.3 Mm Frequency Stabilized Pulsed Avalanche Oscillator

The millimeter-wave technology is near and several decades to come, and especially obtain a new technology of the important breakthrough in the last two decades.Millimeter -wave theories and its technology of increasingly mature, promote and expand front that the millimeter-wave applied realm, can not only resolve the spectrum source problems that hustle and perplex the people, and also expand the higher spectrum source to provide the theories and technology with the support for us.With developing deep of millimeter-wave frequency band, the frequency stability on millimeter-wave solid-state oscillator is an important guideline.Therefore ,the frequency stability of the research for oscillator is important thesis.this text introduces the steady frequency pulsed IMPATT oscillator used for the helicopter,used for transmitter of 3 mm non-coherent radar ,and take into the design,the debugging and results of the oscillator .The oscillator works during the -55癈 ~+70癈,and its output power is larger than IW.Its output signal passes through two stages injection-locked amplification, and the output power of the transmitter is larger than 10W. The main task of this thesis resolves the stability of the power and frequency with the variation of environment temperature for 3 mm-wave oscillator.Therefore, with extensively checking the foundation of the Chinese and Foreign cultural data,we adopt the following measurements to achieve the frequency stability for the IMPATT oscillator.Making use of the high Q resonant cavity to increase the frequency stability;making use of the material of the different thermal swell coefficient to proceed the temperature compensation of resonant cavity, and to increase the temperature stability;using the adjustable pulsed current modulator to provide the IMPATT diode , to compensate the frequency variation of the oscillator during intrapulse.In chapter one ,the survey of the development and present condition for 3 mm frequency band solid-state oscillator is given, and the necessity to study oscillators with high frequency stability;In chapter two,the physics characteristic of IMP ATT diode and the work principle of IMPATT diode oscillator are introduced;In chapter three,the work principle and the, method of the design on IMPATT diode oscillator are given;In chapter four,firstly discussing the frequency stability and the means to stable frequency of oscillator,then the work principle and the method of design for high Q resonant cavity are given,finally, discussing the current temperature compensation of IMPATT diode oscillator during intrapulse; In chapter five,the debugging means and the measurement results of oscillator are introduced.The debugging and experimental results show that 3 mm-wave steady frequency pulsed IMPATT diode oscillator can not only output the high power,and alse have an advantage of high frequency stability etc.The oscillator may satisfy the system requirement.