Journal ArticleDOI
A Multiple-Diode High-Average-Power Avalanche-Diode Oscillator (Correspondence)
TLDR
In this article, a simple circuit which allows direct combining of the power obtainable from several avalanche diodes is presented, which does not require extremely close matching of dc or RF diode characteristics, and no particular isolating networks such as hybrid combiners are necessary.Abstract:
This correspondence presents a simple circuit which allows direct combining of the power obtainable from several avalanche diodes. The circuit does not require extremely close matching of dc or RF diode characteristics, and no particular isolating networks such as hybrid combiners are necessary. CW power output exceeding 4 watts at 7 GHz and 3 watts at 9 GHz has been demonstrated in a device employing five diodes. The number of diodes which can be combined using this technique is limited by geometric and heat sink considerations. Descriptions of typical single-diode and multiple-diode oscillators are given along with equivalent circuits. The circuits employ resistors or resistor networks to suppress low-frequency oscillations and undesired resonances which occur when several oscillators are coupled together. Negligible insertion loss is incurred at the design output frequency. Measured performance is given on similar single- and multiple-diode oscillators. Data include frequency, power, AM noise, FM noise, temperature, and loaded Q.read more
Citations
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Journal ArticleDOI
Injection locking of microwave solid-state oscillators
TL;DR: Injection locking of microwave solid-state oscillators is discussed in this article, based on the familiar theorem that the total impedance times the current is equal to the applied voltage, based on which the locking range, large-signal injection, locking stability, and AM and FM noise are analyzed.
Journal ArticleDOI
Millimeter-Wave Power-Combining Techniques
Kai Chang,Cheng Sun +1 more
TL;DR: In this article, the authors summarized different power-combining techniques and their performance, with particular emphasis on millimeter-wave developments, and discussed the tradeoffs of these techniques and future trends predicted.
Journal ArticleDOI
Microwave Power Combining Techniques
TL;DR: A review of various techniques for coherently combining microwave power from two or more sources is presented in this paper, where the authors focus on techniques which combine solid-state power sources and the performances obtained with the most successful techniques are described.
Journal ArticleDOI
The Single-Cavity Multiple-Device Oscillator
TL;DR: In this article, the output power from 12 IMPATT diodes has been combined in a single-cavity multiple-device oscillator and the condition for stable operation, the noise performance, and the locking behavior of the oscillator are discussed.
Journal ArticleDOI
Millimeter-Wave Power Combiner Using Quasi-Optical Techniques
L. Wandinger,V. Nalbandian +1 more
TL;DR: In this article, a millimeter- or submillimeter-wave combiner using a quasi-optical open resonator to effectively combine the power output of several solid-state oscillators to a single frequency is described.
References
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Journal ArticleDOI
A proposed high-frequency, negative-resistance diode
TL;DR: In this paper, a semiconductor diode designed to operate as an oscillator when mounted in a suitable microwave cavity is described and analyzed, and it appears possible to obtain over 20 watts of ac power in continuous operation at 5 kmc.
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Negative resistance in p-n junctions under avalanche breakdown conditions, part II
TL;DR: In this paper, the small-signal impedance of the space-charge region of p-n junctions under avalanche breakdown conditions is calculated using reasonably realistic dependences of electron and hole ionization rates and drift velocities upon electric field.
Journal ArticleDOI
The Packaged and Mounted Diode as a Microwave Circuit
TL;DR: In this paper, the authors considered the packaged diode as a radial-line structure and proposed an analytical justification for the incorporation of the diode circuit with the circuits of waveguide, coaxial-line, and strip-line diode mounts.
Journal ArticleDOI
A large signal analysis of IMPATT diodes
W.J. Evans,G.I. Haddad +1 more
TL;DR: In this paper, the power output and efficiency of a Read-type IMPATT diode was analyzed using a closed-form solution of the nonlinear equations describing a Read type diode.