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The invention belongs to the technical field of wireless system application, and particularly relates to a radio frequency-based wireless signal test platform system and a building method thereof, and the system comprises an Android master control terminal, a radio frequency communication module and an environment sensing unit; the android master control terminal carries an industrial-grade android equipment operating system, an integrated presentation layer, a business logic layer and a data access layer; the radio frequency communication module is connected with the Android master control terminal through a serial interface and is used for dynamically configuring frequency bands, spreading factors and bandwidth parameters; an environment database is established by setting an Android master control terminal, a radio frequency communication module and an environment sensing unit, adaptive communication capability testing of various radio frequency modules is realized, wireless signal data can be visually tested anytime and anywhere by using an established testing platform and environment data, and dependence on a traditional darkroom and a frequency spectrograph is avoided; and self-adaptive setting of frequency bands, spreading factors and bandwidths of the module in different environments is realized through an existing environment database.

This invention relates to the field of artificial electromagnetic materials technology and discloses an electrically controlled phase-encoded metasurface structure, comprising, from top to bottom, a top unit structure layer, a first dielectric substrate layer, an intermediate ground layer, a second dielectric substrate layer, and a bottom bias layer. The top unit structure layer includes two C-shaped metal patches with their openings facing back-to-back, and a PIN diode connected between the two metal patches. Each metal patch is connected to the bottom bias layer through a metal via, and the bottom bias layer is externally connected to a voltage source. This invention uses an electrically controlled method to quickly and conveniently change the electromagnetic response of the metasurface unit, solving the problem that the electromagnetic wave response and electromagnetic function of traditional metasurfaces are fixed once designed and manufactured, making them unable to meet the needs of complex electromagnetic systems. It also provides a new approach for intelligent metasurface design, meeting the high integration requirements of intelligent components in practice.