The present invention belongs to the test field of wireless communication receiving systems and relates to a multi-channel synthetic noise coefficient-based test method According to the multi-channel synthetic noise coefficient-based test method of the invention, the phases and amplitudes of channels in an N channel-integrated receiving system can be obtained ingeniously; and the phases of the channels are adjusted to be the same phase, and therefore, the problem of the deterioration or inaccuracy of noise coefficients which is caused by the full or partial offset of signals caused by the difference of the phases of the channels in a process where a noise coefficient instrument is directly adopted to perform synthetic noise measurement on the receiving system can be effectively avoided

Multi-channel synthetic noise coefficient-based test method

An equivalent port circuit and a method for designing and measuring a broadband active dipole antenna using an equivalent impedance circuit are provided to measure a gain and a noise factor of the broadband active dipole antenna without a specific facility like an anechoic chamber. An active dipole antenna measuring device includes an active antenna(100) and a measuring device(200). An active antenna includes an equivalent circuit(110) and an active circuit(120). An equivalent circuit has the antenna and the equivalent impedance. The equivalent circuit has a narrow band characteristic. The measuring device measures the characteristic of the active antenna. The measuring device includes a noise signal generator(210) and a noise factor analyzer(220). The noise signal generator measures the gain of the active antenna and the noise factor. The noise factor analyzer is connected to the active antenna.

Song Jun Ho

Papers

Design and measurement method of a broadband active dipole antenna using the equivalent port and equivalent impedance circuit