Measurement of complex electromagnetic parameters of composite materials by free-space method;

This paper discussed the free-space method,a kind of Broad-band measurement method for electromagnetic property parameters of microwave and millimeter wave;it put forward the principle and system of measurement of complex permittivity and permeability using free-space method.

This paper details the principle of measurement of complex permittivity and permibilityusing free-space method ,and discuess some basic problems of the construction of the system and thecalibration tichniqu.

Developments of free-space quantum key distribution;

Study on quantum key bit rate in free-space quantum cryptography;

Developments of free-space quantum cryptography;

Key techniques of free space laser communication;

The design of optical free space communication system with the optical fiber coupling system;

Spectral and temporal properties of spatially and spectrally partially coherent Gaussian Schell-model pulsed beams in free space;

Then free space radiation mode(FSRM) was employed to calculate the reflected and trans.

The two pattems are very similar in the following four aspects: assumption, freedom of space, hint of space, open of space.

Novel model for the spatial degrees of freedom of MIMO wireless systems;