...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H01J25/34H01J23/26H01J23/00
Inventor 李家胤汪海洋李明光
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA