An Analog Receiver Designing of 55-65MHz Band Radio Astronomy Observation

The Ground-based antenna arrays are important radio observation instruments in low (Very High Frequency) band, but in this band, the observations have to face the bad radio environments and the high sky temperature. In this paper, we introduce a new kind of analog receiver working in low band based on the MMIC (Microwave Monolithic Integrated Circuit) chips. This receiver consists of primary band pass filter, primary amplifier, secondary band pass filter, 180 degree phase shifter and two secondary primary amplifiers. Based on the radio environment testing results in the Yunnan observation site, this analog receiver achieves band passing and amplifying for the observation band from 55-65MHz, and this receiver's system noise temperature is nearly 320K, the gain is nearly 63dB. At the same time, as a part of the Chinese low frequency band observation net, based on the MMIC technologies, this receiver has smaller volume, lower price and is easy to copy.