METHOD AND DEVICE FOR MEASURING ANTENNA GAIN Russian patent published in 1998 - IPC

FIELD: radio engineering. SUBSTANCE: measuring system has two channels each incorporating antenna 1, set of variable complex loads 4 and 5, set of filters 6.1, 7.1, amplifiers 6.2, 7.2, frequency changers 6.3, 7.3. Both channels are connected to amplitude and phase difference ratio meter 11. Proposed device can be used for investigating internal and external characteristics of antenna operating in high-, medium-, and low-frequency bands for serviceability check of antennas at radio centers to measure their gain and input impedance without radiating electromagnetic waves by investigated antenna into atmosphere. EFFECT: improved measurement accuracy and noise immunity. 5 cl, 7 dwg