New structure of two - area cathodes gunn diodes 新型雙區(qū)陰極結(jié)構(gòu)體效應(yīng)二極管
Be sure your gunn diode doesn ' t oscillate at audio or hf as well 確信你的耿氏二極管沒有同時在音頻或高頻振蕩。
The lumped circuit model of gunn diode was incorporated into the fdtd arithmetic Gunn二極管的集總電路模型被編入了fdtd算法。
Semiconductor discrete device . detail specification for gunn diodes for type 2ey5671 , 2ey5672 半導(dǎo)體分立器件. 2ey5671 2ey5672型體效應(yīng)二極管詳細(xì)規(guī)范
Semiconductor discrete device . detail specification for gunn diodes for type 2ey621 , 2ey622 , 2ey623 半導(dǎo)體分立器件. 2ey621 2ey622 2ey623型體效應(yīng)二極管詳細(xì)規(guī)范
In addition , this paper numerically investigated the influence of the lumped parameters of the gunn diode on the frequency of the oscillation , and the tuning techniques of the oscillation frequency of the active antenna 本文還利用fdtd法數(shù)值研究了gunn二極管的集總參數(shù)對振蕩頻率的影響以及有源天線振蕩頻率的調(diào)諧技術(shù)。
Compared with gunn diode , mesfet has the advantage of high efficiency , flexible design and easy to integrate . the two ports negative resistance oscillating network is analyzed and an extremum - line model of microwave transistor oscillating network output impedance is developed Mesfet較之gunn二極管在vco電路中有效率高、設(shè)計(jì)靈活性、便于集成等優(yōu)點(diǎn),所以本文著重介紹了變?nèi)莨苷{(diào)諧微帶結(jié)構(gòu)mesfetvco的研制工作。
First of all , single port negative impedance oscillator is analyzed in the thesis . a design method of gunn diode vco is introduced and an vco chip using gunn diode is fabricated . the substrate of the vco chip is gaas with dimension of 4 . 4mmx3 . 9mm 本文首先對單端口負(fù)阻振蕩器進(jìn)行了分析,給出了gunn二極管負(fù)阻振蕩器的設(shè)計(jì)方法,設(shè)計(jì)出了一個變?nèi)莨苷{(diào)諧平面微帶gunn二極管vco芯片,該芯片以gaas為襯底,尺寸為4 . 4mm 3 . 9mm 。
And the general procedures of these methods are summarized . finally , some practical problems are analyzed using fdtd , which include passive linear resistor element and nonlinear diode element in the microwave circuits and an integrated antenna embedded with an active gunn diode element and a dielectric cavity resonator 最后,本文通過編程模擬了微波電路中的無源線性器件電阻和非線性器件二極管,含有有源器件gunn二極管的有源集成微帶天線以及介質(zhì)腔諧振器等具體實(shí)例,來驗(yàn)證各種方法的可行性和有效性,計(jì)算結(jié)果與實(shí)驗(yàn)結(jié)果吻合。
It also gives the motive of the ka - band vco and mixer , associated with the subject ' s requirement and the realistic conditions , according to which a proposal is confirmed that the gunn diode and the varactor are mounted in the same cavity to fulfill the vco and an antiparallel diode pair is used to fulfill the harmonic mixer . in chapter 2 , based on the basic theory of negative resistance oscillating , we analyses the gunn oscillator and it ’ s tuning character . chapter 3 introduces the theory of millimeter - wave harmonic mixer 以此為根據(jù)結(jié)合課題需要和實(shí)驗(yàn)室的實(shí)際條件,確定vco采用耿氏管腔體振蕩器形式,變?nèi)莨芘c耿氏管安裝在同一個腔內(nèi)以進(jìn)一步減小體積,采用反向并聯(lián)二極管實(shí)現(xiàn)諧波混頻;第二章介紹負(fù)阻振蕩器理論及其調(diào)諧原理;第三章介紹毫米波諧波混頻器基本原理;第四章給出了振蕩器及諧波混頻器的設(shè)計(jì)過程,整個組件聯(lián)調(diào)的結(jié)果;最后是結(jié)束語,分析了電路中存在的問題,指出了改進(jìn)方向。