Quantcast The Magnetron

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
2-23 electron gun end of the tube toward the collector is not used in the bwo. Instead, the bwo extracts energy from the electron. beam by using a backward wave that travels from the collector toward the electron gun (cathode). Otherwise, the electron bunching action and energy extraction from the electron beam is very similar to the actions in a twt. The typical bwo is constructed from a folded transmission line or waveguide that winds back and forth across the path of the electron beam, as shown in figure 2-16. The folded waveguide in the illustration serves the same purpose as the helix in a twt. The fixed spacing of the folded waveguide limits the bandwidth of the bwo. Since the frequency of a given waveguide is constant, the frequency of the bwo is controlled by the transit time of the electron beam. The transit time is controlled by the collector potential. Thus, the output frequency can be changed by varying the collector voltage, which is a definite advantage. As in the twt, the electron beam in the bwo is focused by a magnet placed around the body of the tube. Figure 2-16.—Typical bwo. Q-26.   What is the primary use of the twt? Q-27.   The magnet surrounding the body of a twt serves what purpose? Q-28.   How are the input and output directional couplers in a twt connected to the helix? Q-29.   What relationship must exist between the electron beam and the traveling wave for bunching to occur in the electron beam of a twt? Q-30.   What structure in the twt delays the forward progress of the traveling wave? The Magnetron The MAGNETRON, shown in figure 2-17A, is a self-contained microwave oscillator that operates differently from the linear-beam tubes, such as the twt and the klystron. Figure 2-17B is a simplified drawing of the magnetron. CROSSED-ELECTRON and MAGNETIC fields are used in the magnetron to produce the high-power output required in radar and communications equipment.


Electrical News
Samsung Shows 14nm Chip
Samsung showed a working mobile-applications processor made in its 14nm...
eetimes.com
ARM Partners Explore M7 Horizon
ARM partners discuss new use cases for the Cortex-M7 MCU,...
eetimes.com
After Patient Deaths, Thoratec Reinstates Former CEO
Thoratec Corp. has replaced CEO Gary Burbach with the man...
eetimes.com
Saddleback Sale - It's Happy Dance Time
The folks at Saddleback Leather are having a sale, and...
eetimes.com
7 Tricks for Estimating Battery Life Accurately
Here are seven tricks that -- if followed -- can...
eetimes.com
Spansion to Launch 3D-Embedded Automotive MCU
Spansion will launch a new microcontroller designed to offer high-performance...
eetimes.com
Intel Leads Non-iPad Tablet Processor Market
Intel, striving to get processor design wins in mobile devices,...
eetimes.com
FDA's Device Approvals Come Under Fire, Again
A recent study concludes that most medical devices cleared via...
eetimes.com
Wearables & IoT Boom Creates Supply Chain Challenges
Great ideas for new wearables or connected electronic devices can...
eetimes.com
ARM Extends Into IoT Software
ARM has announced plans for IoT device and cloud software...
eetimes.com
Oven Performance Shows Flip Side of Thermal Management
The standard, ubiquitous cooking oven is not only inefficient but...
eetimes.com
Tabula's DesignInsight Offers 100% Observability Into 3PLDs
It's not going too far to say that Tabula's DesignInsight...
eetimes.com
MediaTek May Narrow Qualcomm's Lead in China's 4G Market
MediaTek has a chance to narrow Qualcomm's lead in China's...
eetimes.com
EEVblog #669 – FLIR TG165 Thermal Imager Teardown
What’s inside the new FLIR TG165 Visual IR Thermometer /...
eevblog.com
Connected Car Takes Center Stage at CTIA
Reporting from Super Mobility Week, Steve Bell gives us insights...
eetimes.com
Microsoft Announces Windows 10
Microsoft execs emphasize the desktop UI, say Windows 10's final...
eetimes.com
Air Conditioner Falls From Window, Still Works
Sometimes, it's the mundane things in electrical and electronic devices...
eetimes.com
Air Conditioner Falls From Window, Still Works
Sometimes, it's the mundane things in electrical and electronic devices...
eetimes.com
Robots Confront Safety Standards
An emerging crop of industrial robots will be more user-friendly...
eetimes.com
Electronic Brain by 2023
Progress continues on fake brain to be used as test...
eetimes.com
 


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +