Hui-Zhen Li

Optimized design of quasi-optical source-array of solid state source power combiner at frequency 100 GHz

It is determined for the structure of the source-array located in inner surface of input quasi-optical resonator operating at frequency 100GHz using Type WT5731 GaAs Gunn diodes made in P.R. China (fundamental frequency 50 GHz). An adaptable phase coupling has been achieved and RF output power exceeded the sum of the individual diode outputs by from three to seven times.

Optimization calculation of solid state power combining source of waveguide cavity

The optimization theory and calculation for waveguide cavity solid state power combiner in centimeter-wave and millimeter-wave region are discussed. The optimization theory of the combiner is to obtain the best structure and the best parameters by CAD(computer-aided design) technique so that higher output power, higher combining efficiency, compactness and steady properties can be achieved for the combiner.

Two millimeter solid-state source global optimum for quasi-optics power combiner

A global optimization method for discussing quasi-optical power combiner of solid-state millimeter-wave source is provided. The device we use operate at about 150 GHz and GaAs Gunn diodes are chosen here as active sources arranged in a planar matrix of N×N (N-3,5,..., 2k+1, where h is positive integer). The best array and the location of the active elements in the source-array plane which is the surface of one reflector we will discribe later can be given by global optimization, where the radio frequency power can reach sixfold to ninefold larger than the total sum of the individual diode power.

A global optimization method for quasi-optics power combiner

This paper describes an algorithm which can determine a neighborhood of the global optimum of an objective function and an estimate of the global optimum.This method wasemployed to determine global optimum of the fundamental mode power, the fractional power of the fundamental mode and the combining efficiency. Given this information, a local optimization procedure can be employed to local the global optimum.

A global optimization design for quasi-optics power combiner of 3mm wave solid-state sources

This paper describes a global optimization design for quasi-optics power combiner of solid-state millimeter-wave sources. The operating frequency is about 100 GHz and the oscillating sources are GaAs Gunn diodes. The source-array plane is a matrix consisting of NxN (N=3,5, ..., 2k+1, where k is positive integer) diodes. The radio frequency power of the combiner is from threefold to sevenfold larger than the sum total of the single diodes power. The global optimums of the array and the location in the cuvity of the suorce-array plane will be given by a global optimizition method.

Global optimization method in millimeter wave combiner

This paper describes an algorithm which can determine the global optima of the power combiner of solid-state millimeter wave resonator. The global optimization mehtod can determine a neighborhood of the global optima of an objective function and an estimation of the global optima. In this paper the objective function as follow: In the quasi-optical resonator, the objective function are the fundamental mode power, the fractional power of fundamental mode and the combining dfficiecy were done the objective functiona respectively, to calculate the global optima respectively.In the power combiner of solid-state millimeter wave source in rectangular waveguide cavity. the performance parameter are presentes by combining efficiency, tuning range, frequency drift, and FM noise were done the objective functions respectively. And to calculate the global optima respectively.

The design of quasi-optics power combiner of millimeter wave

This paper presents a theoretical method for design quasi-optics power combiner of solid-state millimeter — wave sources, and gives theory analysis to some problem concerned. Here is the structure:1.Epitome of microwave power combiner.2.Gauss light beam and the field distribution in the resonator.3.The design of the resonator(1)Confocal resonator(2)Objective function(3)The global optimization method and the program flow chart.4.Example5.Reference

MMW SOURCE CAD IN QUASI-OPTICAL RESONATOR

This paper presents a quasi-optical resonator that design methode basic on IBM PC computer (CAD). There is an exellent method to calculate global optima of the fundamental mode power, fractional power of the fundamental mode and combining efficiency etc. It also presents a process of CAD of microcomputer.

Millimeter wave source in the rectangular waveguide cavity

This paper describes a power combiner of solid—state millimeter wave in rectangular cavity. The operating frequency is about 50 GHz. And the sources of excitation are GaAs Gunn deodes. Final presents the performance parameter, combining efficiency, tuning range, frequency drift, and FM noise, etc.This paper also presents a millimeter wave source of rectangular waveguide cavity. Using an exellent algorithm to design rectangular waveguide cavity of power combimer. The algorithm gives the mathematial model, on the basis of the mathematial model, using CAD of PC microcomputer to design the parameters of the cavity. This paper presents a program of CAD of micocomputer.

Multiple Diodes Quasi-Optical Oscillater

This paper presents quasi-optics techniques, millimeter techniques and a global optimization method etc techniques. It is a structure of quasi-optics power combiner, that includes a spherical reflection, that the radius of the curvature is R and another one is a hybrid reflector that is called input reflector. The space of the both reflectors is LL. The monolithic source-array is made up of 25 Gunn diodes that are mounted of parallel brass bars that have low thermal resistance. And the bars are fixed on the inner plane surface of the hybrid reflector. The hybrid reflector made up of a plane and a spherical, that the radius of the curvature are R. It is designed that higher fundamental mode power, larger fractional power of fundamental mode power and more combining efficiency of the quasi-optics power combiner.This paper describes an algorithm, which can determine the global optima of the power combiner of solid-state millimeter wave resonator. The global optimization method can determine a neighborhood of the global optima of an objective function and an estimation of the global optima. In the quasi-optical resonator, the objective functions are the fundamental mode power, the fractional power of fundamental mode and the combining efficiency respectively.