Title : High Fidelity RF Analog Front-end Receiver Chain

RF analog front-end receiver is a crucial component in radio telescope systems, which processes the required frequency band for successful digitization of the received radio astronomy signals from the sky. The SKA-LOW radio telescope is a low-frequency aperture array operating in the frequency range 50-350 MHz, and composed of 130,000 antenna elements spread over tens of kilometers and is located in Western Australia. We planned to observe in the SKA-Low frequency band, between 130 to 350 MHz at the Gauribidanur observatory and also characterize the tile processing modules (TPM). In order to validate the beamforming capabilities using the sky signals, we have developed a broadband Hi-Fidelity RF Analog Conditioning Receiver system, that consists of a LNA and high gain tubular receiver. We have incorporated special enhancements to the receiver to operate it in the city RFI prone environments. The RF signal from the antenna (Log-Periodic Antenna) are transported to the digital receivers. This talk, provides salient details of the analog receiver design details and the performances achieved and the results from testing the receiver electronics in the lab and from their usage in the Gauribidanur field station.